rust/tests/ui/single_char_pattern.rs

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// run-rustfix
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#![allow(unused_must_use)]
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use std::collections::HashSet;
fn main() {
let x = "foo";
x.split("x");
x.split("xx");
x.split('x');
let y = "x";
x.split(y);
// Not yet testing for multi-byte characters
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// Changing `r.len() == 1` to `r.chars().count() == 1` in `lint_clippy::single_char_pattern`
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// should have done this but produced an ICE
//
// We may not want to suggest changing these anyway
// See: https://github.com/rust-lang/rust-clippy/issues/650#issuecomment-184328984
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x.split("ß");
x.split("");
x.split("💣");
// Can't use this lint for unicode code points which don't fit in a char
x.split("❤️");
x.contains("x");
x.starts_with("x");
x.ends_with("x");
x.find("x");
x.rfind("x");
x.rsplit("x");
x.split_terminator("x");
x.rsplit_terminator("x");
x.splitn(0, "x");
x.rsplitn(0, "x");
x.matches("x");
x.rmatches("x");
x.match_indices("x");
x.rmatch_indices("x");
x.trim_start_matches("x");
x.trim_end_matches("x");
// Make sure we escape characters correctly.
x.split("\n");
x.split("'");
x.split("\'");
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let h = HashSet::<String>::new();
h.contains("X"); // should not warn
x.replace(";", ",").split(","); // issue #2978
x.starts_with("\x03"); // issue #2996
// Issue #3204
const S: &str = "#";
x.find(S);
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}