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5e74df3882
This required a bit of a generalization of `TrapLabelStore` to not work only with pointers.
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
#pragma once
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#include <variant>
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#include <cassert>
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#include <optional>
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#include <unordered_map>
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#include <swift/AST/ASTVisitor.h>
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#include "swift/extractor/trap/TrapLabel.h"
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#include "swift/extractor/trap/TrapTagTraits.h"
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#include "swift/extractor/trap/generated/TrapTags.h"
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namespace codeql {
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// The extraction is done in a lazy/on-demand fashion:
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// Each emitted TRAP entry for an AST node gets a TRAP label assigned to it.
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// To avoid re-emission, we store the "AST node <> label" entry in the TrapLabelStore.
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// The template parameters `Ts...` indicate to what entity types we restrict the storage
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template <typename... Ts>
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class TrapLabelStore {
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public:
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using Handle = std::variant<std::monostate, Ts...>;
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template <typename T>
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std::optional<TrapLabelOf<T>> get(const T& e) {
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if (auto found = store_.find(e); found != store_.end()) {
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return TrapLabelOf<T>::unsafeCreateFromUntyped(found->second);
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}
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return std::nullopt;
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}
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template <typename T>
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void insert(const T& e, TrapLabelOf<T> l) {
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auto [_, inserted] = store_.emplace(e, l);
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assert(inserted && "already inserted");
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}
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private:
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std::unordered_map<Handle, UntypedTrapLabel> store_;
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};
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} // namespace codeql
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