rust/tests/run-pass/used_underscore_binding_macro.rs

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#[macro_use]
extern crate serde_derive;
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/// Test that we do not lint for unused underscores in a `MacroAttribute`
/// expansion
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#[deny(used_underscore_binding)]
#[derive(Deserialize)]
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struct MacroAttributesTest {
_foo: u32,
}
#[test]
fn macro_attributes_test() {
let _ = MacroAttributesTest { _foo: 0 };
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}
fn main() {}