disable inclusion of modules code with RCPP_NO_MODULES

ChangeLog

@@ -1,3 +1,9 @@
+2019-09-30  Kevin Ushey  <kevinushey@gmail.com>
+
+	* inst/include/Rcpp.h: add RCPP_NO_MODULES
+	* inst/include/Rcpp/api/meat/is.h: Idem
+	* inst/include/Rcpp/api/meat/meat.h: Idem
+
 2019-09-28  Dirk Eddelbuettel  <edd@debian.org>
 
 	* README.md: Add a stackoverflow tag to indicate where to ask questions,

inst/include/Rcpp.h

@@ -63,8 +63,10 @@
 
 #include <Rcpp/Na_Proxy.h>
 
+#ifndef RCPP_NO_MODULES
 #include <Rcpp/Module.h>
 #include <Rcpp/InternalFunction.h>
+#endif
 
 #include <Rcpp/Nullable.h>
 

inst/include/Rcpp/api/meat/is.h

@@ -148,6 +148,8 @@ namespace Rcpp {
         return TYPEOF(x) == REALSXP && Rf_inherits(x, "POSIXt");
     }
 
+#ifndef RCPP_NO_MODULES
+
     inline bool is_module_object_internal(SEXP obj, const char* clazz){
         Environment env(obj);
         SEXP sexp = env.get(".cppclass");
@@ -161,6 +163,8 @@ namespace Rcpp {
         return is_module_object_internal(x, typeid(CLASS).name());
     }
 
+#endif
+
 
   } // namespace internal
 } // namespace Rcpp

inst/include/Rcpp/api/meat/meat.h

@@ -42,6 +42,8 @@
 #include <Rcpp/api/meat/protection.h>
 #include <Rcpp/api/meat/wrap.h>
 
+#ifndef RCPP_NO_MODULES
 #include <Rcpp/api/meat/module/Module.h>
+#endif
 
 #endif