re PR c++/79474 (Multiple definitions of user-defined conversion operator cause…

re PR c++/79474 (Multiple definitions of user-defined conversion operator cause ICE (internal compiler error))

2017-10-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/79474
	* g++.dg/cpp1y/auto-fn44.C: New.

From-SVN: r253841

gcc/testsuite/ChangeLog

+2017-10-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/79474
+	* g++.dg/cpp1y/auto-fn44.C: New.
+
 2017-10-17  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.dg/attr-alloc_size-11.c: UnXFAIL for visium-*-*.

gcc/testsuite/g++.dg/cpp1y/auto-fn44.C

+// PR c++/79474
+// { dg-do compile { target c++14 } }
+
+struct Funject
+{  
+  operator auto() { return +[](bool b) {return b;}; }
+  operator auto() { return +[](bool b, bool, bool) {return b;}; }  // { dg-error "cannot be overloaded" }
+};
+
+Funject fun;
+auto bbb = fun(true);
+auto bbbb = fun(true, false, true);  // { dg-error "no match" }