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add a lowercase suggestion to unknown_lints
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parent
32f6056079
commit
ba643fadfe
@ -247,13 +247,27 @@ impl<'a> LintLevelsBuilder<'a> {
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self.cur,
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Some(&specs));
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let msg = format!("unknown lint: `{}`", name);
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lint::struct_lint_level(self.sess,
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let mut db = lint::struct_lint_level(self.sess,
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lint,
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level,
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src,
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Some(li.span.into()),
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&msg)
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.emit();
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&msg);
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if name.as_str().chars().any(|c| c.is_uppercase()) {
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let name_lower = name.as_str().to_lowercase();
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if let CheckLintNameResult::NoLint =
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store.check_lint_name(&name_lower) {
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db.emit();
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} else {
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db.span_suggestion(
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li.span,
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"lowercase the lint name",
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name_lower
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).emit();
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}
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} else {
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db.emit();
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}
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}
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}
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}
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21
src/test/ui/lint/not_found.rs
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21
src/test/ui/lint/not_found.rs
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@ -0,0 +1,21 @@
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// Copyright 2014–2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// this tests the `unknown_lint` lint, especially the suggestions
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// the suggestion only appears if a lint with the lowercase name exists
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#[allow(FOO_BAR)]
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// the suggestion appears on all-uppercase names
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#[warn(DEAD_CODE)]
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// the suggestion appears also on mixed-case names
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#[deny(Warnings)]
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fn main() {
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unimplemented!();
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}
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20
src/test/ui/lint/not_found.stderr
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20
src/test/ui/lint/not_found.stderr
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@ -0,0 +1,20 @@
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warning: unknown lint: `FOO_BAR`
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--> $DIR/not_found.rs:14:9
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14 | #[allow(FOO_BAR)]
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| ^^^^^^^
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|
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= note: #[warn(unknown_lints)] on by default
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warning: unknown lint: `DEAD_CODE`
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--> $DIR/not_found.rs:16:8
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16 | #[warn(DEAD_CODE)]
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| ^^^^^^^^^ help: lowercase the lint name: `dead_code`
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warning: unknown lint: `Warnings`
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--> $DIR/not_found.rs:18:8
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18 | #[deny(Warnings)]
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| ^^^^^^^^ help: lowercase the lint name: `warnings`
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