src/test/compile-fail/lint-exceeding-bitshifts.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 #![feature(negate_unsigned)]
  12 #![deny(exceeding_bitshifts)]
  13 #![allow(unused_variables)]
  14 #![allow(dead_code)]
  15 #![feature(num_bits_bytes, negate_unsigned)]
  16
  17 fn main() {
  18       let n = 1u8 << 7;
  19       let n = 1u8 << 8;   //~ ERROR: bitshift exceeds the type's number of bits
  20       let n = 1u16 << 15;
  21       let n = 1u16 << 16; //~ ERROR: bitshift exceeds the type's number of bits
  22       let n = 1u32 << 31;
  23       let n = 1u32 << 32; //~ ERROR: bitshift exceeds the type's number of bits
  24       let n = 1u64 << 63;
  25       let n = 1u64 << 64; //~ ERROR: bitshift exceeds the type's number of bits
  26       let n = 1i8 << 7;
  27       let n = 1i8 << 8;   //~ ERROR: bitshift exceeds the type's number of bits
  28       let n = 1i16 << 15;
  29       let n = 1i16 << 16; //~ ERROR: bitshift exceeds the type's number of bits
  30       let n = 1i32 << 31;
  31       let n = 1i32 << 32; //~ ERROR: bitshift exceeds the type's number of bits
  32       let n = 1i64 << 63;
  33       let n = 1i64 << 64; //~ ERROR: bitshift exceeds the type's number of bits
  34
  35       let n = 1u8 >> 7;
  36       let n = 1u8 >> 8;   //~ ERROR: bitshift exceeds the type's number of bits
  37       let n = 1u16 >> 15;
  38       let n = 1u16 >> 16; //~ ERROR: bitshift exceeds the type's number of bits
  39       let n = 1u32 >> 31;
  40       let n = 1u32 >> 32; //~ ERROR: bitshift exceeds the type's number of bits
  41       let n = 1u64 >> 63;
  42       let n = 1u64 >> 64; //~ ERROR: bitshift exceeds the type's number of bits
  43       let n = 1i8 >> 7;
  44       let n = 1i8 >> 8;   //~ ERROR: bitshift exceeds the type's number of bits
  45       let n = 1i16 >> 15;
  46       let n = 1i16 >> 16; //~ ERROR: bitshift exceeds the type's number of bits
  47       let n = 1i32 >> 31;
  48       let n = 1i32 >> 32; //~ ERROR: bitshift exceeds the type's number of bits
  49       let n = 1i64 >> 63;
  50       let n = 1i64 >> 64; //~ ERROR: bitshift exceeds the type's number of bits
  51
  52       let n = 1u8;
  53       let n = n << 7;
  54       let n = n << 8; //~ ERROR: bitshift exceeds the type's number of bits
  55
  56       let n = 1u8 << -8; //~ ERROR: bitshift exceeds the type's number of bits
  57
  58       let n = 1u8 << (4+3);
  59       let n = 1u8 << (4+4); //~ ERROR: bitshift exceeds the type's number of bits
  60
  61       let n = 1_isize << std::isize::BITS; //~ ERROR: bitshift exceeds the type's number of bits
  62       let n = 1_usize << std::usize::BITS; //~ ERROR: bitshift exceeds the type's number of bits
  63 }