/* e_18_4.t:    #define syntax errors.  */

/* 18.4:    Not an identifier.  */

#define "string"

#define 123

/* 18.5:    No argument.    */

#define

/* 18.6:    Empty parameter list.   */

#define math( op, a, )      op( (a), (b))

/* 18.7:    Duplicate parameter names.  */

#define math( op, a, a)     op( (a), (b))

/* 18.8:    Argument is not an identifier.  */

#define NUMARGS( 1, +, 2)   (1 + 2)

/* 18.9:    No space between macro name and replacement text.   */

/*

    C90 (Corrigendum 1) forbids this if and only the replacement text begins

        with a non-basic-character.

    C99 forbids this even when the replacement text begins with basic-

        character.

*/

/*  From ISO 9899:1990 / Corrigendum 1. */

#define THIS$AND$THAT(a, b)     ((a) + (b))

/* Note: the following definition is legal (object-like macro).

#define THIS $AND$THAT(a, b)    ((a) + (b))

*/