Introduce SelectorMap whose purpose is to map selectors to objc methods and message exprs,

inside a particular ASTContext.

llvm-svn: 77541

1 files changed, 85 insertions, 0 deletions

diff --git a/clang/lib/Index/SelectorMap.cpp b/clang/lib/Index/SelectorMap.cpp
new file mode 100644
index 00000000000..325b3711e80
--- /dev/null
+++ b/clang/lib/Index/SelectorMap.cpp
@@ -0,0 +1,85 @@
+//===- SelectorMap.cpp - Maps selectors to methods and messages -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  SelectorMap creates a mapping from selectors to ObjC method declarations
+//  and ObjC message expressions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Index/SelectorMap.h"
+#include "ASTVisitor.h"
+#include "llvm/Support/Compiler.h"
+using namespace clang;
+using namespace idx;
+
+namespace {
+
+class VISIBILITY_HIDDEN SelMapper : public ASTVisitor<SelMapper> {
+  SelectorMap::SelMethMapTy &SelMethMap;
+  SelectorMap::SelRefMapTy &SelRefMap;
+
+public:
+  SelMapper(SelectorMap::SelMethMapTy &MethMap,
+            SelectorMap::SelRefMapTy &RefMap)
+    : SelMethMap(MethMap), SelRefMap(RefMap) { }
+
+  void VisitObjCMethodDecl(ObjCMethodDecl *D);
+  void VisitObjCMessageExpr(ObjCMessageExpr *Node);
+  void VisitObjCSelectorExpr(ObjCSelectorExpr *Node);
+};
+
+} // anonymous namespace
+
+//===----------------------------------------------------------------------===//
+// SelMapper Implementation
+//===----------------------------------------------------------------------===//
+
+void SelMapper::VisitObjCMethodDecl(ObjCMethodDecl *D) {
+  if (D->getCanonicalDecl() == D)
+    SelMethMap.insert(std::make_pair(D->getSelector(), D));
+  Base::VisitObjCMethodDecl(D);
+}
+
+void SelMapper::VisitObjCMessageExpr(ObjCMessageExpr *Node) {
+  ASTLocation ASTLoc(CurrentDecl, Node);
+  SelRefMap.insert(std::make_pair(Node->getSelector(), ASTLoc));
+}
+
+void SelMapper::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
+  ASTLocation ASTLoc(CurrentDecl, Node);
+  SelRefMap.insert(std::make_pair(Node->getSelector(), ASTLoc));
+}
+
+//===----------------------------------------------------------------------===//
+// SelectorMap Implementation
+//===----------------------------------------------------------------------===//
+
+SelectorMap::SelectorMap(ASTContext &Ctx) {
+  SelMapper(SelMethMap, SelRefMap).Visit(Ctx.getTranslationUnitDecl());
+}
+
+SelectorMap::method_iterator
+SelectorMap::methods_begin(Selector Sel) const {
+  return method_iterator(SelMethMap.lower_bound(Sel));
+}
+
+SelectorMap::method_iterator
+SelectorMap::methods_end(Selector Sel) const {
+  return method_iterator(SelMethMap.upper_bound(Sel));
+}
+
+SelectorMap::astlocation_iterator
+SelectorMap::refs_begin(Selector Sel) const {
+  return astlocation_iterator(SelRefMap.lower_bound(Sel));
+}
+
+SelectorMap::astlocation_iterator
+SelectorMap::refs_end(Selector Sel) const {
+  return astlocation_iterator(SelRefMap.upper_bound(Sel));
+}