commit 120812acdc3feda6cd79f634a4ac26ae0db8c087
Author: Jason Merrill <jason@redhat.com>
Date: Fri May 20 14:00:38 2016 -0400
PR c++/70735 - generic lambda and local static variable
* pt.c (tsubst_copy): Just return a local variable from
non-template context. Don't call rest_of_decl_compilation for
duplicated static locals.
(tsubst_decl): Set DECL_CONTEXT of local static from another
function.
@@ -12280,6 +12280,14 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
local_p = true;
/* Subsequent calls to pushdecl will fill this in. */
ctx = NULL_TREE;
+ /* Unless this is a reference to a static variable from an
+ enclosing function, in which case we need to fill it in now. */
+ if (TREE_STATIC (t))
+ {
+ tree fn = tsubst (DECL_CONTEXT (t), args, complain, in_decl);
+ if (fn != current_function_decl)
+ ctx = fn;
+ }
spec = retrieve_local_specialization (t);
}
/* If we already have the specialization we need, there is
@@ -13991,7 +13999,8 @@ tsubst_copy (tree t, tree args, tsubst_flags_t complain, tree in_decl)
case FUNCTION_DECL:
if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t))
r = tsubst (t, args, complain, in_decl);
- else if (local_variable_p (t))
+ else if (local_variable_p (t)
+ && uses_template_parms (DECL_CONTEXT (t)))
{
r = retrieve_local_specialization (t);
if (r == NULL_TREE)
@@ -14035,14 +14044,9 @@ tsubst_copy (tree t, tree args, tsubst_flags_t complain, tree in_decl)
gcc_assert (cp_unevaluated_operand || TREE_STATIC (r)
|| decl_constant_var_p (r)
|| errorcount || sorrycount);
- if (!processing_template_decl)
- {
- if (TREE_STATIC (r))
- rest_of_decl_compilation (r, toplevel_bindings_p (),
- at_eof);
- else
- r = process_outer_var_ref (r, complain);
- }
+ if (!processing_template_decl
+ && !TREE_STATIC (r))
+ r = process_outer_var_ref (r, complain);
}
/* Remember this for subsequent uses. */
if (local_specializations)
new file mode 100644
@@ -0,0 +1,13 @@
+// PR c++/70735
+// { dg-do run { target c++1y } }
+
+int main()
+{
+ static int a;
+ auto f = [](auto) { return a; };
+ if (f(0) != 0)
+ __builtin_abort();
+ a = 1;
+ if (f(0) != 1)
+ __builtin_abort();
+}
new file mode 100644
@@ -0,0 +1,19 @@
+// PR c++/70735
+// { dg-do run { target c++1y } }
+
+template <class T>
+static void g()
+{
+ static int a;
+ auto f = [](auto) { return a; };
+ if (f(0) != 0)
+ __builtin_abort();
+ a = 1;
+ if (f(0) != 1)
+ __builtin_abort();
+}
+
+int main()
+{
+ g<int>();
+}