Problem passing a reference as a named parameter to a variadic function
- by Michael Mrozek
I'm having problems in Visual Studio 2003 with the following:
void foo(const char*& str, ...) {
va_list args;
va_start(args, str);
const char* foo;
while((foo = va_arg(args, const char*)) != NULL) {
printf("%s\n", foo);
}
}
When I call it:
const char* one = "one";
foo(one, "two", "three", NULL);
I get:
Access violation reading location 0xcccccccc
on the printf() line -- va_arg() returned 0xcccccccc. I finally discovered it's the first parameter being a reference that breaks it -- if I make it a normal char* everything is fine. It doesn't seem to matter what the type is; being a reference causes it to fail at runtime. Is this a known problem with VS2003, or is there some way in which that's legal behavior? It doesn't happen in GCC; I haven't tested with newer Visual Studios to see if the behavior goes away
