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//===--- tools/extra/clang-rename/USRLocFinder.cpp - Clang rename tool ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief Mehtods for finding all instances of a USR. Our strategy is very
/// simple; we just compare the USR at every relevant AST node with the one
/// provided.
///
//===----------------------------------------------------------------------===//
#include "USRLocFinder.h"
#include "USRFinder.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Index/USRGeneration.h"
#include "llvm/ADT/SmallVector.h"
using namespace llvm;
namespace clang {
namespace rename {
namespace {
// \brief This visitor recursively searches for all instances of a USR in a
// translation unit and stores them for later usage.
class USRLocFindingASTVisitor
: public clang::RecursiveASTVisitor<USRLocFindingASTVisitor> {
public:
explicit USRLocFindingASTVisitor(const std::string USR) : USR(USR) {
}
// Declaration visitors:
bool VisitNamedDecl(const NamedDecl *Decl) {
if (getUSRForDecl(Decl) == USR) {
LocationsFound.push_back(Decl->getLocation());
}
return true;
}
bool VisitVarDecl(clang::VarDecl *Decl) {
clang::QualType Type = Decl->getType();
const clang::RecordDecl *RecordDecl = Type->getPointeeCXXRecordDecl();
if (RecordDecl) {
if (getUSRForDecl(RecordDecl) == USR) {
// The declaration refers to a type that is to be renamed.
LocationsFound.push_back(Decl->getTypeSpecStartLoc());
}
}
return true;
}
bool VisitCXXConstructorDecl(clang::CXXConstructorDecl *ConstructorDecl) {
for (clang::CXXConstructorDecl::init_const_iterator it = ConstructorDecl->init_begin(); it != ConstructorDecl->init_end(); ++it) {
const clang::CXXCtorInitializer* Initializer = *it;
if (const clang::FieldDecl *FieldDecl = Initializer->getAnyMember()) {
if (getUSRForDecl(FieldDecl) == USR) {
// The initializer refers to a field that is to be renamed.
LocationsFound.push_back(Initializer->getSourceLocation());
}
}
}
return true;
}
// Expression visitors:
bool VisitDeclRefExpr(const DeclRefExpr *Expr) {
const auto *Decl = Expr->getFoundDecl();
checkNestedNameSpecifierLoc(Expr->getQualifierLoc());
if (getUSRForDecl(Decl) == USR) {
LocationsFound.push_back(Expr->getLocation());
}
return true;
}
bool VisitMemberExpr(const MemberExpr *Expr) {
const auto *Decl = Expr->getFoundDecl().getDecl();
if (getUSRForDecl(Decl) == USR) {
LocationsFound.push_back(Expr->getMemberLoc());
}
return true;
}
// Non-visitors:
// \brief Returns a list of unique locations. Duplicate or overlapping
// locations are erroneous and should be reported!
const std::vector<clang::SourceLocation> &getLocationsFound() const {
return LocationsFound;
}
private:
// Namespace traversal:
void checkNestedNameSpecifierLoc(NestedNameSpecifierLoc NameLoc) {
while (NameLoc) {
const auto *Decl = NameLoc.getNestedNameSpecifier()->getAsNamespace();
if (Decl && getUSRForDecl(Decl) == USR)
LocationsFound.push_back(NameLoc.getLocalBeginLoc());
NameLoc = NameLoc.getPrefix();
}
}
// All the locations of the USR were found.
const std::string USR;
std::vector<clang::SourceLocation> LocationsFound;
};
} // namespace
std::vector<SourceLocation> getLocationsOfUSR(const std::string USR,
Decl *Decl) {
USRLocFindingASTVisitor visitor(USR);
visitor.TraverseDecl(Decl);
return visitor.getLocationsFound();
}
} // namespace rename
} // namespace clang
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