From a137d00ce52e9db78bb803d1384fdf3a4c4e63ea Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Tue, 22 May 2018 08:01:21 -0700
Subject: rustc: Correctly pretty-print macro delimiters

This commit updates the `Mac_` AST structure to keep track of the delimiters
that it originally had for its invocation. This allows us to faithfully
pretty-print macro invocations not using parentheses (e.g. `vec![...]`). This in
turn helps procedural macros due to #43081.

Closes #50840
---
 src/libsyntax/ext/placeholders.rs | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/libsyntax/ext')

diff --git a/src/libsyntax/ext/placeholders.rs b/src/libsyntax/ext/placeholders.rs
index 9f60882ca29..5c1c661fffd 100644
--- a/src/libsyntax/ext/placeholders.rs
+++ b/src/libsyntax/ext/placeholders.rs
@@ -27,6 +27,7 @@ pub fn placeholder(kind: ExpansionKind, id: ast::NodeId) -> Expansion {
         dummy_spanned(ast::Mac_ {
             path: ast::Path { span: DUMMY_SP, segments: Vec::new() },
             tts: TokenStream::empty().into(),
+            delim: ast::MacDelimiter::Brace,
         })
     }
 
-- 
cgit 1.4.1-3-g733a5