New upstream version 1.43.0+dfsg1

[rustc.git] / src / test / ui-fulldeps / auxiliary / lint-group-plugin-test.rs

// force-host

#![feature(plugin_registrar)]
#![feature(box_syntax, rustc_private)]

// Load rustc as a plugin to get macros.
extern crate rustc_driver;
extern crate rustc_hir;
#[macro_use]
extern crate rustc_lint;
#[macro_use]
extern crate rustc_session;

use rustc_driver::plugin::Registry;
use rustc_lint::{LateContext, LateLintPass, LintArray, LintContext, LintId, LintPass};

declare_lint!(TEST_LINT, Warn, "Warn about items named 'lintme'");

declare_lint!(PLEASE_LINT, Warn, "Warn about items named 'pleaselintme'");

declare_lint_pass!(Pass => [TEST_LINT, PLEASE_LINT]);

impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
    fn check_item(&mut self, cx: &LateContext, it: &rustc_hir::Item) {
        match &*it.ident.as_str() {
            "lintme" => cx.lint(TEST_LINT, |lint| {
                lint.build("item is named 'lintme'").set_span(it.span).emit()
            }),
            "pleaselintme" => cx.lint(PLEASE_LINT, |lint| {
                lint.build("item is named 'pleaselintme'").set_span(it.span).emit()
            }),
            _ => {}
        }
    }
}

#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
    reg.lint_store.register_lints(&[&TEST_LINT, &PLEASE_LINT]);
    reg.lint_store.register_late_pass(|| box Pass);
    reg.lint_store.register_group(
        true,
        "lint_me",
        None,
        vec![LintId::of(&TEST_LINT), LintId::of(&PLEASE_LINT)],
    );
}