15 lines
214 B
Rust
15 lines
214 B
Rust
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pub trait FooMap {
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fn map<B, F: Fn() -> B>(&self, f: F) -> B;
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}
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impl FooMap for bool {
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fn map<B, F: Fn() -> B>(&self, f: F) -> B {
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f()
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}
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}
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fn main() {
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let a = true;
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a.map(|| false);
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}
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