contract C
{
    function f() public
    {
        int x = +(0, 0);
        int y = -(0, 0);
        (int z) = ~(0, 0);
        (int t) = !(0, 0);
    }
}
// ----
// SyntaxError: (59-66): Use of unary + is disallowed.
// TypeError: (59-66): Unary operator + cannot be applied to type tuple(int_const 0,int_const 0)
// TypeError: (51-66): Different number of components on the left hand side (1) than on the right hand side (2).
// TypeError: (84-91): Unary operator - cannot be applied to type tuple(int_const 0,int_const 0)
// TypeError: (76-91): Different number of components on the left hand side (1) than on the right hand side (2).
// TypeError: (111-118): Unary operator ~ cannot be applied to type tuple(int_const 0,int_const 0)
// TypeError: (101-118): Different number of components on the left hand side (1) than on the right hand side (2).
// TypeError: (138-145): Unary operator ! cannot be applied to type tuple(int_const 0,int_const 0)
// TypeError: (128-145): Different number of components on the left hand side (1) than on the right hand side (2).