gcc/testsuite/gdc.test/fail_compilation/nogc3.d

// REQUIRED_ARGS: -o-

/***************** AssignExp *******************/

/*
TEST_OUTPUT:
---
fail_compilation/nogc3.d(15): Error: setting `length` in `@nogc` function `nogc3.testArrayLength` may cause a GC allocation
fail_compilation/nogc3.d(16): Error: setting `length` in `@nogc` function `nogc3.testArrayLength` may cause a GC allocation
fail_compilation/nogc3.d(17): Error: setting `length` in `@nogc` function `nogc3.testArrayLength` may cause a GC allocation
---
*/
@nogc void testArrayLength(int[] a)
{
    a.length = 3;
    a.length += 1;
    a.length -= 1;
}

/***************** CallExp *******************/

void barCall();

/*
TEST_OUTPUT:
---
fail_compilation/nogc3.d(34): Error: `@nogc` function `nogc3.testCall` cannot call non-@nogc function pointer `fp`
fail_compilation/nogc3.d(35): Error: `@nogc` function `nogc3.testCall` cannot call non-@nogc function `nogc3.barCall`
---
*/
@nogc void testCall()
{
    auto fp = &barCall;
    (*fp)();
    barCall();
}

/****************** Closure ***********************/

@nogc void takeDelegate2(scope int delegate() dg) {}
@nogc void takeDelegate3(      int delegate() dg) {}

/*
TEST_OUTPUT:
---
fail_compilation/nogc3.d(52): Error: function `nogc3.testClosure1` is `@nogc` yet allocates closures with the GC
fail_compilation/nogc3.d(55):        nogc3.testClosure1.bar closes over variable x at fail_compilation/nogc3.d(54)
fail_compilation/nogc3.d(64): Error: function `nogc3.testClosure3` is `@nogc` yet allocates closures with the GC
fail_compilation/nogc3.d(67):        nogc3.testClosure3.bar closes over variable x at fail_compilation/nogc3.d(66)
---
*/
@nogc auto testClosure1()
{
    int x;
    int bar() { return x; }
    return &bar;
}
@nogc void testClosure2()
{
    int x;
    int bar() { return x; }
    takeDelegate2(&bar);     // no error
}
@nogc void testClosure3()
{
    int x;
    int bar() { return x; }
    takeDelegate3(&bar);
}

/****************** ErrorExp ***********************/

/*
TEST_OUTPUT:
---
fail_compilation/nogc3.d(85): Error: array literal in `@nogc` function `nogc3.foo13702` may cause a GC allocation
fail_compilation/nogc3.d(86): Error: array literal in `@nogc` function `nogc3.foo13702` may cause a GC allocation
fail_compilation/nogc3.d(92): Error: array literal in `@nogc` function `nogc3.bar13702` may cause a GC allocation
fail_compilation/nogc3.d(91): Error: array literal in `@nogc` function `nogc3.bar13702` may cause a GC allocation
---
*/
int[] foo13702(bool b) @nogc
{
    if (b)
        return [1];     // error
    return 1 ~ [2];     // error
}
int[] bar13702(bool b) @nogc
{
    if (b)
        return [1];     // error <- no error report
    auto aux = 1 ~ [2]; // error
    return aux;
}