rust-analyzer - Unnamed repository; edit this file 'description' to name the repository.


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

//! Things related to opaques in the next-trait-solver.

use intern::{Interned, InternedRef, impl_internable};
use macros::GenericTypeVisitable;
use rustc_ast_ir::try_visit;
use rustc_type_ir::inherent::SliceLike;

use crate::next_solver::{impl_foldable_for_interned_slice, interned_slice};

use super::{DbInterner, SolverDefId, Ty};

pub type OpaqueTypeKey<'db> = rustc_type_ir::OpaqueTypeKey<DbInterner<'db>>;

type PredefinedOpaque<'db> = (OpaqueTypeKey<'db>, Ty<'db>);
interned_slice!(
    PredefinedOpaquesStorage,
    PredefinedOpaques,
    StoredPredefinedOpaques,
    predefined_opaques,
    PredefinedOpaque<'db>,
    PredefinedOpaque<'static>,
);
impl_foldable_for_interned_slice!(PredefinedOpaques);

pub type ExternalConstraintsData<'db> =
    rustc_type_ir::solve::ExternalConstraintsData<DbInterner<'db>>;

interned_slice!(
    SolverDefIdsStorage,
    SolverDefIds,
    StoredSolverDefIds,
    def_ids,
    SolverDefId,
    SolverDefId,
);
impl_foldable_for_interned_slice!(SolverDefIds);

#[derive(Clone, Copy, PartialEq, Eq, Hash)]
pub struct ExternalConstraints<'db> {
    interned: InternedRef<'db, ExternalConstraintsInterned>,
}

#[derive(PartialEq, Eq, Hash, GenericTypeVisitable)]
pub(super) struct ExternalConstraintsInterned(ExternalConstraintsData<'static>);

impl_internable!(gc; ExternalConstraintsInterned);

const _: () = {
    const fn is_copy<T: Copy>() {}
    is_copy::<ExternalConstraints<'static>>();
};

impl<'db> ExternalConstraints<'db> {
    #[inline]
    pub fn new(_interner: DbInterner<'db>, data: ExternalConstraintsData<'db>) -> Self {
        let data = unsafe {
            std::mem::transmute::<ExternalConstraintsData<'db>, ExternalConstraintsData<'static>>(
                data,
            )
        };
        Self { interned: Interned::new_gc(ExternalConstraintsInterned(data)) }
    }

    #[inline]
    pub fn inner(&self) -> &ExternalConstraintsData<'db> {
        let inner = &self.interned.0;
        unsafe {
            std::mem::transmute::<&ExternalConstraintsData<'static>, &ExternalConstraintsData<'db>>(
                inner,
            )
        }
    }
}

impl<'db> std::ops::Deref for ExternalConstraints<'db> {
    type Target = ExternalConstraintsData<'db>;

    fn deref(&self) -> &Self::Target {
        self.inner()
    }
}

impl std::fmt::Debug for ExternalConstraints<'_> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.inner().fmt(f)
    }
}

impl<'db> rustc_type_ir::TypeVisitable<DbInterner<'db>> for ExternalConstraints<'db> {
    fn visit_with<V: rustc_type_ir::TypeVisitor<DbInterner<'db>>>(
        &self,
        visitor: &mut V,
    ) -> V::Result {
        try_visit!(self.region_constraints.visit_with(visitor));
        try_visit!(self.opaque_types.visit_with(visitor));
        self.normalization_nested_goals.visit_with(visitor)
    }
}

impl<'db> rustc_type_ir::TypeFoldable<DbInterner<'db>> for ExternalConstraints<'db> {
    fn try_fold_with<F: rustc_type_ir::FallibleTypeFolder<DbInterner<'db>>>(
        self,
        folder: &mut F,
    ) -> Result<Self, F::Error> {
        Ok(ExternalConstraints::new(
            folder.cx(),
            ExternalConstraintsData {
                region_constraints: self.region_constraints.clone().try_fold_with(folder)?,
                opaque_types: self
                    .opaque_types
                    .iter()
                    .cloned()
                    .map(|opaque| opaque.try_fold_with(folder))
                    .collect::<Result<_, F::Error>>()?,
                normalization_nested_goals: self
                    .normalization_nested_goals
                    .clone()
                    .try_fold_with(folder)?,
            },
        ))
    }
    fn fold_with<F: rustc_type_ir::TypeFolder<DbInterner<'db>>>(self, folder: &mut F) -> Self {
        ExternalConstraints::new(
            folder.cx(),
            ExternalConstraintsData {
                region_constraints: self.region_constraints.clone().fold_with(folder),
                opaque_types: self
                    .opaque_types
                    .iter()
                    .cloned()
                    .map(|opaque| opaque.fold_with(folder))
                    .collect(),
                normalization_nested_goals: self
                    .normalization_nested_goals
                    .clone()
                    .fold_with(folder),
            },
        )
    }
}