Array types are pointers for _Generic and others. about cake

[thradams]

It is necessary to add unit tests on type_lvalue_conversion.

[thradams]

Test program

#include <stdio.h>

#define TYPENAME(E)\
_Generic(E,\
       int [2] : "int [2]",\
       const int : "const int",\
       int : "int",\
       char  *:"char *",\
       int * : "int *",\
       const int *:"const int *",\
       const int (*)[5] : "const int (*)[5]",\
       int (*)(void) : "int (*)(void)",\
       default: "none"\
       )
#pragma expand TYPENAME

int main(void)
{
    struct X {
        int a[2];
    } x;
    
    printf("%s\n", TYPENAME((int const){0}));

    printf("%s\n", TYPENAME(x.a));
    
    printf("%s\n", TYPENAME(main));
    printf("%s\n", TYPENAME(&main));

    printf("%s\n", TYPENAME("text"));    

    int * const p;
    printf("%s\n", TYPENAME(p));

    const int i;
    printf("%s\n", TYPENAME(i));
    printf("%s\n", TYPENAME(&i));


    int a[5];
    printf("%s\n", TYPENAME(a));
    printf("%s\n", TYPENAME(&a));

    const int ca[5];
    printf("%s\n", TYPENAME(ca));
    printf("%s\n", TYPENAME(&ca));

}