Merge pull request #332 from RcppCore/feature/rf_installchar

use Rf_installChar() for R 3.2.0 or newer (closes #331)

Author: jjallaire

ChangeLog

@@ -1,3 +1,8 @@
+2015-07-23  Dirk Eddelbuettel  <edd@debian.org>
+
+        * inst/include/Rcpp/Symbol.h: Use Rf_installChar(x) instead of
+        Rf_install(CHAR(X)) if R 3.2.0 or later is used
+
 2015-07-07  Qiang Kou <qkou@umaikl.iu.edu>
 
         * src/include/Rcpp/String.h: Ensure proper initialization of String

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: Rcpp
 Title: Seamless R and C++ Integration
-Version: 0.11.6.4.2
-Date: 2015-07-21
+Version: 0.11.6.4.3
+Date: 2015-07-23
 Author: Dirk Eddelbuettel, Romain Francois, JJ Allaire, Kevin Ushey, 
  Douglas Bates, and John Chambers
 Maintainer: Dirk Eddelbuettel <edd@debian.org>

inst/NEWS.Rd

@@ -24,6 +24,8 @@
       request 322 and 329 by Qiang Kou)
       \item DataFrame constructors are now a little more careful (via pull
       request 301 by Romain Francois)
+      \item For R 3.2.0 or newer, \code{Rf_installChar()} is used instead of
+  \code{Rf_install(CHAR())}. 
     }
     \item Changes in Rcpp Attributes:
     \itemize{

inst/include/Rcpp/Symbol.h

@@ -2,7 +2,7 @@
 //
 // Symbol.h: Rcpp R/C++ interface class library -- access R environments
 //
-// Copyright (C) 2013 Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2013 - 2015  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -43,13 +43,21 @@ namespace Rcpp{
                 Storage::set__( x ) ;
                 break; /* nothing to do */
             case CHARSXP: {
+		#if R_VERSION >= R_Version(3,2,0)
+                SEXP charSym = Rf_installChar(x);       // R 3.2.0 or later have Rf_installChar
+                #else
                 SEXP charSym = Rf_install(CHAR(x));     // cannot be gc()'ed  once in symbol table
+                #endif
                 Storage::set__( charSym ) ;
                 break ;
             }
             case STRSXP: {
                 /* FIXME: check that there is at least one element */
+		#if R_VERSION >= R_Version(3,2,0)
+                SEXP charSym = Rf_installChar(STRING_ELT(x, 0 ));     // R 3.2.0 or later have Rf_installChar
+                #else
                 SEXP charSym = Rf_install( CHAR(STRING_ELT(x, 0 )) ); // cannot be gc()'ed  once in symbol table
+                #endif
                 Storage::set__( charSym );
                 break ;
             }