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      1 //===--- ObjCMethodList.h - A singly linked list of methods -----*- C++ -*-===//
      2 //
      3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4 // See https://llvm.org/LICENSE.txt for license information.
      5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6 //
      7 //===----------------------------------------------------------------------===//
      8 //
      9 // This file defines ObjCMethodList, a singly-linked list of methods.
     10 //
     11 //===----------------------------------------------------------------------===//
     12 
     13 #ifndef LLVM_CLANG_SEMA_OBJCMETHODLIST_H
     14 #define LLVM_CLANG_SEMA_OBJCMETHODLIST_H
     15 
     16 #include "clang/AST/DeclObjC.h"
     17 #include "llvm/ADT/PointerIntPair.h"
     18 
     19 namespace clang {
     20 
     21 class ObjCMethodDecl;
     22 
     23 /// a linked list of methods with the same selector name but different
     24 /// signatures.
     25 struct ObjCMethodList {
     26   // NOTE: If you add any members to this struct, make sure to serialize them.
     27   /// If there is more than one decl with this signature.
     28   llvm::PointerIntPair<ObjCMethodDecl *, 1> MethodAndHasMoreThanOneDecl;
     29   /// The next list object and 2 bits for extra info.
     30   llvm::PointerIntPair<ObjCMethodList *, 2> NextAndExtraBits;
     31 
     32   ObjCMethodList() { }
     33   ObjCMethodList(ObjCMethodDecl *M)
     34       : MethodAndHasMoreThanOneDecl(M, 0) {}
     35   ObjCMethodList(const ObjCMethodList &L)
     36       : MethodAndHasMoreThanOneDecl(L.MethodAndHasMoreThanOneDecl),
     37         NextAndExtraBits(L.NextAndExtraBits) {}
     38 
     39   ObjCMethodList &operator=(const ObjCMethodList &L) {
     40     MethodAndHasMoreThanOneDecl = L.MethodAndHasMoreThanOneDecl;
     41     NextAndExtraBits = L.NextAndExtraBits;
     42     return *this;
     43   }
     44 
     45   ObjCMethodList *getNext() const { return NextAndExtraBits.getPointer(); }
     46   unsigned getBits() const { return NextAndExtraBits.getInt(); }
     47   void setNext(ObjCMethodList *L) { NextAndExtraBits.setPointer(L); }
     48   void setBits(unsigned B) { NextAndExtraBits.setInt(B); }
     49 
     50   ObjCMethodDecl *getMethod() const {
     51     return MethodAndHasMoreThanOneDecl.getPointer();
     52   }
     53   void setMethod(ObjCMethodDecl *M) {
     54     return MethodAndHasMoreThanOneDecl.setPointer(M);
     55   }
     56 
     57   bool hasMoreThanOneDecl() const {
     58     return MethodAndHasMoreThanOneDecl.getInt();
     59   }
     60   void setHasMoreThanOneDecl(bool B) {
     61     return MethodAndHasMoreThanOneDecl.setInt(B);
     62   }
     63 };
     64 
     65 }
     66 
     67 #endif
     68