mirror of
https://github.com/rust-lang/rust-clippy
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c209fc9349
Prior to this change, string_lit_as_bytes would trigger for constructs
like `include_str!("filename").as_bytes()` and would recommend fixing it
by rewriting as `binclude_str!("filename")`.
This change updates the lint to act as an EarlyLintPass lint. It then
differentiates between string literals and macros that have bytes
yielding alternatives.
Closes #3205
79 lines
1.6 KiB
Rust
79 lines
1.6 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[warn(clippy::string_add)]
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#[allow(clippy::string_add_assign)]
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fn add_only() {
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// ignores assignment distinction
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let mut x = "".to_owned();
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for _ in 1..3 {
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x = x + ".";
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}
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let y = "".to_owned();
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let z = y + "...";
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assert_eq!(&x, &z);
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}
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#[warn(clippy::string_add_assign)]
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fn add_assign_only() {
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let mut x = "".to_owned();
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for _ in 1..3 {
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x = x + ".";
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}
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let y = "".to_owned();
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let z = y + "...";
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assert_eq!(&x, &z);
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}
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#[warn(clippy::string_add, clippy::string_add_assign)]
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fn both() {
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let mut x = "".to_owned();
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for _ in 1..3 {
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x = x + ".";
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}
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let y = "".to_owned();
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let z = y + "...";
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assert_eq!(&x, &z);
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}
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#[allow(dead_code, unused_variables)]
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#[warn(clippy::string_lit_as_bytes)]
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fn str_lit_as_bytes() {
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let bs = "hello there".as_bytes();
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// no warning, because this cannot be written as a byte string literal:
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let ubs = "☃".as_bytes();
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let strify = stringify!(foobar).as_bytes();
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let includestr = include_str!("entry.rs").as_bytes();
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}
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fn main() {
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add_only();
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add_assign_only();
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both();
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// the add is only caught for `String`
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let mut x = 1;
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; x = x + 1;
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assert_eq!(2, x);
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}
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