Move ASTLocation and DeclReferenceMap from the AST library to the Index library.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74859 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Index/DeclReferenceMap.cpp b/lib/Index/DeclReferenceMap.cpp
new file mode 100644
index 0000000..841d7fb
--- /dev/null
+++ b/lib/Index/DeclReferenceMap.cpp
@@ -0,0 +1,132 @@
+//===--- DeclReferenceMap.cpp - 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/Index/DeclReferenceMap.h"
+#include "clang/Index/ASTLocation.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/Stmt.h"
+#include "clang/AST/DeclVisitor.h"
+#include "clang/AST/StmtVisitor.h"
+#include "llvm/Support/Compiler.h"
+using namespace clang;
+using namespace idx;
+
+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);
+}