src/test/ui/point-to-type-err-cause-on-impl-trait-return.rs

   1 fn foo() -> impl std::fmt::Display {
   2     if false {
   3         return 0i32;
   4     }
   5     1u32 //~ ERROR mismatched types
   6 }
   7
   8 fn bar() -> impl std::fmt::Display {
   9     if false {
  10         return 0i32;
  11     } else {
  12         return 1u32; //~ ERROR mismatched types
  13     }
  14 }
  15
  16 fn baz() -> impl std::fmt::Display {
  17     if false {
  18         return 0i32;
  19     } else {
  20         1u32 //~ ERROR mismatched types
  21     }
  22 }
  23
  24 fn qux() -> impl std::fmt::Display {
  25     if false {
  26         0i32
  27     } else {
  28         1u32 //~ ERROR `if` and `else` have incompatible types
  29     }
  30 }
  31
  32 fn bat() -> impl std::fmt::Display {
  33     match 13 {
  34         0 => return 0i32,
  35         _ => 1u32, //~ ERROR mismatched types
  36     }
  37 }
  38
  39 fn can() -> impl std::fmt::Display {
  40     match 13 { //~ ERROR mismatched types
  41         0 => return 0i32,
  42         1 => 1u32,
  43         _ => 2u32,
  44     }
  45 }
  46
  47 fn cat() -> impl std::fmt::Display {
  48     match 13 {
  49         0 => {
  50             return 0i32;
  51         }
  52         _ => {
  53             1u32 //~ ERROR mismatched types
  54         }
  55     }
  56 }
  57
  58 fn dog() -> impl std::fmt::Display {
  59     match 13 {
  60         0 => 0i32,
  61         1 => 1u32, //~ ERROR `match` arms have incompatible types
  62         _ => 2u32,
  63     }
  64 }
  65
  66 fn hat() -> dyn std::fmt::Display { //~ ERROR return type cannot have an unboxed trait object
  67     match 13 {
  68         0 => {
  69             return 0i32;
  70         }
  71         _ => {
  72             1u32
  73         }
  74     }
  75 }
  76
  77 fn pug() -> dyn std::fmt::Display { //~ ERROR return type cannot have an unboxed trait object
  78     match 13 {
  79         0 => 0i32,
  80         1 => 1u32, //~ ERROR `match` arms have incompatible types
  81         _ => 2u32,
  82     }
  83 }
  84
  85 fn man() -> dyn std::fmt::Display { //~ ERROR return type cannot have an unboxed trait object
  86     if false {
  87         0i32
  88     } else {
  89         1u32 //~ ERROR `if` and `else` have incompatible types
  90     }
  91 }
  92
  93 fn apt() -> impl std::fmt::Display {
  94     if let Some(42) = Some(42) {
  95         0i32
  96     } else {
  97         1u32 //~ ERROR `if` and `else` have incompatible types
  98     }
  99 }
 100
 101 fn main() {}