syntax: Accept meta matchers in macros

This removes the `attr` matcher and adds a `meta` matcher. The previous `attr`
matcher is now ambiguous because it doesn't disambiguate whether it means inner
attribute or outer attribute.

The new behavior can still be achieved by taking an argument of the form
`#[$foo:meta]` (the brackets are part of the macro pattern).

Closes #13067

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsyntax/ext/tt/macro_parser.rs b/src/libsyntax/ext/tt/macro_parser.rs
index aa4f192f779..0d90093a40f 100644
--- a/src/libsyntax/ext/tt/macro_parser.rs
+++ b/src/libsyntax/ext/tt/macro_parser.rs
@@ -441,7 +441,7 @@ pub fn parse_nt(p: &mut Parser, name: &str) -> Nonterminal {
       "path" => {
         token::NtPath(~p.parse_path(LifetimeAndTypesWithoutColons).path)
       }
-      "attr" => token::NtAttr(@p.parse_attribute(false)),
+      "meta" => token::NtMeta(p.parse_meta_item()),
       "tt" => {
         p.quote_depth += 1u; //but in theory, non-quoted tts might be useful
         let res = token::NtTT(@p.parse_token_tree());