Merge pull request #852 from filipsch/master

execute embedded R script in specified env

Author: eddelbuettel

R/Attributes.R

@@ -196,7 +196,7 @@ sourceCpp <- function(file = "",
     if (embeddedR && (length(context$embeddedR) > 0)) {
         srcConn <- textConnection(context$embeddedR)
         setwd(rWorkingDir) # will be reset by previous on.exit handler
-        source(file=srcConn, echo=TRUE)
+        source(file = srcConn, local = env, echo = TRUE)
     }
 
     # cleanup the cache dir if requested

inst/unitTests/cpp/embeddedR.cpp

@@ -0,0 +1,33 @@
+// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
+//
+// Environment.cpp: Rcpp R/C++ interface class library -- Environment unit tests
+//
+// Copyright (C) 2018 Dirk Eddelbuettel and Romain Francois
+//
+// This file is part of Rcpp.
+//
+// Rcpp is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// Rcpp is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Rcpp.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <Rcpp.h>
+using namespace Rcpp ;
+
+// [[Rcpp::export]]
+int foo(){
+    return 42 ;
+}
+
+/*** R
+x <- foo()
+x
+*/

inst/unitTests/cpp/embeddedR2.cpp

@@ -0,0 +1,33 @@
+// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
+//
+// Environment.cpp: Rcpp R/C++ interface class library -- Environment unit tests
+//
+// Copyright (C) 2018 Dirk Eddelbuettel and Romain Francois
+//
+// This file is part of Rcpp.
+//
+// Rcpp is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// Rcpp is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Rcpp.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <Rcpp.h>
+using namespace Rcpp ;
+
+// [[Rcpp::export]]
+int bar(){
+    return 42 ;
+}
+
+/*** R
+x <- foo()
+x
+*/

inst/unitTests/runit.embeddedR.R

@@ -0,0 +1,40 @@
+#!/usr/bin/env r
+# -*- mode: R; ess-indent-level: 4; tab-width: 4; indent-tabs-mode: nil; -*
+#
+# Copyright (C) 2012 - 2016  Dirk Eddelbuettel and Romain Francois
+#
+# This file is part of Rcpp.
+#
+# Rcpp is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# Rcpp is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Rcpp.  If not, see <http://www.gnu.org/licenses/>.
+
+.runThisTest <- Sys.getenv("RunAllRcppTests") == "yes"
+
+if (.runThisTest) {
+
+    test.embeddedR <- function() {
+        path <- file.path(system.file("unitTests", package = "Rcpp"), "cpp")
+        expectedVars <- c("foo", "x")
+
+        # embeddedR.cpp exposes the function foo, R snippet calls foo
+        newEnv <- new.env()
+        Rcpp::sourceCpp(file.path(path, "embeddedR.cpp"),
+                        env = newEnv)
+        checkEquals(ls(newEnv), expectedVars, msg = " sourcing code in custom env")
+
+        # R snippet in embeddedR2.cpp also contains a call to foo from previous cpp
+        newEnv2 <- new.env()
+        checkException(Rcpp::sourceCpp(file.path(path, "embeddedR2.cpp"), env = newEnv2),
+                                       " not available in other env")
+    }
+}