abi_stable_derive/
arenas.rs

1#![allow(clippy::mut_from_ref)]
2
3use std::fmt;
4
5use typed_arena::Arena;
6
7macro_rules! declare_arenas {
8    (
9        $( $field_name:ident : $arena_type:ty , )*
10    ) => {
11        pub(crate) struct Arenas {
12            $(pub(crate) $field_name : Arena<$arena_type>, )*
13        }
14
15        impl Default for Arenas{
16            fn default()->Self{
17                Arenas{
18                    $( $field_name:Arena::new(), )*
19                }
20            }
21        }
22
23        impl fmt::Debug for Arenas{
24            fn fmt(&self,f:&mut fmt::Formatter<'_>)->fmt::Result{
25                fmt::Debug::fmt("Arenas{..}",f)
26            }
27        }
28
29        pub trait AllocMethods<T>{
30            fn alloc(&self, value: T) -> &T {
31                self.alloc_mut(value)
32            }
33
34            fn alloc_mut(&self, value: T) -> &mut T ;
35
36            fn alloc_extend<I>(&self, iterable: I) -> &[T]
37            where
38                I: IntoIterator<Item = T>
39            {
40                self.alloc_extend_mut(iterable)
41            }
42
43            fn alloc_extend_mut<I>(&self, iterable: I) -> &mut [T]
44            where
45                I: IntoIterator<Item = T>;
46        }
47
48
49        $(
50            impl AllocMethods<$arena_type> for Arenas{
51                fn alloc_mut(&self, value: $arena_type) -> &mut $arena_type {
52                    self.$field_name.alloc(value)
53                }
54
55                fn alloc_extend_mut<I>(&self, iterable: I) -> &mut [$arena_type]
56                where
57                    I: IntoIterator<Item = $arena_type>
58                {
59                    self.$field_name.alloc_extend(iterable)
60                }
61            }
62
63        )*
64
65    }
66}
67
68declare_arenas! {
69    vec_meta: Vec<syn::Attribute>,
70    vec_expr: Vec<syn::Expr>,
71    ident: syn::Ident,
72    ident_vec: Vec<syn::Ident>,
73    trait_bound: syn::TraitBound,
74    lifetimes:syn::Lifetime,
75    fields_named: syn::FieldsNamed,
76    types: syn::Type,
77    // metalists: syn::MetaList,
78    lifetime_defs: syn::LifetimeDef,
79    tokenstream: proc_macro2::TokenStream,
80    expr: syn::Expr,
81    strings: String,
82    paths: syn::Path,
83}
abi_stable_derive/arenas.rs

abi_stable_derive/
arenas.rs
