compiler/rustc_middle/src/ty/parameterized.rs

   1 use rustc_data_structures::fx::FxHashMap;
   2 use rustc_hir::def_id::{DefId, DefIndex};
   3 use rustc_index::vec::{Idx, IndexVec};
   4
   5 use crate::middle::exported_symbols::ExportedSymbol;
   6 use crate::mir::Body;
   7 use crate::ty::abstract_const::Node;
   8 use crate::ty::{
   9     self, Const, FnSig, GeneratorDiagnosticData, GenericPredicates, Predicate, TraitRef, Ty,
  10 };
  11
  12 pub trait ParameterizedOverTcx: 'static {
  13     #[allow(unused_lifetimes)]
  14     type Value<'tcx>;
  15 }
  16
  17 impl<T: ParameterizedOverTcx> ParameterizedOverTcx for &'static [T] {
  18     type Value<'tcx> = &'tcx [T::Value<'tcx>];
  19 }
  20
  21 impl<T: ParameterizedOverTcx> ParameterizedOverTcx for Option<T> {
  22     type Value<'tcx> = Option<T::Value<'tcx>>;
  23 }
  24
  25 impl<A: ParameterizedOverTcx, B: ParameterizedOverTcx> ParameterizedOverTcx for (A, B) {
  26     type Value<'tcx> = (A::Value<'tcx>, B::Value<'tcx>);
  27 }
  28
  29 impl<I: Idx + 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for IndexVec<I, T> {
  30     type Value<'tcx> = IndexVec<I, T::Value<'tcx>>;
  31 }
  32
  33 impl<I: 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for FxHashMap<I, T> {
  34     type Value<'tcx> = FxHashMap<I, T::Value<'tcx>>;
  35 }
  36
  37 impl<T: ParameterizedOverTcx> ParameterizedOverTcx for ty::Binder<'static, T> {
  38     type Value<'tcx> = ty::Binder<'tcx, T::Value<'tcx>>;
  39 }
  40
  41 #[macro_export]
  42 macro_rules! trivially_parameterized_over_tcx {
  43     ($($ty:ty),+ $(,)?) => {
  44         $(
  45             impl $crate::ty::ParameterizedOverTcx for $ty {
  46                 #[allow(unused_lifetimes)]
  47                 type Value<'tcx> = $ty;
  48             }
  49         )*
  50     }
  51 }
  52
  53 trivially_parameterized_over_tcx! {
  54     usize,
  55     (),
  56     u32,
  57     std::string::String,
  58     crate::metadata::ModChild,
  59     crate::middle::codegen_fn_attrs::CodegenFnAttrs,
  60     crate::middle::exported_symbols::SymbolExportInfo,
  61     crate::middle::resolve_lifetime::ObjectLifetimeDefault,
  62     crate::mir::ConstQualifs,
  63     ty::AssocItemContainer,
  64     ty::DeducedParamAttrs,
  65     ty::Generics,
  66     ty::ImplPolarity,
  67     ty::ReprOptions,
  68     ty::TraitDef,
  69     ty::Visibility<DefIndex>,
  70     ty::adjustment::CoerceUnsizedInfo,
  71     ty::fast_reject::SimplifiedTypeGen<DefId>,
  72     rustc_ast::Attribute,
  73     rustc_ast::DelimArgs,
  74     rustc_attr::ConstStability,
  75     rustc_attr::DefaultBodyStability,
  76     rustc_attr::Deprecation,
  77     rustc_attr::Stability,
  78     rustc_hir::Constness,
  79     rustc_hir::Defaultness,
  80     rustc_hir::GeneratorKind,
  81     rustc_hir::IsAsync,
  82     rustc_hir::LangItem,
  83     rustc_hir::def::DefKind,
  84     rustc_hir::def_id::DefIndex,
  85     rustc_hir::definitions::DefKey,
  86     rustc_index::bit_set::BitSet<u32>,
  87     rustc_index::bit_set::FiniteBitSet<u32>,
  88     rustc_session::cstore::ForeignModule,
  89     rustc_session::cstore::LinkagePreference,
  90     rustc_session::cstore::NativeLib,
  91     rustc_span::DebuggerVisualizerFile,
  92     rustc_span::ExpnData,
  93     rustc_span::ExpnHash,
  94     rustc_span::ExpnId,
  95     rustc_span::SourceFile,
  96     rustc_span::Span,
  97     rustc_span::Symbol,
  98     rustc_span::def_id::DefPathHash,
  99     rustc_span::hygiene::SyntaxContextData,
 100     rustc_span::symbol::Ident,
 101     rustc_type_ir::Variance,
 102 }
 103
 104 // HACK(compiler-errors): This macro rule can only take an ident,
 105 // not a path, due to parsing ambiguity reasons. That means we gotta
 106 // import all of these types above.
 107 #[macro_export]
 108 macro_rules! parameterized_over_tcx {
 109     ($($ident:ident),+ $(,)?) => {
 110         $(
 111             impl $crate::ty::ParameterizedOverTcx for $ident<'static> {
 112                 type Value<'tcx> = $ident<'tcx>;
 113             }
 114         )*
 115     }
 116 }
 117
 118 parameterized_over_tcx! {
 119     Ty,
 120     FnSig,
 121     GenericPredicates,
 122     TraitRef,
 123     Const,
 124     Predicate,
 125     GeneratorDiagnosticData,
 126     Body,
 127     Node,
 128     ExportedSymbol,
 129 }