Revert "Promote missing_fragment_specifier to hard error"

This reverts commit 02eae432e7.
2020-12-19 16:30:56 -05:00
parent 9414f0b833
commit f1eb88b28a
14 changed files with 90 additions and 32 deletions
--- a/compiler/rustc_expand/src/mbe.rs
+++ b/compiler/rustc_expand/src/mbe.rs
@@ -84,7 +84,7 @@ enum TokenTree {
    /// e.g., `$var`
    MetaVar(Span, Ident),
    /// e.g., `$var:expr`. This is only used in the left hand side of MBE macros.
-    MetaVarDecl(Span, Ident /* name to bind */, NonterminalKind),
+    MetaVarDecl(Span, Ident /* name to bind */, Option<NonterminalKind>),
 }

 impl TokenTree {