| // Copyright (C) 2020-2026 Free Software Foundation, Inc. |
| |
| // This file is part of GCC. |
| |
| // GCC is free software; you can redistribute it and/or modify it under |
| // the terms of the GNU General Public License as published by the Free |
| // Software Foundation; either version 3, or (at your option) any later |
| // version. |
| |
| // GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| // WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| // for more details. |
| |
| // You should have received a copy of the GNU General Public License |
| // along with GCC; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| #ifndef RUST_CONST_CHECKER_H |
| #define RUST_CONST_CHECKER_H |
| |
| #include "rust-hir-visitor.h" |
| #include "rust-hir-type-check.h" |
| #include "rust-stacked-contexts.h" |
| #include "rust-name-resolver.h" |
| |
| namespace Rust { |
| namespace HIR { |
| class ConstChecker : public HIRFullVisitor |
| { |
| public: |
| ConstChecker (); |
| |
| void go (HIR::Crate &crate); |
| |
| /** |
| * Check if an item is a const extern item or not |
| * TODO: Move this to a const compilation context class or an attribute |
| * checking class |
| */ |
| static bool is_const_extern_fn (HIR::ExternalFunctionItem &fn); |
| |
| private: |
| /** |
| * Check that only const functions are called in const contexts |
| */ |
| void check_function_call (HirId fn_id, location_t locus); |
| |
| /* All possible const contexts */ |
| enum class ConstGenericCtx |
| { |
| Function, |
| TypeAlias, |
| Struct, |
| Enum, |
| Union, |
| Trait, |
| Impl |
| }; |
| |
| /* Get the string representation of a const context */ |
| const char *ctx_to_str (ConstGenericCtx ctx); |
| |
| /* Check if a const context allows default values */ |
| bool ctx_allows_default (ConstGenericCtx ctx); |
| |
| /** |
| * Check that const generic parameters only contains defaults in allowed |
| * contexts |
| */ |
| void check_default_const_generics ( |
| std::vector<std::unique_ptr<GenericParam>> ¶m, ConstGenericCtx context); |
| |
| StackedContexts<HirId> const_context; |
| Resolver::Resolver &resolver; |
| Analysis::Mappings &mappings; |
| |
| virtual void visit (Lifetime &lifetime) override; |
| virtual void visit (LifetimeParam &lifetime_param) override; |
| virtual void visit (PathInExpression &path) override; |
| virtual void visit (TypePathSegment &segment) override; |
| virtual void visit (TypePathSegmentGeneric &segment) override; |
| virtual void visit (TypePathSegmentFunction &segment) override; |
| virtual void visit (TypePath &path) override; |
| virtual void visit (QualifiedPathInExpression &path) override; |
| virtual void visit (QualifiedPathInType &path) override; |
| virtual void visit (LiteralExpr &expr) override; |
| virtual void visit (BorrowExpr &expr) override; |
| virtual void visit (DereferenceExpr &expr) override; |
| virtual void visit (ErrorPropagationExpr &expr) override; |
| virtual void visit (NegationExpr &expr) override; |
| virtual void visit (ArithmeticOrLogicalExpr &expr) override; |
| virtual void visit (ComparisonExpr &expr) override; |
| virtual void visit (LazyBooleanExpr &expr) override; |
| virtual void visit (TypeCastExpr &expr) override; |
| virtual void visit (AssignmentExpr &expr) override; |
| virtual void visit (CompoundAssignmentExpr &expr) override; |
| virtual void visit (GroupedExpr &expr) override; |
| virtual void visit (ArrayElemsValues &elems) override; |
| virtual void visit (ArrayElemsCopied &elems) override; |
| virtual void visit (ArrayExpr &expr) override; |
| virtual void visit (ArrayIndexExpr &expr) override; |
| virtual void visit (TupleExpr &expr) override; |
| virtual void visit (TupleIndexExpr &expr) override; |
| virtual void visit (StructExprStruct &expr) override; |
| virtual void visit (StructExprFieldIdentifier &field) override; |
| virtual void visit (StructExprFieldIdentifierValue &field) override; |
| virtual void visit (StructExprFieldIndexValue &field) override; |
| virtual void visit (StructExprStructFields &expr) override; |
| virtual void visit (StructExprStructBase &expr) override; |
| virtual void visit (CallExpr &expr) override; |
| virtual void visit (MethodCallExpr &expr) override; |
| virtual void visit (FieldAccessExpr &expr) override; |
| virtual void visit (ClosureExpr &expr) override; |
| virtual void visit (BlockExpr &expr) override; |
| virtual void visit (AnonConst &expr) override; |
| virtual void visit (ConstBlock &expr) override; |
| virtual void visit (ContinueExpr &expr) override; |
| virtual void visit (BreakExpr &expr) override; |
| virtual void visit (RangeFromToExpr &expr) override; |
| virtual void visit (RangeFromExpr &expr) override; |
| virtual void visit (RangeToExpr &expr) override; |
| virtual void visit (RangeFullExpr &expr) override; |
| virtual void visit (RangeFromToInclExpr &expr) override; |
| virtual void visit (RangeToInclExpr &expr) override; |
| virtual void visit (ReturnExpr &expr) override; |
| virtual void visit (UnsafeBlockExpr &expr) override; |
| virtual void visit (LoopExpr &expr) override; |
| virtual void visit (WhileLoopExpr &expr) override; |
| virtual void visit (WhileLetLoopExpr &expr) override; |
| virtual void visit (IfExpr &expr) override; |
| virtual void visit (IfExprConseqElse &expr) override; |
| virtual void visit (MatchExpr &expr) override; |
| virtual void visit (AwaitExpr &expr) override; |
| virtual void visit (AsyncBlockExpr &expr) override; |
| virtual void visit (InlineAsm &expr) override; |
| virtual void visit (LlvmInlineAsm &expr) override; |
| virtual void visit (OffsetOf &expr) override; |
| |
| virtual void visit (TypeParam ¶m) override; |
| virtual void visit (ConstGenericParam ¶m) override; |
| virtual void visit (LifetimeWhereClauseItem &item) override; |
| virtual void visit (TypeBoundWhereClauseItem &item) override; |
| virtual void visit (Module &module) override; |
| virtual void visit (ExternCrate &crate) override; |
| virtual void visit (UseTreeGlob &use_tree) override; |
| virtual void visit (UseTreeList &use_tree) override; |
| virtual void visit (UseTreeRebind &use_tree) override; |
| virtual void visit (UseDeclaration &use_decl) override; |
| virtual void visit (Function &function) override; |
| virtual void visit (TypeAlias &type_alias) override; |
| virtual void visit (StructStruct &struct_item) override; |
| virtual void visit (TupleStruct &tuple_struct) override; |
| virtual void visit (EnumItem &item) override; |
| virtual void visit (EnumItemTuple &item) override; |
| virtual void visit (EnumItemStruct &item) override; |
| virtual void visit (EnumItemDiscriminant &item) override; |
| virtual void visit (Enum &enum_item) override; |
| virtual void visit (Union &union_item) override; |
| virtual void visit (ConstantItem &const_item) override; |
| virtual void visit (StaticItem &static_item) override; |
| virtual void visit (TraitItemFunc &item) override; |
| virtual void visit (TraitItemConst &item) override; |
| virtual void visit (TraitItemType &item) override; |
| virtual void visit (Trait &trait) override; |
| virtual void visit (ImplBlock &impl) override; |
| virtual void visit (ExternalStaticItem &item) override; |
| virtual void visit (ExternalFunctionItem &item) override; |
| virtual void visit (ExternalTypeItem &item) override; |
| virtual void visit (ExternBlock &block) override; |
| virtual void visit (LiteralPattern &pattern) override; |
| virtual void visit (IdentifierPattern &pattern) override; |
| virtual void visit (WildcardPattern &pattern) override; |
| virtual void visit (RangePatternBoundLiteral &bound) override; |
| virtual void visit (RangePatternBoundPath &bound) override; |
| virtual void visit (RangePatternBoundQualPath &bound) override; |
| virtual void visit (RangePattern &pattern) override; |
| virtual void visit (ReferencePattern &pattern) override; |
| virtual void visit (StructPatternFieldTuplePat &field) override; |
| virtual void visit (StructPatternFieldIdentPat &field) override; |
| virtual void visit (StructPatternFieldIdent &field) override; |
| virtual void visit (StructPattern &pattern) override; |
| virtual void visit (TupleStructItemsNoRest &tuple_items) override; |
| virtual void visit (TupleStructItemsHasRest &tuple_items) override; |
| virtual void visit (TupleStructPattern &pattern) override; |
| virtual void visit (TuplePatternItemsNoRest &tuple_items) override; |
| virtual void visit (TuplePatternItemsHasRest &tuple_items) override; |
| virtual void visit (TuplePattern &pattern) override; |
| virtual void visit (SlicePatternItemsNoRest &items) override; |
| virtual void visit (SlicePatternItemsHasRest &items) override; |
| virtual void visit (SlicePattern &pattern) override; |
| virtual void visit (AltPattern &pattern) override; |
| virtual void visit (EmptyStmt &stmt) override; |
| virtual void visit (LetStmt &stmt) override; |
| virtual void visit (ExprStmt &stmt) override; |
| virtual void visit (TraitBound &bound) override; |
| virtual void visit (ImplTraitType &type) override; |
| virtual void visit (TraitObjectType &type) override; |
| virtual void visit (ParenthesisedType &type) override; |
| virtual void visit (TupleType &type) override; |
| virtual void visit (NeverType &type) override; |
| virtual void visit (RawPointerType &type) override; |
| virtual void visit (ReferenceType &type) override; |
| virtual void visit (ArrayType &type) override; |
| virtual void visit (SliceType &type) override; |
| virtual void visit (InferredType &type) override; |
| virtual void visit (BareFunctionType &type) override; |
| }; |
| |
| } // namespace HIR |
| } // namespace Rust |
| |
| #endif /* !RUST_CONST_CHECKER_H */ |
