c++/8856: g++ accepts invalid conversion-function-id

[Martin von Loewis <loewis@informatik.hu-berlin.de>]

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>Number:         8856
>Category:       c++
>Synopsis:       g++ accepts invalid conversion-function-id
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          accepts-illegal
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 07 03:36:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Martin v. Löwis
>Release:        3.1
>Organization:
>Environment:
System: SunOS paros 5.9 Generic_112233-02 sun4u sparc SUNW,Sun-Blade-1000
Architecture: sun4

host: sparc-sun-solaris2.8
build: sparc-sun-solaris2.8
target: sparc-sun-solaris2.8
configured with: ../configure --host=sparc-sun-solaris2.8 --enable-shared --enable-threads --with-cpu=v8 --with-gnu-ld --with-gnu-as --enable-version-specific-runtime-libs
>Description:
	The following program is accepted, even though operator double<int>
	is not a valid conversion-function-id (as double is not a template).

#include <stdio.h>

template <class T> struct A {
    template <class U> operator U() { return sizeof(U); }
};


int main() {
  A<double> a;
  int x = a.A<double>::operator int();
  double y = a.A<double>::operator double();
  int z = a.A<double>::operator double<int>();
  printf("%d %f %d\n", x, y, z);
}

>How-To-Repeat:
	Compile the above program.
>Fix:
	Work-around: don't use the construct.
>Release-Note:
>Audit-Trail:
>Unformatted: