src/test/compile-fail/issue-41255.rs

   1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Matching against float literals should result in a linter error
  12
  13 #![feature(slice_patterns)]
  14 #![feature(exclusive_range_pattern)]
  15 #![allow(unused)]
  16 #![forbid(illegal_floating_point_literal_pattern)]
  17
  18 fn main() {
  19     let x = 42.0;
  20     match x {
  21         5.0 => {}, //~ ERROR floating-point literals cannot be used
  22                    //~| WARNING hard error
  23         5.0f32 => {}, //~ ERROR floating-point literals cannot be used
  24                       //~| WARNING hard error
  25         -5.0 => {}, //~ ERROR floating-point literals cannot be used
  26                     //~| WARNING hard error
  27         1.0 .. 33.0 => {}, //~ ERROR floating-point literals cannot be used
  28                            //~| WARNING hard error
  29                            //~| ERROR floating-point literals cannot be used
  30                            //~| WARNING hard error
  31         39.0 ... 70.0 => {}, //~ ERROR floating-point literals cannot be used
  32                              //~| WARNING hard error
  33                              //~| ERROR floating-point literals cannot be used
  34                              //~| WARNING hard error
  35         _ => {},
  36     };
  37     let y = 5.0;
  38     // Same for tuples
  39     match (x, 5) {
  40         (3.14, 1) => {}, //~ ERROR floating-point literals cannot be used
  41                          //~| WARNING hard error
  42                          //~| ERROR floating-point literals cannot be used
  43                          //~| WARNING hard error
  44         _ => {},
  45     }
  46     // Or structs
  47     struct Foo { x: f32 };
  48     match (Foo { x }) {
  49         Foo { x: 2.0 } => {}, //~ ERROR floating-point literals cannot be used
  50                               //~| WARNING hard error
  51                               //~| ERROR floating-point literals cannot be used
  52                               //~| WARNING hard error
  53         _ => {},
  54     }
  55 }