Strip the comment when parse a macro

[Loaden]

Code

#ifndef _HAS_EXCEPTIONS
    #define  _HAS_EXCEPTIONS  1	/* predefine as 0 to disable exceptions */
#endif /* _HAS_EXCEPTIONS */

#define AAA 1
#define BBB 2
#define CCC 3

#define DDD AAA/*c style comment*/ + BBB \ /*test*/  \
    - CCC // c++ style comment

int main()
{
    return 0;
}

In this demo, we can't strip the comment when parser a macro.
Like this.

I make a patch for fix it.

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