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tinycc/tests/tests2/94_generic.c
matthias fdc18d307a mutiples fix for _Generic
* check that _Generic don't match unsigned char * with char *
  this case is usefull as with -funsigned-char, 'char *' are unsigned

* change VT_LONG so it's now a qualifier

  VT_LONG are never use for code generation, but only durring parsing state,
  in _Generic we need to be able to make diference between
  'long' and 'long long'
  So VT_LONG is now use as a type qualifier, it's old behaviour is still
  here, but we can keep trace of what was a long and what wasn't

* add TOK_CLONG and TOK_CULONG

  tcc was directly converting value like '7171L' into TOK_CLLONG or
  TOK_CINT depending of the machine architecture.

  because of that, we was unable to make diference between a long and a
  long long, which doesn't work with _Generic.

  So now 7171L is a TOK_CLONG, and we can handle _Generic properly

* check that _Generic can make diference between long and long long

* uncomment "type match twice" as it should now pass tests on any platforms

* add inside_generic global

  the point of this variable is to use VT_LONG in comparaison only
  when we are evaluating a _Generic.
  problem is with my lastest patchs tcc can now make the diference between
  a 'long long' and a 'long', but in 64 bit stddef.h typedef uint64_t as
  typedef signed long long int int64_t and stdint.h as unsigned long int, so tcc
  break when stdint.h and stddef.h are include together.

  Another solution woud be to modifie include/stddef.h so it define uint64_t as
  unsigned long int when processor is 64 bit, but this could break some
  legacy code, so for now, VT_LONG are use only inside generc.

* check that _Generic parse first argument correctly

* check that _Generic evaluate correctly exresion like "f() / 2"
2017-07-21 19:30:31 +02:00

62 lines
1.2 KiB
C

#include <stdio.h>
const int a = 0;
struct a {
int a;
};
struct b {
int a;
};
int a_f()
{
return 20;
}
int b_f()
{
return 10;
}
typedef int int_type1;
#define gen_sw(a) _Generic(a, const char *: 1, default: 8, int: 123);
int main()
{
int i = 0;
struct b titi;
const int * const ptr;
const char *ti;
int_type1 i2;
i = _Generic(a, int: a_f, const int: b_f)();
printf("%d\n", i);
i = _Generic(a, int: a_f() / 2, const int: b_f() / 2);
printf("%d\n", i);
i = _Generic(ptr, int *:1, int * const:2, default:20);
printf("%d\n", i);
i = gen_sw(a);
printf("%d\n", i);
i = _Generic(titi, struct a:1, struct b:2, default:20);
printf("%d\n", i);
i = _Generic(i2, char: 1, int : 0);
printf("%d\n", i);
i = _Generic(a, char:1, int[4]:2, default:5);
printf("%d\n", i);
i = _Generic(17, int :1, int **:2);
printf("%d\n", i);
i = _Generic(17L, int :1, long :2, long long : 3);
printf("%d\n", i);
i = _Generic("17, io", char *: 3, const char *: 1);
printf("%d\n", i);
i = _Generic(ti, const unsigned char *:1, const char *:4, char *:3,
const signed char *:2);
printf("%d\n", i);
printf("%s\n", _Generic(i + 2L, long: "long", int: "int",
long long: "long long"));
return 0;
}