clang
3.7.0
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A C++ dynamic_cast
expression (C++ [expr.dynamic.cast]).
More...
#include <ExprCXX.h>
Public Member Functions | |
bool | isAlwaysNull () const |
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const char * | getCastName () const |
SourceLocation | getOperatorLoc () const |
Retrieve the location of the cast operator keyword, e.g., static_cast . More... | |
SourceLocation | getRParenLoc () const |
Retrieve the location of the closing parenthesis. More... | |
SourceLocation | getLocStart () const LLVM_READONLY |
SourceLocation | getLocEnd () const LLVM_READONLY |
SourceRange | getAngleBrackets () const LLVM_READONLY |
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TypeSourceInfo * | getTypeInfoAsWritten () const |
void | setTypeInfoAsWritten (TypeSourceInfo *writtenTy) |
QualType | getTypeAsWritten () const |
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CastKind | getCastKind () const |
void | setCastKind (CastKind K) |
const char * | getCastKindName () const |
Expr * | getSubExpr () |
const Expr * | getSubExpr () const |
void | setSubExpr (Expr *E) |
Expr * | getSubExprAsWritten () |
Retrieve the cast subexpression as it was written in the source code, looking through any implicit casts or other intermediate nodes introduced by semantic analysis. More... | |
const Expr * | getSubExprAsWritten () const |
bool | path_empty () const |
unsigned | path_size () const |
path_iterator | path_begin () |
path_iterator | path_end () |
path_const_iterator | path_begin () const |
path_const_iterator | path_end () const |
void | setCastPath (const CXXCastPath &Path) |
child_range | children () |
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QualType | getType () const |
void | setType (QualType t) |
bool | isValueDependent () const |
void | setValueDependent (bool VD) |
Set whether this expression is value-dependent or not. More... | |
bool | isTypeDependent () const |
void | setTypeDependent (bool TD) |
Set whether this expression is type-dependent or not. More... | |
bool | isInstantiationDependent () const |
Whether this expression is instantiation-dependent, meaning that it depends in some way on a template parameter, even if neither its type nor (constant) value can change due to the template instantiation. More... | |
void | setInstantiationDependent (bool ID) |
Set whether this expression is instantiation-dependent or not. More... | |
bool | containsUnexpandedParameterPack () const |
Whether this expression contains an unexpanded parameter pack (for C++11 variadic templates). More... | |
void | setContainsUnexpandedParameterPack (bool PP=true) |
Set the bit that describes whether this expression contains an unexpanded parameter pack. More... | |
SourceLocation | getExprLoc () const LLVM_READONLY |
bool | isUnusedResultAWarning (const Expr *&WarnExpr, SourceLocation &Loc, SourceRange &R1, SourceRange &R2, ASTContext &Ctx) const |
bool | isLValue () const |
bool | isRValue () const |
bool | isXValue () const |
bool | isGLValue () const |
LValueClassification | ClassifyLValue (ASTContext &Ctx) const |
Reasons why an expression might not be an l-value. More... | |
isModifiableLvalueResult | isModifiableLvalue (ASTContext &Ctx, SourceLocation *Loc=nullptr) const |
Classification | Classify (ASTContext &Ctx) const |
Classify - Classify this expression according to the C++11 expression taxonomy. More... | |
Classification | ClassifyModifiable (ASTContext &Ctx, SourceLocation &Loc) const |
ClassifyModifiable - Classify this expression according to the C++11 expression taxonomy, and see if it is valid on the left side of an assignment. More... | |
ExprValueKind | getValueKind () const |
getValueKind - The value kind that this expression produces. More... | |
ExprObjectKind | getObjectKind () const |
bool | isOrdinaryOrBitFieldObject () const |
void | setValueKind (ExprValueKind Cat) |
setValueKind - Set the value kind produced by this expression. More... | |
void | setObjectKind (ExprObjectKind Cat) |
setObjectKind - Set the object kind produced by this expression. More... | |
bool | refersToBitField () const |
Returns true if this expression is a gl-value that potentially refers to a bit-field. More... | |
FieldDecl * | getSourceBitField () |
If this expression refers to a bit-field, retrieve the declaration of that bit-field. More... | |
const FieldDecl * | getSourceBitField () const |
const ObjCPropertyRefExpr * | getObjCProperty () const |
If this expression is an l-value for an Objective C property, find the underlying property reference expression. More... | |
bool | isObjCSelfExpr () const |
Check if this expression is the ObjC 'self' implicit parameter. More... | |
bool | refersToVectorElement () const |
Returns whether this expression refers to a vector element. More... | |
bool | hasPlaceholderType () const |
Returns whether this expression has a placeholder type. More... | |
bool | hasPlaceholderType (BuiltinType::Kind K) const |
Returns whether this expression has a specific placeholder type. More... | |
bool | isKnownToHaveBooleanValue () const |
bool | isIntegerConstantExpr (llvm::APSInt &Result, const ASTContext &Ctx, SourceLocation *Loc=nullptr, bool isEvaluated=true) const |
bool | isIntegerConstantExpr (const ASTContext &Ctx, SourceLocation *Loc=nullptr) const |
bool | isCXX98IntegralConstantExpr (const ASTContext &Ctx) const |
bool | isCXX11ConstantExpr (const ASTContext &Ctx, APValue *Result=nullptr, SourceLocation *Loc=nullptr) const |
bool | isConstantInitializer (ASTContext &Ctx, bool ForRef, const Expr **Culprit=nullptr) const |
bool | EvaluateAsRValue (EvalResult &Result, const ASTContext &Ctx) const |
bool | EvaluateAsBooleanCondition (bool &Result, const ASTContext &Ctx) const |
bool | EvaluateAsInt (llvm::APSInt &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) const |
bool | isEvaluatable (const ASTContext &Ctx) const |
bool | HasSideEffects (const ASTContext &Ctx, bool IncludePossibleEffects=true) const |
bool | hasNonTrivialCall (const ASTContext &Ctx) const |
Determine whether this expression involves a call to any function that is not trivial. More... | |
llvm::APSInt | EvaluateKnownConstInt (const ASTContext &Ctx, SmallVectorImpl< PartialDiagnosticAt > *Diag=nullptr) const |
void | EvaluateForOverflow (const ASTContext &Ctx) const |
bool | EvaluateAsLValue (EvalResult &Result, const ASTContext &Ctx) const |
bool | EvaluateAsInitializer (APValue &Result, const ASTContext &Ctx, const VarDecl *VD, SmallVectorImpl< PartialDiagnosticAt > &Notes) const |
bool | EvaluateWithSubstitution (APValue &Value, ASTContext &Ctx, const FunctionDecl *Callee, ArrayRef< const Expr * > Args) const |
NullPointerConstantKind | isNullPointerConstant (ASTContext &Ctx, NullPointerConstantValueDependence NPC) const |
bool | isOBJCGCCandidate (ASTContext &Ctx) const |
bool | isBoundMemberFunction (ASTContext &Ctx) const |
Returns true if this expression is a bound member function. More... | |
Expr * | IgnoreImpCasts () LLVM_READONLY |
Expr * | IgnoreImplicit () LLVM_READONLY |
const Expr * | IgnoreImplicit () const LLVM_READONLY |
Expr * | IgnoreParens () LLVM_READONLY |
Expr * | IgnoreParenCasts () LLVM_READONLY |
Expr * | IgnoreCasts () LLVM_READONLY |
Ignore casts. Strip off any CastExprs, returning their operand. More... | |
Expr * | IgnoreParenImpCasts () LLVM_READONLY |
Expr * | IgnoreConversionOperator () LLVM_READONLY |
const Expr * | IgnoreConversionOperator () const LLVM_READONLY |
const Expr * | IgnoreParenImpCasts () const LLVM_READONLY |
Expr * | IgnoreParenLValueCasts () LLVM_READONLY |
const Expr * | IgnoreParenLValueCasts () const LLVM_READONLY |
Expr * | IgnoreParenNoopCasts (ASTContext &Ctx) LLVM_READONLY |
Expr * | ignoreParenBaseCasts () LLVM_READONLY |
Ignore parentheses and derived-to-base casts. More... | |
const Expr * | ignoreParenBaseCasts () const LLVM_READONLY |
bool | isDefaultArgument () const |
Determine whether this expression is a default function argument. More... | |
bool | isTemporaryObject (ASTContext &Ctx, const CXXRecordDecl *TempTy) const |
Determine whether the result of this expression is a temporary object of the given class type. More... | |
bool | isImplicitCXXThis () const |
Whether this expression is an implicit reference to 'this' in C++. More... | |
const Expr * | IgnoreImpCasts () const LLVM_READONLY |
const Expr * | IgnoreParens () const LLVM_READONLY |
const Expr * | IgnoreParenCasts () const LLVM_READONLY |
const Expr * | IgnoreCasts () const LLVM_READONLY |
Strip off casts, but keep parentheses. More... | |
const Expr * | IgnoreParenNoopCasts (ASTContext &Ctx) const LLVM_READONLY |
const CXXRecordDecl * | getBestDynamicClassType () const |
For an expression of class type or pointer to class type, return the most derived class decl the expression is known to refer to. More... | |
const Expr * | skipRValueSubobjectAdjustments (SmallVectorImpl< const Expr * > &CommaLHS, SmallVectorImpl< SubobjectAdjustment > &Adjustments) const |
Static Public Member Functions | |
static CXXDynamicCastExpr * | Create (const ASTContext &Context, QualType T, ExprValueKind VK, CastKind Kind, Expr *Op, const CXXCastPath *Path, TypeSourceInfo *Written, SourceLocation L, SourceLocation RParenLoc, SourceRange AngleBrackets) |
static CXXDynamicCastExpr * | CreateEmpty (const ASTContext &Context, unsigned pathSize) |
static bool | classof (const Stmt *T) |
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static bool | classof (const Stmt *T) |
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static bool | classof (const Stmt *T) |
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static bool | classof (const Stmt *T) |
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static ExprValueKind | getValueKindForType (QualType T) |
static bool | isPotentialConstantExpr (const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags) |
static bool | isPotentialConstantExprUnevaluated (Expr *E, const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags) |
static QualType | findBoundMemberType (const Expr *expr) |
Given an expression of bound-member type, find the type of the member. Returns null if this is an overloaded bound member expression. More... | |
static bool | hasAnyTypeDependentArguments (ArrayRef< Expr * > Exprs) |
static bool | classof (const Stmt *T) |
A C++ dynamic_cast
expression (C++ [expr.dynamic.cast]).
This expression node represents a dynamic cast, e.g., dynamic_cast<Derived*>(BasePtr)
. Such a cast may perform a run-time check to determine how to perform the type conversion.
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Definition at line 606 of file ExprCXX.cpp.
References clang::ASTContext::Allocate(), and clang::CastExpr::setCastPath().
Referenced by clang::Sema::BuildCXXNamedCast().
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Definition at line 624 of file ExprCXX.cpp.
References clang::ASTContext::Allocate().
bool CXXDynamicCastExpr::isAlwaysNull | ( | ) | const |
isAlwaysNull - Return whether the result of the dynamic_cast is proven to always be null. For example:
struct A { }; struct B final : A { }; struct C { };
C f(B b) { return dynamic_cast<C*>(b); }
Definition at line 639 of file ExprCXX.cpp.
References clang::Type::castAs(), clang::Type::getAs(), clang::Type::getPointeeType(), clang::CastExpr::getSubExpr(), clang::Expr::getType(), clang::Decl::hasAttr(), clang::CXXRecordDecl::isDerivedFrom(), and clang::Type::isVoidType().
Referenced by clang::CodeGen::CodeGenFunction::EmitDynamicCast().