Fix pretty printing of empty type bound lists in where-clause

2022-06-16 17:14:51 -07:00
parent 1b8ca54002
commit fe9635f7c0
3 changed files with 76 additions and 50 deletions
--- a/compiler/rustc_parse/src/parser/diagnostics.rs
+++ b/compiler/rustc_parse/src/parser/diagnostics.rs
@@ -1355,7 +1355,10 @@ impl<'a> Parser<'a> {
                    s.print_mutability(mut_ty.mutbl, false);
                    s.popen();
                    s.print_type(&mut_ty.ty);
-                    s.print_type_bounds(" +", &bounds);
+                    if !bounds.is_empty() {
+                        s.word(" + ");
+                        s.print_type_bounds(&bounds);
+                    }
                    s.pclose()
                });