Re: Odd vc6 preprocessor bug

From: the_dilster (dylan_at_[hidden])
Date: 2001-12-05 01:50:05

--- In boost_at_y..., "David Abrahams" <david.abrahams_at_r...> wrote:
> int f(char*);
> #define foo(expr) if (!(expr)) { f(#expr); }
> int main()
> {
>     foo( f( "echo x \">\" foo.bar" ) );
> }
> 
> yeilds:
> 
> error C2146: syntax error : missing ')' before identifier 'foo'
> 
> So, it's not just Metrowerks ;-)
> 
It can't seem to handle stringizing a string literal with more than 
one escaped double-quote - although \042 works fine (assuming ascii 
character set).
One question though, does the standard actually expressly state that 
the "stringized" version contains all the escape characters too? And 
is there a way of stringizing something after the escape characters 
have been processed? I'm guessing not because it would produce some 
weird things:

Assertion failed: f("echo x ">" foo.bar"), file ...

as opposed to 

Assertion failed: f("echo x \">\" foo.bar"), file ...