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Emit map_unit_fn lint in closure case

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This commit is contained in:
Obei Sideg 2023-02-16 22:18:14 +03:00
parent ddd7d10879
commit a87443a859
1 changed files with 16 additions and 0 deletions
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16
compiler/rustc_lint/src/map_unit_fn.rs
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@ -72,6 +72,22 @@ impl<'tcx> LateLintPass<'tcx> for MapUnitFn {
},
)
}
} else if let ty::Closure(id, subs) = arg_ty.kind() {
let cl_ty = subs.as_closure().sig();
let ret_ty = cl_ty.output().skip_binder();
if is_unit_type(ret_ty) {
cx.emit_spanned_lint(
MAP_UNIT_FN,
span,
MappingToUnit {
function_label: cx.tcx.span_of_impl(*id).unwrap(),
argument_label: args[0].span,
map_label: arg_ty.default_span(cx.tcx),
suggestion: path.ident.span,
replace: "for_each".to_string(),
},
)
}
}
}
}