mirror of https://github.com/rust-lang/rust
38 lines
952 B
Rust
38 lines
952 B
Rust
//@ run-pass
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// (Closes #7911) Test that we can use the same self expression
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// with different mutability in macro in two methods
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#![allow(unused_variables)] // unused foobar_immut + foobar_mut
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trait FooBar {
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fn dummy(&self) { } //~ WARN method `dummy` is never used
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}
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struct Bar(#[allow(dead_code)] i32);
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struct Foo { bar: Bar }
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impl FooBar for Bar {}
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trait Test {
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fn get_immut(&self) -> &dyn FooBar;
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fn get_mut(&mut self) -> &mut dyn FooBar;
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}
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macro_rules! generate_test { ($type_:path, $slf:ident, $field:expr) => (
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impl Test for $type_ {
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fn get_immut(&$slf) -> &dyn FooBar {
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&$field as &dyn FooBar
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}
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fn get_mut(&mut $slf) -> &mut dyn FooBar {
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&mut $field as &mut dyn FooBar
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}
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}
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)}
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generate_test!(Foo, self, self.bar);
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pub fn main() {
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let mut foo: Foo = Foo { bar: Bar(42) };
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{ let foobar_immut = foo.get_immut(); }
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{ let foobar_mut = foo.get_mut(); }
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}
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