src/tools/clippy/clippy_lints/src/misc_early/builtin_type_shadow.rs

   1 use clippy_utils::diagnostics::span_lint;
   2 use rustc_ast::ast::{GenericParam, GenericParamKind};
   3 use rustc_hir::PrimTy;
   4 use rustc_lint::EarlyContext;
   5
   6 use super::BUILTIN_TYPE_SHADOW;
   7
   8 pub(super) fn check(cx: &EarlyContext<'_>, param: &GenericParam) {
   9     if let GenericParamKind::Type { .. } = param.kind {
  10         if let Some(prim_ty) = PrimTy::from_name(param.ident.name) {
  11             span_lint(
  12                 cx,
  13                 BUILTIN_TYPE_SHADOW,
  14                 param.ident.span,
  15                 &format!("this generic shadows the built-in type `{}`", prim_ty.name()),
  16             );
  17         }
  18     }
  19 }