src/test/ui/expr/if/if-let.rs

   1 // check-pass
   2
   3 fn macros() {
   4     macro_rules! foo{
   5         ($p:pat, $e:expr, $b:block) => {{
   6             if let $p = $e $b
   7             //~^ WARN irrefutable `if let`
   8             //~| WARN irrefutable `if let`
   9         }}
  10     }
  11     macro_rules! bar{
  12         ($p:pat, $e:expr, $b:block) => {{
  13             foo!($p, $e, $b)
  14         }}
  15     }
  16
  17     foo!(a, 1, {
  18         println!("irrefutable pattern");
  19     });
  20     bar!(a, 1, {
  21         println!("irrefutable pattern");
  22     });
  23 }
  24
  25 pub fn main() {
  26     if let a = 1 { //~ WARN irrefutable `if let`
  27         println!("irrefutable pattern");
  28     }
  29
  30     if let a = 1 { //~ WARN irrefutable `if let`
  31         println!("irrefutable pattern");
  32     } else if true {
  33         println!("else-if in irrefutable `if let`");
  34     } else {
  35         println!("else in irrefutable `if let`");
  36     }
  37
  38     if let 1 = 2 {
  39         println!("refutable pattern");
  40     } else if let a = 1 { //~ WARN irrefutable `if let`
  41         println!("irrefutable pattern");
  42     }
  43
  44     if true {
  45         println!("if");
  46     } else if let a = 1 { //~ WARN irrefutable `if let`
  47         println!("irrefutable pattern");
  48     }
  49 }