47 lines
828 B
Rust
47 lines
828 B
Rust
//@ run-pass
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// Test using overloaded indexing when the "map" is stored in a
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// field. This caused problems at some point.
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use std::ops::Index;
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struct Foo {
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x: isize,
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y: isize,
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}
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struct Bar {
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foo: Foo
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}
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impl Index<isize> for Foo {
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type Output = isize;
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fn index(&self, z: isize) -> &isize {
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if z == 0 {
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&self.x
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} else {
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&self.y
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}
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}
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}
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trait Int {
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fn get(self) -> isize;
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fn get_from_ref(&self) -> isize; //~ WARN methods `get_from_ref` and `inc` are never used
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fn inc(&mut self);
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}
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impl Int for isize {
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fn get(self) -> isize { self }
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fn get_from_ref(&self) -> isize { *self }
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fn inc(&mut self) { *self += 1; }
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}
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fn main() {
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let f = Bar { foo: Foo {
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x: 1,
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y: 2,
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} };
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assert_eq!(f.foo[1].get(), 2);
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}
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