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15 lines
217 B
Rust
15 lines
217 B
Rust
fn assert_all<F, T>(_f: F)
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where
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F: FnMut(&String) -> T,
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{
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}
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fn id(x: &String) -> &String {
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x
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}
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fn main() {
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assert_all::<_, &String>(id);
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//~^ ERROR implementation of `FnMut` is not general enough
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}
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