user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Diagnostic note when matching tuple enum with struct pattern

Browse source
This commit is contained in:
Thomas Karpiniec 2017-09-23 16:04:03 +10:00
parent 14039a42ac
commit 8a66362430
1 changed files with 8 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/librustc_typeck/check/_match.rs
View file

@ -787,11 +787,14 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
for field in variant.fields
.iter()
.filter(|field| !used_fields.contains_key(&field.name)) {
struct_span_err!(tcx.sess, span, E0027,
"pattern does not mention field `{}`",
field.name)
.span_label(span, format!("missing field `{}`", field.name))
.emit();
let mut diag = struct_span_err!(tcx.sess, span, E0027,
"pattern does not mention field `{}`",
field.name);
diag.span_label(span, format!("missing field `{}`", field.name));
if variant.ctor_kind == CtorKind::Fn {
diag.note("trying to match a tuple variant with a struct variant pattern");
}
diag.emit();
}
}
}