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Refactor 'lint_or_fun_call'

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This commit is contained in:
Jeremy Stucki 2019-08-23 22:31:22 +02:00
parent 419c87fb35
commit 4130dfba2e
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1 changed files with 30 additions and 39 deletions
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69
clippy_lints/src/methods/mod.rs
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@ -1281,46 +1281,37 @@ fn lint_or_fun_call<'a, 'tcx>(
(&paths::RESULT, true, &["or", "unwrap_or"], "else"),
];
// early check if the name is one we care about
if know_types.iter().all(|k| !k.2.contains(&name)) {
return;
if_chain! {
if know_types.iter().any(|k| k.2.contains(&name));
let mut finder = FunCallFinder { cx: &cx, found: false };
if { finder.visit_expr(&arg); finder.found };
let self_ty = cx.tables.expr_ty(self_expr);
if let Some(&(_, fn_has_arguments, poss, suffix)) =
know_types.iter().find(|&&i| match_type(cx, self_ty, i.0));
if poss.contains(&name);
then {
let sugg: Cow<'_, _> = match (fn_has_arguments, !or_has_args) {
(true, _) => format!("|_| {}", snippet_with_macro_callsite(cx, arg.span, "..")).into(),
(false, false) => format!("|| {}", snippet_with_macro_callsite(cx, arg.span, "..")).into(),
(false, true) => snippet_with_macro_callsite(cx, fun_span, ".."),
};
let span_replace_word = method_span.with_hi(span.hi());
span_lint_and_sugg(
cx,
OR_FUN_CALL,
span_replace_word,
&format!("use of `{}` followed by a function call", name),
"try this",
format!("{}_{}({})", name, suffix, sugg),
Applicability::HasPlaceholders,
);
}
}
let mut finder = FunCallFinder { cx: &cx, found: false };
finder.visit_expr(&arg);
if !finder.found {
return;
}
let self_ty = cx.tables.expr_ty(self_expr);
let (fn_has_arguments, poss, suffix) = if let Some(&(_, fn_has_arguments, poss, suffix)) =
know_types.iter().find(|&&i| match_type(cx, self_ty, i.0))
{
(fn_has_arguments, poss, suffix)
} else {
return;
};
if !poss.contains(&name) {
return;
}
let sugg: Cow<'_, _> = match (fn_has_arguments, !or_has_args) {
(true, _) => format!("|_| {}", snippet_with_macro_callsite(cx, arg.span, "..")).into(),
(false, false) => format!("|| {}", snippet_with_macro_callsite(cx, arg.span, "..")).into(),
(false, true) => snippet_with_macro_callsite(cx, fun_span, ".."),
};
let span_replace_word = method_span.with_hi(span.hi());
span_lint_and_sugg(
cx,
OR_FUN_CALL,
span_replace_word,
&format!("use of `{}` followed by a function call", name),
"try this",
format!("{}_{}({})", name, suffix, sugg),
Applicability::HasPlaceholders,
);
}
if args.len() == 2 {