PR c++/14545
	* parser.c (cp_parser_functional_cast): A cast to anything
	but integral or enumaration type is not an integral constant
	expression.
	* pt.c (value_dependent_expression_p): Handle cast expressions
	without operands (such as "int()").

	PR c++/14545
	* g++.dg/parse/template15.C: New test.

From-SVN: r79672