PR c++/60627
* parser.c (cp_parser_parameter_declaration_clause): Prevent 'auto' from
introducing an implicit function template parameter within an explicit
instantiation.
PR c++/60627
* g++.dg/cpp1y/pr60627.C: New testcase.
---
gcc/cp/parser.c | 4 +++-
gcc/testsuite/g++.dg/cpp1y/pr60627.C | 12 ++++++++++++
2 files changed, 15 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/g++.dg/cpp1y/pr60627.C
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 36872c9..efb7b39 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -18207,7 +18207,9 @@ cp_parser_parameter_declaration_clause (cp_parser*
parser)
(void) cleanup;
- if (!processing_specialization && !processing_template_parmlist)
+ if (!processing_specialization
+ && !processing_template_parmlist
+ && !processing_explicit_instantiation)
if (!current_function_decl
|| (current_class_type && LAMBDA_TYPE_P (current_class_type)))
parser->auto_is_implicit_function_template_parm_p = true;
diff --git a/gcc/testsuite/g++.dg/cpp1y/pr60627.C
b/gcc/testsuite/g++.dg/cpp1y/pr60627.C
new file mode 100644
index 0000000..9e2116e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1y/pr60627.C
@@ -0,0 +1,12 @@
+// PR c++/60627
+// { dg-do compile { target c++1y } }
+// { dg-options "" }
+
+template<typename T> void foo(T) {}
+
+template void foo(auto); // { dg-error "auto|does not match" }
+
+void bar()
+{
+ foo(0);
+}
--
1.9.0
