clang  6.0.0svn
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clang::MSDependentExistsStmt Class Reference

Representation of a Microsoft __if_exists or __if_not_exists statement with a dependent name. More...

#include "clang/AST/StmtCXX.h"

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Public Member Functions

 MSDependentExistsStmt (SourceLocation KeywordLoc, bool IsIfExists, NestedNameSpecifierLoc QualifierLoc, DeclarationNameInfo NameInfo, CompoundStmt *SubStmt)
 
SourceLocation getKeywordLoc () const
 Retrieve the location of the __if_exists or __if_not_exists keyword. More...
 
bool isIfExists () const
 Determine whether this is an __if_exists statement. More...
 
bool isIfNotExists () const
 Determine whether this is an __if_exists statement. More...
 
NestedNameSpecifierLoc getQualifierLoc () const
 Retrieve the nested-name-specifier that qualifies this name, if any. More...
 
DeclarationNameInfo getNameInfo () const
 Retrieve the name of the entity we're testing for, along with location information. More...
 
CompoundStmtgetSubStmt () const
 Retrieve the compound statement that will be included in the program only if the existence of the symbol matches the initial keyword. More...
 
SourceLocation getLocStart () const LLVM_READONLY
 
SourceLocation getLocEnd () const LLVM_READONLY
 
child_range children ()
 
- Public Member Functions inherited from clang::Stmt
void * operator new (size_t bytes, const ASTContext &C, unsigned alignment=8)
 
void * operator new (size_t bytes, const ASTContext *C, unsigned alignment=8)
 
void * operator new (size_t bytes, void *mem) noexcept
 
void operator delete (void *, const ASTContext &, unsigned) noexcept
 
void operator delete (void *, const ASTContext *, unsigned) noexcept
 
void operator delete (void *, size_t) noexcept
 
void operator delete (void *, void *) noexcept
 
 Stmt (StmtClass SC)
 
StmtClass getStmtClass () const
 
const char * getStmtClassName () const
 
SourceRange getSourceRange () const LLVM_READONLY
 SourceLocation tokens are not useful in isolation - they are low level value objects created/interpreted by SourceManager. More...
 
SourceLocation getLocStart () const LLVM_READONLY
 
SourceLocation getLocEnd () const LLVM_READONLY
 
void dump () const
 Dumps the specified AST fragment and all subtrees to llvm::errs(). More...
 
void dump (SourceManager &SM) const
 
void dump (raw_ostream &OS, SourceManager &SM) const
 
void dump (raw_ostream &OS) const
 
void dumpColor () const
 dumpColor - same as dump(), but forces color highlighting. More...
 
void dumpPretty (const ASTContext &Context) const
 dumpPretty/printPretty - These two methods do a "pretty print" of the AST back to its original source language syntax. More...
 
void printPretty (raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, const ASTContext *Context=nullptr) const
 
void viewAST () const
 viewAST - Visualize an AST rooted at this Stmt* using GraphViz. More...
 
StmtIgnoreImplicit ()
 Skip past any implicit AST nodes which might surround this statement, such as ExprWithCleanups or ImplicitCastExpr nodes. More...
 
const StmtIgnoreImplicit () const
 
StmtIgnoreContainers (bool IgnoreCaptured=false)
 Skip no-op (attributed, compound) container stmts and skip captured stmt at the top, if IgnoreCaptured is true. More...
 
const StmtstripLabelLikeStatements () const
 Strip off all label-like statements. More...
 
StmtstripLabelLikeStatements ()
 
child_range children ()
 
const_child_range children () const
 
child_iterator child_begin ()
 
child_iterator child_end ()
 
const_child_iterator child_begin () const
 
const_child_iterator child_end () const
 
void Profile (llvm::FoldingSetNodeID &ID, const ASTContext &Context, bool Canonical) const
 Produce a unique representation of the given statement. More...
 
void ProcessODRHash (llvm::FoldingSetNodeID &ID, ODRHash &Hash) const
 Calculate a unique representation for a statement that is stable across compiler invocations. More...
 

Static Public Member Functions

static bool classof (const Stmt *T)
 
- Static Public Member Functions inherited from clang::Stmt
static void addStmtClass (const StmtClass s)
 
static void EnableStatistics ()
 
static void PrintStats ()
 

Friends

class ASTReader
 
class ASTStmtReader
 

Additional Inherited Members

- Public Types inherited from clang::Stmt
enum  StmtClass { NoStmtClass = 0 }
 
typedef StmtIterator child_iterator
 Child Iterators: All subclasses must implement 'children' to permit easy iteration over the substatements/subexpessions of an AST node. More...
 
typedef ConstStmtIterator const_child_iterator
 
typedef llvm::iterator_range< child_iteratorchild_range
 
typedef llvm::iterator_range< const_child_iteratorconst_child_range
 
- Protected Types inherited from clang::Stmt
enum  { NumStmtBits = 8 }
 
enum  { NumExprBits = 17 }
 
enum  APFloatSemantics {
  IEEEhalf, IEEEsingle, IEEEdouble, x87DoubleExtended,
  IEEEquad, PPCDoubleDouble
}
 
- Protected Member Functions inherited from clang::Stmt
void * operator new (size_t bytes) noexcept
 
void operator delete (void *data) noexcept
 
 Stmt (StmtClass SC, EmptyShell)
 Construct an empty statement. More...
 
- Protected Attributes inherited from clang::Stmt
union {
   StmtBitfields   StmtBits
 
   CompoundStmtBitfields   CompoundStmtBits
 
   IfStmtBitfields   IfStmtBits
 
   ExprBitfields   ExprBits
 
   CharacterLiteralBitfields   CharacterLiteralBits
 
   FloatingLiteralBitfields   FloatingLiteralBits
 
   UnaryExprOrTypeTraitExprBitfields   UnaryExprOrTypeTraitExprBits
 
   DeclRefExprBitfields   DeclRefExprBits
 
   CastExprBitfields   CastExprBits
 
   CallExprBitfields   CallExprBits
 
   ExprWithCleanupsBitfields   ExprWithCleanupsBits
 
   PseudoObjectExprBitfields   PseudoObjectExprBits
 
   ObjCIndirectCopyRestoreExprBitfields   ObjCIndirectCopyRestoreExprBits
 
   InitListExprBitfields   InitListExprBits
 
   TypeTraitExprBitfields   TypeTraitExprBits
 
   CoawaitExprBitfields   CoawaitBits
 
}; 
 

Detailed Description

Representation of a Microsoft __if_exists or __if_not_exists statement with a dependent name.

The __if_exists statement can be used to include a sequence of statements in the program only when a particular dependent name does not exist. For example:

template<typename T>
void call_foo(T &t) {
__if_exists (T::foo) {
t.foo(); // okay: only called when T::foo exists.
}
}

Similarly, the __if_not_exists statement can be used to include the statements when a particular name does not exist.

Note that this statement only captures __if_exists and __if_not_exists statements whose name is dependent. All non-dependent cases are handled directly in the parser, so that they don't introduce a new scope. Clang introduces scopes in the dependent case to keep names inside the compound statement from leaking out into the surround statements, which would compromise the template instantiation model. This behavior differs from Visual C++ (which never introduces a scope), but is a fairly reasonable approximation of the VC++ behavior.

Definition at line 240 of file StmtCXX.h.

Constructor & Destructor Documentation

◆ MSDependentExistsStmt()

clang::MSDependentExistsStmt::MSDependentExistsStmt ( SourceLocation  KeywordLoc,
bool  IsIfExists,
NestedNameSpecifierLoc  QualifierLoc,
DeclarationNameInfo  NameInfo,
CompoundStmt SubStmt 
)
inline

Definition at line 251 of file StmtCXX.h.

Member Function Documentation

◆ children()

child_range clang::MSDependentExistsStmt::children ( )
inline

Definition at line 287 of file StmtCXX.h.

◆ classof()

static bool clang::MSDependentExistsStmt::classof ( const Stmt T)
inlinestatic

Definition at line 291 of file StmtCXX.h.

References clang::Stmt::getStmtClass().

◆ getKeywordLoc()

SourceLocation clang::MSDependentExistsStmt::getKeywordLoc ( ) const
inline

Retrieve the location of the __if_exists or __if_not_exists keyword.

Definition at line 262 of file StmtCXX.h.

◆ getLocEnd()

SourceLocation clang::MSDependentExistsStmt::getLocEnd ( ) const
inline

Definition at line 285 of file StmtCXX.h.

References clang::Stmt::getLocEnd().

◆ getLocStart()

SourceLocation clang::MSDependentExistsStmt::getLocStart ( ) const
inline

Definition at line 284 of file StmtCXX.h.

◆ getNameInfo()

DeclarationNameInfo clang::MSDependentExistsStmt::getNameInfo ( ) const
inline

Retrieve the name of the entity we're testing for, along with location information.

Definition at line 276 of file StmtCXX.h.

◆ getQualifierLoc()

NestedNameSpecifierLoc clang::MSDependentExistsStmt::getQualifierLoc ( ) const
inline

Retrieve the nested-name-specifier that qualifies this name, if any.

Definition at line 272 of file StmtCXX.h.

◆ getSubStmt()

CompoundStmt* clang::MSDependentExistsStmt::getSubStmt ( ) const
inline

Retrieve the compound statement that will be included in the program only if the existence of the symbol matches the initial keyword.

Definition at line 280 of file StmtCXX.h.

◆ isIfExists()

bool clang::MSDependentExistsStmt::isIfExists ( ) const
inline

Determine whether this is an __if_exists statement.

Definition at line 265 of file StmtCXX.h.

◆ isIfNotExists()

bool clang::MSDependentExistsStmt::isIfNotExists ( ) const
inline

Determine whether this is an __if_exists statement.

Definition at line 268 of file StmtCXX.h.

Friends And Related Function Documentation

◆ ASTReader

friend class ASTReader
friend

Definition at line 247 of file StmtCXX.h.

◆ ASTStmtReader

friend class ASTStmtReader
friend

Definition at line 248 of file StmtCXX.h.


The documentation for this class was generated from the following file: