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bd4b73755b
llvm-project 4c484f11d355e4293f7b245a9330f0a1e89630ac updated the `DenseMapInfo` template to take a SFINAE template parameter.
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
//===--- Located.h - Source Location and Associated Value ----------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2019 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Provides a currency data type Located<T> that should be used instead
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// of std::pair<T, SourceLoc>.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_LOCATED_H
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#define SWIFT_BASIC_LOCATED_H
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#include "swift/Basic/Debug.h"
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#include "swift/Basic/LLVM.h"
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#include "swift/Basic/SourceLoc.h"
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namespace swift {
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/// A currency type for keeping track of items which were found in the source code.
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/// Several parts of the compiler need to keep track of a `SourceLoc` corresponding
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/// to an item, in case they need to report some diagnostics later. For example,
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/// the ClangImporter needs to keep track of where imports were originally written.
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/// Located makes it easy to do so while making the code more readable, compared to
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/// using `std::pair`.
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template <typename T>
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struct Located {
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/// The main item whose source location is being tracked.
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T Item;
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/// The original source location from which the item was parsed.
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SourceLoc Loc;
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Located() : Item(), Loc() {}
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Located(T Item, SourceLoc loc) : Item(Item), Loc(loc) {}
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SWIFT_DEBUG_DUMP;
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void dump(raw_ostream &os) const;
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};
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template <typename T>
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bool operator ==(const Located<T> &lhs, const Located<T> &rhs) {
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return lhs.Item == rhs.Item && lhs.Loc == rhs.Loc;
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}
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} // end namespace swift
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namespace llvm {
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template <typename T, typename Enable> struct DenseMapInfo;
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template<typename T>
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struct DenseMapInfo<swift::Located<T>> {
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static inline swift::Located<T> getEmptyKey() {
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return swift::Located<T>(DenseMapInfo<T>::getEmptyKey(),
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DenseMapInfo<swift::SourceLoc>::getEmptyKey());
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}
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static inline swift::Located<T> getTombstoneKey() {
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return swift::Located<T>(DenseMapInfo<T>::getTombstoneKey(),
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DenseMapInfo<swift::SourceLoc>::getTombstoneKey());
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}
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static unsigned getHashValue(const swift::Located<T> &LocatedVal) {
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return combineHashValue(DenseMapInfo<T>::getHashValue(LocatedVal.Item),
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DenseMapInfo<swift::SourceLoc>::getHashValue(LocatedVal.Loc));
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}
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static bool isEqual(const swift::Located<T> &LHS, const swift::Located<T> &RHS) {
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return DenseMapInfo<T>::isEqual(LHS.Item, RHS.Item) &&
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DenseMapInfo<T>::isEqual(LHS.Loc, RHS.Loc);
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}
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};
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} // namespace llvm
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#endif // SWIFT_BASIC_LOCATED_H
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