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rustc_arena: macros 2.0

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This commit is contained in:
bstrie 2021-05-25 13:57:02 -04:00
parent bf24e6ba00
commit 71db7cc0b4
1 changed files with 79 additions and 81 deletions
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26
compiler/rustc_arena/src/lib.rs
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@ -15,6 +15,8 @@
#![feature(new_uninit)]
#![feature(maybe_uninit_slice)]
#![feature(min_specialization)]
#![feature(decl_macro)]
#![feature(rustc_attrs)]
#![cfg_attr(test, feature(test))]
use rustc_data_structures::sync;
@ -608,35 +610,32 @@ impl DropArena {
}
}
#[macro_export]
macro_rules! arena_for_type {
pub macro arena_for_type {
([][$ty:ty]) => {
$crate::TypedArena<$ty>
};
},
([few $(, $attrs:ident)*][$ty:ty]) => {
::std::marker::PhantomData<$ty>
};
},
([$ignore:ident $(, $attrs:ident)*]$args:tt) => {
$crate::arena_for_type!([$($attrs),*]$args)
};
},
}
#[macro_export]
macro_rules! which_arena_for_type {
pub macro which_arena_for_type {
([][$arena:expr]) => {
::std::option::Option::Some($arena)
};
},
([few$(, $attrs:ident)*][$arena:expr]) => {
::std::option::Option::None
};
},
([$ignore:ident$(, $attrs:ident)*]$args:tt) => {
$crate::which_arena_for_type!([$($attrs),*]$args)
};
},
}
#[macro_export]
macro_rules! declare_arena {
([], [$($a:tt $name:ident: $ty:ty,)*], $tcx:lifetime) => {
#[rustc_macro_transparency = "semitransparent"]
pub macro declare_arena([], [$($a:tt $name:ident: $ty:ty,)*], $tcx:lifetime) {
#[derive(Default)]
pub struct Arena<$tcx> {
pub dropless: $crate::DroplessArena,
@ -721,7 +720,6 @@ macro_rules! declare_arena {
}
}
}
}
#[cfg(test)]
mod tests;