49 lines
1.3 KiB
Rust
49 lines
1.3 KiB
Rust
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/// checks for attributes
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use rustc::plugin::Registry;
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use rustc::lint::*;
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use syntax::ast::*;
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use syntax::ptr::P;
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use syntax::codemap::Span;
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use syntax::parse::token::InternedString;
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declare_lint! { pub INLINE_ALWAYS, Warn,
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"#[inline(always)] is usually a bad idea."}
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#[derive(Copy,Clone)]
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pub struct AttrPass;
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impl LintPass for AttrPass {
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fn get_lints(&self) -> LintArray {
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lint_array!(INLINE_ALWAYS)
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}
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fn check_item(&mut self, cx: &Context, item: &Item) {
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check_attrs(cx, &item.ident, &item.attrs)
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}
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fn check_impl_item(&mut self, cx: &Context, item: &ImplItem) {
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check_attrs(cx, &item.ident, &item.attrs)
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}
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fn check_trait_item(&mut self, cx: &Context, item: &TraitItem) {
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check_attrs(cx, &item.ident, &item.attrs)
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}
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}
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fn check_attrs(cx: &Context, ident: &Ident, attrs: &[Attribute]) {
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for attr in attrs {
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if let MetaList(ref inline, ref values) = attr.node.value.node {
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if values.len() != 1 || inline != &"inline" { continue; }
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if let MetaWord(ref always) = values[0].node {
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if always != &"always" { continue; }
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cx.span_lint(INLINE_ALWAYS, attr.span, &format!(
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"You have declared #[inline(always)] on {}. This \
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is usually a bad idea. Are you sure?",
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ident.as_str()));
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}
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}
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}
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}
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