Implement UDL changes from P0732R2.

Implementing the UDL changes was pretty straightforward; I simplified
cp_parser_userdef_string_literal using the releasing_vec type from mangle.c.

While looking at this, I realized that the string UDL template taking a
character pack that we implemented for C++14 didn't actually make it into
C++14, so I've added a pedwarn for it and no longer suggest it in the
diagnostic about an invalid UDL template.

	* cp-tree.h (struct releasing_vec): Move from mangle.c.
	Add get_ref method.
	* parser.c (cp_parser_userdef_string_literal): Use it.  Handle
	passing the string to a single template parameter of class type.
	(cp_parser_template_declaration_after_parameters): Allow it.
	Pedwarn about the character pack template that was proposed but not
	accepted for C++14, and don't suggest it.

From-SVN: r265790

1 files changed, 0 insertions, 24 deletions

diff --git a/gcc/cp/mangle.c b/gcc/cp/mangle.c
index 1b32301..b9d8ee2 100644
--- a/gcc/cp/mangle.c
+++ b/gcc/cp/mangle.c
@@ -1545,30 +1545,6 @@ write_abi_tags (tree tags)
   release_tree_vector (vec);
 }
 
-/* Simplified unique_ptr clone to release a tree vec on exit.  */
-
-struct releasing_vec
-{
-  typedef vec<tree, va_gc> vec_t;
-
-  releasing_vec (vec_t *v): v(v) { }
-  releasing_vec (): v(make_tree_vector ()) { }
-
-  /* Copy constructor is deliberately declared but not defined,
-     copies must always be elided.  */
-  releasing_vec (const releasing_vec &);
-
-  vec_t &operator* () const { return *v; }
-  vec_t *operator-> () const { return v; }
-  vec_t *get () const { return v; }
-  operator vec_t *() const { return v; }
-  tree& operator[] (unsigned i) const { return (*v)[i]; }
-
-  ~releasing_vec() { release_tree_vector (v); }
-private:
-  vec_t *v;
-};
-
 /* True iff the TREE_LISTS T1 and T2 of ABI tags are equivalent.  */
 
 static bool