Renamed internal variables of StmtIteratorBase to make the code

slightly more succinct.

Introduced VariableArrayType* within StmtIteratorBase to (soon)
support iteration over the size expressions of variable length arrays.

llvm-svn: 43455

clang/AST/StmtIterator.cpp

@@ -30,12 +30,12 @@ static inline bool declHasExpr(ScopedDecl *decl) {
 }
 
 void StmtIteratorBase::NextDecl() {
-  assert (FirstDecl && Ptr.D);
+  assert (FirstDecl && decl);
 
-  do Ptr.D = Ptr.D->getNextDeclarator();
-  while (Ptr.D != NULL && !declHasExpr(Ptr.D));
+  do decl = decl->getNextDeclarator();
+  while (decl != NULL && !declHasExpr(decl));
   
-  if (Ptr.D == NULL) FirstDecl = NULL;
+  if (decl == NULL) FirstDecl = NULL;
 }
 
 StmtIteratorBase::StmtIteratorBase(ScopedDecl* d) {
@@ -45,12 +45,12 @@ StmtIteratorBase::StmtIteratorBase(ScopedDecl* d) {
     d = d->getNextDeclarator();
   
   FirstDecl = d;
-  Ptr.D = d;
+  decl = d;
 }
 
 void StmtIteratorBase::PrevDecl() {
   assert (FirstDecl);
-  assert (Ptr.D != FirstDecl);
+  assert (decl != FirstDecl);
   
   // March through the list of decls until we find the decl just before
   // the one we currently point 
@@ -58,7 +58,7 @@ void StmtIteratorBase::PrevDecl() {
   ScopedDecl* d = FirstDecl;
   ScopedDecl* lastVD = d;
   
-  while (d->getNextDeclarator() != Ptr.D) {
+  while (d->getNextDeclarator() != decl) {
     if (VarDecl* V = dyn_cast<VarDecl>(d))
       if (V->getInit())
         lastVD = d;
@@ -66,14 +66,14 @@ void StmtIteratorBase::PrevDecl() {
     d = d->getNextDeclarator();
   }
   
-  Ptr.D = lastVD;
+  decl = lastVD;
 }
 
 Stmt*& StmtIteratorBase::GetDeclExpr() const {
-  if (VarDecl* D = dyn_cast<VarDecl>(Ptr.D))
+  if (VarDecl* D = dyn_cast<VarDecl>(decl))
     return reinterpret_cast<Stmt*&>(D->Init);
   else {
-    EnumConstantDecl* Decl = cast<EnumConstantDecl>(Ptr.D);
+    EnumConstantDecl* Decl = cast<EnumConstantDecl>(decl);
     return reinterpret_cast<Stmt*&>(Decl->Init);
   }
 }

clang/include/clang/AST/StmtIterator.h

@@ -20,19 +20,21 @@ namespace clang {
 
 class Stmt;
 class ScopedDecl;
-
+class VariableArrayType;
+  
 class StmtIteratorBase {
 protected:
-  union { Stmt** S; ScopedDecl* D; } Ptr;
+  union { Stmt** stmt; ScopedDecl* decl; };
   ScopedDecl* FirstDecl;
+  VariableArrayType* vat;
   
   void NextDecl();
   void PrevDecl();
   Stmt*& GetDeclExpr() const;
 
-  StmtIteratorBase(Stmt** s) : FirstDecl(NULL) { Ptr.S = s; }
+  StmtIteratorBase(Stmt** s) : stmt(s), FirstDecl(NULL), vat(NULL) {}
   StmtIteratorBase(ScopedDecl* d);
-  StmtIteratorBase() : FirstDecl(NULL) { Ptr.S = NULL; }
+  StmtIteratorBase() : stmt(NULL), FirstDecl(NULL), vat(NULL) {}
 };
   
   
@@ -51,7 +53,7 @@ public:
   
   DERIVED& operator++() { 
     if (FirstDecl) NextDecl();
-    else ++Ptr.S;
+    else ++stmt;
       
     return static_cast<DERIVED&>(*this);
   }
@@ -64,7 +66,7 @@ public:
   
   DERIVED& operator--() {
     if (FirstDecl) PrevDecl();
-    else --Ptr.S;
+    else --stmt;
     
     return static_cast<DERIVED&>(*this);
   }
@@ -76,15 +78,15 @@ public:
   }
 
   bool operator==(const DERIVED& RHS) const {
-    return FirstDecl == RHS.FirstDecl && Ptr.S == RHS.Ptr.S;
+    return FirstDecl == RHS.FirstDecl && stmt == RHS.stmt;
   }
   
   bool operator!=(const DERIVED& RHS) const {
-    return FirstDecl != RHS.FirstDecl || Ptr.S != RHS.Ptr.S;
+    return FirstDecl != RHS.FirstDecl || stmt != RHS.stmt;
   }
   
   REFERENCE operator*() const { 
-    return (REFERENCE) (FirstDecl ? GetDeclExpr() : *Ptr.S);
+    return (REFERENCE) (FirstDecl ? GetDeclExpr() : *stmt);
   }
   
   REFERENCE operator->() const { return operator*(); }