auto merge of #15098 : ben0x539/rust/nullary-tuple-struct, r=pcwalton

Reject `struct Foo();` to fix #15095.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 043ce3bf5b0..4a75473ac11 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -4116,6 +4116,11 @@ impl<'a> Parser<'a> {
                 };
                 spanned(lo, p.span.hi, struct_field_)
             });
+            if fields.len() == 0 {
+                self.fatal(format!("unit-like struct definition should be \
+                                    written as `struct {};`",
+                                   token::get_ident(class_name)).as_slice());
+            }
             self.expect(&token::SEMI);
         } else if self.eat(&token::SEMI) {
             // It's a unit-like struct.