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//===--- ASTVisitor.h - Visitor for an ASTContext ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the ASTVisitor interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_INDEX_ASTVISITOR_H
#define LLVM_CLANG_INDEX_ASTVISITOR_H
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/AST/TypeLocVisitor.h"
namespace clang {
namespace idx {
/// \brief Traverses the full AST, both Decls and Stmts.
template<typename ImplClass>
class ASTVisitor : public DeclVisitor<ImplClass>,
public StmtVisitor<ImplClass>,
public TypeLocVisitor<ImplClass> {
public:
ASTVisitor() : CurrentDecl(0) { }
Decl *CurrentDecl;
typedef ASTVisitor<ImplClass> Base;
typedef DeclVisitor<ImplClass> BaseDeclVisitor;
typedef StmtVisitor<ImplClass> BaseStmtVisitor;
typedef TypeLocVisitor<ImplClass> BaseTypeLocVisitor;
using BaseStmtVisitor::Visit;
//===--------------------------------------------------------------------===//
// DeclVisitor
//===--------------------------------------------------------------------===//
void Visit(Decl *D) {
Decl *PrevDecl = CurrentDecl;
CurrentDecl = D;
BaseDeclVisitor::Visit(D);
CurrentDecl = PrevDecl;
}
void VisitDeclaratorDecl(DeclaratorDecl *D) {
BaseDeclVisitor::VisitDeclaratorDecl(D);
if (TypeSourceInfo *TInfo = D->getTypeSourceInfo())
Visit(TInfo->getTypeLoc());
}
void VisitFunctionDecl(FunctionDecl *D) {
BaseDeclVisitor::VisitFunctionDecl(D);
if (D->isThisDeclarationADefinition())
Visit(D->getBody());
}
void VisitObjCMethodDecl(ObjCMethodDecl *D) {
BaseDeclVisitor::VisitObjCMethodDecl(D);
if (D->getBody())
Visit(D->getBody());
}
void VisitBlockDecl(BlockDecl *D) {
BaseDeclVisitor::VisitBlockDecl(D);
Visit(D->getBody());
}
void VisitVarDecl(VarDecl *D) {
BaseDeclVisitor::VisitVarDecl(D);
if (Expr *Init = D->getInit())
Visit(Init);
}
void VisitDecl(Decl *D) {
if (isa<FunctionDecl>(D) || isa<ObjCMethodDecl>(D) || isa<BlockDecl>(D))
return;
if (DeclContext *DC = dyn_cast<DeclContext>(D))
static_cast<ImplClass*>(this)->VisitDeclContext(DC);
}
void VisitDeclContext(DeclContext *DC) {
for (DeclContext::decl_iterator
I = DC->decls_begin(), E = DC->decls_end(); I != E; ++I)
Visit(*I);
}
//===--------------------------------------------------------------------===//
// StmtVisitor
//===--------------------------------------------------------------------===//
void VisitDeclStmt(DeclStmt *Node) {
for (DeclStmt::decl_iterator
I = Node->decl_begin(), E = Node->decl_end(); I != E; ++I)
Visit(*I);
}
void VisitBlockExpr(BlockExpr *Node) {
// The BlockDecl is also visited by 'VisitDeclContext()'. No need to visit it twice.
}
void VisitStmt(Stmt *Node) {
for (Stmt::child_iterator
I = Node->child_begin(), E = Node->child_end(); I != E; ++I)
if (*I)
Visit(*I);
}
//===--------------------------------------------------------------------===//
// TypeLocVisitor
//===--------------------------------------------------------------------===//
void Visit(TypeLoc TL) {
for (; TL; TL = TL.getNextTypeLoc())
BaseTypeLocVisitor::Visit(TL);
}
void VisitArrayLoc(ArrayTypeLoc TL) {
BaseTypeLocVisitor::VisitArrayTypeLoc(TL);
if (TL.getSizeExpr())
Visit(TL.getSizeExpr());
}
void VisitFunctionTypeLoc(FunctionTypeLoc TL) {
BaseTypeLocVisitor::VisitFunctionTypeLoc(TL);
for (unsigned i = 0; i != TL.getNumArgs(); ++i)
Visit(TL.getArg(i));
}
};
} // namespace idx
} // namespace clang
#endif
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