src/test/ui/argument-suggestions/missing_arguments.rs

   1 fn one_arg(_a: i32) {}
   2 fn two_same(_a: i32, _b: i32) {}
   3 fn two_diff(_a: i32, _b: f32) {}
   4 fn three_same(_a: i32, _b: i32, _c: i32) {}
   5 fn three_diff(_a: i32, _b: f32, _c: &str) {}
   6 fn four_repeated(_a: i32, _b: f32, _c: f32, _d: &str) {}
   7 fn complex(_a: i32, _b: f32, _c: i32, _d: f32, _e: &str) {}
   8
   9 fn main() {
  10   one_arg(); //~ ERROR this function takes
  11   // The headers here show the types expected,
  12   // with formatting to emphasize which arguments are missing
  13   /*         i32     f32    */
  14   two_same(               ); //~ ERROR this function takes
  15   two_same(   1           ); //~ ERROR this function takes
  16   two_diff(               ); //~ ERROR this function takes
  17   two_diff(   1           ); //~ ERROR this function takes
  18   two_diff(          1.0  ); //~ ERROR this function takes
  19
  20   /*           i32     i32     i32    */
  21   three_same(                       ); //~ ERROR this function takes
  22   three_same(   1                   ); //~ ERROR this function takes
  23   three_same(   1,      1           ); //~ ERROR this function takes
  24
  25   /*           i32     f32     &str   */
  26   three_diff(          1.0,     ""  ); //~ ERROR this function takes
  27   three_diff(   1,              ""  ); //~ ERROR this function takes
  28   three_diff(   1,     1.0          ); //~ ERROR this function takes
  29   three_diff(                   ""  ); //~ ERROR this function takes
  30   three_diff(          1.0          ); //~ ERROR this function takes
  31   three_diff(   1                   ); //~ ERROR this function takes
  32
  33   /*              i32     f32     f32     &str   */
  34   four_repeated(                               ); //~ ERROR this function takes
  35   four_repeated(   1,                     ""   ); //~ ERROR this function takes
  36
  37   /*        i32   f32   i32   f32   &str   */
  38   complex(                               ); //~ ERROR this function takes
  39   complex(   1,                     ""   ); //~ ERROR this function takes
  40 }