+++ /dev/null
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-#include <string>
-#include <fstream>
-#include <iostream>
-
-#include "thrift/platform.h"
-#include "thrift/generate/t_generator.h"
-
-using std::map;
-using std::ofstream;
-using std::ostringstream;
-using std::string;
-using std::vector;
-using std::set;
-
-static const string endl("\n"); // avoid ostream << std::endl flushes
-static const string SERVICE_RESULT_VARIABLE("result_value");
-static const string RESULT_STRUCT_SUFFIX("Result");
-static const string RUST_RESERVED_WORDS[] = {
- "abstract", "alignof", "as", "become",
- "box", "break", "const", "continue",
- "crate", "do", "else", "enum",
- "extern", "false", "final", "fn",
- "for", "if", "impl", "in",
- "let", "loop", "macro", "match",
- "mod", "move", "mut", "offsetof",
- "override", "priv", "proc", "pub",
- "pure", "ref", "return", "Self",
- "self", "sizeof", "static", "struct",
- "super", "trait", "true", "type",
- "typeof", "unsafe", "unsized", "use",
- "virtual", "where", "while", "yield"
-};
-const set<string> RUST_RESERVED_WORDS_SET(
- RUST_RESERVED_WORDS,
- RUST_RESERVED_WORDS + sizeof(RUST_RESERVED_WORDS)/sizeof(RUST_RESERVED_WORDS[0])
-);
-
-static const string SYNC_CLIENT_GENERIC_BOUND_VARS("<IP, OP>");
-static const string SYNC_CLIENT_GENERIC_BOUNDS("where IP: TInputProtocol, OP: TOutputProtocol");
-
-// FIXME: extract common TMessageIdentifier function
-// FIXME: have to_rust_type deal with Option
-
-class t_rs_generator : public t_generator {
-public:
- t_rs_generator(
- t_program* program,
- const std::map<std::string, std::string>&,
- const std::string&
- ) : t_generator(program) {
- gen_dir_ = get_out_dir();
- }
-
- /**
- * Init and close methods
- */
-
- void init_generator() override;
- void close_generator() override;
-
- /**
- * Program-level generation functions
- */
-
- void generate_typedef(t_typedef* ttypedef) override;
- void generate_enum(t_enum* tenum) override;
- void generate_const(t_const* tconst) override;
- void generate_struct(t_struct* tstruct) override;
- void generate_xception(t_struct* txception) override;
- void generate_service(t_service* tservice) override;
-
-private:
- // struct type
- // T_REGULAR: user-defined struct in the IDL
- // T_ARGS: struct used to hold all service-call parameters
- // T_RESULT: struct used to hold all service-call returns and exceptions
- // T_EXCEPTION: user-defined exception in the IDL
- enum e_struct_type { T_REGULAR, T_ARGS, T_RESULT, T_EXCEPTION };
-
- // Directory to which generated code is written.
- string gen_dir_;
-
- // File to which generated code is written.
- ofstream_with_content_based_conditional_update f_gen_;
-
- // Write the common compiler attributes and module includes to the top of the auto-generated file.
- void render_attributes_and_includes();
-
- // Create the closure of Rust modules referenced by this service.
- void compute_service_referenced_modules(t_service *tservice, set<string> &referenced_modules);
-
- // Write the rust representation of an enum.
- void render_enum_definition(t_enum* tenum, const string& enum_name);
-
- // Write the impl blocks associated with the traits necessary to convert an enum to/from an i32.
- void render_enum_conversion(t_enum* tenum, const string& enum_name);
-
- // Write the impl block associated with the rust representation of an enum. This includes methods
- // to write the enum to a protocol, read it from a protocol, etc.
- void render_enum_impl(const string& enum_name);
-
- // Write a simple rust const value (ie. `pub const FOO: foo...`).
- void render_const_value(const string& name, t_type* ttype, t_const_value* tvalue);
-
- // Write a constant list, set, map or struct. These constants require allocation and cannot be defined
- // using a 'pub const'. As a result, I create a holder struct with a single `const_value` method that
- // returns the initialized instance.
- void render_const_value_holder(const string& name, t_type* ttype, t_const_value* tvalue);
-
- // Write the actual const value - the right side of a const definition.
- void render_const_value(t_type* ttype, t_const_value* tvalue, bool is_owned = true);
-
- // Write a const struct (returned from `const_value` method).
- void render_const_struct(t_type* ttype, t_const_value* tvalue);
-
- // Write a const list (returned from `const_value` method).
- void render_const_list(t_type* ttype, t_const_value* tvalue);
-
- // Write a const set (returned from `const_value` method).
- void render_const_set(t_type* ttype, t_const_value* tvalue);
-
- // Write a const map (returned from `const_value` method).
- void render_const_map(t_type* ttype, t_const_value* tvalue);
-
- // Write the code to insert constant values into a rust vec or set. The
- // `insert_function` is the rust function that we'll use to insert the elements.
- void render_container_const_value(
- const string& insert_function,
- t_type* ttype,
- t_const_value* tvalue
- );
-
- // Write the rust representation of a thrift struct to the generated file. Set `struct_type` to `T_ARGS`
- // if rendering the struct used to pack arguments for a service call. When `struct_type` is `T_ARGS` the
- // struct and its members have module visibility, and all fields are required. When `struct_type` is
- // anything else the struct and its members have public visibility and fields have the visibility set
- // in their definition.
- void render_struct(const string& struct_name, t_struct* tstruct, t_rs_generator::e_struct_type struct_type);
-
- // Write the comment block preceding a type definition (and implementation).
- void render_type_comment(const string& struct_name);
-
- // Write the rust representation of a thrift struct. Supports argument structs, result structs,
- // user-defined structs and exception structs. The exact struct type to be generated is controlled
- // by the `struct_type` parameter, which (among other things) modifies the visibility of the
- // written struct and members, controls which trait implementations are generated.
- void render_struct_definition(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
- );
-
- // Writes the impl block associated with the rust representation of a struct. At minimum this
- // contains the methods to read from a protocol and write to a protocol. Additional methods may
- // be generated depending on `struct_type`.
- void render_struct_impl(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
- );
-
- // Generate a `fn new(...)` for a struct with name `struct_name` and type `t_struct`. The auto-generated
- // code may include generic type parameters to make the constructor more ergonomic. `struct_type` controls
- // the visibility of the generated constructor.
- void render_struct_constructor(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
- );
-
- // Write the `ok_or` method added to all Thrift service call result structs. You can use this method
- // to convert a struct into a `Result` and use it in a `try!` or combinator chain.
- void render_result_struct_to_result_method(t_struct* tstruct);
-
- // Write the implementations for the `Error` and `Debug` traits. These traits are necessary for a
- // user-defined exception to be properly handled as Rust errors.
- void render_exception_struct_error_trait_impls(const string& struct_name, t_struct* tstruct);
-
- // Write the implementations for the `Default`. This trait allows you to specify only the fields you want
- // and use `..Default::default()` to fill in the rest.
- void render_struct_default_trait_impl(const string& struct_name, t_struct* tstruct);
-
- // Write the function that serializes a struct to its wire representation. If `struct_type` is `T_ARGS`
- // then all fields are considered "required", if not, the default optionality is used.
- void render_struct_sync_write(t_struct *tstruct, t_rs_generator::e_struct_type struct_type);
-
- // Helper function that serializes a single struct field to its wire representation. Unpacks the
- // variable (since it may be optional) and serializes according to the optionality rules required by `req`.
- // Variables in auto-generated code are passed by reference. Since this function may be called in
- // contexts where the variable is *already* a reference you can set `field_var_is_ref` to `true` to avoid
- // generating an extra, unnecessary `&` that the compiler will have to automatically dereference.
- void render_struct_field_sync_write(
- const string &field_var,
- bool field_var_is_ref,
- t_field *tfield,
- t_field::e_req req);
-
- // Write the rust function that serializes a single type (i.e. a i32 etc.) to its wire representation.
- // Variables in auto-generated code are passed by reference. Since this function may be called in
- // contexts where the variable is *already* a reference you can set `type_var_is_ref` to `true` to avoid
- // generating an extra, unnecessary `&` that the compiler will have to automatically dereference.
- void render_type_sync_write(const string &type_var, bool type_var_is_ref, t_type *ttype);
-
- // Write a list to the output protocol. `list_variable` is the variable containing the list
- // that will be written to the output protocol.
- // Variables in auto-generated code are passed by reference. Since this function may be called in
- // contexts where the variable is *already* a reference you can set `list_var_is_ref` to `true` to avoid
- // generating an extra, unnecessary `&` that the compiler will have to automatically dereference.
- void render_list_sync_write(const string &list_var, bool list_var_is_ref, t_list *tlist);
-
- // Write a set to the output protocol. `set_variable` is the variable containing the set that will
- // be written to the output protocol.
- // Variables in auto-generated code are passed by reference. Since this function may be called in
- // contexts where the variable is *already* a reference you can set `set_var_is_ref` to `true` to avoid
- // generating an extra, unnecessary `&` that the compiler will have to automatically dereference.
- void render_set_sync_write(const string &set_var, bool set_var_is_ref, t_set *tset);
-
- // Write a map to the output protocol. `map_variable` is the variable containing the map that will
- // be written to the output protocol.
- // Variables in auto-generated code are passed by reference. Since this function may be called in
- // contexts where the variable is *already* a reference you can set `map_var_is_ref` to `true` to avoid
- // generating an extra, unnecessary `&` that the compiler will have to automatically dereference.
- void render_map_sync_write(const string &map_var, bool map_var_is_ref, t_map *tset);
-
- // Return `true` if we need to dereference ths type when writing an element from a container.
- // Iterations on rust containers are performed as follows: `for v in &values { ... }`
- // where `v` has type `&RUST_TYPE` All defined functions take primitives by value, so, if the
- // rendered code is calling such a function it has to dereference `v`.
- bool needs_deref_on_container_write(t_type* ttype);
-
- // Return the variable (including all dereferences) required to write values from a rust container
- // to the output protocol. For example, if you were iterating through a container and using the temp
- // variable `v` to represent each element, then `ttype` is the type stored in the container and
- // `base_var` is "v". The return value is the actual string you will have to use to properly reference
- // the temp variable for writing to the output protocol.
- string string_container_write_variable(t_type* ttype, const string& base_var);
-
- // Write the code to read bytes from the wire into the given `t_struct`. `struct_name` is the
- // actual Rust name of the `t_struct`. If `struct_type` is `T_ARGS` then all struct fields are
- // necessary. Otherwise, the field's default optionality is used.
- void render_struct_sync_read(const string &struct_name, t_struct *tstruct, t_rs_generator::e_struct_type struct_type);
-
- // Write the rust function that deserializes a single type (i.e. i32 etc.) from its wire representation.
- // Set `is_boxed` to `true` if the resulting value should be wrapped in a `Box::new(...)`.
- void render_type_sync_read(const string &type_var, t_type *ttype, bool is_boxed = false);
-
- // Read the wire representation of a list and convert it to its corresponding rust implementation.
- // The deserialized list is stored in `list_variable`.
- void render_list_sync_read(t_list *tlist, const string &list_variable);
-
- // Read the wire representation of a set and convert it to its corresponding rust implementation.
- // The deserialized set is stored in `set_variable`.
- void render_set_sync_read(t_set *tset, const string &set_variable);
-
- // Read the wire representation of a map and convert it to its corresponding rust implementation.
- // The deserialized map is stored in `map_variable`.
- void render_map_sync_read(t_map *tmap, const string &map_variable);
-
- // Return a temporary variable used to store values when deserializing nested containers.
- string struct_field_read_temp_variable(t_field* tfield);
-
- // Top-level function that calls the various render functions necessary to write the rust representation
- // of a thrift union (i.e. an enum).
- void render_union(t_struct* tstruct);
-
- // Write the enum corresponding to the Thrift union.
- void render_union_definition(const string& union_name, t_struct* tstruct);
-
- // Write the enum impl (with read/write functions) for the Thrift union.
- void render_union_impl(const string& union_name, t_struct* tstruct);
-
- // Write the `ENUM::write_to_out_protocol` function.
- void render_union_sync_write(const string &union_name, t_struct *tstruct);
-
- // Write the `ENUM::read_from_in_protocol` function.
- void render_union_sync_read(const string &union_name, t_struct *tstruct);
-
- // Top-level function that calls the various render functions necessary to write the rust representation
- // of a Thrift client.
- void render_sync_client(t_service* tservice);
-
- // Write the trait with the service-call methods for `tservice`.
- void render_sync_client_trait(t_service *tservice);
-
- // Write the trait to be implemented by the client impl if end users can use it to make service calls.
- void render_sync_client_marker_trait(t_service *tservice);
-
- // Write the code to create the Thrift service sync client struct and its matching 'impl' block.
- void render_sync_client_definition_and_impl(const string& client_impl_name);
-
- // Write the code to create the `SyncClient::new` functions as well as any other functions
- // callers would like to use on the Thrift service sync client.
- void render_sync_client_lifecycle_functions(const string& client_struct);
-
- // Write the code to create the impl block for the `TThriftClient` trait. Since generated
- // Rust Thrift clients perform all their operations using methods defined in this trait, we
- // have to implement it for the client structs.
- void render_sync_client_tthriftclient_impl(const string &client_impl_name);
-
- // Write the marker traits for any service(s) being extended, including the one for the current
- // service itself (i.e. `tservice`)
- void render_sync_client_marker_trait_impls(t_service *tservice, const string &impl_struct_name);
-
- // Generate a list of all the traits this Thrift client struct extends.
- string sync_client_marker_traits_for_extension(t_service *tservice);
-
- // Top-level function that writes the code to make the Thrift service calls.
- void render_sync_client_process_impl(t_service* tservice);
-
- // Write the actual function that calls out to the remote service and processes its response.
- void render_sync_send_recv_wrapper(t_function* tfunc);
-
- // Write the `send` functionality for a Thrift service call represented by a `t_service->t_function`.
- void render_sync_send(t_function* tfunc);
-
- // Write the `recv` functionality for a Thrift service call represented by a `t_service->t_function`.
- // This method is only rendered if the function is *not* oneway.
- void render_sync_recv(t_function* tfunc);
-
- void render_sync_processor(t_service *tservice);
-
- void render_sync_handler_trait(t_service *tservice);
- void render_sync_processor_definition_and_impl(t_service *tservice);
- void render_sync_process_delegation_functions(t_service *tservice);
- void render_sync_process_function(t_function *tfunc, const string &handler_type);
- void render_process_match_statements(t_service* tservice);
- void render_sync_handler_succeeded(t_function *tfunc);
- void render_sync_handler_failed(t_function *tfunc);
- void render_sync_handler_failed_user_exception_branch(t_function *tfunc);
- void render_sync_handler_failed_application_exception_branch(t_function *tfunc, const string &app_err_var);
- void render_sync_handler_failed_default_exception_branch(t_function *tfunc);
- void render_sync_handler_send_exception_response(t_function *tfunc, const string &err_var);
- void render_service_call_structs(t_service* tservice);
- void render_service_call_args_struct(t_function* tfunc);
- void render_service_call_result_value_struct(t_function* tfunc);
-
- string handler_successful_return_struct(t_function* tfunc);
-
- // Writes the result of `render_thrift_error_struct` wrapped in an `Err(thrift::Error(...))`.
- void render_thrift_error(
- const string& error_kind,
- const string& error_struct,
- const string& sub_error_kind,
- const string& error_message
- );
-
- // Write a thrift::Error variant struct. Error structs take the form:
- // ```
- // pub struct error_struct {
- // kind: sub_error_kind,
- // message: error_message,
- // }
- // ```
- // A concrete example is:
- // ```
- // pub struct ApplicationError {
- // kind: ApplicationErrorKind::Unknown,
- // message: "This is some error message",
- // }
- // ```
- void render_thrift_error_struct(
- const string& error_struct,
- const string& sub_error_kind,
- const string& error_message
- );
-
- // Return a string containing all the unpacked service call args given a service call function
- // `t_function`. Prepends the args with either `&mut self` or `&self` and includes the arg types
- // in the returned string, for example:
- // `fn foo(&mut self, field_0: String)`.
- string rust_sync_service_call_declaration(t_function* tfunc, bool self_is_mutable);
-
- // Return a string containing all the unpacked service call args given a service call function
- // `t_function`. Only includes the arg names, each of which is prefixed with the optional prefix
- // `field_prefix`, for example: `self.field_0`.
- string rust_sync_service_call_invocation(t_function* tfunc, const string& field_prefix = "");
-
- // Return a string containing all fields in the struct `tstruct` for use in a function declaration.
- // Each field is followed by its type, for example: `field_0: String`.
- string struct_to_declaration(t_struct* tstruct, t_rs_generator::e_struct_type struct_type);
-
- // Return a string containing all fields in the struct `tstruct` for use in a function call,
- // for example: `field_0: String`.
- string struct_to_invocation(t_struct* tstruct, const string& field_prefix = "");
-
- // Write the documentation for a struct, service-call or other documentation-annotated element.
- void render_rustdoc(t_doc* tdoc);
-
- // Return `true` if the true type of `ttype` is a thrift double, `false` otherwise.
- bool is_double(t_type* ttype);
-
- // Return a string representing the rust type given a `t_type`.
- string to_rust_type(t_type* ttype, bool ordered_float = true);
-
- // Return a string representing the `const` rust type given a `t_type`
- string to_rust_const_type(t_type* ttype, bool ordered_float = true);
-
- // Return a string representing the rift `protocol::TType` given a `t_type`.
- string to_rust_field_type_enum(t_type* ttype);
-
- // Return the default value to be used when initializing a struct field which has `OPT_IN_REQ_OUT`
- // optionality.
- string opt_in_req_out_value(t_type* ttype);
-
- // Return `true` if we can write a const of the form `pub const FOO: ...`.
- bool can_generate_simple_const(t_type* ttype);
-
- // Return `true` if we cannot write a standard Rust constant (because the type needs some allocation).
- bool can_generate_const_holder(t_type* ttype);
-
- // Return `true` if this type is a void, and should be represented by the rust `()` type.
- bool is_void(t_type* ttype);
-
- t_field::e_req actual_field_req(t_field* tfield, t_rs_generator::e_struct_type struct_type);
-
- // Return `true` if this `t_field::e_req` is either `t_field::T_OPTIONAL` or `t_field::T_OPT_IN_REQ_OUT`
- // and needs to be wrapped by an `Option<TYPE_NAME>`, `false` otherwise.
- bool is_optional(t_field::e_req req);
-
- // Return `true` if the service call has arguments, `false` otherwise.
- bool has_args(t_function* tfunc);
-
- // Return `true` if a service call has non-`()` arguments, `false` otherwise.
- bool has_non_void_args(t_function* tfunc);
-
- // Return `pub ` (notice trailing whitespace!) if the struct should be public, `` (empty string) otherwise.
- string visibility_qualifier(t_rs_generator::e_struct_type struct_type);
-
- // Returns the namespace prefix for a given Thrift service. If the type is defined in the presently-computed
- // Thrift program, then an empty string is returned.
- string rust_namespace(t_service* tservice);
-
- // Returns the namespace prefix for a given Thrift type. If the type is defined in the presently-computed
- // Thrift program, then an empty string is returned.
- string rust_namespace(t_type* ttype);
-
- // Returns the camel-cased name for a Rust struct type. Handles the case where `tstruct->get_name()` is
- // a reserved word.
- string rust_struct_name(t_struct* tstruct);
-
- // Returns the snake-cased name for a Rust field or local variable. Handles the case where
- // `tfield->get_name()` is a reserved word.
- string rust_field_name(t_field* tstruct);
-
- // Returns the camel-cased name for a Rust union type. Handles the case where `tstruct->get_name()` is
- // a reserved word.
- string rust_union_field_name(t_field* tstruct);
-
- // Converts any variable name into a 'safe' variant that does not clash with any Rust reserved keywords.
- string rust_safe_name(const string& name);
-
- // Return `true` if the name is a reserved Rust keyword, `false` otherwise.
- bool is_reserved(const string& name);
-
- // Return the name of the function that users will invoke to make outgoing service calls.
- string service_call_client_function_name(t_function* tfunc);
-
- // Return the name of the function that users will have to implement to handle incoming service calls.
- string service_call_handler_function_name(t_function* tfunc);
-
- // Return the name of the struct used to pack the arguments for the thrift service call.
- string service_call_args_struct_name(t_function* tfunc);
-
- // Return the name of the struct used to pack the return value
- // and user-defined exceptions for the thrift service call.
- string service_call_result_struct_name(t_function* tfunc);
-
- string rust_sync_client_marker_trait_name(t_service* tservice);
-
- // Return the trait name for the sync service client given a `t_service`.
- string rust_sync_client_trait_name(t_service* tservice);
-
- // Return the name for the sync service client struct given a `t_service`.
- string rust_sync_client_impl_name(t_service* tservice);
-
- // Return the trait name that users will have to implement for the server half of a Thrift service.
- string rust_sync_handler_trait_name(t_service* tservice);
-
- // Return the struct name for the server half of a Thrift service.
- string rust_sync_processor_name(t_service* tservice);
-
- // Return the struct name for the struct that contains all the service-call implementations for
- // the server half of a Thrift service.
- string rust_sync_processor_impl_name(t_service *tservice);
-
- // Return the variant name for an enum variant
- string rust_enum_variant_name(const string& name);
-
- // Properly uppercase names for use in Rust.
- string rust_upper_case(const string& name);
-
- // Snake-case field, parameter and function names and make them Rust friendly.
- string rust_snake_case(const string& name);
-
- // Camel-case type/variant names and make them Rust friendly.
- string rust_camel_case(const string& name);
-
- // Replace all instances of `search_string` with `replace_string` in `target`.
- void string_replace(string& target, const string& search_string, const string& replace_string);
-
- // Adjust field identifier to correctly handle unspecified field identifiers
- // THRIFT-4953
- string rust_safe_field_id(int32_t id);
-};
-
-void t_rs_generator::init_generator() {
- // make output directory for this thrift program
- MKDIR(gen_dir_.c_str());
-
- // create the file into which we're going to write the generated code
- string f_gen_name = gen_dir_ + "/" + rust_snake_case(get_program()->get_name()) + ".rs";
- f_gen_.open(f_gen_name.c_str());
-
- // header comment
- f_gen_ << "// " << autogen_summary() << endl;
- f_gen_ << "// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING" << endl;
- f_gen_ << endl;
-
- render_attributes_and_includes();
-}
-
-void t_rs_generator::render_attributes_and_includes() {
- // turn off some compiler/clippy warnings
-
- // code always includes BTreeMap/BTreeSet/OrderedFloat
- f_gen_ << "#![allow(unused_imports)]" << endl;
- // code might not include imports from crates
- f_gen_ << "#![allow(unused_extern_crates)]" << endl;
- // constructors take *all* struct parameters, which can trigger the "too many arguments" warning
- // some auto-gen'd types can be deeply nested. clippy recommends factoring them out which is hard to autogen
- f_gen_ << "#![cfg_attr(feature = \"cargo-clippy\", allow(too_many_arguments, type_complexity))]" << endl;
- // prevent rustfmt from running against this file
- // lines are too long, code is (thankfully!) not visual-indented, etc.
- f_gen_ << "#![cfg_attr(rustfmt, rustfmt_skip)]" << endl;
- f_gen_ << endl;
-
- // add standard includes
- f_gen_ << "extern crate thrift;" << endl;
- f_gen_ << endl;
- f_gen_ << "use thrift::OrderedFloat;" << endl;
- f_gen_ << "use std::cell::RefCell;" << endl;
- f_gen_ << "use std::collections::{BTreeMap, BTreeSet};" << endl;
- f_gen_ << "use std::convert::{From, TryFrom};" << endl;
- f_gen_ << "use std::default::Default;" << endl;
- f_gen_ << "use std::error::Error;" << endl;
- f_gen_ << "use std::fmt;" << endl;
- f_gen_ << "use std::fmt::{Display, Formatter};" << endl;
- f_gen_ << "use std::rc::Rc;" << endl;
- f_gen_ << endl;
- f_gen_ << "use thrift::{ApplicationError, ApplicationErrorKind, ProtocolError, ProtocolErrorKind, TThriftClient};" << endl;
- f_gen_ << "use thrift::protocol::{TFieldIdentifier, TListIdentifier, TMapIdentifier, TMessageIdentifier, TMessageType, TInputProtocol, TOutputProtocol, TSetIdentifier, TStructIdentifier, TType};" << endl;
- f_gen_ << "use thrift::protocol::field_id;" << endl;
- f_gen_ << "use thrift::protocol::verify_expected_message_type;" << endl;
- f_gen_ << "use thrift::protocol::verify_expected_sequence_number;" << endl;
- f_gen_ << "use thrift::protocol::verify_expected_service_call;" << endl;
- f_gen_ << "use thrift::protocol::verify_required_field_exists;" << endl;
- f_gen_ << "use thrift::server::TProcessor;" << endl;
- f_gen_ << endl;
-
- // add all the program includes
- // NOTE: this is more involved than you would expect because of service extension
- // Basically, I have to find the closure of all the services and include their modules at the top-level
-
- set<string> referenced_modules;
-
- // first, start by adding explicit thrift includes
- const vector<t_program*> includes = get_program()->get_includes();
- vector<t_program*>::const_iterator includes_iter;
- for(includes_iter = includes.begin(); includes_iter != includes.end(); ++includes_iter) {
- referenced_modules.insert((*includes_iter)->get_name());
- }
-
- // next, recursively iterate through all the services and add the names of any programs they reference
- const vector<t_service*> services = get_program()->get_services();
- vector<t_service*>::const_iterator service_iter;
- for (service_iter = services.begin(); service_iter != services.end(); ++service_iter) {
- compute_service_referenced_modules(*service_iter, referenced_modules);
- }
-
- // finally, write all the "pub use..." declarations
- if (!referenced_modules.empty()) {
- set<string>::iterator module_iter;
- for (module_iter = referenced_modules.begin(); module_iter != referenced_modules.end(); ++module_iter) {
- f_gen_ << "use " << rust_snake_case(*module_iter) << ";" << endl;
- }
- f_gen_ << endl;
- }
-}
-
-void t_rs_generator::compute_service_referenced_modules(
- t_service *tservice,
- set<string> &referenced_modules
-) {
- t_service* extends = tservice->get_extends();
- if (extends) {
- if (extends->get_program() != get_program()) {
- referenced_modules.insert(extends->get_program()->get_name());
- }
- compute_service_referenced_modules(extends, referenced_modules);
- }
-}
-
-void t_rs_generator::close_generator() {
- f_gen_.close();
-}
-
-//-----------------------------------------------------------------------------
-//
-// Consts
-//
-// NOTE: consider using macros to generate constants
-//
-//-----------------------------------------------------------------------------
-
-// This is worse than it should be because constants
-// aren't (sensibly) limited to scalar types
-void t_rs_generator::generate_const(t_const* tconst) {
- string name = tconst->get_name();
- t_type* ttype = tconst->get_type();
- t_const_value* tvalue = tconst->get_value();
-
- if (can_generate_simple_const(ttype)) {
- render_const_value(name, ttype, tvalue);
- } else if (can_generate_const_holder(ttype)) {
- render_const_value_holder(name, ttype, tvalue);
- } else {
- throw "cannot generate const for " + name;
- }
-}
-
-void t_rs_generator::render_const_value(const string& name, t_type* ttype, t_const_value* tvalue) {
- if (!can_generate_simple_const(ttype)) {
- throw "cannot generate simple rust constant for " + ttype->get_name();
- }
-
- f_gen_ << "pub const " << rust_upper_case(name) << ": " << to_rust_const_type(ttype) << " = ";
- render_const_value(ttype, tvalue, false);
- f_gen_ << ";" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_const_value_holder(const string& name, t_type* ttype, t_const_value* tvalue) {
- if (!can_generate_const_holder(ttype)) {
- throw "cannot generate constant holder for " + ttype->get_name();
- }
-
- string holder_name("Const" + rust_camel_case(name));
-
- f_gen_ << indent() << "pub struct " << holder_name << ";" << endl;
- f_gen_ << indent() << "impl " << holder_name << " {" << endl;
- indent_up();
-
- f_gen_ << indent() << "pub fn const_value() -> " << to_rust_type(ttype) << " {" << endl;
- indent_up();
- render_const_value(ttype, tvalue);
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_const_value(t_type* ttype, t_const_value* tvalue, bool is_owned) {
- if (ttype->is_base_type()) {
- t_base_type* tbase_type = (t_base_type*)ttype;
- switch (tbase_type->get_base()) {
- case t_base_type::TYPE_STRING:
- if (tbase_type->is_binary()) {
- if (is_owned) {
- f_gen_ << "\"" << tvalue->get_string() << "\""<< ".to_owned().into_bytes()";
- } else {
- f_gen_ << "b\"" << tvalue->get_string() << "\"";
- }
- } else {
- f_gen_ << "\"" << tvalue->get_string() << "\"";
- if (is_owned) {
- f_gen_ << ".to_owned()";
- }
- }
- break;
- case t_base_type::TYPE_BOOL:
- f_gen_ << (tvalue->get_integer() ? "true" : "false");
- break;
- case t_base_type::TYPE_I8:
- case t_base_type::TYPE_I16:
- case t_base_type::TYPE_I32:
- case t_base_type::TYPE_I64:
- f_gen_ << tvalue->get_integer();
- break;
- case t_base_type::TYPE_DOUBLE:
- f_gen_ << "OrderedFloat::from(" << tvalue->get_double() << " as f64)";
- break;
- default:
- throw "cannot generate const value for " + t_base_type::t_base_name(tbase_type->get_base());
- }
- } else if (ttype->is_typedef()) {
- render_const_value(get_true_type(ttype), tvalue);
- } else if (ttype->is_enum()) {
- f_gen_ << indent() << "{" << endl;
- indent_up();
- f_gen_
- << indent()
- << to_rust_type(ttype)
- << "::try_from("
- << tvalue->get_integer()
- << ").expect(\"expecting valid const value\")"
- << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- } else if (ttype->is_struct() || ttype->is_xception()) {
- render_const_struct(ttype, tvalue);
- } else if (ttype->is_container()) {
- f_gen_ << indent() << "{" << endl;
- indent_up();
-
- if (ttype->is_list()) {
- render_const_list(ttype, tvalue);
- } else if (ttype->is_set()) {
- render_const_set(ttype, tvalue);
- } else if (ttype->is_map()) {
- render_const_map(ttype, tvalue);
- } else {
- throw "cannot generate const container value for " + ttype->get_name();
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- } else {
- throw "cannot generate const value for " + ttype->get_name();
- }
-}
-
-void t_rs_generator::render_const_struct(t_type* ttype, t_const_value*) {
- if (((t_struct*)ttype)->is_union()) {
- f_gen_ << indent() << "{" << endl;
- indent_up();
- f_gen_ << indent() << "unimplemented!()" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- } else {
- f_gen_ << indent() << "{" << endl;
- indent_up();
- f_gen_ << indent() << "unimplemented!()" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
-}
-
-void t_rs_generator::render_const_list(t_type* ttype, t_const_value* tvalue) {
- t_type* elem_type = ((t_list*)ttype)->get_elem_type();
- f_gen_ << indent() << "let mut l: Vec<" << to_rust_type(elem_type) << "> = Vec::new();" << endl;
- const vector<t_const_value*>& elems = tvalue->get_list();
- vector<t_const_value*>::const_iterator elem_iter;
- for(elem_iter = elems.begin(); elem_iter != elems.end(); ++elem_iter) {
- t_const_value* elem_value = (*elem_iter);
- render_container_const_value("l.push", elem_type, elem_value);
- }
- f_gen_ << indent() << "l" << endl;
-}
-
-void t_rs_generator::render_const_set(t_type* ttype, t_const_value* tvalue) {
- t_type* elem_type = ((t_set*)ttype)->get_elem_type();
- f_gen_ << indent() << "let mut s: BTreeSet<" << to_rust_type(elem_type) << "> = BTreeSet::new();" << endl;
- const vector<t_const_value*>& elems = tvalue->get_list();
- vector<t_const_value*>::const_iterator elem_iter;
- for(elem_iter = elems.begin(); elem_iter != elems.end(); ++elem_iter) {
- t_const_value* elem_value = (*elem_iter);
- render_container_const_value("s.insert", elem_type, elem_value);
- }
- f_gen_ << indent() << "s" << endl;
-}
-
-void t_rs_generator::render_const_map(t_type* ttype, t_const_value* tvalue) {
- t_type* key_type = ((t_map*)ttype)->get_key_type();
- t_type* val_type = ((t_map*)ttype)->get_val_type();
- f_gen_
- << indent()
- << "let mut m: BTreeMap<"
- << to_rust_type(key_type) << ", " << to_rust_type(val_type)
- << "> = BTreeMap::new();"
- << endl;
- const map<t_const_value*, t_const_value*, t_const_value::value_compare>& elems = tvalue->get_map();
- map<t_const_value*, t_const_value*, t_const_value::value_compare>::const_iterator elem_iter;
- for (elem_iter = elems.begin(); elem_iter != elems.end(); ++elem_iter) {
- t_const_value* key_value = elem_iter->first;
- t_const_value* val_value = elem_iter->second;
- if (get_true_type(key_type)->is_base_type()) {
- f_gen_ << indent() << "let k = ";
- render_const_value(key_type, key_value);
- f_gen_ << ";" << endl;
- } else {
- f_gen_ << indent() << "let k = {" << endl;
- indent_up();
- render_const_value(key_type, key_value);
- indent_down();
- f_gen_ << indent() << "};" << endl;
- }
- if (get_true_type(val_type)->is_base_type()) {
- f_gen_ << indent() << "let v = ";
- render_const_value(val_type, val_value);
- f_gen_ << ";" << endl;
- } else {
- f_gen_ << indent() << "let v = {" << endl;
- indent_up();
- render_const_value(val_type, val_value);
- indent_down();
- f_gen_ << indent() << "};" << endl;
- }
- f_gen_ << indent() << "m.insert(k, v);" << endl;
- }
- f_gen_ << indent() << "m" << endl;
-}
-
-void t_rs_generator::render_container_const_value(
- const string& insert_function,
- t_type* ttype,
- t_const_value* tvalue
-) {
- if (get_true_type(ttype)->is_base_type()) {
- f_gen_ << indent() << insert_function << "(";
- render_const_value(ttype, tvalue);
- f_gen_ << ");" << endl;
- } else {
- f_gen_ << indent() << insert_function << "(" << endl;
- indent_up();
- render_const_value(ttype, tvalue);
- indent_down();
- f_gen_ << indent() << ");" << endl;
- }
-}
-
-//-----------------------------------------------------------------------------
-//
-// Typedefs
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::generate_typedef(t_typedef* ttypedef) {
- std::string actual_type = to_rust_type(ttypedef->get_type());
- f_gen_ << "pub type " << rust_safe_name(ttypedef->get_symbolic()) << " = " << actual_type << ";" << endl;
- f_gen_ << endl;
-}
-
-//-----------------------------------------------------------------------------
-//
-// Enums
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::generate_enum(t_enum* tenum) {
- string enum_name(rust_camel_case(tenum->get_name()));
- render_enum_definition(tenum, enum_name);
- render_enum_impl(enum_name);
- render_enum_conversion(tenum, enum_name);
-}
-
-void t_rs_generator::render_enum_definition(t_enum* tenum, const string& enum_name) {
- render_rustdoc((t_doc*) tenum);
- f_gen_ << "#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]" << endl;
- f_gen_ << "pub enum " << enum_name << " {" << endl;
- indent_up();
-
- vector<t_enum_value*> constants = tenum->get_constants();
- vector<t_enum_value*>::iterator constants_iter;
- for (constants_iter = constants.begin(); constants_iter != constants.end(); ++constants_iter) {
- t_enum_value* val = (*constants_iter);
- render_rustdoc((t_doc*) val);
- f_gen_
- << indent()
- << rust_enum_variant_name(val->get_name())
- << " = "
- << val->get_value()
- << ","
- << endl;
- }
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_enum_impl(const string& enum_name) {
- f_gen_ << "impl " << enum_name << " {" << endl;
- indent_up();
-
- f_gen_
- << indent()
- << "pub fn write_to_out_protocol(&self, o_prot: &mut dyn TOutputProtocol) -> thrift::Result<()> {"
- << endl;
- indent_up();
- f_gen_ << indent() << "o_prot.write_i32(*self as i32)" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- f_gen_
- << indent()
- << "pub fn read_from_in_protocol(i_prot: &mut dyn TInputProtocol) -> thrift::Result<" << enum_name << "> {"
- << endl;
- indent_up();
-
- f_gen_ << indent() << "let enum_value = i_prot.read_i32()?;" << endl;
- f_gen_ << indent() << enum_name << "::try_from(enum_value)";
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_enum_conversion(t_enum* tenum, const string& enum_name) {
- f_gen_ << "impl TryFrom<i32> for " << enum_name << " {" << endl;
- indent_up();
-
- f_gen_ << indent() << "type Error = thrift::Error;";
-
- f_gen_ << indent() << "fn try_from(i: i32) -> Result<Self, Self::Error> {" << endl;
- indent_up();
-
- f_gen_ << indent() << "match i {" << endl;
- indent_up();
-
- vector<t_enum_value*> constants = tenum->get_constants();
- vector<t_enum_value*>::iterator constants_iter;
- for (constants_iter = constants.begin(); constants_iter != constants.end(); ++constants_iter) {
- t_enum_value* val = (*constants_iter);
- f_gen_
- << indent()
- << val->get_value()
- << " => Ok(" << enum_name << "::" << rust_enum_variant_name(val->get_name()) << "),"
- << endl;
- }
- f_gen_ << indent() << "_ => {" << endl;
- indent_up();
- render_thrift_error(
- "Protocol",
- "ProtocolError",
- "ProtocolErrorKind::InvalidData",
- "format!(\"cannot convert enum constant {} to " + enum_name + "\", i)"
- );
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-//-----------------------------------------------------------------------------
-//
-// Structs, Unions and Exceptions
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::generate_xception(t_struct* txception) {
- render_struct(rust_struct_name(txception), txception, t_rs_generator::T_EXCEPTION);
-}
-
-void t_rs_generator::generate_struct(t_struct* tstruct) {
- if (tstruct->is_union()) {
- render_union(tstruct);
- } else if (tstruct->is_struct()) {
- render_struct(rust_struct_name(tstruct), tstruct, t_rs_generator::T_REGULAR);
- } else {
- throw "cannot generate struct for exception";
- }
-}
-
-void t_rs_generator::render_struct(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
-) {
- render_type_comment(struct_name);
- render_struct_definition(struct_name, tstruct, struct_type);
- render_struct_impl(struct_name, tstruct, struct_type);
- if (struct_type == t_rs_generator::T_REGULAR || struct_type == t_rs_generator::T_EXCEPTION) {
- render_struct_default_trait_impl(struct_name, tstruct);
- }
- if (struct_type == t_rs_generator::T_EXCEPTION) {
- render_exception_struct_error_trait_impls(struct_name, tstruct);
- }
-}
-
-void t_rs_generator::render_struct_definition(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
-) {
- render_rustdoc((t_doc*) tstruct);
- f_gen_ << "#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]" << endl;
- f_gen_ << visibility_qualifier(struct_type) << "struct " << struct_name << " {" << endl;
-
- // render the members
- vector<t_field*> members = tstruct->get_sorted_members();
- if (!members.empty()) {
- indent_up();
-
- vector<t_field*>::iterator members_iter;
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = actual_field_req(member, struct_type);
-
- string rust_type = to_rust_type(member->get_type());
- rust_type = is_optional(member_req) ? "Option<" + rust_type + ">" : rust_type;
-
- render_rustdoc((t_doc*) member);
- f_gen_
- << indent()
- << visibility_qualifier(struct_type)
- << rust_field_name(member) << ": " << rust_type << ","
- << endl;
- }
-
- indent_down();
- }
-
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_exception_struct_error_trait_impls(const string& struct_name, t_struct* tstruct) {
- // error::Error trait
- f_gen_ << "impl Error for " << struct_name << " {" << endl;
- indent_up();
- f_gen_ << indent() << "fn description(&self) -> &str {" << endl;
- indent_up();
- f_gen_ << indent() << "\"" << "remote service threw " << tstruct->get_name() << "\"" << endl; // use *original* name
- indent_down();
- f_gen_ << indent() << "}" << endl;
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-
- // convert::From trait
- f_gen_ << "impl From<" << struct_name << "> for thrift::Error {" << endl;
- indent_up();
- f_gen_ << indent() << "fn from(e: " << struct_name << ") -> Self {" << endl;
- indent_up();
- f_gen_ << indent() << "thrift::Error::User(Box::new(e))" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-
- // fmt::Display trait
- f_gen_ << "impl Display for " << struct_name << " {" << endl;
- indent_up();
- f_gen_ << indent() << "fn fmt(&self, f: &mut Formatter) -> fmt::Result {" << endl;
- indent_up();
- f_gen_ << indent() << "self.description().fmt(f)" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_struct_default_trait_impl(const string& struct_name, t_struct* tstruct) {
- bool has_required_field = false;
-
- const vector<t_field*>& members = tstruct->get_sorted_members();
- vector<t_field*>::const_iterator members_iter;
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = *members_iter;
- if (!is_optional(member->get_req())) {
- has_required_field = true;
- break;
- }
- }
-
- if (has_required_field) {
- return;
- }
-
- f_gen_ << "impl Default for " << struct_name << " {" << endl;
- indent_up();
- f_gen_ << indent() << "fn default() -> Self {" << endl;
- indent_up();
-
- if (members.empty()) {
- f_gen_ << indent() << struct_name << "{}" << endl;
- } else {
- f_gen_ << indent() << struct_name << "{" << endl;
- indent_up();
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field *member = (*members_iter);
- string member_name(rust_field_name(member));
- f_gen_ << indent() << member_name << ": " << opt_in_req_out_value(member->get_type()) << "," << endl;
- }
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_struct_impl(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
-) {
- f_gen_ << "impl " << struct_name << " {" << endl;
- indent_up();
-
- if (struct_type == t_rs_generator::T_REGULAR || struct_type == t_rs_generator::T_EXCEPTION) {
- render_struct_constructor(struct_name, tstruct, struct_type);
- }
-
- render_struct_sync_read(struct_name, tstruct, struct_type);
- render_struct_sync_write(tstruct, struct_type);
-
- if (struct_type == t_rs_generator::T_RESULT) {
- render_result_struct_to_result_method(tstruct);
- }
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_struct_constructor(
- const string& struct_name,
- t_struct* tstruct,
- t_rs_generator::e_struct_type struct_type
-) {
- const vector<t_field*>& members = tstruct->get_sorted_members();
- vector<t_field*>::const_iterator members_iter;
-
- // build the convenience type parameters that allows us to pass unwrapped values to a constructor and
- // have them automatically converted into Option<value>
- bool first_arg = true;
-
- ostringstream generic_type_parameters;
- ostringstream generic_type_qualifiers;
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = actual_field_req(member, struct_type);
-
- if (is_optional(member_req)) {
- if (first_arg) {
- first_arg = false;
- } else {
- generic_type_parameters << ", ";
- generic_type_qualifiers << ", ";
- }
- generic_type_parameters << "F" << rust_safe_field_id(member->get_key());
- generic_type_qualifiers << "F" << rust_safe_field_id(member->get_key()) << ": Into<Option<" << to_rust_type(member->get_type()) << ">>";
- }
- }
-
- string type_parameter_string = generic_type_parameters.str();
- if (type_parameter_string.length() != 0) {
- type_parameter_string = "<" + type_parameter_string + ">";
- }
-
- string type_qualifier_string = generic_type_qualifiers.str();
- if (type_qualifier_string.length() != 0) {
- type_qualifier_string = "where " + type_qualifier_string + " ";
- }
-
- // now build the actual constructor arg list
- // when we're building this list we have to use the type parameters in place of the actual type names
- // if necessary
- ostringstream args;
- first_arg = true;
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = actual_field_req(member, struct_type);
- string member_name(rust_field_name(member));
-
- if (first_arg) {
- first_arg = false;
- } else {
- args << ", ";
- }
-
- if (is_optional(member_req)) {
- args << member_name << ": " << "F" << rust_safe_field_id(member->get_key());
- } else {
- args << member_name << ": " << to_rust_type(member->get_type());
- }
- }
-
- string arg_string = args.str();
-
- string visibility(visibility_qualifier(struct_type));
- f_gen_
- << indent()
- << visibility
- << "fn new"
- << type_parameter_string
- << "("
- << arg_string
- << ") -> "
- << struct_name
- << " "
- << type_qualifier_string
- << "{"
- << endl;
- indent_up();
-
- if (members.size() == 0) {
- f_gen_ << indent() << struct_name << " {}" << endl;
- } else {
- f_gen_ << indent() << struct_name << " {" << endl;
- indent_up();
-
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = actual_field_req(member, struct_type);
- string member_name(rust_field_name(member));
-
- if (is_optional(member_req)) {
- f_gen_ << indent() << member_name << ": " << member_name << ".into()," << endl;
- } else {
- f_gen_ << indent() << member_name << ": " << member_name << "," << endl;
- }
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_result_struct_to_result_method(t_struct* tstruct) {
- // we don't use the rust struct name in this method, just the service call name
- string service_call_name = tstruct->get_name();
-
- // check that we actually have a result
- size_t index = service_call_name.find(RESULT_STRUCT_SUFFIX, 0);
- if (index == std::string::npos) {
- throw "result struct " + service_call_name + " missing result suffix";
- } else {
- service_call_name.replace(index, 6, "");
- }
-
- const vector<t_field*>& members = tstruct->get_sorted_members();
- vector<t_field*>::const_iterator members_iter;
-
- // find out what the call's expected return type was
- string rust_return_type = "()";
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- if (member->get_name() == SERVICE_RESULT_VARIABLE) { // don't have to check safe name here
- rust_return_type = to_rust_type(member->get_type());
- break;
- }
- }
-
- // NOTE: ideally I would generate the branches and render them separately
- // I tried this however, and the resulting code was harder to understand
- // maintaining a rendered branch count (while a little ugly) got me the
- // rendering I wanted with code that was reasonably understandable
-
- f_gen_ << indent() << "fn ok_or(self) -> thrift::Result<" << rust_return_type << "> {" << endl;
- indent_up();
-
- int rendered_branch_count = 0;
-
- // render the exception branches
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* tfield = (*members_iter);
- if (tfield->get_name() != SERVICE_RESULT_VARIABLE) { // don't have to check safe name here
- string field_name("self." + rust_field_name(tfield));
- string branch_statement = rendered_branch_count == 0 ? "if" : "} else if";
-
- f_gen_ << indent() << branch_statement << " " << field_name << ".is_some() {" << endl;
- indent_up();
- f_gen_ << indent() << "Err(thrift::Error::User(Box::new(" << field_name << ".unwrap())))" << endl;
- indent_down();
-
- rendered_branch_count++;
- }
- }
-
- // render the return value branches
- if (rust_return_type == "()") {
- if (rendered_branch_count == 0) {
- // we have the unit return and this service call has no user-defined
- // exceptions. this means that we've a trivial return (happens with oneways)
- f_gen_ << indent() << "Ok(())" << endl;
- } else {
- // we have the unit return, but there are user-defined exceptions
- // if we've gotten this far then we have the default return (i.e. call successful)
- f_gen_ << indent() << "} else {" << endl;
- indent_up();
- f_gen_ << indent() << "Ok(())" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
- } else {
- string branch_statement = rendered_branch_count == 0 ? "if" : "} else if";
- f_gen_ << indent() << branch_statement << " self." << SERVICE_RESULT_VARIABLE << ".is_some() {" << endl;
- indent_up();
- f_gen_ << indent() << "Ok(self." << SERVICE_RESULT_VARIABLE << ".unwrap())" << endl;
- indent_down();
- f_gen_ << indent() << "} else {" << endl;
- indent_up();
- // if we haven't found a valid return value *or* a user exception
- // then we're in trouble; return a default error
- render_thrift_error(
- "Application",
- "ApplicationError",
- "ApplicationErrorKind::MissingResult",
- "\"no result received for " + service_call_name + "\""
- );
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_union(t_struct* tstruct) {
- string union_name(rust_struct_name(tstruct));
- render_type_comment(union_name);
- render_union_definition(union_name, tstruct);
- render_union_impl(union_name, tstruct);
-}
-
-void t_rs_generator::render_union_definition(const string& union_name, t_struct* tstruct) {
- const vector<t_field*>& members = tstruct->get_sorted_members();
- if (members.empty()) {
- throw "cannot generate rust enum with 0 members"; // may be valid thrift, but it's invalid rust
- }
-
- f_gen_ << "#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]" << endl;
- f_gen_ << "pub enum " << union_name << " {" << endl;
- indent_up();
-
- vector<t_field*>::const_iterator member_iter;
- for(member_iter = members.begin(); member_iter != members.end(); ++member_iter) {
- t_field* tfield = (*member_iter);
- f_gen_
- << indent()
- << rust_union_field_name(tfield)
- << "(" << to_rust_type(tfield->get_type()) << "),"
- << endl;
- }
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_union_impl(const string& union_name, t_struct* tstruct) {
- f_gen_ << "impl " << union_name << " {" << endl;
- indent_up();
-
- render_union_sync_read(union_name, tstruct);
- render_union_sync_write(union_name, tstruct);
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-//-----------------------------------------------------------------------------
-//
-// Sync Struct Write
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::render_struct_sync_write(
- t_struct *tstruct,
- t_rs_generator::e_struct_type struct_type
-) {
- f_gen_
- << indent()
- << visibility_qualifier(struct_type)
- << "fn write_to_out_protocol(&self, o_prot: &mut dyn TOutputProtocol) -> thrift::Result<()> {"
- << endl;
- indent_up();
-
- // write struct header to output protocol
- // note: use the *original* struct name here
- f_gen_ << indent() << "let struct_ident = TStructIdentifier::new(\"" + tstruct->get_name() + "\");" << endl;
- f_gen_ << indent() << "o_prot.write_struct_begin(&struct_ident)?;" << endl;
-
- // write struct members to output protocol
- vector<t_field*> members = tstruct->get_sorted_members();
- if (!members.empty()) {
- vector<t_field*>::iterator members_iter;
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = actual_field_req(member, struct_type);
- string member_var("self." + rust_field_name(member));
- render_struct_field_sync_write(member_var, false, member, member_req);
- }
- }
-
- // write struct footer to output protocol
- f_gen_ << indent() << "o_prot.write_field_stop()?;" << endl;
- f_gen_ << indent() << "o_prot.write_struct_end()" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_union_sync_write(const string &union_name, t_struct *tstruct) {
- f_gen_
- << indent()
- << "pub fn write_to_out_protocol(&self, o_prot: &mut dyn TOutputProtocol) -> thrift::Result<()> {"
- << endl;
- indent_up();
-
- // write struct header to output protocol
- // note: use the *original* struct name here
- f_gen_ << indent() << "let struct_ident = TStructIdentifier::new(\"" + tstruct->get_name() + "\");" << endl;
- f_gen_ << indent() << "o_prot.write_struct_begin(&struct_ident)?;" << endl;
-
- // write the enum field to the output protocol
- vector<t_field*> members = tstruct->get_sorted_members();
- if (!members.empty()) {
- f_gen_ << indent() << "match *self {" << endl;
- indent_up();
- vector<t_field*>::iterator members_iter;
- for(members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = t_field::T_REQUIRED;
- t_type* ttype = member->get_type();
- string match_var((ttype->is_base_type() && !ttype->is_string()) ? "f" : "ref f");
- f_gen_
- << indent()
- << union_name << "::" << rust_union_field_name(member)
- << "(" << match_var << ") => {"
- << endl;
- indent_up();
- render_struct_field_sync_write("f", true, member, member_req);
- indent_down();
- f_gen_ << indent() << "}," << endl;
- }
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
-
- // write struct footer to output protocol
- f_gen_ << indent() << "o_prot.write_field_stop()?;" << endl;
- f_gen_ << indent() << "o_prot.write_struct_end()" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_struct_field_sync_write(
- const string &field_var,
- bool field_var_is_ref,
- t_field *tfield,
- t_field::e_req req
-) {
- t_type* field_type = tfield->get_type();
- t_type* actual_type = get_true_type(field_type);
-
- ostringstream field_stream;
- field_stream
- << "TFieldIdentifier::new("
- << "\"" << tfield->get_name() << "\"" << ", " // note: use *original* name
- << to_rust_field_type_enum(field_type) << ", "
- << tfield->get_key() << ")";
- string field_ident_string = field_stream.str();
-
- if (is_optional(req)) {
- string let_var((actual_type->is_base_type() && !actual_type->is_string()) ? "fld_var" : "ref fld_var");
- f_gen_ << indent() << "if let Some(" << let_var << ") = " << field_var << " {" << endl;
- indent_up();
- f_gen_ << indent() << "o_prot.write_field_begin(&" << field_ident_string << ")?;" << endl;
- render_type_sync_write("fld_var", true, field_type);
- f_gen_ << indent() << "o_prot.write_field_end()?;" << endl;
- f_gen_ << indent() << "()" << endl; // FIXME: remove this extraneous '()'
- indent_down();
- f_gen_ << indent() << "} else {" << endl; // FIXME: remove else branch
- indent_up();
- /* FIXME: rethink how I deal with OPT_IN_REQ_OUT
- if (req == t_field::T_OPT_IN_REQ_OUT) {
- f_gen_ << indent() << "let field_ident = " << field_ident_string << ";" << endl;
- f_gen_ << indent() << "o_prot.write_field_begin(&field_ident)?;" << endl;
- f_gen_ << indent() << "o_prot.write_field_end()?;" << endl;
- }*/
- f_gen_ << indent() << "()" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- } else {
- f_gen_ << indent() << "o_prot.write_field_begin(&" << field_ident_string << ")?;" << endl;
- render_type_sync_write(field_var, field_var_is_ref, tfield->get_type());
- f_gen_ << indent() << "o_prot.write_field_end()?;" << endl;
- }
-}
-
-void t_rs_generator::render_type_sync_write(const string &type_var, bool type_var_is_ref, t_type *ttype) {
- if (ttype->is_base_type()) {
- t_base_type* tbase_type = (t_base_type*)ttype;
- switch (tbase_type->get_base()) {
- case t_base_type::TYPE_VOID:
- throw "cannot write field of type TYPE_VOID to output protocol";
- case t_base_type::TYPE_STRING: {
- string ref(type_var_is_ref ? "" : "&");
- if (tbase_type->is_binary()) {
- f_gen_ << indent() << "o_prot.write_bytes(" + ref + type_var + ")?;" << endl;
- } else {
- f_gen_ << indent() << "o_prot.write_string(" + ref + type_var + ")?;" << endl;
- }
- return;
- }
- case t_base_type::TYPE_BOOL:
- f_gen_ << indent() << "o_prot.write_bool(" + type_var + ")?;" << endl;
- return;
- case t_base_type::TYPE_I8:
- f_gen_ << indent() << "o_prot.write_i8(" + type_var + ")?;" << endl;
- return;
- case t_base_type::TYPE_I16:
- f_gen_ << indent() << "o_prot.write_i16(" + type_var + ")?;" << endl;
- return;
- case t_base_type::TYPE_I32:
- f_gen_ << indent() << "o_prot.write_i32(" + type_var + ")?;" << endl;
- return;
- case t_base_type::TYPE_I64:
- f_gen_ << indent() << "o_prot.write_i64(" + type_var + ")?;" << endl;
- return;
- case t_base_type::TYPE_DOUBLE:
- f_gen_ << indent() << "o_prot.write_double(" + type_var + ".into())?;" << endl;
- return;
- }
- } else if (ttype->is_typedef()) {
- t_typedef* ttypedef = (t_typedef*) ttype;
- render_type_sync_write(type_var, type_var_is_ref, ttypedef->get_type());
- return;
- } else if (ttype->is_enum() || ttype->is_struct() || ttype->is_xception()) {
- f_gen_ << indent() << type_var + ".write_to_out_protocol(o_prot)?;" << endl;
- return;
- } else if (ttype->is_map()) {
- render_map_sync_write(type_var, type_var_is_ref, (t_map *) ttype);
- return;
- } else if (ttype->is_set()) {
- render_set_sync_write(type_var, type_var_is_ref, (t_set *) ttype);
- return;
- } else if (ttype->is_list()) {
- render_list_sync_write(type_var, type_var_is_ref, (t_list *) ttype);
- return;
- }
-
- throw "cannot write unsupported type " + ttype->get_name();
-}
-
-void t_rs_generator::render_list_sync_write(const string &list_var, bool list_var_is_ref, t_list *tlist) {
- t_type* elem_type = tlist->get_elem_type();
-
- f_gen_
- << indent()
- << "o_prot.write_list_begin("
- << "&TListIdentifier::new("
- << to_rust_field_type_enum(elem_type) << ", "
- << list_var << ".len() as i32" << ")"
- << ")?;"
- << endl;
-
- string ref(list_var_is_ref ? "" : "&");
- f_gen_ << indent() << "for e in " << ref << list_var << " {" << endl;
- indent_up();
- render_type_sync_write(string_container_write_variable(elem_type, "e"), true, elem_type);
- f_gen_ << indent() << "o_prot.write_list_end()?;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_set_sync_write(const string &set_var, bool set_var_is_ref, t_set *tset) {
- t_type* elem_type = tset->get_elem_type();
-
- f_gen_
- << indent()
- << "o_prot.write_set_begin("
- << "&TSetIdentifier::new("
- << to_rust_field_type_enum(elem_type) << ", "
- << set_var << ".len() as i32" << ")"
- << ")?;"
- << endl;
-
- string ref(set_var_is_ref ? "" : "&");
- f_gen_ << indent() << "for e in " << ref << set_var << " {" << endl;
- indent_up();
- render_type_sync_write(string_container_write_variable(elem_type, "e"), true, elem_type);
- f_gen_ << indent() << "o_prot.write_set_end()?;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_map_sync_write(const string &map_var, bool map_var_is_ref, t_map *tmap) {
- t_type* key_type = tmap->get_key_type();
- t_type* val_type = tmap->get_val_type();
-
- f_gen_
- << indent()
- << "o_prot.write_map_begin("
- << "&TMapIdentifier::new("
- << to_rust_field_type_enum(key_type) << ", "
- << to_rust_field_type_enum(val_type) << ", "
- << map_var << ".len() as i32)"
- << ")?;"
- << endl;
-
- string ref(map_var_is_ref ? "" : "&");
- f_gen_ << indent() << "for (k, v) in " << ref << map_var << " {" << endl;
- indent_up();
- render_type_sync_write(string_container_write_variable(key_type, "k"), true, key_type);
- render_type_sync_write(string_container_write_variable(val_type, "v"), true, val_type);
- f_gen_ << indent() << "o_prot.write_map_end()?;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-string t_rs_generator::string_container_write_variable(t_type* ttype, const string& base_var) {
- bool type_needs_deref = needs_deref_on_container_write(ttype);
- bool type_is_double = is_double(ttype);
-
- string write_variable;
-
- if (type_is_double && type_needs_deref) {
- write_variable = "(*" + base_var + ")";
- } else if (type_needs_deref) {
- write_variable = "*" + base_var;
- } else {
- write_variable = base_var;
- }
-
- return write_variable;
-}
-
-bool t_rs_generator::needs_deref_on_container_write(t_type* ttype) {
- ttype = get_true_type(ttype);
- return ttype->is_base_type() && !ttype->is_string();
-}
-
-//-----------------------------------------------------------------------------
-//
-// Sync Struct Read
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::render_struct_sync_read(
- const string &struct_name,
- t_struct *tstruct, t_rs_generator::e_struct_type struct_type
-) {
- f_gen_
- << indent()
- << visibility_qualifier(struct_type)
- << "fn read_from_in_protocol(i_prot: &mut dyn TInputProtocol) -> thrift::Result<" << struct_name << "> {"
- << endl;
-
- indent_up();
-
- f_gen_ << indent() << "i_prot.read_struct_begin()?;" << endl;
-
- // create temporary variables: one for each field in the struct
- const vector<t_field*> members = tstruct->get_sorted_members();
- vector<t_field*>::const_iterator members_iter;
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- t_field::e_req member_req = actual_field_req(member, struct_type);
-
- f_gen_
- << indent()
- << "let mut " << struct_field_read_temp_variable(member)
- << ": Option<" << to_rust_type(member->get_type()) << "> = ";
- if (member_req == t_field::T_OPT_IN_REQ_OUT) {
- f_gen_ << opt_in_req_out_value(member->get_type()) << ";";
- } else {
- f_gen_ << "None;";
- }
- f_gen_ << endl;
- }
-
- // now loop through the fields we've received
- f_gen_ << indent() << "loop {" << endl; // start loop
- indent_up();
-
- // break out if you've found the Stop field
- f_gen_ << indent() << "let field_ident = i_prot.read_field_begin()?;" << endl;
- f_gen_ << indent() << "if field_ident.field_type == TType::Stop {" << endl;
- indent_up();
- f_gen_ << indent() << "break;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- // now read all the fields found
- f_gen_ << indent() << "let field_id = field_id(&field_ident)?;" << endl;
- f_gen_ << indent() << "match field_id {" << endl; // start match
- indent_up();
-
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* tfield = (*members_iter);
- f_gen_ << indent() << rust_safe_field_id(tfield->get_key()) << " => {" << endl;
- indent_up();
- render_type_sync_read("val", tfield->get_type());
- f_gen_ << indent() << struct_field_read_temp_variable(tfield) << " = Some(val);" << endl;
- indent_down();
- f_gen_ << indent() << "}," << endl;
- }
-
- // default case (skip fields)
- f_gen_ << indent() << "_ => {" << endl;
- indent_up();
- f_gen_ << indent() << "i_prot.skip(field_ident.field_type)?;" << endl;
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- indent_down();
- f_gen_ << indent() << "};" << endl; // finish match
- f_gen_ << indent() << "i_prot.read_field_end()?;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl; // finish loop
- f_gen_ << indent() << "i_prot.read_struct_end()?;" << endl; // read message footer from the wire
-
- // verify that all required fields exist
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* tfield = (*members_iter);
- t_field::e_req req = actual_field_req(tfield, struct_type);
- if (!is_optional(req)) {
- f_gen_
- << indent()
- << "verify_required_field_exists("
- << "\"" << struct_name << "." << rust_field_name(tfield) << "\""
- << ", "
- << "&" << struct_field_read_temp_variable(tfield)
- << ")?;" << endl;
- }
- }
-
- // construct the struct
- if (members.size() == 0) {
- f_gen_ << indent() << "let ret = " << struct_name << " {};" << endl;
- } else {
- f_gen_ << indent() << "let ret = " << struct_name << " {" << endl;
- indent_up();
-
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* tfield = (*members_iter);
- t_field::e_req req = actual_field_req(tfield, struct_type);
- string field_name(rust_field_name(tfield));
- string field_key = struct_field_read_temp_variable(tfield);
- if (is_optional(req)) {
- f_gen_ << indent() << field_name << ": " << field_key << "," << endl;
- } else {
- f_gen_
- << indent()
- << field_name
- << ": "
- << field_key
- << ".expect(\"auto-generated code should have checked for presence of required fields\")"
- << ","
- << endl;
- }
- }
-
- indent_down();
- f_gen_ << indent() << "};" << endl;
- }
-
- // return the constructed value
- f_gen_ << indent() << "Ok(ret)" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_union_sync_read(const string &union_name, t_struct *tstruct) {
- f_gen_
- << indent()
- << "pub fn read_from_in_protocol(i_prot: &mut dyn TInputProtocol) -> thrift::Result<" << union_name << "> {"
- << endl;
- indent_up();
-
- // create temporary variables to hold the
- // completed union as well as a count of fields read
- f_gen_ << indent() << "let mut ret: Option<" << union_name << "> = None;" << endl;
- f_gen_ << indent() << "let mut received_field_count = 0;" << endl;
-
- // read the struct preamble
- f_gen_ << indent() << "i_prot.read_struct_begin()?;" << endl;
-
- // now loop through the fields we've received
- f_gen_ << indent() << "loop {" << endl; // start loop
- indent_up();
-
- // break out if you've found the Stop field
- f_gen_ << indent() << "let field_ident = i_prot.read_field_begin()?;" << endl;
- f_gen_ << indent() << "if field_ident.field_type == TType::Stop {" << endl;
- indent_up();
- f_gen_ << indent() << "break;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- // now read all the fields found
- f_gen_ << indent() << "let field_id = field_id(&field_ident)?;" << endl;
- f_gen_ << indent() << "match field_id {" << endl; // start match
- indent_up();
-
- const vector<t_field*> members = tstruct->get_sorted_members();
- vector<t_field*>::const_iterator members_iter;
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- f_gen_ << indent() << rust_safe_field_id(member->get_key()) << " => {" << endl;
- indent_up();
- render_type_sync_read("val", member->get_type());
- f_gen_ << indent() << "if ret.is_none() {" << endl;
- indent_up();
- f_gen_
- << indent()
- << "ret = Some(" << union_name << "::" << rust_union_field_name(member) << "(val));"
- << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << indent() << "received_field_count += 1;" << endl;
- indent_down();
- f_gen_ << indent() << "}," << endl;
- }
-
- // default case (skip fields)
- f_gen_ << indent() << "_ => {" << endl;
- indent_up();
- f_gen_ << indent() << "i_prot.skip(field_ident.field_type)?;" << endl;
- f_gen_ << indent() << "received_field_count += 1;" << endl;
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- indent_down();
- f_gen_ << indent() << "};" << endl; // finish match
- f_gen_ << indent() << "i_prot.read_field_end()?;" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl; // finish loop
- f_gen_ << indent() << "i_prot.read_struct_end()?;" << endl; // finish reading message from wire
-
- // return the value or an error
- f_gen_ << indent() << "if received_field_count == 0 {" << endl;
- indent_up();
- render_thrift_error(
- "Protocol",
- "ProtocolError",
- "ProtocolErrorKind::InvalidData",
- "\"received empty union from remote " + union_name + "\""
- );
- indent_down();
- f_gen_ << indent() << "} else if received_field_count > 1 {" << endl;
- indent_up();
- render_thrift_error(
- "Protocol",
- "ProtocolError",
- "ProtocolErrorKind::InvalidData",
- "\"received multiple fields for union from remote " + union_name + "\""
- );
- indent_down();
- f_gen_ << indent() << "} else {" << endl;
- indent_up();
- f_gen_ << indent() << "Ok(ret.expect(\"return value should have been constructed\"))" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-// Construct the rust representation of all supported types from the wire.
-void t_rs_generator::render_type_sync_read(const string &type_var, t_type *ttype, bool is_boxed) {
- if (ttype->is_base_type()) {
- t_base_type* tbase_type = (t_base_type*)ttype;
- switch (tbase_type->get_base()) {
- case t_base_type::TYPE_VOID:
- throw "cannot read field of type TYPE_VOID from input protocol";
- case t_base_type::TYPE_STRING:
- if (tbase_type->is_binary()) {
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_bytes()?;" << endl;
- } else {
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_string()?;" << endl;
- }
- return;
- case t_base_type::TYPE_BOOL:
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_bool()?;" << endl;
- return;
- case t_base_type::TYPE_I8:
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_i8()?;" << endl;
- return;
- case t_base_type::TYPE_I16:
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_i16()?;" << endl;
- return;
- case t_base_type::TYPE_I32:
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_i32()?;" << endl;
- return;
- case t_base_type::TYPE_I64:
- f_gen_ << indent() << "let " << type_var << " = i_prot.read_i64()?;" << endl;
- return;
- case t_base_type::TYPE_DOUBLE:
- f_gen_ << indent() << "let " << type_var << " = OrderedFloat::from(i_prot.read_double()?);" << endl;
- return;
- }
- } else if (ttype->is_typedef()) {
- // FIXME: not a fan of separate `is_boxed` parameter
- // This is problematic because it's an optional parameter, and only comes
- // into play once. The core issue is that I lose an important piece of type
- // information (whether the type is a fwd ref) by unwrapping the typedef'd
- // type and making the recursive call using it. I can't modify or wrap the
- // generated string after the fact because it's written directly into the file,
- // so I have to pass this parameter along. Going with this approach because it
- // seems like the lowest-cost option to easily support recursive types.
- t_typedef* ttypedef = (t_typedef*)ttype;
- render_type_sync_read(type_var, ttypedef->get_type(), ttypedef->is_forward_typedef());
- return;
- } else if (ttype->is_enum() || ttype->is_struct() || ttype->is_xception()) {
- string read_call(to_rust_type(ttype) + "::read_from_in_protocol(i_prot)?");
- read_call = is_boxed ? "Box::new(" + read_call + ")" : read_call;
- f_gen_
- << indent()
- << "let " << type_var << " = " << read_call << ";"
- << endl;
- return;
- } else if (ttype->is_map()) {
- render_map_sync_read((t_map *) ttype, type_var);
- return;
- } else if (ttype->is_set()) {
- render_set_sync_read((t_set *) ttype, type_var);
- return;
- } else if (ttype->is_list()) {
- render_list_sync_read((t_list *) ttype, type_var);
- return;
- }
-
- throw "cannot read unsupported type " + ttype->get_name();
-}
-
-// Construct the rust representation of a list from the wire.
-void t_rs_generator::render_list_sync_read(t_list *tlist, const string &list_var) {
- t_type* elem_type = tlist->get_elem_type();
-
- f_gen_ << indent() << "let list_ident = i_prot.read_list_begin()?;" << endl;
- f_gen_
- << indent()
- << "let mut " << list_var << ": " << to_rust_type((t_type*) tlist)
- << " = Vec::with_capacity(list_ident.size as usize);"
- << endl;
- f_gen_ << indent() << "for _ in 0..list_ident.size {" << endl;
-
- indent_up();
-
- string list_elem_var = tmp("list_elem_");
- render_type_sync_read(list_elem_var, elem_type);
- f_gen_ << indent() << list_var << ".push(" << list_elem_var << ");" << endl;
-
- indent_down();
-
- f_gen_ << indent() << "}" << endl;
- f_gen_ << indent() << "i_prot.read_list_end()?;" << endl;
-}
-
-// Construct the rust representation of a set from the wire.
-void t_rs_generator::render_set_sync_read(t_set *tset, const string &set_var) {
- t_type* elem_type = tset->get_elem_type();
-
- f_gen_ << indent() << "let set_ident = i_prot.read_set_begin()?;" << endl;
- f_gen_
- << indent()
- << "let mut " << set_var << ": " << to_rust_type((t_type*) tset)
- << " = BTreeSet::new();"
- << endl;
- f_gen_ << indent() << "for _ in 0..set_ident.size {" << endl;
-
- indent_up();
-
- string set_elem_var = tmp("set_elem_");
- render_type_sync_read(set_elem_var, elem_type);
- f_gen_ << indent() << set_var << ".insert(" << set_elem_var << ");" << endl;
-
- indent_down();
-
- f_gen_ << indent() << "}" << endl;
- f_gen_ << indent() << "i_prot.read_set_end()?;" << endl;
-}
-
-// Construct the rust representation of a map from the wire.
-void t_rs_generator::render_map_sync_read(t_map *tmap, const string &map_var) {
- t_type* key_type = tmap->get_key_type();
- t_type* val_type = tmap->get_val_type();
-
- f_gen_ << indent() << "let map_ident = i_prot.read_map_begin()?;" << endl;
- f_gen_
- << indent()
- << "let mut " << map_var << ": " << to_rust_type((t_type*) tmap)
- << " = BTreeMap::new();"
- << endl;
- f_gen_ << indent() << "for _ in 0..map_ident.size {" << endl;
-
- indent_up();
-
- string key_elem_var = tmp("map_key_");
- render_type_sync_read(key_elem_var, key_type);
- string val_elem_var = tmp("map_val_");
- render_type_sync_read(val_elem_var, val_type);
- f_gen_ << indent() << map_var << ".insert(" << key_elem_var << ", " << val_elem_var << ");" << endl;
-
- indent_down();
-
- f_gen_ << indent() << "}" << endl;
- f_gen_ << indent() << "i_prot.read_map_end()?;" << endl;
-}
-
-string t_rs_generator::struct_field_read_temp_variable(t_field* tfield) {
- std::ostringstream foss;
- foss << "f_" << rust_safe_field_id(tfield->get_key());
- return foss.str();
-}
-
-//-----------------------------------------------------------------------------
-//
-// Sync Client
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::generate_service(t_service* tservice) {
- render_sync_client(tservice);
- render_sync_processor(tservice);
- render_service_call_structs(tservice);
-}
-
-void t_rs_generator::render_service_call_structs(t_service* tservice) {
- const std::vector<t_function*> functions = tservice->get_functions();
- std::vector<t_function*>::const_iterator func_iter;
-
- // thrift args for service calls are packed
- // into a struct that's transmitted over the wire, so
- // generate structs for those too
- //
- // thrift returns are *also* packed into a struct
- // that's passed over the wire, so, generate the struct
- // for that too. Note that this result struct *also*
- // contains the exceptions as well
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* tfunc = (*func_iter);
- render_service_call_args_struct(tfunc);
- if (!tfunc->is_oneway()) {
- render_service_call_result_value_struct(tfunc);
- }
- }
-}
-
-void t_rs_generator::render_sync_client(t_service* tservice) {
- string client_impl_name(rust_sync_client_impl_name(tservice));
-
- render_type_comment(tservice->get_name() + " service client"); // note: use *original* name
- render_sync_client_trait(tservice);
- render_sync_client_marker_trait(tservice);
- render_sync_client_definition_and_impl(client_impl_name);
- render_sync_client_tthriftclient_impl(client_impl_name);
- render_sync_client_marker_trait_impls(tservice, client_impl_name); f_gen_ << endl;
- render_sync_client_process_impl(tservice);
-}
-
-void t_rs_generator::render_sync_client_trait(t_service *tservice) {
- string extension = "";
- if (tservice->get_extends()) {
- t_service* extends = tservice->get_extends();
- extension = " : " + rust_namespace(extends) + rust_sync_client_trait_name(extends);
- }
-
- render_rustdoc((t_doc*) tservice);
- f_gen_ << "pub trait " << rust_sync_client_trait_name(tservice) << extension << " {" << endl;
- indent_up();
-
- const std::vector<t_function*> functions = tservice->get_functions();
- std::vector<t_function*>::const_iterator func_iter;
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* tfunc = (*func_iter);
- string func_name = service_call_client_function_name(tfunc);
- string func_args = rust_sync_service_call_declaration(tfunc, true);
- string func_return = to_rust_type(tfunc->get_returntype());
- render_rustdoc((t_doc*) tfunc);
- f_gen_ << indent() << "fn " << func_name << func_args << " -> thrift::Result<" << func_return << ">;" << endl;
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_sync_client_marker_trait(t_service *tservice) {
- f_gen_ << indent() << "pub trait " << rust_sync_client_marker_trait_name(tservice) << " {}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_sync_client_marker_trait_impls(t_service *tservice, const string &impl_struct_name) {
- f_gen_
- << indent()
- << "impl "
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " "
- << rust_namespace(tservice) << rust_sync_client_marker_trait_name(tservice)
- << " for "
- << impl_struct_name << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " "
- << SYNC_CLIENT_GENERIC_BOUNDS
- << " {}"
- << endl;
-
- t_service* extends = tservice->get_extends();
- if (extends) {
- render_sync_client_marker_trait_impls(extends, impl_struct_name);
- }
-}
-
-void t_rs_generator::render_sync_client_definition_and_impl(const string& client_impl_name) {
-
- // render the definition for the client struct
- f_gen_
- << "pub struct "
- << client_impl_name
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " "
- << SYNC_CLIENT_GENERIC_BOUNDS
- << " {"
- << endl;
- indent_up();
- f_gen_ << indent() << "_i_prot: IP," << endl;
- f_gen_ << indent() << "_o_prot: OP," << endl;
- f_gen_ << indent() << "_sequence_number: i32," << endl;
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-
- // render the struct implementation
- // this includes the new() function as well as the helper send/recv methods for each service call
- f_gen_
- << "impl "
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " "
- << client_impl_name
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " "
- << SYNC_CLIENT_GENERIC_BOUNDS
- << " {"
- << endl;
- indent_up();
- render_sync_client_lifecycle_functions(client_impl_name);
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_sync_client_lifecycle_functions(const string& client_struct) {
- f_gen_
- << indent()
- << "pub fn new(input_protocol: IP, output_protocol: OP) -> "
- << client_struct
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " {"
- << endl;
- indent_up();
-
- f_gen_
- << indent()
- << client_struct
- << " { _i_prot: input_protocol, _o_prot: output_protocol, _sequence_number: 0 }"
- << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_sync_client_tthriftclient_impl(const string &client_impl_name) {
- f_gen_
- << indent()
- << "impl "
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " TThriftClient for "
- << client_impl_name
- << SYNC_CLIENT_GENERIC_BOUND_VARS
- << " "
- << SYNC_CLIENT_GENERIC_BOUNDS
- << " {" << endl;
- indent_up();
-
- f_gen_ << indent() << "fn i_prot_mut(&mut self) -> &mut dyn TInputProtocol { &mut self._i_prot }" << endl;
- f_gen_ << indent() << "fn o_prot_mut(&mut self) -> &mut dyn TOutputProtocol { &mut self._o_prot }" << endl;
- f_gen_ << indent() << "fn sequence_number(&self) -> i32 { self._sequence_number }" << endl;
- f_gen_
- << indent()
- << "fn increment_sequence_number(&mut self) -> i32 { self._sequence_number += 1; self._sequence_number }"
- << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_sync_client_process_impl(t_service* tservice) {
- string marker_extension = "" + sync_client_marker_traits_for_extension(tservice);
-
- f_gen_
- << "impl <C: TThriftClient + " << rust_sync_client_marker_trait_name(tservice) << marker_extension << "> "
- << rust_sync_client_trait_name(tservice)
- << " for C {" << endl;
- indent_up();
-
- const std::vector<t_function*> functions = tservice->get_functions();
- std::vector<t_function*>::const_iterator func_iter;
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* func = (*func_iter);
- render_sync_send_recv_wrapper(func);
- }
-
- indent_down();
- f_gen_ << "}" << endl;
- f_gen_ << endl;
-}
-
-string t_rs_generator::sync_client_marker_traits_for_extension(t_service *tservice) {
- string marker_extension;
-
- t_service* extends = tservice->get_extends();
- if (extends) {
- marker_extension = " + " + rust_namespace(extends) + rust_sync_client_marker_trait_name(extends);
- marker_extension = marker_extension + sync_client_marker_traits_for_extension(extends);
- }
-
- return marker_extension;
-}
-
-void t_rs_generator::render_sync_send_recv_wrapper(t_function* tfunc) {
- string func_name = service_call_client_function_name(tfunc);
- string func_decl_args = rust_sync_service_call_declaration(tfunc, true);
- string func_call_args = rust_sync_service_call_invocation(tfunc);
- string func_return = to_rust_type(tfunc->get_returntype());
-
- f_gen_
- << indent()
- << "fn " << func_name << func_decl_args << " -> thrift::Result<" << func_return
- << "> {"
- << endl;
- indent_up();
-
- f_gen_ << indent() << "(" << endl;
- indent_up();
- render_sync_send(tfunc);
- indent_down();
- f_gen_ << indent() << ")?;" << endl;
- if (tfunc->is_oneway()) {
- f_gen_ << indent() << "Ok(())" << endl;
- } else {
- render_sync_recv(tfunc);
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_sync_send(t_function* tfunc) {
- f_gen_ << indent() << "{" << endl;
- indent_up();
-
- // increment the sequence number and generate the call header
- string message_type = tfunc->is_oneway() ? "TMessageType::OneWay" : "TMessageType::Call";
- f_gen_ << indent() << "self.increment_sequence_number();" << endl;
- f_gen_
- << indent()
- << "let message_ident = "
- << "TMessageIdentifier::new(\"" << tfunc->get_name() << "\", " // note: use *original* name
- << message_type << ", "
- << "self.sequence_number());"
- << endl;
- // pack the arguments into the containing struct that we'll write out over the wire
- // note that this struct is generated even if we have 0 args
- ostringstream struct_definition;
- vector<t_field*> members = tfunc->get_arglist()->get_sorted_members();
- vector<t_field*>::iterator members_iter;
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* member = (*members_iter);
- string member_name(rust_field_name(member));
- struct_definition << member_name << ": " << member_name << ", ";
- }
- string struct_fields = struct_definition.str();
- if (struct_fields.size() > 0) {
- struct_fields = struct_fields.substr(0, struct_fields.size() - 2); // strip trailing comma
- }
- f_gen_
- << indent()
- << "let call_args = "
- << service_call_args_struct_name(tfunc)
- << " { "
- << struct_fields
- << " };"
- << endl;
- // write everything over the wire
- f_gen_ << indent() << "self.o_prot_mut().write_message_begin(&message_ident)?;" << endl;
- f_gen_ << indent() << "call_args.write_to_out_protocol(self.o_prot_mut())?;" << endl; // written even if we have 0 args
- f_gen_ << indent() << "self.o_prot_mut().write_message_end()?;" << endl;
- f_gen_ << indent() << "self.o_prot_mut().flush()" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_sync_recv(t_function* tfunc) {
- f_gen_ << indent() << "{" << endl;
- indent_up();
-
- f_gen_ << indent() << "let message_ident = self.i_prot_mut().read_message_begin()?;" << endl;
- f_gen_ << indent() << "verify_expected_sequence_number(self.sequence_number(), message_ident.sequence_number)?;" << endl;
- f_gen_ << indent() << "verify_expected_service_call(\"" << tfunc->get_name() <<"\", &message_ident.name)?;" << endl; // note: use *original* name
- // FIXME: replace with a "try" block
- f_gen_ << indent() << "if message_ident.message_type == TMessageType::Exception {" << endl;
- indent_up();
- f_gen_ << indent() << "let remote_error = thrift::Error::read_application_error_from_in_protocol(self.i_prot_mut())?;" << endl;
- f_gen_ << indent() << "self.i_prot_mut().read_message_end()?;" << endl;
- f_gen_ << indent() << "return Err(thrift::Error::Application(remote_error))" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << indent() << "verify_expected_message_type(TMessageType::Reply, message_ident.message_type)?;" << endl;
- f_gen_ << indent() << "let result = " << service_call_result_struct_name(tfunc) << "::read_from_in_protocol(self.i_prot_mut())?;" << endl;
- f_gen_ << indent() << "self.i_prot_mut().read_message_end()?;" << endl;
- f_gen_ << indent() << "result.ok_or()" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-string t_rs_generator::rust_sync_service_call_declaration(t_function* tfunc, bool self_is_mutable) {
- ostringstream func_args;
-
- if (self_is_mutable) {
- func_args << "(&mut self";
- } else {
- func_args << "(&self";
- }
-
- if (has_args(tfunc)) {
- func_args << ", "; // put comma after "self"
- func_args << struct_to_declaration(tfunc->get_arglist(), T_ARGS);
- }
-
- func_args << ")";
- return func_args.str();
-}
-
-string t_rs_generator::rust_sync_service_call_invocation(t_function* tfunc, const string& field_prefix) {
- ostringstream func_args;
- func_args << "(";
-
- if (has_args(tfunc)) {
- func_args << struct_to_invocation(tfunc->get_arglist(), field_prefix);
- }
-
- func_args << ")";
- return func_args.str();
-}
-
-string t_rs_generator::struct_to_declaration(t_struct* tstruct, t_rs_generator::e_struct_type struct_type) {
- ostringstream args;
-
- bool first_arg = true;
- std::vector<t_field*> fields = tstruct->get_sorted_members();
- std::vector<t_field*>::iterator field_iter;
- for (field_iter = fields.begin(); field_iter != fields.end(); ++field_iter) {
- t_field* tfield = (*field_iter);
- t_field::e_req field_req = actual_field_req(tfield, struct_type);
- string rust_type = to_rust_type(tfield->get_type());
- rust_type = is_optional(field_req) ? "Option<" + rust_type + ">" : rust_type;
-
- if (first_arg) {
- first_arg = false;
- } else {
- args << ", ";
- }
-
- args << rust_field_name(tfield) << ": " << rust_type;
- }
-
- return args.str();
-}
-
-string t_rs_generator::struct_to_invocation(t_struct* tstruct, const string& field_prefix) {
- ostringstream args;
-
- bool first_arg = true;
- std::vector<t_field*> fields = tstruct->get_sorted_members();
- std::vector<t_field*>::iterator field_iter;
- for (field_iter = fields.begin(); field_iter != fields.end(); ++field_iter) {
- t_field* tfield = (*field_iter);
-
- if (first_arg) {
- first_arg = false;
- } else {
- args << ", ";
- }
-
- args << field_prefix << rust_field_name(tfield);
- }
-
- return args.str();
-}
-
-void t_rs_generator::render_service_call_args_struct(t_function* tfunc) {
- string args_struct_name(service_call_args_struct_name(tfunc));
- render_struct(args_struct_name, tfunc->get_arglist(), t_rs_generator::T_ARGS);
-}
-
-void t_rs_generator::render_service_call_result_value_struct(t_function* tfunc) {
- string result_struct_name = service_call_result_struct_name(tfunc);
- t_struct result(program_, result_struct_name);
-
- t_field return_value(tfunc->get_returntype(), SERVICE_RESULT_VARIABLE, 0);
- return_value.set_req(t_field::T_OPTIONAL);
- if (!tfunc->get_returntype()->is_void()) {
- result.append(&return_value);
- }
-
- t_struct* exceptions = tfunc->get_xceptions();
- const vector<t_field*>& exception_types = exceptions->get_members();
- vector<t_field*>::const_iterator exception_iter;
- for(exception_iter = exception_types.begin(); exception_iter != exception_types.end(); ++exception_iter) {
- t_field* exception_type = *exception_iter;
- exception_type->set_req(t_field::T_OPTIONAL);
- result.append(exception_type);
- }
-
- render_struct(result_struct_name, &result, t_rs_generator::T_RESULT);
-}
-
-//-----------------------------------------------------------------------------
-//
-// Sync Processor
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::render_sync_processor(t_service *tservice) {
- render_type_comment(tservice->get_name() + " service processor"); // note: use *original* name
- render_sync_handler_trait(tservice);
- render_sync_processor_definition_and_impl(tservice);
-}
-
-void t_rs_generator::render_sync_handler_trait(t_service *tservice) {
- string extension = "";
- if (tservice->get_extends() != NULL) {
- t_service* extends = tservice->get_extends();
- extension = " : " + rust_namespace(extends) + rust_sync_handler_trait_name(extends);
- }
-
- const std::vector<t_function*> functions = tservice->get_functions();
- std::vector<t_function*>::const_iterator func_iter;
-
- render_rustdoc((t_doc*) tservice);
- f_gen_ << "pub trait " << rust_sync_handler_trait_name(tservice) << extension << " {" << endl;
- indent_up();
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* tfunc = (*func_iter);
- string func_name = service_call_handler_function_name(tfunc);
- string func_args = rust_sync_service_call_declaration(tfunc, false);
- string func_return = to_rust_type(tfunc->get_returntype());
- render_rustdoc((t_doc*) tfunc);
- f_gen_
- << indent()
- << "fn "
- << func_name << func_args
- << " -> thrift::Result<" << func_return << ">;"
- << endl;
- }
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_sync_processor_definition_and_impl(t_service *tservice) {
- string service_processor_name = rust_sync_processor_name(tservice);
- string handler_trait_name = rust_sync_handler_trait_name(tservice);
-
- // struct
- f_gen_
- << indent()
- << "pub struct " << service_processor_name
- << "<H: " << handler_trait_name
- << "> {"
- << endl;
- indent_up();
- f_gen_ << indent() << "handler: H," << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-
- // delegating impl
- f_gen_
- << indent()
- << "impl <H: " << handler_trait_name << "> "
- << service_processor_name
- << "<H> {"
- << endl;
- indent_up();
- f_gen_ << indent() << "pub fn new(handler: H) -> " << service_processor_name << "<H> {" << endl;
- indent_up();
- f_gen_ << indent() << service_processor_name << " {" << endl;
- indent_up();
- f_gen_ << indent() << "handler," << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- indent_down();
- f_gen_ << indent() << "}" << endl;
- render_sync_process_delegation_functions(tservice);
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-
- // actual impl
- string service_actual_processor_name = rust_sync_processor_impl_name(tservice);
- f_gen_ << indent() << "pub struct " << service_actual_processor_name << ";" << endl;
- f_gen_ << endl;
- f_gen_ << indent() << "impl " << service_actual_processor_name << " {" << endl;
- indent_up();
-
- vector<t_function*> functions = tservice->get_functions();
- vector<t_function*>::iterator func_iter;
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* tfunc = (*func_iter);
- render_sync_process_function(tfunc, handler_trait_name);
- }
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-
- // processor impl
- f_gen_
- << indent()
- << "impl <H: "
- << handler_trait_name << "> TProcessor for "
- << service_processor_name
- << "<H> {"
- << endl;
- indent_up();
-
- f_gen_
- << indent()
- << "fn process(&self, i_prot: &mut dyn TInputProtocol, o_prot: &mut dyn TOutputProtocol) -> thrift::Result<()> {"
- << endl;
- indent_up();
-
- f_gen_ << indent() << "let message_ident = i_prot.read_message_begin()?;" << endl;
-
- f_gen_ << indent() << "let res = match &*message_ident.name {" << endl; // [sigh] explicit deref coercion
- indent_up();
- render_process_match_statements(tservice);
- f_gen_ << indent() << "method => {" << endl;
- indent_up();
- render_thrift_error(
- "Application",
- "ApplicationError",
- "ApplicationErrorKind::UnknownMethod",
- "format!(\"unknown method {}\", method)"
- );
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- indent_down();
- f_gen_ << indent() << "};" << endl;
- f_gen_ << indent() << "thrift::server::handle_process_result(&message_ident, res, o_prot)" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- f_gen_ << endl;
-}
-
-void t_rs_generator::render_sync_process_delegation_functions(t_service *tservice) {
- string actual_processor(rust_namespace(tservice) + rust_sync_processor_impl_name(tservice));
-
- vector<t_function*> functions = tservice->get_functions();
- vector<t_function*>::iterator func_iter;
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* tfunc = (*func_iter);
- string function_name("process_" + rust_snake_case(tfunc->get_name()));
- f_gen_
- << indent()
- << "fn " << function_name
- << "(&self, "
- << "incoming_sequence_number: i32, "
- << "i_prot: &mut dyn TInputProtocol, "
- << "o_prot: &mut dyn TOutputProtocol) "
- << "-> thrift::Result<()> {"
- << endl;
- indent_up();
-
- f_gen_
- << indent()
- << actual_processor
- << "::" << function_name
- << "("
- << "&self.handler, "
- << "incoming_sequence_number, "
- << "i_prot, "
- << "o_prot"
- << ")"
- << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
- }
-
- t_service* extends = tservice->get_extends();
- if (extends) {
- render_sync_process_delegation_functions(extends);
- }
-}
-
-void t_rs_generator::render_process_match_statements(t_service* tservice) {
- vector<t_function*> functions = tservice->get_functions();
- vector<t_function*>::iterator func_iter;
- for(func_iter = functions.begin(); func_iter != functions.end(); ++func_iter) {
- t_function* tfunc = (*func_iter);
- f_gen_ << indent() << "\"" << tfunc->get_name() << "\"" << " => {" << endl; // note: use *original* name
- indent_up();
- f_gen_
- << indent()
- << "self.process_" << rust_snake_case(tfunc->get_name())
- << "(message_ident.sequence_number, i_prot, o_prot)"
- << endl;
- indent_down();
- f_gen_ << indent() << "}," << endl;
- }
-
- t_service* extends = tservice->get_extends();
- if (extends) {
- render_process_match_statements(extends);
- }
-}
-
-void t_rs_generator::render_sync_process_function(t_function *tfunc, const string &handler_type) {
- string sequence_number_param("incoming_sequence_number");
- string output_protocol_param("o_prot");
-
- if (tfunc->is_oneway()) {
- sequence_number_param = "_";
- output_protocol_param = "_";
- }
-
- f_gen_
- << indent()
- << "pub fn process_" << rust_snake_case(tfunc->get_name())
- << "<H: " << handler_type << ">"
- << "(handler: &H, "
- << sequence_number_param << ": i32, "
- << "i_prot: &mut dyn TInputProtocol, "
- << output_protocol_param << ": &mut dyn TOutputProtocol) "
- << "-> thrift::Result<()> {"
- << endl;
-
- indent_up();
-
- // *always* read arguments from the input protocol
- f_gen_
- << indent()
- << "let "
- << (has_non_void_args(tfunc) ? "args" : "_")
- << " = "
- << service_call_args_struct_name(tfunc)
- << "::read_from_in_protocol(i_prot)?;"
- << endl;
-
- f_gen_
- << indent()
- << "match handler."
- << service_call_handler_function_name(tfunc)
- << rust_sync_service_call_invocation(tfunc, "args.")
- << " {"
- << endl; // start match
- indent_up();
-
- // handler succeeded
- string handler_return_variable = tfunc->is_oneway() || tfunc->get_returntype()->is_void() ? "_" : "handler_return";
- f_gen_ << indent() << "Ok(" << handler_return_variable << ") => {" << endl;
- indent_up();
- render_sync_handler_succeeded(tfunc);
- indent_down();
- f_gen_ << indent() << "}," << endl;
- // handler failed
- f_gen_ << indent() << "Err(e) => {" << endl;
- indent_up();
- render_sync_handler_failed(tfunc);
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl; // end match
-
- indent_down();
- f_gen_ << indent() << "}" << endl; // end function
-}
-
-void t_rs_generator::render_sync_handler_succeeded(t_function *tfunc) {
- if (tfunc->is_oneway()) {
- f_gen_ << indent() << "Ok(())" << endl;
- } else {
- f_gen_
- << indent()
- << "let message_ident = TMessageIdentifier::new("
- << "\"" << tfunc->get_name() << "\", " // note: use *original* name
- << "TMessageType::Reply, "
- << "incoming_sequence_number);"
- << endl;
- f_gen_ << indent() << "o_prot.write_message_begin(&message_ident)?;" << endl;
- f_gen_ << indent() << "let ret = " << handler_successful_return_struct(tfunc) <<";" << endl;
- f_gen_ << indent() << "ret.write_to_out_protocol(o_prot)?;" << endl;
- f_gen_ << indent() << "o_prot.write_message_end()?;" << endl;
- f_gen_ << indent() << "o_prot.flush()" << endl;
- }
-}
-
-void t_rs_generator::render_sync_handler_failed(t_function *tfunc) {
- string err_var("e");
-
- f_gen_ << indent() << "match " << err_var << " {" << endl;
- indent_up();
-
- // if there are any user-defined exceptions for this service call handle them first
- if (tfunc->get_xceptions() != NULL && tfunc->get_xceptions()->get_sorted_members().size() > 0) {
- string user_err_var("usr_err");
- f_gen_ << indent() << "thrift::Error::User(" << user_err_var << ") => {" << endl;
- indent_up();
- render_sync_handler_failed_user_exception_branch(tfunc);
- indent_down();
- f_gen_ << indent() << "}," << endl;
- }
-
- // application error
- string app_err_var("app_err");
- f_gen_ << indent() << "thrift::Error::Application(" << app_err_var << ") => {" << endl;
- indent_up();
- render_sync_handler_failed_application_exception_branch(tfunc, app_err_var);
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- // default case
- f_gen_ << indent() << "_ => {" << endl;
- indent_up();
- render_sync_handler_failed_default_exception_branch(tfunc);
- indent_down();
- f_gen_ << indent() << "}," << endl;
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_sync_handler_failed_user_exception_branch(t_function *tfunc) {
- if (tfunc->get_xceptions() == NULL || tfunc->get_xceptions()->get_sorted_members().empty()) {
- throw "cannot render user exception branches if no user exceptions defined";
- }
-
- const vector<t_field*> txceptions = tfunc->get_xceptions()->get_sorted_members();
- vector<t_field*>::const_iterator xception_iter;
- int branches_rendered = 0;
-
- // run through all user-defined exceptions
- for (xception_iter = txceptions.begin(); xception_iter != txceptions.end(); ++xception_iter) {
- t_field* xception_field = (*xception_iter);
-
- string if_statement(branches_rendered == 0 ? "if usr_err" : "} else if usr_err");
- string exception_type(to_rust_type(xception_field->get_type()));
- f_gen_ << indent() << if_statement << ".downcast_ref::<" << exception_type << ">().is_some() {" << endl;
- indent_up();
-
- f_gen_
- << indent()
- << "let err = usr_err.downcast::<" << exception_type << ">().expect(\"downcast already checked\");"
- << endl;
-
- // render the members of the return struct
- ostringstream members;
-
- bool has_result_variable = !(tfunc->is_oneway() || tfunc->get_returntype()->is_void());
- if (has_result_variable) {
- members << SERVICE_RESULT_VARIABLE << ": None, ";
- }
-
- vector<t_field*>::const_iterator xception_members_iter;
- for(xception_members_iter = txceptions.begin(); xception_members_iter != txceptions.end(); ++xception_members_iter) {
- t_field* member = (*xception_members_iter);
- string member_name(rust_field_name(member));
- if (member == xception_field) {
- members << member_name << ": Some(*err), ";
- } else {
- members << member_name << ": None, ";
- }
- }
-
- string member_string = members.str();
- member_string.replace(member_string.size() - 2, 2, " "); // trim trailing comma
-
- // now write out the return struct
- f_gen_
- << indent()
- << "let ret_err = "
- << service_call_result_struct_name(tfunc)
- << "{ " << member_string << "};"
- << endl;
-
- f_gen_
- << indent()
- << "let message_ident = "
- << "TMessageIdentifier::new("
- << "\"" << tfunc->get_name() << "\", " // note: use *original* name
- << "TMessageType::Reply, "
- << "incoming_sequence_number);"
- << endl;
- f_gen_ << indent() << "o_prot.write_message_begin(&message_ident)?;" << endl;
- f_gen_ << indent() << "ret_err.write_to_out_protocol(o_prot)?;" << endl;
- f_gen_ << indent() << "o_prot.write_message_end()?;" << endl;
- f_gen_ << indent() << "o_prot.flush()" << endl;
-
- indent_down();
-
- branches_rendered++;
- }
-
- // the catch all, if somehow it was a user exception that we don't support
- f_gen_ << indent() << "} else {" << endl;
- indent_up();
-
- // FIXME: same as default block below
-
- f_gen_ << indent() << "let ret_err = {" << endl;
- indent_up();
- render_thrift_error_struct("ApplicationError", "ApplicationErrorKind::Unknown", "usr_err.description()");
- indent_down();
- f_gen_ << indent() << "};" << endl;
- render_sync_handler_send_exception_response(tfunc, "ret_err");
-
- indent_down();
- f_gen_ << indent() << "}" << endl;
-}
-
-void t_rs_generator::render_sync_handler_failed_application_exception_branch(
- t_function *tfunc,
- const string &app_err_var
-) {
- if (tfunc->is_oneway()) {
- f_gen_ << indent() << "Err(thrift::Error::Application(" << app_err_var << "))" << endl;
- } else {
- render_sync_handler_send_exception_response(tfunc, app_err_var);
- }
-}
-
-void t_rs_generator::render_sync_handler_failed_default_exception_branch(t_function *tfunc) {
- f_gen_ << indent() << "let ret_err = {" << endl;
- indent_up();
- render_thrift_error_struct("ApplicationError", "ApplicationErrorKind::Unknown", "e.description()");
- indent_down();
- f_gen_ << indent() << "};" << endl;
- if (tfunc->is_oneway()) {
- f_gen_ << indent() << "Err(thrift::Error::Application(ret_err))" << endl;
- } else {
- render_sync_handler_send_exception_response(tfunc, "ret_err");
- }
-}
-
-void t_rs_generator::render_sync_handler_send_exception_response(t_function *tfunc, const string &err_var) {
- f_gen_
- << indent()
- << "let message_ident = TMessageIdentifier::new("
- << "\"" << tfunc->get_name() << "\", " // note: use *original* name
- << "TMessageType::Exception, "
- << "incoming_sequence_number);"
- << endl;
- f_gen_ << indent() << "o_prot.write_message_begin(&message_ident)?;" << endl;
- f_gen_ << indent() << "thrift::Error::write_application_error_to_out_protocol(&" << err_var << ", o_prot)?;" << endl;
- f_gen_ << indent() << "o_prot.write_message_end()?;" << endl;
- f_gen_ << indent() << "o_prot.flush()" << endl;
-}
-
-string t_rs_generator::handler_successful_return_struct(t_function* tfunc) {
- int member_count = 0;
- ostringstream return_struct;
-
- return_struct << service_call_result_struct_name(tfunc) << " { ";
-
- // actual return
- if (!tfunc->get_returntype()->is_void()) {
- return_struct << "result_value: Some(handler_return)";
- member_count++;
- }
-
- // any user-defined exceptions
- if (tfunc->get_xceptions() != NULL) {
- t_struct* txceptions = tfunc->get_xceptions();
- const vector<t_field*> members = txceptions->get_sorted_members();
- vector<t_field*>::const_iterator members_iter;
- for (members_iter = members.begin(); members_iter != members.end(); ++members_iter) {
- t_field* xception_field = (*members_iter);
- if (member_count > 0) { return_struct << ", "; }
- return_struct << rust_field_name(xception_field) << ": None";
- member_count++;
- }
- }
-
- return_struct << " }";
-
- return return_struct.str();
-}
-
-//-----------------------------------------------------------------------------
-//
-// Utility
-//
-//-----------------------------------------------------------------------------
-
-void t_rs_generator::render_type_comment(const string& type_name) {
- f_gen_ << "//" << endl;
- f_gen_ << "// " << type_name << endl;
- f_gen_ << "//" << endl;
- f_gen_ << endl;
-}
-
-// NOTE: do *not* put in an extra newline after doc is generated.
-// This is because rust docs have to abut the line they're documenting.
-void t_rs_generator::render_rustdoc(t_doc* tdoc) {
- if (!tdoc->has_doc()) {
- return;
- }
-
- generate_docstring_comment(f_gen_, "", "/// ", tdoc->get_doc(), "");
-}
-
-void t_rs_generator::render_thrift_error(
- const string& error_kind,
- const string& error_struct,
- const string& sub_error_kind,
- const string& error_message
-) {
- f_gen_ << indent() << "Err(" << endl;
- indent_up();
- f_gen_ << indent() << "thrift::Error::" << error_kind << "(" << endl;
- indent_up();
- render_thrift_error_struct(error_struct, sub_error_kind, error_message);
- indent_down();
- f_gen_ << indent() << ")" << endl;
- indent_down();
- f_gen_ << indent() << ")" << endl;
-}
-
-void t_rs_generator::render_thrift_error_struct(
- const string& error_struct,
- const string& sub_error_kind,
- const string& error_message
-) {
- f_gen_ << indent() << error_struct << "::new(" << endl;
- indent_up();
- f_gen_ << indent() << sub_error_kind << "," << endl;
- f_gen_ << indent() << error_message << endl;
- indent_down();
- f_gen_ << indent() << ")" << endl;
-}
-
-bool t_rs_generator::is_double(t_type* ttype) {
- ttype = get_true_type(ttype);
- if (ttype->is_base_type()) {
- t_base_type::t_base tbase = ((t_base_type*)ttype)->get_base();
- if (tbase == t_base_type::TYPE_DOUBLE) {
- return true;
- }
- }
-
- return false;
-}
-
-string t_rs_generator::to_rust_type(t_type* ttype, bool ordered_float) {
- // ttype = get_true_type(ttype); <-- recurses through as many typedef layers as necessary
- if (ttype->is_base_type()) {
- t_base_type* tbase_type = ((t_base_type*)ttype);
- switch (tbase_type->get_base()) {
- case t_base_type::TYPE_VOID:
- return "()";
- case t_base_type::TYPE_STRING:
- if (tbase_type->is_binary()) {
- return "Vec<u8>";
- } else {
- return "String";
- }
- case t_base_type::TYPE_BOOL:
- return "bool";
- case t_base_type::TYPE_I8:
- return "i8";
- case t_base_type::TYPE_I16:
- return "i16";
- case t_base_type::TYPE_I32:
- return "i32";
- case t_base_type::TYPE_I64:
- return "i64";
- case t_base_type::TYPE_DOUBLE:
- if (ordered_float) {
- return "OrderedFloat<f64>";
- } else {
- return "f64";
- }
- }
- } else if (ttype->is_typedef()) {
- t_typedef* ttypedef = (t_typedef*)ttype;
- string rust_type = rust_namespace(ttype) + ttypedef->get_symbolic();
- rust_type = ttypedef->is_forward_typedef() ? "Box<" + rust_type + ">" : rust_type;
- return rust_type;
- } else if (ttype->is_enum()) {
- return rust_namespace(ttype) + rust_camel_case(ttype->get_name());
- } else if (ttype->is_struct() || ttype->is_xception()) {
- return rust_namespace(ttype) + rust_camel_case(ttype->get_name());
- } else if (ttype->is_map()) {
- t_map* tmap = (t_map*)ttype;
- return "BTreeMap<" + to_rust_type(tmap->get_key_type()) + ", " + to_rust_type(tmap->get_val_type()) + ">";
- } else if (ttype->is_set()) {
- t_set* tset = (t_set*)ttype;
- return "BTreeSet<" + to_rust_type(tset->get_elem_type()) + ">";
- } else if (ttype->is_list()) {
- t_list* tlist = (t_list*)ttype;
- return "Vec<" + to_rust_type(tlist->get_elem_type()) + ">";
- }
-
- throw "cannot find rust type for " + ttype->get_name();
-}
-
-string t_rs_generator::to_rust_const_type(t_type* ttype, bool ordered_float) {
- if (ttype->is_base_type()) {
- t_base_type* tbase_type = ((t_base_type*)ttype);
- if (tbase_type->get_base() == t_base_type::TYPE_STRING) {
- if (tbase_type->is_binary()) {
- return "&[u8]";
- } else {
- return "&str";
- }
- }
- }
-
- return to_rust_type(ttype, ordered_float);
-}
-
-string t_rs_generator::to_rust_field_type_enum(t_type* ttype) {
- ttype = get_true_type(ttype);
- if (ttype->is_base_type()) {
- t_base_type::t_base tbase = ((t_base_type*)ttype)->get_base();
- switch (tbase) {
- case t_base_type::TYPE_VOID:
- throw "will not generate protocol::TType for TYPE_VOID";
- case t_base_type::TYPE_STRING: // both strings and binary are actually encoded as TType::String
- return "TType::String";
- case t_base_type::TYPE_BOOL:
- return "TType::Bool";
- case t_base_type::TYPE_I8:
- return "TType::I08";
- case t_base_type::TYPE_I16:
- return "TType::I16";
- case t_base_type::TYPE_I32:
- return "TType::I32";
- case t_base_type::TYPE_I64:
- return "TType::I64";
- case t_base_type::TYPE_DOUBLE:
- return "TType::Double";
- }
- } else if (ttype->is_enum()) {
- return "TType::I32";
- } else if (ttype->is_struct() || ttype->is_xception()) {
- return "TType::Struct";
- } else if (ttype->is_map()) {
- return "TType::Map";
- } else if (ttype->is_set()) {
- return "TType::Set";
- } else if (ttype->is_list()) {
- return "TType::List";
- }
-
- throw "cannot find TType for " + ttype->get_name();
-}
-
-string t_rs_generator::opt_in_req_out_value(t_type* ttype) {
- ttype = get_true_type(ttype);
- if (ttype->is_base_type()) {
- t_base_type* tbase_type = ((t_base_type*)ttype);
- switch (tbase_type->get_base()) {
- case t_base_type::TYPE_VOID:
- throw "cannot generate OPT_IN_REQ_OUT value for void";
- case t_base_type::TYPE_STRING:
- if (tbase_type->is_binary()) {
- return "Some(Vec::new())";
- } else {
- return "Some(\"\".to_owned())";
- }
- case t_base_type::TYPE_BOOL:
- return "Some(false)";
- case t_base_type::TYPE_I8:
- case t_base_type::TYPE_I16:
- case t_base_type::TYPE_I32:
- case t_base_type::TYPE_I64:
- return "Some(0)";
- case t_base_type::TYPE_DOUBLE:
- return "Some(OrderedFloat::from(0.0))";
- }
-
- } else if (ttype->is_enum() || ttype->is_struct() || ttype->is_xception()) {
- return "None";
- } else if (ttype->is_list()) {
- return "Some(Vec::new())";
- } else if (ttype->is_set()) {
- return "Some(BTreeSet::new())";
- } else if (ttype->is_map()) {
- return "Some(BTreeMap::new())";
- }
-
- throw "cannot generate opt-in-req-out value for type " + ttype->get_name();
-}
-
-bool t_rs_generator::can_generate_simple_const(t_type* ttype) {
- t_type* actual_type = get_true_type(ttype);
- if (actual_type->is_base_type()) {
- t_base_type* tbase_type = (t_base_type*)actual_type;
- return !(tbase_type->get_base() == t_base_type::TYPE_DOUBLE);
- } else {
- return false;
- }
-}
-
-bool t_rs_generator::can_generate_const_holder(t_type* ttype) {
- t_type* actual_type = get_true_type(ttype);
- return !can_generate_simple_const(actual_type) && !actual_type->is_service();
-}
-
-bool t_rs_generator::is_void(t_type* ttype) {
- return ttype->is_base_type() && ((t_base_type*)ttype)->get_base() == t_base_type::TYPE_VOID;
-}
-
-bool t_rs_generator::is_optional(t_field::e_req req) {
- return req == t_field::T_OPTIONAL || req == t_field::T_OPT_IN_REQ_OUT;
-}
-
-t_field::e_req t_rs_generator::actual_field_req(t_field* tfield, t_rs_generator::e_struct_type struct_type) {
- return struct_type == t_rs_generator::T_ARGS ? t_field::T_REQUIRED : tfield->get_req();
-}
-
-bool t_rs_generator::has_args(t_function* tfunc) {
- return tfunc->get_arglist() != NULL && !tfunc->get_arglist()->get_sorted_members().empty();
-}
-
-bool t_rs_generator::has_non_void_args(t_function* tfunc) {
- bool has_non_void_args = false;
-
- const vector<t_field*> args = tfunc->get_arglist()->get_sorted_members();
- vector<t_field*>::const_iterator args_iter;
- for (args_iter = args.begin(); args_iter != args.end(); ++args_iter) {
- t_field* tfield = (*args_iter);
- if (!tfield->get_type()->is_void()) {
- has_non_void_args = true;
- break;
- }
- }
-
- return has_non_void_args;
-}
-
-string t_rs_generator::visibility_qualifier(t_rs_generator::e_struct_type struct_type) {
- switch(struct_type) {
- case t_rs_generator::T_ARGS:
- case t_rs_generator::T_RESULT:
- return "";
- default:
- return "pub ";
- }
-}
-
-string t_rs_generator::rust_namespace(t_service* tservice) {
- if (tservice->get_program()->get_name() != get_program()->get_name()) {
- return rust_snake_case(tservice->get_program()->get_name()) + "::";
- } else {
- return "";
- }
-}
-
-string t_rs_generator::rust_namespace(t_type* ttype) {
- if (ttype->get_program()->get_name() != get_program()->get_name()) {
- return rust_snake_case(ttype->get_program()->get_name()) + "::";
- } else {
- return "";
- }
-}
-
-bool t_rs_generator::is_reserved(const string& name) {
- return RUST_RESERVED_WORDS_SET.find(name) != RUST_RESERVED_WORDS_SET.end();
-}
-
-string t_rs_generator::rust_struct_name(t_struct* tstruct) {
- string base_struct_name(rust_camel_case(tstruct->get_name()));
- return rust_safe_name(base_struct_name);
-}
-
-string t_rs_generator::rust_field_name(t_field* tfield) {
- string base_field_name(rust_snake_case(tfield->get_name()));
- return rust_safe_name(base_field_name);
-}
-
-string t_rs_generator::rust_union_field_name(t_field* tfield) {
- string base_field_name(rust_camel_case(tfield->get_name()));
- return rust_safe_name(base_field_name);
-}
-
-string t_rs_generator::rust_safe_name(const string& name) {
- if (is_reserved(name)) {
- return name + "_";
- } else {
- return name;
- }
-}
-
-string t_rs_generator::service_call_client_function_name(t_function* tfunc) {
- return rust_snake_case(tfunc->get_name());
-}
-
-string t_rs_generator::service_call_handler_function_name(t_function* tfunc) {
- return "handle_" + rust_snake_case(tfunc->get_name());
-}
-
-string t_rs_generator::service_call_args_struct_name(t_function* tfunc) {
- // Thrift automatically appends `Args` to the arglist name. No need to do it here.
- return rust_camel_case(service_name_) + rust_camel_case(tfunc->get_arglist()->get_name());
-}
-
-string t_rs_generator::service_call_result_struct_name(t_function* tfunc) {
- return rust_camel_case(service_name_) + rust_camel_case(tfunc->get_name()) + RESULT_STRUCT_SUFFIX;
-}
-
-string t_rs_generator::rust_sync_client_marker_trait_name(t_service* tservice) {
- return "T" + rust_camel_case(tservice->get_name()) + "SyncClientMarker";
-}
-
-string t_rs_generator::rust_sync_client_trait_name(t_service* tservice) {
- return "T" + rust_camel_case(tservice->get_name()) + "SyncClient";
-}
-
-string t_rs_generator::rust_sync_client_impl_name(t_service* tservice) {
- return rust_camel_case(tservice->get_name()) + "SyncClient";
-}
-
-string t_rs_generator::rust_sync_handler_trait_name(t_service* tservice) {
- return rust_camel_case(tservice->get_name()) + "SyncHandler";
-}
-
-string t_rs_generator::rust_sync_processor_name(t_service* tservice) {
- return rust_camel_case(tservice->get_name()) + "SyncProcessor";
-}
-
-string t_rs_generator::rust_sync_processor_impl_name(t_service *tservice) {
- return "T" + rust_camel_case(tservice->get_name()) + "ProcessFunctions";
-}
-
-string t_rs_generator::rust_enum_variant_name(const string &name) {
- bool all_uppercase = true;
-
- for (char i : name) {
- if (isalnum(i) && islower(i)) {
- all_uppercase = false;
- break;
- }
- }
-
- if (all_uppercase) {
- return capitalize(camelcase(lowercase(name)));
- } else {
- return capitalize(camelcase(name));
- }
-}
-
-string t_rs_generator::rust_upper_case(const string& name) {
- string str(uppercase(underscore(name)));
- string_replace(str, "__", "_");
- return str;
-}
-
-string t_rs_generator::rust_snake_case(const string& name) {
- string str(decapitalize(underscore(name)));
- string_replace(str, "__", "_");
- return str;
-}
-
-string t_rs_generator::rust_camel_case(const string& name) {
- string str(capitalize(camelcase(name)));
- string_replace(str, "_", "");
- return str;
-}
-
-string t_rs_generator::rust_safe_field_id(int32_t id) {
- string id_str = std::to_string(abs(id));
- if (id >= 0) {
- return id_str;
- } else {
- string str("neg");
- str += id_str;
- return str;
- }
-}
-
-void t_rs_generator::string_replace(string& target, const string& search_string, const string& replace_string) {
- if (target.empty()) {
- return;
- }
-
- size_t match_len = search_string.length();
- size_t replace_len = replace_string.length();
-
- size_t search_idx = 0;
- size_t match_idx;
- while ((match_idx = target.find(search_string, search_idx)) != string::npos) {
- target.replace(match_idx, match_len, replace_string);
- search_idx = match_idx + replace_len;
- }
-}
-
-THRIFT_REGISTER_GENERATOR(
- rs,
- "Rust",
- "\n") // no Rust-generator-specific options