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Introduce 'DefinedSVal', an intermediate parent class between Loc/NonLoc and 

SVal. This allows us to use the C++ type system to distinguish between SVals
that are potentially unknown/undefined and those that are not.

llvm-svn: 79951
This commit is contained in:
Ted Kremenek 2009-08-24 22:41:15 +00:00
parent f5147c6c02
commit d64be8201d
1 changed files with 17 additions and 6 deletions
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23
clang/include/clang/Analysis/PathSensitive/SVals.h
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@ -172,10 +172,21 @@ public:
void* getData() const { return Data; }
};
class NonLoc : public SVal {
class DefinedSVal : public SVal {
protected:
NonLoc(unsigned SubKind, const void* d) : SVal(d, false, SubKind) {}
DefinedSVal(const void* d, bool isLoc, unsigned ValKind)
: SVal(d, isLoc, ValKind) {}
// Implement isa<T> support.
static inline bool classof(const SVal *V) {
return !V->isUnknownOrUndef();
}
};
class NonLoc : public DefinedSVal {
protected:
NonLoc(unsigned SubKind, const void* d) : DefinedSVal(d, false, SubKind) {}
public:
void dumpToStream(llvm::raw_ostream& Out) const;
@ -186,15 +197,15 @@ public:
}
};
class Loc : public SVal {
class Loc : public DefinedSVal {
protected:
Loc(unsigned SubKind, const void* D)
: SVal(const_cast<void*>(D), true, SubKind) {}
: DefinedSVal(const_cast<void*>(D), true, SubKind) {}
public:
void dumpToStream(llvm::raw_ostream& Out) const;
Loc(const Loc& X) : SVal(X.Data, true, X.getSubKind()) {}
Loc(const Loc& X) : DefinedSVal(X.Data, true, X.getSubKind()) {}
Loc& operator=(const Loc& X) { memcpy(this, &X, sizeof(Loc)); return *this; }
// Implement isa<T> support.