mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-22 20:53:21 +00:00
25 lines
751 B
Rust
25 lines
751 B
Rust
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#![feature(rustc_private)]
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#![warn(clippy::slow_symbol_comparisons)]
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extern crate rustc_span;
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use clippy_utils::sym;
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use rustc_span::Symbol;
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fn main() {
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let symbol = sym!(example);
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let other_symbol = sym!(other_example);
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// Should lint
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let slow_comparison = symbol.as_str() == "example";
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//~^ error: comparing `Symbol` via `Symbol::intern`
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let slow_comparison_macro = symbol.as_str() == "example";
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//~^ error: comparing `Symbol` via `Symbol::intern`
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let slow_comparison_backwards = symbol.as_str() == "example";
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//~^ error: comparing `Symbol` via `Symbol::intern`
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// Should not lint
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let faster_comparison = symbol.as_str() == "other_example";
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let preinterned_comparison = symbol == other_symbol;
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}
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