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in which .. is suggested for erroneous ... in struct field patterns

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Resolves #46718.
This commit is contained in:
Zack M. Davis
2017-12-16 00:58:19 -08:00
parent b3392f8ae4
commit d40197c471
3 changed files with 48 additions and 1 deletions
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14
src/libsyntax/parse/parser.rs
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@@ -1212,6 +1212,9 @@ impl<'a> Parser<'a> {
pub fn span_err(&self, sp: Span, m: &str) {
self.sess.span_diagnostic.span_err(sp, m)
}
pub fn struct_span_err(&self, sp: Span, m: &str) -> DiagnosticBuilder<'a> {
self.sess.span_diagnostic.struct_span_err(sp, m)
}
pub fn span_err_help(&self, sp: Span, m: &str, h: &str) {
let mut err = self.sess.span_diagnostic.mut_span_err(sp, m);
err.help(h);
@@ -3445,7 +3448,16 @@ impl<'a> Parser<'a> {
let lo = self.span;
let hi;
if self.check(&token::DotDot) {
if self.check(&token::DotDot) || self.token == token::DotDotDot {
if self.token == token::DotDotDot { // Issue #46718
let mut err = self.struct_span_err(self.span,
"expected field pattern, found `...`");
err.span_suggestion(self.span,
"to omit remaining fields, use one fewer `.`",
"..".to_owned());
err.emit();
}
self.bump();
if self.token != token::CloseDelim(token::Brace) {
let token_str = self.this_token_to_string();