Hi!
In param_list some entries could be error_mark_node, we should just ignore
those. ALso, this patch optimizes by testing cxx_dialect < cxx14 just once.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2016-10-03 Jakub Jelinek <ja...@redhat.com>
PR c++/77791
* parser.c (cp_parser_lambda_declarator_opt): Only pedwarn
for C++11 on decls in the param_list. Test cxx_dialect < cxx14 before
the loop just once.
* g++.dg/cpp0x/lambda/lambda-77791.C: New test.
--- gcc/cp/parser.c.jj 2016-09-27 21:09:59.000000000 +0200
+++ gcc/cp/parser.c 2016-10-03 15:00:31.759317804 +0200
@@ -10114,10 +10114,11 @@ cp_parser_lambda_declarator_opt (cp_pars
/* Default arguments shall not be specified in the
parameter-declaration-clause of a lambda-declarator. */
- for (tree t = param_list; t; t = TREE_CHAIN (t))
- if (TREE_PURPOSE (t) && cxx_dialect < cxx14)
- pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_Wpedantic,
- "default argument specified for lambda parameter");
+ if (cxx_dialect < cxx14)
+ for (tree t = param_list; t; t = TREE_CHAIN (t))
+ if (TREE_PURPOSE (t) && DECL_P (TREE_VALUE (t)))
+ pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_Wpedantic,
+ "default argument specified for lambda parameter");
cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
--- gcc/testsuite/g++.dg/cpp0x/lambda/lambda-77791.C.jj 2016-10-03
15:01:21.831694292 +0200
+++ gcc/testsuite/g++.dg/cpp0x/lambda/lambda-77791.C 2016-10-03
14:58:22.000000000 +0200
@@ -0,0 +1,4 @@
+// PR c++/77791
+// { dg-do compile { target c++11 } }
+
+auto a = [] (int i, int i = 0) {}; // { dg-error "redefinition of" }
Jakub
