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📄 AnalysisBasedWarnings.h(2.72 KB)
📄 CXXFieldCollector.h(2.5 KB)
📄 CleanupInfo.h(1.28 KB)
📄 CodeCompleteConsumer.h(41.13 KB)
📄 CodeCompleteOptions.h(1.85 KB)
📄 DeclSpec.h(98.42 KB)
📄 DelayedDiagnostic.h(10.8 KB)
📄 Designator.h(6.43 KB)
📄 ExternalSemaSource.h(9.7 KB)
📄 IdentifierResolver.h(6.46 KB)
📄 Initialization.h(48.15 KB)
📄 Lookup.h(25.5 KB)
📄 MultiplexExternalSemaSource.h(15.39 KB)
📄 ObjCMethodList.h(2.21 KB)
📄 Overload.h(41.57 KB)
📄 Ownership.h(9.58 KB)
📄 ParsedAttr.h(39.62 KB)
📄 ParsedTemplate.h(9.9 KB)
📄 Scope.h(17.01 KB)
📄 ScopeInfo.h(36.31 KB)
📄 Sema.h(569.19 KB)
📄 SemaConcept.h(5.51 KB)
📄 SemaConsumer.h(1.49 KB)
📄 SemaDiagnostic.h(501 B)
📄 SemaFixItUtils.h(3.21 KB)
📄 SemaInternal.h(12.72 KB)
📄 SemaLambda.h(1.28 KB)
📄 Template.h(23.11 KB)
📄 TemplateDeduction.h(12.2 KB)
📄 TemplateInstCallback.h(2.55 KB)
📄 TypoCorrection.h(15.04 KB)
📄 Weak.h(1.54 KB)

Editing: Ownership.h

//===- Ownership.h - Parser ownership helpers -------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
//  This file contains classes for managing ownership of Stmt and Expr nodes.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_SEMA_OWNERSHIP_H
#define LLVM_CLANG_SEMA_OWNERSHIP_H

#include "clang/AST/Expr.h"
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/PointerLikeTypeTraits.h"
#include "llvm/Support/type_traits.h"
#include <cassert>
#include <cstddef>
#include <cstdint>

//===----------------------------------------------------------------------===//
// OpaquePtr
//===----------------------------------------------------------------------===//

namespace clang {

class CXXBaseSpecifier;
class CXXCtorInitializer;
class Decl;
class Expr;
class ParsedTemplateArgument;
class QualType;
class Stmt;
class TemplateName;
class TemplateParameterList;

/// Wrapper for void* pointer.
  /// \tparam PtrTy Either a pointer type like 'T*' or a type that behaves like
  ///               a pointer.
  ///
  /// This is a very simple POD type that wraps a pointer that the Parser
  /// doesn't know about but that Sema or another client does.  The PtrTy
  /// template argument is used to make sure that "Decl" pointers are not
  /// compatible with "Type" pointers for example.
  template <class PtrTy>
  class OpaquePtr {
    void *Ptr = nullptr;

explicit OpaquePtr(void *Ptr) : Ptr(Ptr) {}

using Traits = llvm::PointerLikeTypeTraits<PtrTy>;

public:
    OpaquePtr(std::nullptr_t = nullptr) {}

static OpaquePtr make(PtrTy P) { OpaquePtr OP; OP.set(P); return OP; }

/// Returns plain pointer to the entity pointed by this wrapper.
    /// \tparam PointeeT Type of pointed entity.
    ///
    /// It is identical to getPtrAs<PointeeT*>.
    template <typename PointeeT> PointeeT* getPtrTo() const {
      return get();
    }

/// Returns pointer converted to the specified type.
    /// \tparam PtrT Result pointer type.  There must be implicit conversion
    ///              from PtrTy to PtrT.
    ///
    /// In contrast to getPtrTo, this method allows the return type to be
    /// a smart pointer.
    template <typename PtrT> PtrT getPtrAs() const {
      return get();
    }

PtrTy get() const {
      return Traits::getFromVoidPointer(Ptr);
    }

void set(PtrTy P) {
      Ptr = Traits::getAsVoidPointer(P);
    }

explicit operator bool() const { return Ptr != nullptr; }

void *getAsOpaquePtr() const { return Ptr; }
    static OpaquePtr getFromOpaquePtr(void *P) { return OpaquePtr(P); }
  };

/// UnionOpaquePtr - A version of OpaquePtr suitable for membership
  /// in a union.
  template <class T> struct UnionOpaquePtr {
    void *Ptr;

static UnionOpaquePtr make(OpaquePtr<T> P) {
      UnionOpaquePtr OP = { P.getAsOpaquePtr() };
      return OP;
    }

OpaquePtr<T> get() const { return OpaquePtr<T>::getFromOpaquePtr(Ptr); }
    operator OpaquePtr<T>() const { return get(); }

UnionOpaquePtr &operator=(OpaquePtr<T> P) {
      Ptr = P.getAsOpaquePtr();
      return *this;
    }
  };

} // namespace clang

namespace llvm {

template <class T>
  struct PointerLikeTypeTraits<clang::OpaquePtr<T>> {
    static constexpr int NumLowBitsAvailable = 0;

static inline void *getAsVoidPointer(clang::OpaquePtr<T> P) {
      // FIXME: Doesn't work? return P.getAs< void >();
      return P.getAsOpaquePtr();
    }

static inline clang::OpaquePtr<T> getFromVoidPointer(void *P) {
      return clang::OpaquePtr<T>::getFromOpaquePtr(P);
    }
  };

} // namespace llvm

namespace clang {

// Basic
  class DiagnosticBuilder;

// Determines whether the low bit of the result pointer for the
  // given UID is always zero. If so, ActionResult will use that bit
  // for it's "invalid" flag.
  template<class Ptr>
  struct IsResultPtrLowBitFree {
    static const bool value = false;
  };

/// ActionResult - This structure is used while parsing/acting on
  /// expressions, stmts, etc.  It encapsulates both the object returned by
  /// the action, plus a sense of whether or not it is valid.
  /// When CompressInvalid is true, the "invalid" flag will be
  /// stored in the low bit of the Val pointer.
  template<class PtrTy,
           bool CompressInvalid = IsResultPtrLowBitFree<PtrTy>::value>
  class ActionResult {
    PtrTy Val;
    bool Invalid;

public:
    ActionResult(bool Invalid = false) : Val(PtrTy()), Invalid(Invalid) {}
    ActionResult(PtrTy val) : Val(val), Invalid(false) {}
    ActionResult(const DiagnosticBuilder &) : Val(PtrTy()), Invalid(true) {}

// These two overloads prevent void* -> bool conversions.
    ActionResult(const void *) = delete;
    ActionResult(volatile void *) = delete;

bool isInvalid() const { return Invalid; }
    bool isUsable() const { return !Invalid && Val; }
    bool isUnset() const { return !Invalid && !Val; }

PtrTy get() const { return Val; }
    template <typename T> T *getAs() { return static_cast<T*>(get()); }

void set(PtrTy V) { Val = V; }

const ActionResult &operator=(PtrTy RHS) {
      Val = RHS;
      Invalid = false;
      return *this;
    }
  };

// This ActionResult partial specialization places the "invalid"
  // flag into the low bit of the pointer.
  template<typename PtrTy>
  class ActionResult<PtrTy, true> {
    // A pointer whose low bit is 1 if this result is invalid, 0
    // otherwise.
    uintptr_t PtrWithInvalid;

using PtrTraits = llvm::PointerLikeTypeTraits<PtrTy>;

public:
    ActionResult(bool Invalid = false)
        : PtrWithInvalid(static_cast<uintptr_t>(Invalid)) {}

ActionResult(PtrTy V) {
      void *VP = PtrTraits::getAsVoidPointer(V);
      PtrWithInvalid = reinterpret_cast<uintptr_t>(VP);
      assert((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer");
    }

ActionResult(const DiagnosticBuilder &) : PtrWithInvalid(0x01) {}

// These two overloads prevent void* -> bool conversions.
    ActionResult(const void *) = delete;
    ActionResult(volatile void *) = delete;

bool isInvalid() const { return PtrWithInvalid & 0x01; }
    bool isUsable() const { return PtrWithInvalid > 0x01; }
    bool isUnset() const { return PtrWithInvalid == 0; }

PtrTy get() const {
      void *VP = reinterpret_cast<void *>(PtrWithInvalid & ~0x01);
      return PtrTraits::getFromVoidPointer(VP);
    }

template <typename T> T *getAs() { return static_cast<T*>(get()); }

void set(PtrTy V) {
      void *VP = PtrTraits::getAsVoidPointer(V);
      PtrWithInvalid = reinterpret_cast<uintptr_t>(VP);
      assert((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer");
    }

const ActionResult &operator=(PtrTy RHS) {
      void *VP = PtrTraits::getAsVoidPointer(RHS);
      PtrWithInvalid = reinterpret_cast<uintptr_t>(VP);
      assert((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer");
      return *this;
    }

// For types where we can fit a flag in with the pointer, provide
    // conversions to/from pointer type.
    static ActionResult getFromOpaquePointer(void *P) {
      ActionResult Result;
      Result.PtrWithInvalid = (uintptr_t)P;
      return Result;
    }
    void *getAsOpaquePointer() const { return (void*)PtrWithInvalid; }
  };

/// An opaque type for threading parsed type information through the
  /// parser.
  using ParsedType = OpaquePtr<QualType>;
  using UnionParsedType = UnionOpaquePtr<QualType>;

// We can re-use the low bit of expression, statement, base, and
  // member-initializer pointers for the "invalid" flag of
  // ActionResult.
  template<> struct IsResultPtrLowBitFree<Expr*> {
    static const bool value = true;
  };
  template<> struct IsResultPtrLowBitFree<Stmt*> {
    static const bool value = true;
  };
  template<> struct IsResultPtrLowBitFree<CXXBaseSpecifier*> {
    static const bool value = true;
  };
  template<> struct IsResultPtrLowBitFree<CXXCtorInitializer*> {
    static const bool value = true;
  };

using ExprResult = ActionResult<Expr *>;
  using StmtResult = ActionResult<Stmt *>;
  using TypeResult = ActionResult<ParsedType>;
  using BaseResult = ActionResult<CXXBaseSpecifier *>;
  using MemInitResult = ActionResult<CXXCtorInitializer *>;

using DeclResult = ActionResult<Decl *>;
  using ParsedTemplateTy = OpaquePtr<TemplateName>;
  using UnionParsedTemplateTy = UnionOpaquePtr<TemplateName>;

using MultiExprArg = MutableArrayRef<Expr *>;
  using MultiStmtArg = MutableArrayRef<Stmt *>;
  using ASTTemplateArgsPtr = MutableArrayRef<ParsedTemplateArgument>;
  using MultiTypeArg = MutableArrayRef<ParsedType>;
  using MultiTemplateParamsArg = MutableArrayRef<TemplateParameterList *>;

inline ExprResult ExprError() { return ExprResult(true); }
  inline StmtResult StmtError() { return StmtResult(true); }
  inline TypeResult TypeError() { return TypeResult(true); }

inline ExprResult ExprError(const DiagnosticBuilder&) { return ExprError(); }
  inline StmtResult StmtError(const DiagnosticBuilder&) { return StmtError(); }

inline ExprResult ExprEmpty() { return ExprResult(false); }
  inline StmtResult StmtEmpty() { return StmtResult(false); }

inline Expr *AssertSuccess(ExprResult R) {
    assert(!R.isInvalid() && "operation was asserted to never fail!");
    return R.get();
  }

inline Stmt *AssertSuccess(StmtResult R) {
    assert(!R.isInvalid() && "operation was asserted to never fail!");
    return R.get();
  }

} // namespace clang

#endif // LLVM_CLANG_SEMA_OWNERSHIP_H

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Editing: Ownership.h

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