clang::sema::FunctionScopeInfo::WeakObjectProfileTy Class Reference

Represents a simple identification of a weak object. More...

#include "clang/Sema/ScopeInfo.h"

Classes
class	DenseMapInfo

Public Member Functions
	WeakObjectProfileTy (const ObjCPropertyRefExpr *RE)
	WeakObjectProfileTy (const Expr *Base, const ObjCPropertyDecl *Property)
	WeakObjectProfileTy (const DeclRefExpr *RE)
	WeakObjectProfileTy (const ObjCIvarRefExpr *RE)
const NamedDecl *	getBase () const
const NamedDecl *	getProperty () const
bool	isExactProfile () const
	Returns true if the object base specifies a known object in memory, rather than, say, an instance variable or property of another object.
bool	operator== (const WeakObjectProfileTy &Other) const

Detailed Description

Represents a simple identification of a weak object.

Part of the implementation of -Wrepeated-use-of-weak.

This is used to determine if two weak accesses refer to the same object. Here are some examples of how various accesses are "profiled":

Access Expression	"Base" Decl	"Property" Decl
self.property	self (VarDecl)	property (ObjCPropertyDecl)
self.implicitProp	self (VarDecl)	-implicitProp (ObjCMethodDecl)
self->ivar.prop	ivar (ObjCIvarDecl)	prop (ObjCPropertyDecl)
cxxObj.obj.prop	obj (FieldDecl)	prop (ObjCPropertyDecl)
[self foo].prop	0 (unknown)	prop (ObjCPropertyDecl)
self.prop1.prop2	prop1 (ObjCPropertyDecl)	prop2 (ObjCPropertyDecl)
MyClass.prop	MyClass (ObjCInterfaceDecl)	-prop (ObjCMethodDecl)
MyClass.foo.prop	+foo (ObjCMethodDecl)	-prop (ObjCPropertyDecl)
weakVar	0 (known)	weakVar (VarDecl)
self->weakIvar	self (VarDecl)	weakIvar (ObjCIvarDecl)

Objects are identified with only two Decls to make it reasonably fast to compare them.

Definition at line 271 of file ScopeInfo.h.

Constructor & Destructor Documentation

WeakObjectProfileTy() [1/4]

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy

(

const ObjCPropertyRefExpr *

RE

)

Definition at line 118 of file ScopeInfo.cpp.

References getBestPropertyDecl(), clang::if(), clang::ObjCPropertyRefExpr::isClassReceiver(), clang::ObjCPropertyRefExpr::isObjectReceiver(), clang::nullptr, and true.

WeakObjectProfileTy() [2/4]

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy	(	const Expr *	Base,
		const ObjCPropertyDecl *	Property )

Definition at line 133 of file ScopeInfo.cpp.

References clang::nullptr, and true.

WeakObjectProfileTy() [3/4]

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy

(

const DeclRefExpr *

RE

)

Definition at line 141 of file ScopeInfo.cpp.

References clang::isa(), clang::nullptr, and true.

WeakObjectProfileTy() [4/4]

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy

(

const ObjCIvarRefExpr *

RE

)

Definition at line 147 of file ScopeInfo.cpp.

References getBase().

Member Function Documentation

getBase()

const NamedDecl * clang::sema::FunctionScopeInfo::WeakObjectProfileTy::getBase ( ) const

inline

Definition at line 299 of file ScopeInfo.h.

Referenced by WeakObjectProfileTy().

getProperty()

const NamedDecl * clang::sema::FunctionScopeInfo::WeakObjectProfileTy::getProperty ( ) const

inline

Definition at line 300 of file ScopeInfo.h.

isExactProfile()

bool clang::sema::FunctionScopeInfo::WeakObjectProfileTy::isExactProfile ( ) const

inline

Returns true if the object base specifies a known object in memory, rather than, say, an instance variable or property of another object.

Note that this ignores the effects of aliasing; that is, foo.bar is considered an exact profile if foo is a local variable, even if another variable foo2 refers to the same object as foo.

For increased precision, accesses with base variables that are properties or ivars of 'self' (e.g. self.prop1.prop2) are considered to be exact, though this is not true for arbitrary variables (foo.prop1.prop2).

Definition at line 313 of file ScopeInfo.h.

operator==()

bool clang::sema::FunctionScopeInfo::WeakObjectProfileTy::operator== ( const WeakObjectProfileTy & Other ) const

inline

Definition at line 317 of file ScopeInfo.h.

References clang::Other.

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

• include/clang/Sema/ScopeInfo.h
• lib/Sema/ScopeInfo.cpp