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//===--- DeclReferenceMap.h - Map Decls to their references -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// DeclReferenceMap creates a mapping from Decls to the ASTLocations that
// reference them.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclReferenceMap.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/ASTLocation.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/StmtVisitor.h"
#include "llvm/Support/Compiler.h"
using namespace clang;
namespace {
class VISIBILITY_HIDDEN StmtMapper : public StmtVisitor<StmtMapper> {
DeclReferenceMap::MapTy ⤅
Decl *Parent;
public:
StmtMapper(DeclReferenceMap::MapTy &map, Decl *parent)
: Map(map), Parent(parent) { }
void VisitDeclStmt(DeclStmt *Node);
void VisitDeclRefExpr(DeclRefExpr *Node);
void VisitStmt(Stmt *Node);
};
class VISIBILITY_HIDDEN DeclMapper : public DeclVisitor<DeclMapper> {
DeclReferenceMap::MapTy ⤅
public:
DeclMapper(DeclReferenceMap::MapTy &map)
: Map(map) { }
void VisitDeclContext(DeclContext *DC);
void VisitVarDecl(VarDecl *D);
void VisitFunctionDecl(FunctionDecl *D);
void VisitBlockDecl(BlockDecl *D);
void VisitDecl(Decl *D);
};
} // anonymous namespace
//===----------------------------------------------------------------------===//
// StmtMapper Implementation
//===----------------------------------------------------------------------===//
void StmtMapper::VisitDeclStmt(DeclStmt *Node) {
DeclMapper Mapper(Map);
for (DeclStmt::decl_iterator
I = Node->decl_begin(), E = Node->decl_end(); I != E; ++I)
Mapper.Visit(*I);
}
void StmtMapper::VisitDeclRefExpr(DeclRefExpr *Node) {
NamedDecl *PrimD = cast<NamedDecl>(Node->getDecl()->getPrimaryDecl());
Map.insert(std::make_pair(PrimD, ASTLocation(Parent, Node)));
}
void StmtMapper::VisitStmt(Stmt *Node) {
for (Stmt::child_iterator
I = Node->child_begin(), E = Node->child_end(); I != E; ++I)
Visit(*I);
}
//===----------------------------------------------------------------------===//
// DeclMapper Implementation
//===----------------------------------------------------------------------===//
void DeclMapper::VisitDeclContext(DeclContext *DC) {
for (DeclContext::decl_iterator
I = DC->decls_begin(), E = DC->decls_end(); I != E; ++I)
Visit(*I);
}
void DeclMapper::VisitFunctionDecl(FunctionDecl *D) {
if (!D->isThisDeclarationADefinition())
return;
StmtMapper(Map, D).Visit(D->getBody());
}
void DeclMapper::VisitBlockDecl(BlockDecl *D) {
StmtMapper(Map, D).Visit(D->getBody());
}
void DeclMapper::VisitVarDecl(VarDecl *D) {
if (Expr *Init = D->getInit())
StmtMapper(Map, D).Visit(Init);
}
void DeclMapper::VisitDecl(Decl *D) {
if (DeclContext *DC = dyn_cast<DeclContext>(D))
VisitDeclContext(DC);
}
//===----------------------------------------------------------------------===//
// DeclReferenceMap Implementation
//===----------------------------------------------------------------------===//
DeclReferenceMap::DeclReferenceMap(ASTContext &Ctx) {
DeclMapper(Map).Visit(Ctx.getTranslationUnitDecl());
}
DeclReferenceMap::astlocation_iterator
DeclReferenceMap::refs_begin(NamedDecl *D) const {
NamedDecl *Prim = cast<NamedDecl>(D->getPrimaryDecl());
return astlocation_iterator(Map.lower_bound(Prim));
}
DeclReferenceMap::astlocation_iterator
DeclReferenceMap::refs_end(NamedDecl *D) const {
NamedDecl *Prim = cast<NamedDecl>(D->getPrimaryDecl());
return astlocation_iterator(Map.upper_bound(Prim));
}
bool DeclReferenceMap::refs_empty(NamedDecl *D) const {
NamedDecl *Prim = cast<NamedDecl>(D->getPrimaryDecl());
return refs_begin(Prim) == refs_end(Prim);
}
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