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perf(linter): no_shadow_restricted_names only look up name in hashmap once #4472

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merged 1 commit into from
Jul 26, 2024
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perf(linter): no_shadow_restricted_names only look up name in hashmap once #4472

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19 changes: 9 additions & 10 deletions crates/oxc_linter/src/rules/eslint/no_shadow_restricted_names.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -36,18 +36,15 @@ declare_oxc_lint!(
correctness
);

#[inline]
fn check_and_diagnostic(s: &str, span: Span, ctx: &LintContext) {
if PRE_DEFINE_VAR.contains_key(s) {
ctx.diagnostic(no_shadow_restricted_names_diagnostic(s, span));
}
}

impl Rule for NoShadowRestrictedNames {
fn run_once(&self, ctx: &LintContext<'_>) {
ctx.symbols().iter().for_each(|symbol_id| {
let name = ctx.symbols().get_name(symbol_id);

if !PRE_DEFINE_VAR.contains_key(name) {
return;
}

if name == "undefined" {
// Allow to declare `undefined` variable but not allow to assign value to it.
let node_id = ctx.semantic().symbols().get_declaration(symbol_id);
Expand All @@ -63,9 +60,11 @@ impl Rule for NoShadowRestrictedNames {
}
}

check_and_diagnostic(name, ctx.symbols().get_span(symbol_id), ctx);
for span in ctx.symbols().get_redeclarations(symbol_id) {
check_and_diagnostic(name, *span, ctx);
let span = ctx.symbols().get_span(symbol_id);
ctx.diagnostic(no_shadow_restricted_names_diagnostic(name, span));

for &span in ctx.symbols().get_redeclarations(symbol_id) {
ctx.diagnostic(no_shadow_restricted_names_diagnostic(name, span));
}
});
}
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