我寫這兩個宏:C宏:函數工廠,爲什麼宏只在一種情況下工作?
// Magic Assert Equal Atomic constructor generator
#define _GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(n, N, W, tt) \
assert_data_t *assert_eq_##n##_constructor (tt a, tt b, int passed) { \
return assert_data_constructor (_ASSERT_EQ_##N##_, passed, W(a), W(b)); \
}
// Magic Assert Equal Vector constructor generator
#define _GENERIC_ASSERT_EQ_VECTOR_CONSTRUCTOR_(n, N, W, tt) \
assert_data_t *assert_eq_##n##_vector_constructor \
(tt * a, tt * b, int n, int passed) { \
return assert_data_constructor \
(_ASSERT_EQ_##N##_VECTOR_, passed, W##Vector(a, n), W##Vector(b, n)); \
}
第一個宏效果很好(在情況下,我已經試過):
_GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(int, INT, Int, int)
_GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(flt, FLT, Flt, float)
_GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(dbl, DBL, Dbl, double)
_GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(complex_flt, COMPLEX_FLT, ComplexFlt, complex float)
_GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(complex_dbl, COMPLEX_DBL, ComplexDbl, complex double)
_GENERIC_ASSERT_EQ_ATOMIC_CONSTRUCTOR_(str, STR, Str, char *)
,但第二個宏...沒有按在'int'情況下工作得很好(帶有浮點數和雙精度是):
_GENERIC_ASSERT_EQ_VECTOR_CONSTRUCTOR_(int, INT, Int, int) // Here i have an error
_GENERIC_ASSERT_EQ_VECTOR_CONSTRUCTOR_(flt, FLT, Flt, float)
_GENERIC_ASSERT_EQ_VECTOR_CONSTRUCTOR_(dbl, DBL, Dbl, double)
gcc向我顯示的錯誤s:
unitarium4c.c:115: error: two or more data types in declaration specifiers unitarium4c.c: In function ‘assert_eq_int_vector_constructor’: unitarium4c.c:115: error: parameter name omitted unitarium4c.c:115: error: expected expression before ‘int’ unitarium4c.c:115: error: expected expression before ‘int’
:p我不明白爲什麼會出現這種錯誤。 (如果我複製宏並擴展它,它在'int'情況下效果很好)。
在此先感謝:)。
謝謝,這是真的:) – castarco 2010-12-07 23:27:14