mirror of https://github.com/rust-lang/rust
24 lines
514 B
Rust
24 lines
514 B
Rust
fn t7p<A, B, C>(f: impl Fn(B) -> C, g: impl Fn(A) -> B) -> impl Fn(A) -> C {
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move |a: A| -> C { f(g(a)) }
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}
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fn t8n<A, B, C>(f: impl Fn(A) -> B, g: impl Fn(A) -> C) -> impl Fn(A) -> (B, C)
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where
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A: Copy,
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{
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move |a: A| -> (B, C) {
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let b = a;
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let fa = f(a);
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let ga = g(b);
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(fa, ga)
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}
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}
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fn main() {
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let f = |(_, _)| {};
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let g = |(a, _)| a;
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let t7 = |env| |a| |b| t7p(f, g)(((env, a), b));
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//~^ ERROR mismatched types
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let t8 = t8n(t7, t7p(f, g));
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}
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