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

use rustc_data_structures::fx::FxHashMap;
use rustc_hir::def_id::DefIndex;
use rustc_index::{Idx, IndexVec};

use crate::ty;

pub trait ParameterizedOverTcx: 'static {
    type Value<'tcx>;
}

impl<T: ParameterizedOverTcx> ParameterizedOverTcx for &'static [T] {
    type Value<'tcx> = &'tcx [T::Value<'tcx>];
}

impl<T: ParameterizedOverTcx> ParameterizedOverTcx for Option<T> {
    type Value<'tcx> = Option<T::Value<'tcx>>;
}

impl<A: ParameterizedOverTcx, B: ParameterizedOverTcx> ParameterizedOverTcx for (A, B) {
    type Value<'tcx> = (A::Value<'tcx>, B::Value<'tcx>);
}

impl<I: Idx + 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for IndexVec<I, T> {
    type Value<'tcx> = IndexVec<I, T::Value<'tcx>>;
}

impl<I: 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for FxHashMap<I, T> {
    type Value<'tcx> = FxHashMap<I, T::Value<'tcx>>;
}

impl<T: ParameterizedOverTcx> ParameterizedOverTcx for ty::Binder<'static, T> {
    type Value<'tcx> = ty::Binder<'tcx, T::Value<'tcx>>;
}

impl<T: ParameterizedOverTcx> ParameterizedOverTcx for ty::EarlyBinder<T> {
    type Value<'tcx> = ty::EarlyBinder<T::Value<'tcx>>;
}

#[macro_export]
macro_rules! trivially_parameterized_over_tcx {
    ($($ty:ty),+ $(,)?) => {
        $(
            impl $crate::ty::ParameterizedOverTcx for $ty {
                #[allow(unused_lifetimes)]
                type Value<'tcx> = $ty;
            }
        )*
    }
}

trivially_parameterized_over_tcx! {
    usize,
    (),
    u32,
    u64,
    bool,
    std::string::String,
    crate::metadata::ModChild,
    crate::middle::codegen_fn_attrs::CodegenFnAttrs,
    crate::middle::debugger_visualizer::DebuggerVisualizerFile,
    crate::middle::exported_symbols::SymbolExportInfo,
    crate::middle::resolve_bound_vars::ObjectLifetimeDefault,
    crate::mir::ConstQualifs,
    ty::AssocItemContainer,
    ty::Asyncness,
    ty::DeducedParamAttrs,
    ty::Generics,
    ty::ImplPolarity,
    ty::ImplTraitInTraitData,
    ty::ReprOptions,
    ty::TraitDef,
    ty::UnusedGenericParams,
    ty::Visibility<DefIndex>,
    ty::adjustment::CoerceUnsizedInfo,
    ty::fast_reject::SimplifiedType,
    rustc_ast::Attribute,
    rustc_ast::DelimArgs,
    rustc_ast::expand::StrippedCfgItem<rustc_hir::def_id::DefIndex>,
    rustc_attr::ConstStability,
    rustc_attr::DefaultBodyStability,
    rustc_attr::Deprecation,
    rustc_attr::Stability,
    rustc_hir::Constness,
    rustc_hir::Defaultness,
    rustc_hir::GeneratorKind,
    rustc_hir::IsAsync,
    rustc_hir::LangItem,
    rustc_hir::def::DefKind,
    rustc_hir::def::DocLinkResMap,
    rustc_hir::def_id::DefId,
    rustc_hir::def_id::DefIndex,
    rustc_hir::definitions::DefKey,
    rustc_index::bit_set::BitSet<u32>,
    rustc_index::bit_set::FiniteBitSet<u32>,
    rustc_session::cstore::ForeignModule,
    rustc_session::cstore::LinkagePreference,
    rustc_session::cstore::NativeLib,
    rustc_span::ExpnData,
    rustc_span::ExpnHash,
    rustc_span::ExpnId,
    rustc_span::SourceFile,
    rustc_span::Span,
    rustc_span::Symbol,
    rustc_span::def_id::DefPathHash,
    rustc_span::hygiene::SyntaxContextData,
    rustc_span::symbol::Ident,
    rustc_type_ir::Variance,
}

// HACK(compiler-errors): This macro rule can only take a fake path,
// not a real, due to parsing ambiguity reasons.
#[macro_export]
macro_rules! parameterized_over_tcx {
    ($($($fake_path:ident)::+),+ $(,)?) => {
        $(
            impl $crate::ty::ParameterizedOverTcx for $($fake_path)::+<'static> {
                type Value<'tcx> = $($fake_path)::+<'tcx>;
            }
        )*
    }
}

parameterized_over_tcx! {
    crate::middle::exported_symbols::ExportedSymbol,
    crate::mir::Body,
    crate::mir::GeneratorLayout,
    ty::Ty,
    ty::FnSig,
    ty::GenericPredicates,
    ty::TraitRef,
    ty::Const,
    ty::Predicate,
    ty::Clause,
    ty::ClauseKind,
}