Rcpp Version 0.12.12
WeakReference.h
Go to the documentation of this file.
1 // -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
2 //
3 // WeakReference.h: Rcpp R/C++ interface class library -- weak references
4 //
5 // Copyright (C) 2009 - 2013 Dirk Eddelbuettel and Romain Francois
6 //
7 // This file is part of Rcpp.
8 //
9 // Rcpp is free software: you can redistribute it and/or modify it
10 // under the terms of the GNU General Public License as published by
11 // the Free Software Foundation, either version 2 of the License, or
12 // (at your option) any later version.
13 //
14 // Rcpp is distributed in the hope that it will be useful, but
15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
18 //
19 // You should have received a copy of the GNU General Public License
20 // along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
21 
22 #ifndef Rcpp_WeakReference_h
23 #define Rcpp_WeakReference_h
24 
25 namespace Rcpp{
26 
27  RCPP_API_CLASS(WeakReference_Impl) {
28  public:
29  RCPP_GENERATE_CTOR_ASSIGN(WeakReference_Impl)
30 
31  WeakReference_Impl(){}
32 
40  WeakReference_Impl( SEXP x){
41  if( TYPEOF(x) != WEAKREFSXP )
42  throw not_compatible( "not a weak reference" ) ;
43  Storage::set__(x);
44  }
45 
49  SEXP key() const {
50  return R_WeakRefKey(Storage::get__()) ;
51  }
52 
56  SEXP value() const {
57  return R_WeakRefValue(Storage::get__());
58  }
59 
60  void update(SEXP){}
61 
62  } ;
63 
64  typedef WeakReference_Impl<PreserveStorage> WeakReference ;
65 }
66 
67 #endif
#define RCPP_GENERATE_CTOR_ASSIGN(__CLASS__)
Definition: interface.h:21
WeakReference_Impl< PreserveStorage > WeakReference
Definition: WeakReference.h:62
RCPP_API_CLASS(DottedPair_Impl)
Rcpp API.
Definition: algo.h:28
void update(SEXP)
Definition: Environment.h:400