Various small C++ changes.

Wrappers for lookup_qualified_name and build_x_binary_op to make calling
them more convenient in places, and a function named contextual_conv_bool
for places that want contextual conversion to bool.

I noticed that we weren't showing the declaration location when we complain
about a call to a non-constexpr function where a constant expression is
required.

If maybe_instantiate_noexcept doesn't actually instantiate, there's no
reason for it to mess with clones.

	* constexpr.c (explain_invalid_constexpr_fn): Show location of fn.

	* pt.c (maybe_instantiate_noexcept): Only update clones if we
	instantiated.

	* typeck.c (contextual_conv_bool): New.

	* name-lookup.c (lookup_qualified_name): Add wrapper overload taking
	C string rather than identifier.
	* parser.c (cp_parser_userdef_numeric_literal): Use it.
	* rtti.c (emit_support_tinfos): Use it.
	* cp-tree.h (ovl_op_identifier): Change to inline functions.
	(build_x_binary_op): Add wrapper with fewer parms.

From-SVN: r277862

1 files changed, 4 insertions, 1 deletions

diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index 72de2ef..ce910cd 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -934,7 +934,10 @@ explain_invalid_constexpr_fn (tree fun)
   if (!DECL_DEFAULTED_FN (fun)
       && !LAMBDA_TYPE_P (CP_DECL_CONTEXT (fun))
       && !is_instantiation_of_constexpr (fun))
-    return;
+    {
+      inform (DECL_SOURCE_LOCATION (fun), "%qD declared here", fun);
+      return;
+    }
   if (diagnosed == NULL)
     diagnosed = new hash_set<tree>;
   if (diagnosed->add (fun))