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Add lint for checking exceeding bitshifts #17713

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This commit is contained in:
Falco Hirschenberger 2014-11-01 09:10:02 +01:00
parent 51a25c7f96
commit e5058a8f0c
3 changed files with 113 additions and 3 deletions
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2
src/test/compile-fail/huge-array-simple.rs
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@ -11,5 +11,5 @@
// error-pattern: too big for the current
fn main() {
let fat : [u8, ..(1<<61)+(1<<31)] = [0, ..(1<<61)+(1<<31)];
let fat : [u8, ..(1<<61)+(1<<31)] = [0, ..(1u64<<61) as uint +(1u64<<31) as uint];
}

58
src/test/compile-fail/lint-exceeding-bitshifts.rs Normal file
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@ -0,0 +1,58 @@
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![deny(exceeding_bitshifts)]
#![allow(unused_variables)]
fn main() {
let n = 1u8 << 8;
let n = 1u8 << 9; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u16 << 16;
let n = 1u16 << 17; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u32 << 32;
let n = 1u32 << 33; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u64 << 64;
let n = 1u64 << 65; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i8 << 8;
let n = 1i8 << 9; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i16 << 16;
let n = 1i16 << 17; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i32 << 32;
let n = 1i32 << 33; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i64 << 64;
let n = 1i64 << 65; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u8 >> 8;
let n = 1u8 >> 9; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u16 >> 16;
let n = 1u16 >> 17; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u32 >> 32;
let n = 1u32 >> 33; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u64 >> 64;
let n = 1u64 >> 65; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i8 >> 8;
let n = 1i8 >> 9; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i16 >> 16;
let n = 1i16 >> 17; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i32 >> 32;
let n = 1i32 >> 33; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1i64 >> 64;
let n = 1i64 >> 65; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u8;
let n = n << 8;
let n = n << 9; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u8 << -9; //~ ERROR: bitshift exceeds the type's number of bits
let n = 1u8 << (4+4);
let n = 1u8 << (4+5); //~ ERROR: bitshift exceeds the type's number of bits
}