clang  3.9.0
Classes | Public Member Functions | List of all members
clang::sema::FunctionScopeInfo::WeakObjectProfileTy Class Reference

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

#include <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 NamedDeclgetBase () const
 
const NamedDeclgetProperty () 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. More...
 
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 199 of file ScopeInfo.h.

Constructor & Destructor Documentation

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy ( const ObjCPropertyRefExpr RE)
FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy ( const Expr Base,
const ObjCPropertyDecl Property 
)

Definition at line 136 of file ScopeInfo.cpp.

References clang::Property.

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy ( const DeclRefExpr RE)

Definition at line 144 of file ScopeInfo.cpp.

References clang::Property.

FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy ( const ObjCIvarRefExpr RE)

Definition at line 150 of file ScopeInfo.cpp.

References clang::Property.

Member Function Documentation

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

Definition at line 227 of file ScopeInfo.h.

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

Definition at line 228 of file ScopeInfo.h.

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 241 of file ScopeInfo.h.

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

Definition at line 245 of file ScopeInfo.h.


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