44 lines
721 B
Rust
44 lines
721 B
Rust
#![feature(specialization)]
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// Common code used for tests that model the Fn/FnMut/FnOnce hierarchy.
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pub trait Go {
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fn go(&self, arg: isize);
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}
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pub fn go<G:Go>(this: &G, arg: isize) {
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this.go(arg)
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}
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pub trait GoMut {
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fn go_mut(&mut self, arg: isize);
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}
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pub fn go_mut<G:GoMut>(this: &mut G, arg: isize) {
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this.go_mut(arg)
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}
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pub trait GoOnce {
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fn go_once(self, arg: isize);
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}
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pub fn go_once<G:GoOnce>(this: G, arg: isize) {
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this.go_once(arg)
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}
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impl<G> GoMut for G
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where G : Go
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{
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default fn go_mut(&mut self, arg: isize) {
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go(&*self, arg)
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}
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}
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impl<G> GoOnce for G
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where G : GoMut
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{
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default fn go_once(mut self, arg: isize) {
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go_mut(&mut self, arg)
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}
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}
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