src/test/compile-fail-fulldeps/auxiliary/lint_plugin_test.rs

   1 // Copyright 2014 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 // force-host
  12
  13 #![feature(plugin_registrar)]
  14 #![feature(box_syntax, rustc_private)]
  15 #![feature(macro_vis_matcher)]
  16
  17 extern crate syntax;
  18
  19 // Load rustc as a plugin to get macros
  20 #[macro_use]
  21 extern crate rustc;
  22 extern crate rustc_plugin;
  23
  24 use rustc::lint::{EarlyContext, LintContext, LintPass, EarlyLintPass,
  25                   EarlyLintPassObject, LintArray};
  26 use rustc_plugin::Registry;
  27 use syntax::ast;
  28 declare_lint!(TEST_LINT, Warn, "Warn about items named 'lintme'");
  29
  30 struct Pass;
  31
  32 impl LintPass for Pass {
  33     fn get_lints(&self) -> LintArray {
  34         lint_array!(TEST_LINT)
  35     }
  36 }
  37
  38 impl EarlyLintPass for Pass {
  39     fn check_item(&mut self, cx: &EarlyContext, it: &ast::Item) {
  40         if it.ident.name == "lintme" {
  41             cx.span_lint(TEST_LINT, it.span, "item is named 'lintme'");
  42         }
  43     }
  44 }
  45
  46 #[plugin_registrar]
  47 pub fn plugin_registrar(reg: &mut Registry) {
  48     reg.register_early_lint_pass(box Pass as EarlyLintPassObject);
  49 }