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

/*
FIXME: DMD host compilers < 2.073 with faulty optimization
lead to unfortunate test failures, see
https://github.com/dlang/dmd/pull/6831#issuecomment-304495842.

DISABLED: win32 win64 linux osx freebsd
*/

/*
TEST_OUTPUT:
---
fail_compilation/impconv.d(30): Error: function `impconv.foo_float(float)` is not callable using argument types `(int)`
fail_compilation/impconv.d(30):        cannot pass argument `-2147483647` of type `int` to parameter `float`
fail_compilation/impconv.d(31): Error: function `impconv.foo_float(float)` is not callable using argument types `(uint)`
fail_compilation/impconv.d(31):        cannot pass argument `4294967295u` of type `uint` to parameter `float`
fail_compilation/impconv.d(34): Error: function `impconv.foo_double(double)` is not callable using argument types `(long)`
fail_compilation/impconv.d(34):        cannot pass argument `-9223372036854775807L` of type `long` to parameter `double`
fail_compilation/impconv.d(35): Error: function `impconv.foo_double(double)` is not callable using argument types `(ulong)`
fail_compilation/impconv.d(35):        cannot pass argument `18446744073709551615LU` of type `ulong` to parameter `double`
---
*/

void foo_float(float);
void foo_double(double);
void foo_real(real);

void main()
{
    foo_float(1);        // implicitly convertible to float
    foo_float(-int.max); // -(2^31 - 1)
    foo_float(uint.max); // 2^32 - 1

    foo_double(int.max);   // implicitly convertible to double
    foo_double(-long.max); // -(2^63 - 1)
    foo_double(ulong.max); // 2^64 - 1

    foo_real(0xffff_ffff_ffffL); // 2^48 - 1, implicitly convertible to real
    static assert(__traits(compiles, foo_real(-long.max)) == (real.mant_dig >= 63));
    static assert(__traits(compiles, foo_real(ulong.max)) == (real.mant_dig >= 64));
}