match tcx.sess.diagnostic().steal_diagnostic(span, StashKey::ItemNoType) {
Some(mut err) => {
if !ty.references_error() {
+ // Only suggest adding `:` if it was missing (and suggested by parsing diagnostic)
+ let colon = if span == item_ident.span.shrink_to_hi() { ":" } else { "" };
+
// The parser provided a sub-optimal `HasPlaceholders` suggestion for the type.
// We are typeck and have the real type, so remove that and suggest the actual type.
// FIXME(eddyb) this looks like it should be functionality on `Diagnostic`.
err.span_suggestion(
span,
&format!("provide a type for the {item}", item = kind),
- format!("{}: {}", item_ident, sugg_ty),
+ format!("{colon} {sugg_ty}"),
Applicability::MachineApplicable,
);
} else {