rust/tests/ui-fulldeps/auxiliary/lint-plugin-test.rs

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// force-host
#![feature(rustc_private)]
extern crate rustc_ast;
// Load rustc as a plugin to get macros
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extern crate rustc_driver;
#[macro_use]
extern crate rustc_lint;
#[macro_use]
extern crate rustc_session;
use rustc_driver::plugin::Registry;
use rustc_lint::{EarlyContext, EarlyLintPass, LintArray, LintContext, LintPass};
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use rustc_ast as ast;
declare_lint!(TEST_LINT, Warn, "Warn about items named 'lintme'");
declare_lint_pass!(Pass => [TEST_LINT]);
impl EarlyLintPass for Pass {
fn check_item(&mut self, cx: &EarlyContext, it: &ast::Item) {
if it.ident.name.as_str() == "lintme" {
cx.lint(TEST_LINT, "item is named 'lintme'", |lint| lint.set_span(it.span));
}
}
}
#[no_mangle]
fn __rustc_plugin_registrar(reg: &mut Registry) {
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reg.lint_store.register_lints(&[&TEST_LINT]);
reg.lint_store.register_early_pass(|| Box::new(Pass));
}