src/test/compile-fail/const-block-non-item-statement.rs

   1 // Copyright 2014 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 const A: usize = { 1; 2 };
  12 //~^ ERROR: blocks in constants are limited to items and tail expressions
  13
  14 const B: usize = { { } 2 };
  15 //~^ ERROR: blocks in constants are limited to items and tail expressions
  16
  17 macro_rules! foo {
  18     () => (()) //~ ERROR: blocks in constants are limited to items and tail expressions
  19 }
  20 const C: usize = { foo!(); 2 };
  21
  22 const D: usize = { let x = 4; 2 };
  23 //~^ ERROR: blocks in constants are limited to items and tail expressions
  24 //~^^ ERROR: blocks in constants are limited to items and tail expressions
  25
  26 enum Foo {
  27     Bar = { let x = 1; 3 }
  28     //~^ ERROR: blocks in constants are limited to items and tail expressions
  29     //~^^ ERROR: blocks in constants are limited to items and tail expressions
  30 }
  31
  32 type Array = [u32; {  let x = 2; 5 }];
  33 //~^ ERROR: blocks in constants are limited to items and tail expressions
  34 //~^^ ERROR: blocks in constants are limited to items and tail expressions
  35
  36 pub fn main() {
  37     let _: Array = [0; { let x = 3; 5 }];
  38     //~^ ERROR: blocks in constants are limited to items and tail expressions
  39     //~^^ ERROR: blocks in constants are limited to items and tail expressions
  40 }