File: main.c

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#define CONCAT(a, b) a##b
#define CONCAT2(a, b) CONCAT(a, b)

#define STATIC_ASSERT(condition)                                               \
  int CONCAT2(some_array, __LINE__)[(condition) ? 1 : -1]

// C11:
// 6.3.1.2 Boolean type
// When any scalar value is converted to _Bool, the result is 0 if the value
// compares equal to 0; otherwise, the result is 1.

STATIC_ASSERT((_Bool)10);
STATIC_ASSERT(((_Bool)10)==1);
STATIC_ASSERT(!(_Bool)0);
STATIC_ASSERT((_Bool)0.1);
STATIC_ASSERT(!(_Bool)(int)0.1);
STATIC_ASSERT(!(_Bool)0.0);
STATIC_ASSERT(!(_Bool)-0.0);

// array to _Bool
char my_array[10];
STATIC_ASSERT((_Bool)my_array);

// pointer to _Bool
char my_array[10];
STATIC_ASSERT((_Bool)(int *)1);

int main()
{
}