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//===--- ASTLocation.cpp - A <Decl, Stmt> pair ------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// ASTLocation is Decl or a Stmt and its immediate Decl parent.
//
//===----------------------------------------------------------------------===//
#include "clang/Index/ASTLocation.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprObjC.h"
using namespace clang;
using namespace idx;
static Decl *getDeclFromExpr(Stmt *E) {
if (DeclRefExpr *RefExpr = dyn_cast<DeclRefExpr>(E))
return RefExpr->getDecl();
if (MemberExpr *ME = dyn_cast<MemberExpr>(E))
return ME->getMemberDecl();
if (ObjCIvarRefExpr *RE = dyn_cast<ObjCIvarRefExpr>(E))
return RE->getDecl();
if (CallExpr *CE = dyn_cast<CallExpr>(E))
return getDeclFromExpr(CE->getCallee());
if (CastExpr *CE = dyn_cast<CastExpr>(E))
return getDeclFromExpr(CE->getSubExpr());
return 0;
}
Decl *ASTLocation::getReferencedDecl() {
if (isInvalid())
return 0;
if (isDecl())
return getDecl();
assert(getStmt());
return getDeclFromExpr(getStmt());
}
static bool isContainedInStatement(Stmt *Node, Stmt *Parent) {
assert(Node && Parent && "Passed null Node or Parent");
if (Node == Parent)
return true;
for (Stmt::child_iterator
I = Parent->child_begin(), E = Parent->child_end(); I != E; ++I) {
if (*I)
if (isContainedInStatement(Node, *I))
return true;
}
return false;
}
Decl *ASTLocation::FindImmediateParent(Decl *D, Stmt *Node) {
assert(D && Node && "Passed null Decl or null Stmt");
if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
Expr *Init = VD->getInit();
if (Init == 0)
return 0;
return isContainedInStatement(Node, Init) ? D : 0;
}
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
if (!FD->isThisDeclarationADefinition())
return 0;
for (DeclContext::decl_iterator
I = FD->decls_begin(), E = FD->decls_end(); I != E; ++I) {
Decl *Child = FindImmediateParent(*I, Node);
if (Child)
return Child;
}
assert(FD->getBody() && "If not definition we should have exited already");
return isContainedInStatement(Node, FD->getBody()) ? D : 0;
}
if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
if (!MD->getBody())
return 0;
for (DeclContext::decl_iterator
I = MD->decls_begin(), E = MD->decls_end(); I != E; ++I) {
Decl *Child = FindImmediateParent(*I, Node);
if (Child)
return Child;
}
assert(MD->getBody() && "If not definition we should have exited already");
return isContainedInStatement(Node, MD->getBody()) ? D : 0;
}
if (BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
for (DeclContext::decl_iterator
I = BD->decls_begin(), E = BD->decls_end(); I != E; ++I) {
Decl *Child = FindImmediateParent(*I, Node);
if (Child)
return Child;
}
assert(BD->getBody() && "BlockDecl without body ?");
return isContainedInStatement(Node, BD->getBody()) ? D : 0;
}
return 0;
}
bool ASTLocation::isImmediateParent(Decl *D, Stmt *Node) {
assert(D && Node && "Passed null Decl or null Stmt");
return D == FindImmediateParent(D, Node);
}
SourceRange ASTLocation::getSourceRange() const {
if (isInvalid())
return SourceRange();
return isDecl() ? getDecl()->getSourceRange() : getStmt()->getSourceRange();
}
void ASTLocation::print(llvm::raw_ostream &OS) const {
if (isInvalid()) {
OS << "<< Invalid ASTLocation >>\n";
return;
}
OS << "[Decl: " << getDecl()->getDeclKindName() << " ";
if (const NamedDecl *ND = dyn_cast<NamedDecl>(getDecl()))
OS << ND->getNameAsString();
if (getStmt()) {
ASTContext &Ctx = getDecl()->getASTContext();
OS << " | Stmt: " << getStmt()->getStmtClassName() << " ";
getStmt()->printPretty(OS, Ctx, 0, PrintingPolicy(Ctx.getLangOptions()));
}
OS << "] <";
SourceRange Range = getSourceRange();
SourceManager &SourceMgr = getDecl()->getASTContext().getSourceManager();
Range.getBegin().print(OS, SourceMgr);
OS << ", ";
Range.getEnd().print(OS, SourceMgr);
OS << ">\n";
}
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