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use macro to shadow

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This commit is contained in:
mejrs 2021-08-17 15:16:03 +02:00
parent 370968b595
commit bce5100dc3
1 changed files with 19 additions and 15 deletions
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34
tests/test_proc_macro_hygiene.rs
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@ -1,22 +1,26 @@
#![no_implicit_prelude]
#![allow(non_camel_case_types)]
#![allow(dead_code)]
trait Use_unambiguous_imports<T> {
type Error;
macro_rules! shadow {
($name: ident) => {
::paste::item! {
#[allow(non_camel_case_types, dead_code)]
unsafe trait [<NobodyImplsThis_ $name>] {}
#[allow(non_camel_case_types, dead_code)]
struct [<Shadows_ $name>]<T: [<NobodyImplsThis_ $name>]> {
_ty: ::core::marker::PhantomData<T>,
}
#[allow(non_camel_case_types, dead_code)]
type $name = [<Shadows_ $name>]<()>;
}
};
}
struct Pyo3Shadowed;
type pyo3 = <Pyo3Shadowed as Use_unambiguous_imports<Pyo3Shadowed>>::Error;
struct CoreShadowed;
type core = <CoreShadowed as Use_unambiguous_imports<CoreShadowed>>::Error;
struct StdShadowed;
type std = <StdShadowed as Use_unambiguous_imports<StdShadowed>>::Error;
struct AllocShadowed;
type alloc = <AllocShadowed as Use_unambiguous_imports<AllocShadowed>>::Error;
shadow!(std);
shadow!(alloc);
shadow!(core);
shadow!(pyo3);
#[::pyo3::proc_macro::pyclass]
#[derive(::std::clone::Clone)]