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Integrate suggestion spans

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This commit is contained in:
sinkuu 2017-02-21 19:03:50 +09:00
parent 3516d45d7c
commit cb86c57c5f
2 changed files with 10 additions and 13 deletions
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20
clippy_lints/src/needless_pass_by_value.rs
View File

@ -132,27 +132,25 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NeedlessPassByValue {
db.span_suggestion(input.span,
&format!("consider changing the type to `{}`", slice_ty),
slice_ty);
return;
return; // `Vec` and `String` cannot be destructured - no need for `*` suggestion
}}
if match_type(cx, ty, &paths::STRING) {
db.span_suggestion(input.span,
"consider changing the type to `&str`",
"&str".to_string());
} else {
db.span_suggestion(input.span,
"consider taking a reference instead",
format!("&{}", snippet(cx, input.span, "_")));
return;
}
// Suggests adding `*` to dereference the added reference if needed.
if let Some(spans) = spans_need_deref.get(&defid) {
let mut spans: Vec<_> = spans.iter().cloned()
.map(|span| (span, format!("*{}", snippet(cx, span, "<expr>"))))
.collect();
let mut spans = vec![(input.span, format!("&{}", snippet(cx, input.span, "_")))];
// Suggests adding `*` to dereference the added reference.
if let Some(deref_span) = spans_need_deref.get(&defid) {
spans.extend(deref_span.iter().cloned()
.map(|span| (span, format!("*{}", snippet(cx, span, "<expr>")))));
spans.sort_by_key(|&(span, _)| span);
multispan_sugg(db, "...and dereference it here".to_string(), spans);
}
multispan_sugg(db, "consider taking a reference instead".to_string(), spans);
};
span_lint_and_then(cx,

3
tests/ui/needless_pass_by_value.stderr
View File

@ -47,7 +47,6 @@ error: this argument is passed by value, but not consumed in the function body
|
help: consider taking a reference instead
| fn test_match(x: &Option<Option<String>>, y: Option<Option<String>>) {
help: ...and dereference it here
| match *x {
error: this argument is passed by value, but not consumed in the function body
@ -67,7 +66,7 @@ error: this argument is passed by value, but not consumed in the function body
|
help: consider taking a reference instead
| fn test_destructure(x: Wrapper, y: &Wrapper, z: Wrapper) {
help: ...and dereference it here
| let Wrapper(s) = z; // moved
| let Wrapper(ref t) = *y; // not moved
| let Wrapper(_) = *y; // still not moved