[gcc r14-2118] gengtype: Handle braced initialisers in structs

[gcc r14-2118] gengtype: Handle braced initialisers in structs

[Richard Sandiford]

https://gcc.gnu.org/g:ebe7c586f62b1c5218b19c3c6853163287b3c887

commit r14-2118-gebe7c586f62b1c5218b19c3c6853163287b3c887
Author: Richard Sandiford <richard.sandiford@arm.com>
Date:   Tue Jun 27 08:54:20 2023 +0100

    gengtype: Handle braced initialisers in structs
    
    I have a patch that adds braced initialisers to a GTY structure.
    gengtype didn't accept that, because it parsed the "{ ... }" in
    " = { ... };" as the end of a statement (as "{ ... }" would be in
    a function definition) and so it didn't expect the following ";".
    
    This patch explicitly handles initialiser-like sequences.
    
    Arguably, the parser should also skip redundant ";", but that
    feels more like a workaround rather than the real fix.
    
    gcc/
            * gengtype-parse.cc (consume_until_comma_or_eos): Parse "= { ... }"
            as a probable initializer rather than a probable complete statement.

Diff:
---
 gcc/gengtype-parse.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gcc/gengtype-parse.cc b/gcc/gengtype-parse.cc
index 2b2156c5f45..19184d77899 100644
--- a/gcc/gengtype-parse.cc
+++ b/gcc/gengtype-parse.cc
@@ -450,6 +450,12 @@ consume_until_comma_or_eos ()
 	parse_error ("unexpected end of file while scanning for ',' or ';'");
 	return false;
 
+      case '=':
+	advance ();
+	if (token () == '{')
+	  consume_balanced ('{', '}');
+	break;
+
       default:
 	advance ();
 	break;