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66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef EXECUTABLE_SEMANTICS_AST_STATIC_SCOPE_H_
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#define EXECUTABLE_SEMANTICS_AST_STATIC_SCOPE_H_
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#include <string>
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#include <unordered_map>
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#include <variant>
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#include <vector>
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#include "executable_semantics/ast/source_location.h"
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#include "executable_semantics/common/nonnull.h"
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namespace Carbon {
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class NamedEntityInterface {
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public:
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enum class NamedEntityKind {
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// Includes variable definitions and matching contexts.
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BindingPattern,
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// Used by entries in choices.
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ChoiceDeclarationAlternative,
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// Used by continuations.
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Continuation,
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// Includes choices, classes, and functions. Variables are handled through
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// BindingPattern.
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Declaration,
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// Used by functions.
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GenericBinding,
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// Used by entries in classes.
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Member,
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};
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NamedEntityInterface() = default;
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virtual ~NamedEntityInterface() = default;
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NamedEntityInterface(NamedEntityInterface&&) = delete;
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auto operator=(NamedEntityInterface&&) -> NamedEntityInterface& = delete;
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// TODO: This is unused, but is intended for casts after lookup.
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virtual auto named_entity_kind() const -> NamedEntityKind = 0;
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virtual auto source_loc() const -> SourceLocation = 0;
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};
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// The set of declared names in a scope. This is not aware of child scopes, but
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// does include directions to parent or related scopes for lookup purposes.
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class StaticScope {
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public:
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void Add(std::string name, Nonnull<const NamedEntityInterface*> entity);
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private:
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// Maps locally declared names to their entities.
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std::unordered_map<std::string, Nonnull<const NamedEntityInterface*>>
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declared_names_;
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// A list of scopes used for name lookup within this scope.
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// TODO: This is unused, but is intended for name lookup cross-scope.
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std::vector<Nonnull<StaticScope*>> parent_scopes_;
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};
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_AST_STATIC_SCOPE_H_
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