Boolean.c

#include "Boolean.h"

struct Boolean Boolean = {
        0,
        1,
};

Boolean.h

#ifndef UNTITLED1_BOOLEAN_H
#define UNTITLED1_BOOLEAN_H

typedef struct boolean {
    int value;
};

struct Boolean {
    int true;
    int false;
};

extern struct Boolean Boolean;

#endif

C11 Generic Example

#include <stdio.h>

#define typename(x) _Generic((x),        /* Get the name of a type */             \
                                                                                  \
         char: "unsigned char",                                                   \
         char: "char",                     signed char: "signed char",            \
    short int: "short int",         unsigned short int: "unsigned short int",     \
          int: "int",                     unsigned int: "unsigned int",           \
     long int: "long int",           unsigned long int: "unsigned long int",      \
long long int: "long long int", unsigned long long int: "unsigned long long int", \
        float: "float",                         double: "double",                 \
  long double: "long double",                   char *: "pointer to char",        \
       void *: "pointer to void",                int *: "pointer to int",         \

int main() {
    char* s = typename(char);
    printf("Hello, World!\n");
    return 0;
}

gistfile1.txt

#include "Boolean.h"

struct Boolean Boolean = {
        0,
        1,
};

#ifndef UNTITLED1_BOOLEAN_H
#define UNTITLED1_BOOLEAN_H

typedef struct boolean {
    int value;
};

struct Boolean {
    int true;
    int false;
};

extern struct Boolean Boolean;

#endif