schwarze@isaak.uucp (Jochen Schwarze) (08/12/89)
Hello!
I just noticed, that it is obviously not possible to declare an
automatic variable of type pointer to function explicitly without
using a typedef. All other cases, both global and local static, and
even automatic declarations using a typedef work as expected.
Look at the following:
int func() { return 0; }
typedef int (*PFI)();
int (*global_explicit)() = &func;
PFI global_typedef = &func;
main()
{
static PFI static_typedef = &func;
static int (*static_explicit)() = &func;
PFI auto_typedef = &func;
int (*auto_explicit)() = &func; // error
}
Although all of the above declarations with initializations seem to
be valid, both AT&T cfront 1.2 and g++ 1.35.0 complain about the
last declaration:
cfront: error: auto_explicit is undefined
g++: `auto_explicit' was not declared
What's wrong about the above code? What am I missing?
Or are the compliers the ones to blame?
Jochen Schwarze, ISA GmbH, Stuttgart, West Germany
UUCP: schwarze@isaak.uucp
BITNET: schwarze%isaak.uucp@unido.bitnetjeffa@hpmwtd.HP.COM (Jeff Aguilera) (08/19/89)
> > Look at the following: > > > int func() { return 0; } > > typedef int (*PFI)(); > > int (*global_explicit)() = &func; > PFI global_typedef = &func; > > main() > { > static PFI static_typedef = &func; > static int (*static_explicit)() = &func; > > PFI auto_typedef = &func; > int (*auto_explicit)() = &func; // error > } > > > Although all of the above declarations with initializations seem to > be valid, both AT&T cfront 1.2 and g++ 1.35.0 complain about the > last declaration: > > cfront: error: auto_explicit is undefined > g++: `auto_explicit' was not declared > > What's wrong about the above code? What am I missing? > Or are the compliers the ones to blame? > Jochen Schwarze, ISA GmbH, Stuttgart, West Germany Works fine on my HP/350 using AT&T C++ 2.0. The regular HP-UX cc compiler complains about "& before array or function".
paul@gill.UUCP (Paul Nordstrom) (08/21/89)
In article <1520001@hpmwjaa.HP.COM>, jeffa@hpmwtd.HP.COM (Jeff Aguilera) writes: > > . . several function definitions . > > > > int (*auto_explicit)() = &func; // error > > > > Although all of the above declarations with initializations seem to > > be valid, both AT&T cfront 1.2 and g++ 1.35.0 complain about the > > last declaration: > > > > cfront: error: auto_explicit is undefined > > g++: `auto_explicit' was not declared > > > > What's wrong about the above code? What am I missing? > > Or are the compliers the ones to blame? > > Jochen Schwarze, ISA GmbH, Stuttgart, West Germany > > Works fine on my HP/350 using AT&T C++ 2.0. The regular HP-UX cc compiler > complains about "& before array or function". Also works fine on my Sun 3/60 with Oregon C++ ver 1.2Ag. Since the original code did not include any executable code, I didn't test to see if the code generated was or was not correct. Paul Nordstrom Gill & Co., L.P. uunet!gill!paul -- Paul Nordstrom Gill & Co., L.P. uunet!gill!paul