/* n_24.c:  # operator in macro definition. */

#include    "defs.h"

main( void)

{

    fputs( "started\n", stderr);

/* 24.1:    */

#define str( a)     # a

    assert( strcmp( str( a+b), "a+b") == 0);

/* 24.2:    White spaces between tokens of operand are converted to one space.

 */

    assert( strcmp( str(    ab  /* comment */   +

        cd  ), "ab + cd") == 0);

/* 24.3:    \ is inserted before \ and " in or surrounding literals and no

        other character is inserted to anywhere.    */

    assert( strcmp( str( '"' + "' \""), "'\"' + \"' \\\"\"") == 0);

/* 24.4:    Line splicing by <backslash><newline> is done prior to token

        parsing.   */

    assert( strcmp( str( "ab\

c"), "\"abc\"") == 0);

/* 24.5:    Token separator inserted by macro expansion should be removed.

        (Meanwhile, tokens should not be merged.  See 21.2.)    */

#define xstr( a)    str( a)

#define f(a)        a

    assert( strcmp( xstr( x-f(y)), "x-y") == 0);

    fputs( "success\n", stderr);

    return  0;

}