src/test/run-pass-fulldeps/compiler-calls.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Test that the CompilerCalls interface to the compiler works.
  12
  13 // ignore-cross-compile
  14
  15 #![feature(rustc_private, path)]
  16 #![feature(core)]
  17
  18 extern crate getopts;
  19 extern crate rustc;
  20 extern crate rustc_driver;
  21 extern crate syntax;
  22 extern crate rustc_errors as errors;
  23
  24 use rustc::session::Session;
  25 use rustc::session::config::{self, Input};
  26 use rustc_driver::{driver, CompilerCalls, Compilation};
  27 use syntax::ast;
  28
  29 use std::path::PathBuf;
  30
  31 struct TestCalls {
  32     count: u32
  33 }
  34
  35 impl<'a> CompilerCalls<'a> for TestCalls {
  36     fn early_callback(&mut self,
  37                       _: &getopts::Matches,
  38                       _: &config::Options,
  39                       _: &ast::CrateConfig,
  40                       _: &errors::registry::Registry,
  41                       _: config::ErrorOutputType)
  42                       -> Compilation {
  43         self.count *= 2;
  44         Compilation::Continue
  45     }
  46
  47     fn late_callback(&mut self,
  48                      _: &getopts::Matches,
  49                      _: &Session,
  50                      _: &ast::CrateConfig,
  51                      _: &Input,
  52                      _: &Option<PathBuf>,
  53                      _: &Option<PathBuf>)
  54                      -> Compilation {
  55         self.count *= 3;
  56         Compilation::Stop
  57     }
  58
  59     fn some_input(&mut self, input: Input, input_path: Option<PathBuf>)
  60                   -> (Input, Option<PathBuf>) {
  61         self.count *= 5;
  62         (input, input_path)
  63     }
  64
  65     fn no_input(&mut self,
  66                 _: &getopts::Matches,
  67                 _: &config::Options,
  68                 _: &ast::CrateConfig,
  69                 _: &Option<PathBuf>,
  70                 _: &Option<PathBuf>,
  71                 _: &errors::registry::Registry)
  72                 -> Option<(Input, Option<PathBuf>)> {
  73         panic!("This shouldn't happen");
  74     }
  75
  76     fn build_controller(&mut self,
  77                         _: &Session,
  78                         _: &getopts::Matches)
  79                         -> driver::CompileController<'a> {
  80         panic!("This shouldn't be called");
  81     }
  82 }
  83
  84
  85 fn main() {
  86     let mut tc = TestCalls { count: 1 };
  87     // we should never get use this filename, but lets make sure they are valid args.
  88     let args = vec!["compiler-calls".to_string(), "foo.rs".to_string()];
  89     rustc_driver::run_compiler(&args, &mut tc);
  90     assert_eq!(tc.count, 30);
  91 }