error() = fn () noreturn
{
    #trap();
}

return_constant = fn () s32 // This is a comment
// This is a comment
{ // This is a comment
    // This is a comment
    return 0; // This is a comment
}// This is a comment
// This is a comment

constant_add = fn () s32
{
    return -1 + 1;
}

constant_and = fn () s32
{
    return 1 & 2;
}

constant_div = fn () s32
{
    return 0 / 5;
}

constant_mul = fn () s32
{
    return 1 * 0;
}

[export] main = fn [cc(c)]
{
    >rc = return_constant();
    if (rc != 0) error();

    >const_add = constant_add();
    if (const_add != 0) error();

    >const_and = constant_and();
    if (const_and != 0) error();

    >const_div = constant_div();
    if (const_div != 0) error();

    >const_mul = constant_mul();
    if (const_mul != 0) error();

    return 0;
}