/* REQUIRED_ARGS: -verrors=0
TEST_OUTPUT:
---
fail_compilation/diag9679.d(93): Deprecation: `auto` and `ref` storage classes should be adjacent
fail_compilation/diag9679.d(93): Deprecation: `auto` and `ref` storage classes should be adjacent
fail_compilation/diag9679.d(94): Deprecation: `auto ref` return type must have `auto` and `ref` adjacent
fail_compilation/diag9679.d(100): Deprecation: `auto ref` return type must have `auto` and `ref` adjacent
fail_compilation/diag9679.d(16): Error: rvalue `1` cannot be assigned to `ref n`
fail_compilation/diag9679.d(17): Error: variable `diag9679.main.n` - storage class `auto` has no effect if type is not inferred, did you mean `scope`?
fail_compilation/diag9679.d(18): Error: variable `diag9679.main.S.a` - field declarations cannot be `ref`
fail_compilation/diag9679.d(25): Error: returning `r` escapes a reference to local variable `i`
---
*/
void main()
{
    if (ref n = 1) {}
    if (auto int n = 1) {}
    struct S { ref int a; }
}

ref int test2()
{
    int i;
    ref r = i;
    return r;
}

ref int test3()
{
    extern int i;
    ref r = i;
    return r;
}

struct S { int a; }

void test4()
{
    S s;
    ref int r1 = s.a;
    r1 = 3;
    __gshared S t2;
    ref int r2 = t2.a;
    static S t3;
    ref int r3 = t3.a;
    extern S t4;
    ref int r4 = t4.a;
}

/* TEST_OUTPUT:
---
fail_compilation/diag9679.d(66): Error: variable `diag9679.test5.r5` - initializer is required for `ref` variable
fail_compilation/diag9679.d(66): Error: rvalue `0` cannot be assigned to `ref r5`
fail_compilation/diag9679.d(71): Error: rvalue `4` cannot be assigned to `ref x`
fail_compilation/diag9679.d(72): Error: returning `x` escapes a reference to local variable `x`
fail_compilation/diag9679.d(77): Error: type `immutable(int)` cannot be assigned to `ref int x`
fail_compilation/diag9679.d(84): Error: returning `x` escapes a reference to local variable `x`
fail_compilation/diag9679.d(89): Error: variable `diag9679.test9.x` - void initializer not allowed for `ref` variable
fail_compilation/diag9679.d(90): Error: variable `diag9679.test9.y` - void initializer not allowed for `ref` variable
fail_compilation/diag9679.d(96): Error: variable `x` - `auto ref` variable must have `auto` and `ref` adjacent
---
*/

void test5()
{
    ref int r5;
}

ref int test6()
{
    ref int x = 4;
    return x;
}

void test7(immutable int y)
{
    ref int x = y;
    x = 5;
}

ref int test8()
{
    auto ref int x = 3;
    return x;
}

void test9()
{
    ref int x = void;
    auto ref int y = void;
}

void testKeywordOrder()(ref auto int x, auto const ref float y) {};
ref auto int testKeywordOrder()
{
    ref auto int x = 3;
    return 3;
}

auto { ref int autoFromScope() => 3; }