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/* Copyright (C) 2000 Free Software Foundation, Inc. */
/* { dg-do run } */
/* { dg-options "-std=c99 -pedantic-errors" } */
/* Test ## behavior and corner cases thoroughly. The macro expander
failed many of these during development. */
#ifndef __WCHAR_TYPE__
#define __WCHAR_TYPE__ int
#endif
typedef __WCHAR_TYPE__ wchar_t;
extern int strcmp (const char *, const char *);
#if DEBUG
extern int puts (const char *);
#else
#define puts(X)
#endif
extern void abort (void);
#define err(str) do { puts(str); abort(); } while (0)
#define EMPTY
#define str(x) #x
#define xstr(x) str(x)
#define glue(x, y) x ## y
#define xglue(x, y) glue (x, y)
#define glue3(x, y, z) x ## y ## z
#define glue_var(x, ...) x ## __VA_ARGS__
#define __muldi3 __NDW(mul, 3 = 50)
#define __NDW(a,b) __ ## a ## di ## b
#define m3 NDW()
#define NDW(x) m3 ## x = 50
#define five 5
#define fifty int fif ## ty
/* Defines a function called glue, returning what it is passed. */
int glue (glue,) (int x)
{
return x;
}
int main ()
{
/* m3 and __muldi3 would sometimes cause an infinite loop. Ensure
we only expand fifty once. */
fifty = 50, m3, __muldi3;
/* General glue and macro expanding test. */
int five0 = xglue (glue (fi, ve), 0);
/* Tests only first and last tokens are pasted, and pasting to form
the != operator. Should expand to: if (five0 != 50). */
if (glue3 (fi, ve0 !,= glue (EMPTY 5, 0)))
err ("five0 != 50");
/* Test varags pasting, and pasting to form the >> operator. */
if (glue_var(50 >, > 1 != 25))
err ("Operator >> pasting");
/* The LHS should not attempt to expand twice, and thus becomes a
call to the function glue. */
if (glue (gl, ue) (12) != 12)
err ("Recursive macros");
/* Test placemarker pasting. The glued lines should all appear
neatly in the same column and below each other, though we don't
test that here. */
{
int glue3(a, b, ) = 1, glue3(a,,) = 1;
glue3(a, , b)++;
glue3(, a, b)++;
glue3(,a,)++;
glue3(,,a)++;
if (a != 3 || ab != 3 glue3(,,))
err ("Placemarker pasting");
}
/* Test that macros in arguments are not expanded. */
{
int glue (EMPTY,1) = 123, glue (T, EMPTY) = 123;
if (EMPTY1 != 123 || TEMPTY != 123)
err ("Pasted arguments macro expanding");
}
/* Test various paste combinations. */
{
const wchar_t* wc_array = glue(L, "wide string");
wchar_t wc = glue(L, 'w');
const char * hh = xstr(xglue(glue(%, :), glue(%, :)));
int array glue (<, :) 1 glue (:, >) = glue(<, %) 1 glue(%, >);
int x = 4;
if (array[0] != 1)
err ("Digraph pasting");
x glue (>>, =) 1; /* 2 */
x glue (<<, =) 1; /* 4 */
x glue (*, =) 2; /* 8 */
x glue (+, =) 100; /* 108 */
x glue (-, =) 50; /* 58 */
x glue (/, =) 2; /* 29 */
x glue (%, =) 20; /* 9 */
x glue (&, =) 254; /* 8 */
x glue (|, =) 16; /* 24 */
x glue (^, =) 18; /* 10 */
if (x != 10 || 0 glue (>, =) 1 glue (|, |) 1 glue (<, =) 0)
err ("Various operator pasting");
if (strcmp (hh, "%:%:"))
err ("Pasted digraph spelling");
if ((glue (., 1) glue (!, =) .1))
err ("Pasted numbers 1");
/* glue3 here will only work if we paste left-to-right. If a
future implementation does not do this, change the test. */
if (glue3 (1.0e, +, 1) != 10.0)
err ("Pasted numbers 2");
}
return 0;
}
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