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
159
160
161
162
163
164
165
166
167
168

//! This module contains the implementations of the `ToChalk` trait, which
//! handles conversion between our data types and their corresponding types in
//! Chalk (in both directions); plus some helper functions for more specialized
//! conversions.

use chalk_solve::rust_ir;

use base_db::salsa::{self, InternKey};
use hir_def::{LifetimeParamId, TraitId, TypeAliasId, TypeOrConstParamId};

use crate::{
    chalk_db, db::HirDatabase, AssocTypeId, CallableDefId, ChalkTraitId, FnDefId, ForeignDefId,
    Interner, OpaqueTyId, PlaceholderIndex,
};

pub(crate) trait ToChalk {
    type Chalk;
    fn to_chalk(self, db: &dyn HirDatabase) -> Self::Chalk;
    fn from_chalk(db: &dyn HirDatabase, chalk: Self::Chalk) -> Self;
}

pub(crate) fn from_chalk<T, ChalkT>(db: &dyn HirDatabase, chalk: ChalkT) -> T
where
    T: ToChalk<Chalk = ChalkT>,
{
    T::from_chalk(db, chalk)
}

impl ToChalk for hir_def::ImplId {
    type Chalk = chalk_db::ImplId;

    fn to_chalk(self, _db: &dyn HirDatabase) -> chalk_db::ImplId {
        chalk_ir::ImplId(self.as_intern_id())
    }

    fn from_chalk(_db: &dyn HirDatabase, impl_id: chalk_db::ImplId) -> hir_def::ImplId {
        InternKey::from_intern_id(impl_id.0)
    }
}

impl ToChalk for CallableDefId {
    type Chalk = FnDefId;

    fn to_chalk(self, db: &dyn HirDatabase) -> FnDefId {
        db.intern_callable_def(self).into()
    }

    fn from_chalk(db: &dyn HirDatabase, fn_def_id: FnDefId) -> CallableDefId {
        db.lookup_intern_callable_def(fn_def_id.into())
    }
}

pub(crate) struct TypeAliasAsValue(pub(crate) TypeAliasId);

impl ToChalk for TypeAliasAsValue {
    type Chalk = chalk_db::AssociatedTyValueId;

    fn to_chalk(self, _db: &dyn HirDatabase) -> chalk_db::AssociatedTyValueId {
        rust_ir::AssociatedTyValueId(self.0.as_intern_id())
    }

    fn from_chalk(
        _db: &dyn HirDatabase,
        assoc_ty_value_id: chalk_db::AssociatedTyValueId,
    ) -> TypeAliasAsValue {
        TypeAliasAsValue(TypeAliasId::from_intern_id(assoc_ty_value_id.0))
    }
}

impl From<FnDefId> for crate::db::InternedCallableDefId {
    fn from(fn_def_id: FnDefId) -> Self {
        InternKey::from_intern_id(fn_def_id.0)
    }
}

impl From<crate::db::InternedCallableDefId> for FnDefId {
    fn from(callable_def_id: crate::db::InternedCallableDefId) -> Self {
        chalk_ir::FnDefId(callable_def_id.as_intern_id())
    }
}

impl From<OpaqueTyId> for crate::db::InternedOpaqueTyId {
    fn from(id: OpaqueTyId) -> Self {
        InternKey::from_intern_id(id.0)
    }
}

impl From<crate::db::InternedOpaqueTyId> for OpaqueTyId {
    fn from(id: crate::db::InternedOpaqueTyId) -> Self {
        chalk_ir::OpaqueTyId(id.as_intern_id())
    }
}

impl From<chalk_ir::ClosureId<Interner>> for crate::db::InternedClosureId {
    fn from(id: chalk_ir::ClosureId<Interner>) -> Self {
        Self::from_intern_id(id.0)
    }
}

impl From<crate::db::InternedClosureId> for chalk_ir::ClosureId<Interner> {
    fn from(id: crate::db::InternedClosureId) -> Self {
        chalk_ir::ClosureId(id.as_intern_id())
    }
}

impl From<chalk_ir::CoroutineId<Interner>> for crate::db::InternedCoroutineId {
    fn from(id: chalk_ir::CoroutineId<Interner>) -> Self {
        Self::from_intern_id(id.0)
    }
}

impl From<crate::db::InternedCoroutineId> for chalk_ir::CoroutineId<Interner> {
    fn from(id: crate::db::InternedCoroutineId) -> Self {
        chalk_ir::CoroutineId(id.as_intern_id())
    }
}

pub fn to_foreign_def_id(id: TypeAliasId) -> ForeignDefId {
    chalk_ir::ForeignDefId(salsa::InternKey::as_intern_id(&id))
}

pub fn from_foreign_def_id(id: ForeignDefId) -> TypeAliasId {
    salsa::InternKey::from_intern_id(id.0)
}

pub fn to_assoc_type_id(id: TypeAliasId) -> AssocTypeId {
    chalk_ir::AssocTypeId(salsa::InternKey::as_intern_id(&id))
}

pub fn from_assoc_type_id(id: AssocTypeId) -> TypeAliasId {
    salsa::InternKey::from_intern_id(id.0)
}

pub fn from_placeholder_idx(db: &dyn HirDatabase, idx: PlaceholderIndex) -> TypeOrConstParamId {
    assert_eq!(idx.ui, chalk_ir::UniverseIndex::ROOT);
    let interned_id = salsa::InternKey::from_intern_id(salsa::InternId::from(idx.idx));
    db.lookup_intern_type_or_const_param_id(interned_id)
}

pub fn to_placeholder_idx(db: &dyn HirDatabase, id: TypeOrConstParamId) -> PlaceholderIndex {
    let interned_id = db.intern_type_or_const_param_id(id);
    PlaceholderIndex {
        ui: chalk_ir::UniverseIndex::ROOT,
        idx: salsa::InternKey::as_intern_id(&interned_id).as_usize(),
    }
}

pub fn lt_from_placeholder_idx(db: &dyn HirDatabase, idx: PlaceholderIndex) -> LifetimeParamId {
    assert_eq!(idx.ui, chalk_ir::UniverseIndex::ROOT);
    let interned_id = salsa::InternKey::from_intern_id(salsa::InternId::from(idx.idx));
    db.lookup_intern_lifetime_param_id(interned_id)
}

pub fn lt_to_placeholder_idx(db: &dyn HirDatabase, id: LifetimeParamId) -> PlaceholderIndex {
    let interned_id = db.intern_lifetime_param_id(id);
    PlaceholderIndex {
        ui: chalk_ir::UniverseIndex::ROOT,
        idx: salsa::InternKey::as_intern_id(&interned_id).as_usize(),
    }
}

pub fn to_chalk_trait_id(id: TraitId) -> ChalkTraitId {
    chalk_ir::TraitId(salsa::InternKey::as_intern_id(&id))
}

pub fn from_chalk_trait_id(id: ChalkTraitId) -> TraitId {
    salsa::InternKey::from_intern_id(id.0)
}