src/tools/clippy/tests/ui/eq_op.rs

   1
   2
   3
   4 #[warn(eq_op)]
   5 #[allow(identity_op, double_parens, many_single_char_names)]
   6 #[allow(no_effect, unused_variables, unnecessary_operation, short_circuit_statement)]
   7 #[warn(nonminimal_bool)]
   8 fn main() {
   9     // simple values and comparisons
  10     1 == 1;
  11     "no" == "no";
  12     // even though I agree that no means no ;-)
  13     false != false;
  14     1.5 < 1.5;
  15     1u64 >= 1u64;
  16
  17     // casts, methods, parentheses
  18     (1 as u64) & (1 as u64);
  19     1 ^ ((((((1))))));
  20
  21     // unary and binary operators
  22     (-(2) < -(2));
  23     ((1 + 1) & (1 + 1) == (1 + 1) & (1 + 1));
  24     (1 * 2) + (3 * 4) == 1 * 2 + 3 * 4;
  25
  26     // various other things
  27     ([1] != [1]);
  28     ((1, 2) != (1, 2));
  29     vec![1, 2, 3] == vec![1, 2, 3]; //no error yet, as we don't match macros
  30
  31     // const folding
  32     1 + 1 == 2;
  33     1 - 1 == 0;
  34
  35     1 - 1;
  36     1 / 1;
  37     true && true;
  38
  39     true || true;
  40
  41
  42     let a: u32 = 0;
  43     let b: u32 = 0;
  44
  45     a == b && b == a;
  46     a != b && b != a;
  47     a < b && b > a;
  48     a <= b && b >= a;
  49
  50     let mut a = vec![1];
  51     a == a;
  52     2*a.len() == 2*a.len(); // ok, functions
  53     a.pop() == a.pop(); // ok, functions
  54
  55     use std::ops::BitAnd;
  56     struct X(i32);
  57     impl BitAnd for X {
  58         type Output = X;
  59         fn bitand(self, rhs: X) -> X {
  60             X(self.0 & rhs.0)
  61         }
  62     }
  63     impl<'a> BitAnd<&'a X> for X {
  64         type Output = X;
  65         fn bitand(self, rhs: &'a X) -> X {
  66             X(self.0 & rhs.0)
  67         }
  68     }
  69     let x = X(1);
  70     let y = X(2);
  71     let z = x & &y;
  72
  73     #[derive(Copy, Clone)]
  74     struct Y(i32);
  75     impl BitAnd for Y {
  76         type Output = Y;
  77         fn bitand(self, rhs: Y) -> Y {
  78             Y(self.0 & rhs.0)
  79         }
  80     }
  81     impl<'a> BitAnd<&'a Y> for Y {
  82         type Output = Y;
  83         fn bitand(self, rhs: &'a Y) -> Y {
  84             Y(self.0 & rhs.0)
  85         }
  86     }
  87     let x = Y(1);
  88     let y = Y(2);
  89     let z = x & &y;
  90 }