downgrade to pedantic
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@ -1145,8 +1145,10 @@ declare_clippy_lint! {
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/// `str` as an argument, e.g., `_.split("x")`.
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///
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/// ### Why is this bad?
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/// Performing these methods using a `char` can be faster than
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/// using a `str` because it needs one less indirection.
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/// While this can make a perf difference on some systems,
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/// benchmarks have proven inconclusive. But at least using a
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/// char literal makes it clear that we are looking at a single
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/// character.
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///
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/// ### Known problems
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/// Does not catch multi-byte unicode characters. This is by
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@ -1165,7 +1167,7 @@ declare_clippy_lint! {
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/// ```
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#[clippy::version = "pre 1.29.0"]
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pub SINGLE_CHAR_PATTERN,
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perf,
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pedantic,
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"using a single-character str where a char could be used, e.g., `_.split(\"x\")`"
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}
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@ -1,5 +1,5 @@
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#![allow(clippy::needless_raw_strings, clippy::needless_raw_string_hashes, unused_must_use)]
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#![warn(clippy::single_char_pattern)]
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use std::collections::HashSet;
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fn main() {
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@ -1,5 +1,5 @@
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#![allow(clippy::needless_raw_strings, clippy::needless_raw_string_hashes, unused_must_use)]
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#![warn(clippy::single_char_pattern)]
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use std::collections::HashSet;
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fn main() {
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@ -7,24 +7,6 @@ LL | x.split("x");
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= note: `-D clippy::single-char-pattern` implied by `-D warnings`
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= help: to override `-D warnings` add `#[allow(clippy::single_char_pattern)]`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:13:13
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LL | x.split("ß");
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| ^^^ help: consider using a `char`: `'ß'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:14:13
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LL | x.split("ℝ");
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| ^^^ help: consider using a `char`: `'ℝ'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:15:13
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LL | x.split("💣");
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| ^^^^ help: consider using a `char`: `'💣'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:18:23
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@ -140,106 +122,94 @@ LL | x.trim_end_matches("x");
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| ^^^ help: consider using a `char`: `'x'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:37:20
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LL | x.strip_prefix("x");
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| ^^^ help: consider using a `char`: `'x'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:38:20
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LL | x.strip_suffix("x");
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| ^^^ help: consider using a `char`: `'x'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:39:15
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--> tests/ui/single_char_pattern.rs:37:15
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LL | x.replace("x", "y");
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| ^^^ help: consider using a `char`: `'x'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:40:16
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--> tests/ui/single_char_pattern.rs:38:16
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LL | x.replacen("x", "y", 3);
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| ^^^ help: consider using a `char`: `'x'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:42:13
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--> tests/ui/single_char_pattern.rs:40:13
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LL | x.split("\n");
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| ^^^^ help: consider using a `char`: `'\n'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:43:13
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--> tests/ui/single_char_pattern.rs:41:13
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LL | x.split("'");
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| ^^^ help: consider using a `char`: `'\''`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:44:13
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--> tests/ui/single_char_pattern.rs:42:13
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LL | x.split("\'");
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| ^^^^ help: consider using a `char`: `'\''`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:46:13
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--> tests/ui/single_char_pattern.rs:44:13
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LL | x.split("\"");
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| ^^^^ help: consider using a `char`: `'"'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:51:31
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--> tests/ui/single_char_pattern.rs:49:31
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LL | x.replace(';', ",").split(","); // issue #2978
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| ^^^ help: consider using a `char`: `','`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:52:19
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--> tests/ui/single_char_pattern.rs:50:19
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LL | x.starts_with("\x03"); // issue #2996
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| ^^^^^^ help: consider using a `char`: `'\x03'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:59:13
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--> tests/ui/single_char_pattern.rs:57:13
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LL | x.split(r"a");
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| ^^^^ help: consider using a `char`: `'a'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:60:13
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--> tests/ui/single_char_pattern.rs:58:13
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LL | x.split(r#"a"#);
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| ^^^^^^ help: consider using a `char`: `'a'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:61:13
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--> tests/ui/single_char_pattern.rs:59:13
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LL | x.split(r###"a"###);
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| ^^^^^^^^^^ help: consider using a `char`: `'a'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:62:13
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--> tests/ui/single_char_pattern.rs:60:13
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LL | x.split(r###"'"###);
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| ^^^^^^^^^^ help: consider using a `char`: `'\''`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:63:13
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--> tests/ui/single_char_pattern.rs:61:13
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LL | x.split(r###"#"###);
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| ^^^^^^^^^^ help: consider using a `char`: `'#'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:65:13
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--> tests/ui/single_char_pattern.rs:63:13
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LL | x.split(r#"\"#);
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| ^^^^^^ help: consider using a `char`: `'\\'`
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error: single-character string constant used as pattern
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--> tests/ui/single_char_pattern.rs:66:13
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--> tests/ui/single_char_pattern.rs:64:13
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LL | x.split(r"\");
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| ^^^^ help: consider using a `char`: `'\\'`
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error: aborting due to 40 previous errors
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error: aborting due to 35 previous errors
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