src/librustc_lint/non_ascii_idents.rs

   1 use crate::lint::{EarlyContext, EarlyLintPass, LintArray, LintContext, LintPass};
   2 use syntax::ast;
   3
   4 declare_lint! {
   5     pub NON_ASCII_IDENTS,
   6     Allow,
   7     "detects non-ASCII identifiers"
   8 }
   9
  10 declare_lint_pass!(NonAsciiIdents => [NON_ASCII_IDENTS]);
  11
  12 impl EarlyLintPass for NonAsciiIdents {
  13     fn check_ident(&mut self, cx: &EarlyContext<'_>, ident: ast::Ident) {
  14         if !ident.name.as_str().is_ascii() {
  15             cx.struct_span_lint(
  16                 NON_ASCII_IDENTS,
  17                 ident.span,
  18                 "identifier contains non-ASCII characters",
  19             )
  20             .emit();
  21         }
  22     }
  23 }