* cp-tree.h (CP_INTEGRAL_TYPE_P): New macro.
	(ARITHMETIC_TYPE_P): Adjust definition for standard conformance.
	(strip_top_quals): Declare.
	(ncp_convert): Likewise.
	(type_after_usual_arithmetic_converions): Likewise.
	(composite_pointer_type): Likewise.
	* call.c (strip_top_quals): Don't make it static.
	(promoted_arithmetic_type_p): New function.
	(conditional_conversion): Likewise.
	(null_ptr_cst_p): Allow `false' as a NULL pointer constant.
	(standard_conversion): Use same_type_p.  Don't build BASE_CONVs
	for converting a type to itself.
	(reference_binding): Honor LOOKUP_NO_TEMP_BIND.
	(implicit_conversion): Make sure the from and to types are
	complete.
	(add_builtin_candidate): Correct handling of ?: operator.
	(add_builtin_candidates): Improve documentation.
	(build_conditional_expr): New function.
	(can_convert): Implement in terms of can_convert_arg.
	(ncp_convert): New function.
	* typeck.c (type_after_usual_arithmetic_conversions): New
	function, split out from common_type.
	(composite_pointer_type): New function, split out from
	build_conditional_expr.
	(common_type): Use type_after_usual_arithmetic_conversions.
	Remove redundant attribute merging.
	(comptypes): Tidy.  Handle COMPLEX_TYPE.
	(build_binary_op_nodefault): Use null_ptr_cst_p.
	(build_conditional_expr): Remove.
	(convert_for_assignment): Use new conversion functions.

	* cp-tree.h (abstract_virtuals_error): Change declaration.
	* typeck2.c (abstract_virtuals_error): Check to see if an error
	ocurred, and return a boolean value accordingly.
	(build_functional_cast): Adjust accordingly.
	* class.c (finish_struct_1): Likewise.
	* cvt.c (ocp_convert): Likewise.
	* decl.c (cp_finish_decl): Likewise.
	(grokparams): Likewise.
	(grok_op_properties): Likewise.
	(start_function): Likewise.
	* init.c (build_new_1): Likewise.

	* pt.c (unify): Don't get confused by pointers-to-member functions.

	* search.c (build_cplus_new): Robustify.

From-SVN: r28262