3 #![feature(plugin_registrar)]
4 #![feature(box_syntax, rustc_private)]
6 // Load rustc as a plugin to get macros.
7 extern crate rustc_driver;
8 extern crate rustc_hir;
10 extern crate rustc_lint;
12 extern crate rustc_session;
14 use rustc_driver::plugin::Registry;
15 use rustc_lint::{LateContext, LateLintPass, LintArray, LintContext, LintId, LintPass};
17 declare_lint!(TEST_LINT, Warn, "Warn about items named 'lintme'");
19 declare_lint!(PLEASE_LINT, Warn, "Warn about items named 'pleaselintme'");
21 declare_lint_pass!(Pass => [TEST_LINT, PLEASE_LINT]);
23 impl<'tcx> LateLintPass<'tcx> for Pass {
24 fn check_item(&mut self, cx: &LateContext, it: &rustc_hir::Item) {
25 match &*it.ident.as_str() {
26 "lintme" => cx.lint(TEST_LINT, |lint| {
27 lint.build("item is named 'lintme'").set_span(it.span).emit()
29 "pleaselintme" => cx.lint(PLEASE_LINT, |lint| {
30 lint.build("item is named 'pleaselintme'").set_span(it.span).emit()
38 pub fn plugin_registrar(reg: &mut Registry) {
39 reg.lint_store.register_lints(&[&TEST_LINT, &PLEASE_LINT]);
40 reg.lint_store.register_late_pass(|| box Pass);
41 reg.lint_store.register_group(
45 vec![LintId::of(&TEST_LINT), LintId::of(&PLEASE_LINT)],