vendor/serde_derive/src/lib.rs

   1 //! This crate provides Serde's two derive macros.
   2 //!
   3 //! ```edition2018
   4 //! # use serde_derive::{Serialize, Deserialize};
   5 //! #
   6 //! #[derive(Serialize, Deserialize)]
   7 //! # struct S;
   8 //! #
   9 //! # fn main() {}
  10 //! ```
  11 //!
  12 //! Please refer to [https://serde.rs/derive.html] for how to set this up.
  13 //!
  14 //! [https://serde.rs/derive.html]: https://serde.rs/derive.html
  15
  16 #![doc(html_root_url = "https://docs.rs/serde_derive/1.0.137")]
  17 #![allow(unknown_lints, bare_trait_objects)]
  18 // Ignored clippy lints
  19 #![allow(
  20     // clippy false positive: https://github.com/rust-lang/rust-clippy/issues/7054
  21     clippy::branches_sharing_code,
  22     clippy::cognitive_complexity,
  23     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/7575
  24     clippy::collapsible_match,
  25     clippy::enum_variant_names,
  26     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6797
  27     clippy::manual_map,
  28     clippy::match_like_matches_macro,
  29     clippy::needless_pass_by_value,
  30     clippy::too_many_arguments,
  31     clippy::trivially_copy_pass_by_ref,
  32     clippy::used_underscore_binding,
  33     clippy::wildcard_in_or_patterns,
  34     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
  35     clippy::unnested_or_patterns,
  36 )]
  37 // Ignored clippy_pedantic lints
  38 #![allow(
  39     clippy::cast_possible_truncation,
  40     clippy::checked_conversions,
  41     clippy::doc_markdown,
  42     clippy::enum_glob_use,
  43     clippy::indexing_slicing,
  44     clippy::items_after_statements,
  45     clippy::let_underscore_drop,
  46     clippy::manual_assert,
  47     clippy::map_err_ignore,
  48     clippy::match_same_arms,
  49     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6984
  50     clippy::match_wildcard_for_single_variants,
  51     clippy::module_name_repetitions,
  52     clippy::must_use_candidate,
  53     clippy::option_if_let_else,
  54     clippy::similar_names,
  55     clippy::single_match_else,
  56     clippy::struct_excessive_bools,
  57     clippy::too_many_lines,
  58     clippy::unseparated_literal_suffix,
  59     clippy::unused_self,
  60     clippy::use_self,
  61     clippy::wildcard_imports
  62 )]
  63 #![cfg_attr(all(test, exhaustive), feature(non_exhaustive_omitted_patterns_lint))]
  64
  65 #[macro_use]
  66 extern crate quote;
  67 #[macro_use]
  68 extern crate syn;
  69
  70 extern crate proc_macro;
  71 extern crate proc_macro2;
  72
  73 mod internals;
  74
  75 use proc_macro::TokenStream;
  76 use syn::DeriveInput;
  77
  78 #[macro_use]
  79 mod bound;
  80 #[macro_use]
  81 mod fragment;
  82
  83 mod de;
  84 mod dummy;
  85 mod pretend;
  86 mod ser;
  87 mod try;
  88
  89 #[proc_macro_derive(Serialize, attributes(serde))]
  90 pub fn derive_serialize(input: TokenStream) -> TokenStream {
  91     let mut input = parse_macro_input!(input as DeriveInput);
  92     ser::expand_derive_serialize(&mut input)
  93         .unwrap_or_else(to_compile_errors)
  94         .into()
  95 }
  96
  97 #[proc_macro_derive(Deserialize, attributes(serde))]
  98 pub fn derive_deserialize(input: TokenStream) -> TokenStream {
  99     let mut input = parse_macro_input!(input as DeriveInput);
 100     de::expand_derive_deserialize(&mut input)
 101         .unwrap_or_else(to_compile_errors)
 102         .into()
 103 }
 104
 105 fn to_compile_errors(errors: Vec<syn::Error>) -> proc_macro2::TokenStream {
 106     let compile_errors = errors.iter().map(syn::Error::to_compile_error);
 107     quote!(#(#compile_errors)*)
 108 }