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check_pat: delay creation of the "normal" vec until we reach the branch where is is actually needed

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This commit is contained in:
Matthias Krüger 2020-03-08 02:50:33 +01:00
parent 3d0f0e33af
commit a412b3423e
1 changed files with 13 additions and 12 deletions
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25
clippy_lints/src/misc_early.rs
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@ -318,18 +318,6 @@ impl EarlyLintPass for MiscEarlyLints {
return;
}
if wilds > 0 {
let mut normal = vec![];
for field in pfields {
match field.pat.kind {
PatKind::Wild => {},
_ => {
if let Ok(n) = cx.sess().source_map().span_to_snippet(field.span) {
normal.push(n);
}
},
}
}
for field in pfields {
if let PatKind::Wild = field.pat.kind {
wilds -= 1;
@ -341,6 +329,19 @@ impl EarlyLintPass for MiscEarlyLints {
"You matched a field with a wildcard pattern. Consider using `..` instead",
);
} else {
let mut normal = vec![];
for field in pfields {
match field.pat.kind {
PatKind::Wild => {},
_ => {
if let Ok(n) = cx.sess().source_map().span_to_snippet(field.span) {
normal.push(n);
}
},
}
}
span_lint_and_help(
cx,
UNNEEDED_FIELD_PATTERN,