rust/tests/ui/single_char_pattern.rs
Bruce Mitchener 769a1d9b6c Fix single_char_pattern for \n, \t, etc.
Single characters that are escaped weren't being searched / replaced
correctly in the hint string, so it was saying to replace, say,
`"\n"` with `"\n"` rather than `'\n'`.
2018-03-02 22:00:01 +07:00

43 lines
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Rust
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This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

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
// Changing `r.len() == 1` to `r.chars().count() == 1` in `lint_single_char_pattern`
// should have done this but produced an ICE
//
// We may not want to suggest changing these anyway
// See: https://github.com/rust-lang-nursery/rust-clippy/issues/650#issuecomment-184328984
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_left_matches("x");
x.trim_right_matches("x");
// Make sure we escape characters correctly.
x.split("\n");
let h = HashSet::<String>::new();
h.contains("X"); // should not warn
}