| // Operator precedence of type ascription |
| // Type ascription has very high precedence, the same as operator `as` |
| |
| #![feature(type_ascription)] |
| |
| use std::ops::*; |
| |
| struct S; |
| struct Z; |
| |
| impl Add<Z> for S { |
| type Output = S; |
| fn add(self, _rhs: Z) -> S { panic!() } |
| } |
| impl Mul<Z> for S { |
| type Output = S; |
| fn mul(self, _rhs: Z) -> S { panic!() } |
| } |
| impl Neg for S { |
| type Output = Z; |
| fn neg(self) -> Z { panic!() } |
| } |
| impl Deref for S { |
| type Target = Z; |
| fn deref(&self) -> &Z { panic!() } |
| } |
| |
| fn main() { |
| &S: &S; // OK |
| (&S): &S; // OK |
| &(S: &S); //~ ERROR mismatched types |
| |
| *S: Z; // OK |
| (*S): Z; // OK |
| *(S: Z); //~ ERROR mismatched types |
| //~^ ERROR type `Z` cannot be dereferenced |
| |
| -S: Z; // OK |
| (-S): Z; // OK |
| -(S: Z); //~ ERROR mismatched types |
| //~^ ERROR cannot apply unary operator `-` to type `Z` |
| |
| S + Z: Z; // OK |
| S + (Z: Z); // OK |
| (S + Z): Z; //~ ERROR mismatched types |
| |
| S * Z: Z; // OK |
| S * (Z: Z); // OK |
| (S * Z): Z; //~ ERROR mismatched types |
| |
| S .. S: S; // OK |
| S .. (S: S); // OK |
| (S .. S): S; //~ ERROR mismatched types |
| } |