c/c++语言开发共享C中只有一次伪通用标头

这是一个问题，但是，当我前一段时间向你提出类似的问题时，我也对此事感兴趣。

我的结论是，如果你要使用许多不同类型的向量（或者使用更准确的命名，动态数组），那么将所有这些函数都转换为vector_##TYPE##_reserve() ， vector_##type##_resize()等…多次。

相反，使用类型的大小作为额外参数，将这些函数仅在单独的.c文件中定义一次更有效和干净。 这些函数在一个单独的.h文件中进行原型化。 然后，相同的.h文件将提供为您自己的类型生成函数包装器的宏，因此您不会使用该大小作为额外参数来查看它。

例如， vector.h标头将包含以下内容：

 /* Declare functions operating on a generic vector type */ void vector_generic_resize(void *vector, size_t size, size_t data_size); void vector_generic_push_back(void *vector, void *value, size_t data_size); void *vector_generic_pop_back(void *vector, size_t data_size); void vector_generic_init(void *vector, size_t size, size_t data_size); void vector_generic_destroy(void *vector) ; // I don't think data_size is needed here /* Taken from the example in the question */ #define VECTOR_DEFINITION(type) typedef struct { size_t size; size_t capacity; type *data; } vector_ ## type ## _t; /* Declare wrapper macros to make the above functions usable */ /* First the easy ones */ #define vector_resize(vector, size) vector_generic_resize(vector, size, sizeof(vector.data[0])) #define vector_init(vector, size) vector_generic_init(vector, size, sizeof(vector.data[0])) /* Type has to be given as an argument for the cast operator */ #define vector_pop_back(vector, type) (*(type*)(vector_generic_pop_back(vector, sizeof(vector.data[0])))) /* This one is tricky, if 'value' is a constant, it's address cannot be taken. I don't know if any better workarround is possible. */ #define vector_push_const(vector, type, value)  {  type temp = value;  vector_generic_push_back(vector, &temp, sizeof(vector.data[0])); } /* Equivalent macro, but for pushing variables instead of constants */ #define vector_push_var(vector, value) vector_generic_push_back(vector, &value, sizeof(vector.data[0])) /* Super-macro rediriging to constant or variable version of push_back depending on the context */ #define GET_MACRO(_1,_2,_3,NAME,...) NAME #define vector_push_back(...) GET_MACRO(__VA_ARGS__, vector_push_const, vector_push_var)(__VA_ARGS__) /* This macro isn't really needed, but just for homogenity */ #define vector_descroy(vector) vector_generic_destroy(vector) 

然后可以按照您在链接的示例中所说的那样使用这些函数，其中包含vector_generic_push_back的重要例外，遗憾的是每次都必须将该类型指定为额外的宏参数。

所以用这个解决方案

作为参考，您在问题中链接的示例中发布的主要function必须进行调整：

  #include  #include  #include "vector.h" typedef unsigned int uint; typedef char* str; VECTOR_DEFINITION(uint) VECTOR_DEFINITION(str) int main() { vector_uint_t vector; vector_init(&vector, 10); for (unsigned int i = 0; i < vector.size; ++i) vector.data[i] = i; for (unsigned int i = 0; i < 10; ++i) vector_push_back(&vector, i); /* When pushing back a constant, we *have* to specity the type */ /* It is OK to use C keywords as they are supressed by the preprocessor */ vector_push_back(&vector, unsigned int, 12); for (unsigned int i = 0; i < vector.size; ++i) printf("%d ", vector.data[i]); printf("n"); vector_destroy(&vector); vector_str_t sentence; vector_init(&sentence, 0); vector_push_back(&sentence, "Hello"); vector_push_back(&sentence, str, "World!"); /* Also possible, less efficient */ vector_push_back(&sentence, "How"); vector_push_back(&sentence, "are"); vector_push_back(&sentence, "you?"); for (unsigned int i = 0; i < sentence.size; ++i) printf("%s ", sentence.data[i]); printf("n"); vector_destroy(&sentence); return 0; } 

建议：

从vector.h文件中删除原型。

将原型放在vector.def文件的顶部。

从vector.h文件中删除typedef结构

将typedef结构放在vector.def文件中的原型之前。

然后，对于vector.h文件，多次#include语句将没有任何不良影响。

然后在每个要使用这些向量类型的源文件中使用以下内容：

 #include #define TYPE int #include #undef TYPE #define TYPE char #include #undef TYPE ... etc BTW: There is no library involved, so I'm a bit confused by the reference to 'library' in the question It may be worthwhile to also prefix the 'static' modifier to each of the function definitions so the definitions are not visible across source files It may be worthwhile to use parens around the parameters to TOKENPASTE so modifiers like 'static' and.or 'const' can be prefixed to the function names.