bevy_reflect_derive/impls/
common.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
use bevy_macro_utils::fq_std::{FQAny, FQBox, FQOption, FQResult};

use quote::quote;

use crate::{derive_data::ReflectMeta, where_clause_options::WhereClauseOptions};

pub fn impl_full_reflect(
    meta: &ReflectMeta,
    where_clause_options: &WhereClauseOptions,
) -> proc_macro2::TokenStream {
    let bevy_reflect_path = meta.bevy_reflect_path();
    let type_path = meta.type_path();

    let (impl_generics, ty_generics, where_clause) = type_path.generics().split_for_impl();
    let where_reflect_clause = where_clause_options.extend_where_clause(where_clause);

    let any_impls = if meta.is_remote_wrapper() {
        quote! {
            #[inline]
            fn into_any(self: #FQBox<Self>) -> #FQBox<dyn #FQAny> {
                #FQBox::new(self.0)
            }

            #[inline]
            fn as_any(&self) -> &dyn #FQAny {
                &self.0
            }

            #[inline]
            fn as_any_mut(&mut self) -> &mut dyn #FQAny {
                &mut self.0
            }
        }
    } else {
        quote! {
            #[inline]
            fn into_any(self: #FQBox<Self>) -> #FQBox<dyn #FQAny> {
                self
            }

            #[inline]
            fn as_any(&self) -> &dyn #FQAny {
                self
            }

            #[inline]
            fn as_any_mut(&mut self) -> &mut dyn #FQAny {
                self
            }
        }
    };

    quote! {
        impl #impl_generics #bevy_reflect_path::Reflect for #type_path #ty_generics #where_reflect_clause {
            #any_impls

            #[inline]
            fn into_reflect(self: #FQBox<Self>) -> #FQBox<dyn #bevy_reflect_path::Reflect> {
                self
            }

            #[inline]
            fn as_reflect(&self) -> &dyn #bevy_reflect_path::Reflect {
                self
            }

            #[inline]
            fn as_reflect_mut(&mut self) -> &mut dyn #bevy_reflect_path::Reflect {
                self
            }

            #[inline]
            fn set(
                &mut self,
                value: #FQBox<dyn #bevy_reflect_path::Reflect>
            ) -> #FQResult<(), #FQBox<dyn #bevy_reflect_path::Reflect>> {
                *self = <dyn #bevy_reflect_path::Reflect>::take(value)?;
                #FQResult::Ok(())
            }
        }
    }
}

pub fn common_partial_reflect_methods(
    meta: &ReflectMeta,
    default_partial_eq_delegate: impl FnOnce() -> Option<proc_macro2::TokenStream>,
    default_hash_delegate: impl FnOnce() -> Option<proc_macro2::TokenStream>,
) -> proc_macro2::TokenStream {
    let bevy_reflect_path = meta.bevy_reflect_path();

    let debug_fn = meta.attrs().get_debug_impl();
    let partial_eq_fn = meta
        .attrs()
        .get_partial_eq_impl(bevy_reflect_path)
        .or_else(move || {
            let default_delegate = default_partial_eq_delegate();
            default_delegate.map(|func| {
                quote! {
                    fn reflect_partial_eq(&self, value: &dyn #bevy_reflect_path::PartialReflect) -> #FQOption<bool> {
                        (#func)(self, value)
                    }
                }
            })
        });
    let hash_fn = meta
        .attrs()
        .get_hash_impl(bevy_reflect_path)
        .or_else(move || {
            let default_delegate = default_hash_delegate();
            default_delegate.map(|func| {
                quote! {
                    fn reflect_hash(&self) -> #FQOption<u64> {
                        (#func)(self)
                    }
                }
            })
        });

    quote! {
        #[inline]
        fn try_into_reflect(
            self: #FQBox<Self>
        ) -> #FQResult<#FQBox<dyn #bevy_reflect_path::Reflect>, #FQBox<dyn #bevy_reflect_path::PartialReflect>> {
            #FQResult::Ok(self)
        }

        #[inline]
        fn try_as_reflect(&self) -> #FQOption<&dyn #bevy_reflect_path::Reflect> {
            #FQOption::Some(self)
        }

        #[inline]
        fn try_as_reflect_mut(&mut self) -> #FQOption<&mut dyn #bevy_reflect_path::Reflect> {
            #FQOption::Some(self)
        }

        #[inline]
        fn into_partial_reflect(self: #FQBox<Self>) -> #FQBox<dyn #bevy_reflect_path::PartialReflect> {
            self
        }

        #[inline]
        fn as_partial_reflect(&self) -> &dyn #bevy_reflect_path::PartialReflect {
            self
        }

        #[inline]
        fn as_partial_reflect_mut(&mut self) -> &mut dyn #bevy_reflect_path::PartialReflect {
            self
        }

        #hash_fn

        #partial_eq_fn

        #debug_fn
    }
}