mirror of https://github.com/rust-lang/rust
30 lines
562 B
Rust
30 lines
562 B
Rust
use std::collections::HashSet;
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/// natural case from the issue
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struct Value(u32);
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fn main() {
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let hs = HashSet::<Value>::new();
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hs.insert(Value(0)); //~ ERROR
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}
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/// synthetic cases
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pub struct NoDerives;
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struct Object<T>(T);
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impl<T: Eq> Object<T> {
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fn use_eq(&self) {}
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}
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impl<T: Ord> Object<T> {
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fn use_ord(&self) {}
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}
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impl<T: Ord + PartialOrd> Object<T> {
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fn use_ord_and_partial_ord(&self) {}
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}
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fn function(foo: Object<NoDerives>) {
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foo.use_eq(); //~ ERROR
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foo.use_ord(); //~ ERROR
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foo.use_ord_and_partial_ord(); //~ ERROR
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}
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