Class with pointer to function conversion operator

Class with pointer to function conversion operator

[John E. Potter]

See IS 13.3.1.1.2

This is not in the well known bugs and is an obscure enough and
old enough feature of C++ that I am assuming the bug still
exists.

John

$ g++ bad.egcs.cpp
bad.egcs.cpp: In function `int main()':
bad.egcs.cpp:13: no match for call to `(C) ()'
cc1plus: candidates are:  /* decl error */
$ g++ -v
Reading specs from
/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.0.0/egcs-2.91.55
/specs
gcc version egcs-2.91.55 19980824 (gcc2 ss-980609 experimental)
$ cat bad.egcs.cpp
typedef void (*FP)();
struct C {
        public:
                C(FP ap) : p(ap) { }
                operator FP() { return p; }
        private:
                FP p;
        };
void f () {
        }
int main () {
        C c(f);
        c();
        }

Re: Class with pointer to function conversion operator

[Valentin Bonnard]

Works fine for me:

$ cat > good.egcs.cpp
typedef void (*FP)();
struct C {
        public:
                C(FP ap) : p(ap) { }
                operator FP() { return p; }
        private:
                FP p;
        };
void f () {
        }
int main () {
        C c(f);
        c();
        }

$ eg++ good.egcs.cpp
$ eg++ -v           
Reading specs from
/usr/local/util/packages/egcs-19990620/lib/gcc-lib/sparc-sun-solaris2.5/gcc-2.95/specs
gcc version gcc-2.95 19990620 (prerelease)

-- 

Valentin Bonnard