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
  23 use rustc::session::Session;
  24 use rustc::session::config::{self, Input};
  25 use rustc_driver::{driver, CompilerCalls, Compilation};
  26 use syntax::diagnostics;
  27
  28 use std::path::PathBuf;
  29
  30 struct TestCalls {
  31     count: u32
  32 }
  33
  34 impl<'a> CompilerCalls<'a> for TestCalls {
  35     fn early_callback(&mut self,
  36                       _: &getopts::Matches,
  37                       _: &diagnostics::registry::Registry)
  38                       -> Compilation {
  39         self.count *= 2;
  40         Compilation::Continue
  41     }
  42
  43     fn late_callback(&mut self,
  44                      _: &getopts::Matches,
  45                      _: &Session,
  46                      _: &Input,
  47                      _: &Option<PathBuf>,
  48                      _: &Option<PathBuf>)
  49                      -> Compilation {
  50         self.count *= 3;
  51         Compilation::Stop
  52     }
  53
  54     fn some_input(&mut self, input: Input, input_path: Option<PathBuf>)
  55                   -> (Input, Option<PathBuf>) {
  56         self.count *= 5;
  57         (input, input_path)
  58     }
  59
  60     fn no_input(&mut self,
  61                 _: &getopts::Matches,
  62                 _: &config::Options,
  63                 _: &Option<PathBuf>,
  64                 _: &Option<PathBuf>,
  65                 _: &diagnostics::registry::Registry)
  66                 -> Option<(Input, Option<PathBuf>)> {
  67         panic!("This shouldn't happen");
  68     }
  69
  70     fn build_controller(&mut self, _: &Session) -> driver::CompileController<'a> {
  71         panic!("This shouldn't be called");
  72     }
  73 }
  74
  75
  76 fn main() {
  77     let mut tc = TestCalls { count: 1 };
  78     // we should never get use this filename, but lets make sure they are valid args.
  79     let args = vec!["compiler-calls".to_string(), "foo.rs".to_string()];
  80     rustc_driver::run_compiler(&args, &mut tc);
  81     assert!(tc.count == 30);
  82 }