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/* REQUIRED_ARGS: -preview=bitfields
*/
struct T
{
uint x : 2, y : 3, :0;
int :0;
}
uint foo(T s)
{
return s.x + s.y;
}
void test1()
{
T s;
s.x = 2;
s.y = 4;
uint u = foo(s);
assert(u == 6);
}
/********************************************/
struct S
{
uint a:3;
uint b:1;
ulong c:64;
int d:3;
int e:1;
long f:64;
int i;
alias f this;
}
static assert(S.a.min == 0);
static assert(S.a.max == 7);
static assert(S.b.min == 0);
static assert(S.b.max == 1);
static assert(S.c.min == 0);
static assert(S.c.max == ulong.max);
static assert(S.d.min == -4);
static assert(S.d.max == 3);
static assert(S.e.min == -1);
static assert(S.e.max == 0);
static assert(S.f.min == long.min);
static assert(S.f.max == long.max);
static assert(S.max == S.f.max);
void test2()
{
int x;
S effect()
{
++x;
return S();
}
assert(effect().a.max == 7);
assert(effect().i.max == int.max);
assert(x == 0); // ensure effect() was not executed
}
/********************************************/
struct U
{
int a;
int b:3, c:4;
this(this)
{
b = 2;
}
}
static assert(U.b.offsetof == 4);
static assert(U.b.sizeof == 4);
void test3()
{
U u;
u.c = 4;
U v = u;
assert(v.c == 4);
u = v;
assert(u.b == 2);
assert(__traits(getMember, u, "b") == 2);
}
/********************************************/
int main()
{
test1();
test2();
test3();
return 0;
}
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