Internal error: global void variable

[derrell]

This program generates an internal error. Note void global variable and incorrect syntax for draw_greenSquare function definition.

#include <stdio.h>
#include <draw.h>

void draw_green;

int main(int argc, char * argv[])
{     
    draw_greenSquare();
    return 0;
}

void draw_greenSquare
{
}

[ebertmi]

There must be an error with the function definition, I think the current implementation of the grammar allows the parsing of the malformed function definition.

[derrell]

Can you clarify? I'm not sure what you're saying.

If you're saying that it is valid to define a function as

void draw_greenSquare
{
}

then no, I don't believe that's the case (in ANSI C, which is what LearnCS! supports). The argument list parenthesis are required, and if no arguments, then the argument list must contain the keyword void.

The one I need to research is void draw_green; which doesn't make any intuitive sense (what storage size would it be?), but I'm not sure whether it's legal. (And if it's legal, what does it mean? I'm almost certain it's not legal.)

Regardless, a proper error message should be generated, not an internal error.

[ebertmi]

Yes I wanted to state out, that the the function definition without parenthesis is incorrect however gets parsed and produces no grammar error.