Apple

On 21 May 2006, at 18:05, Eric Albert wrote:

On May 21, 2006, at 5:54 AM, Jonathan Taylor wrote:

I see from the archives this sort of question has been asked before, but none of the answers seem to address my current problem.

I have a whole load of code which involves code similar to the following test case:

long bar(void) { return 2; }

void foo(void)
{
goto ExitLabel;
long temp = 1;
long temp2 = bar();
long temp3 = 3;
long temp4;
temp4 = 4;
ExitLabel:
return;
}
You're right...this is OK in C99. However, see below....

This is a C++ file. Unfortunately, C99 doesn't apply to C++ -- from a standards standpoint they're two different languages. I think they C++ folks are working on a revision which among other things will integrate C99 into the C++ standard, but they haven't finalized it yet so GCC doesn't support it today. I don't know if this is valid C++; it might be, in which case this is a compiler bug, but it might not be. It's certainly a little odd to get an error about jumping past the initialization of an unused variable.

You can work around this by renaming main.cpp to main.c or otherwise compiling it as C code, but I'm not sure if there's a way to make this work for C++ without changing the code.

-Eric

References:
	>crosses initialization (From: Jonathan Taylor <email@hidden>)
	>Re: crosses initialization (From: Eric Albert <email@hidden>)