Replace Rcpp dependency with cpp11

.Rbuildignore

@@ -13,3 +13,4 @@
 ^docs$
 ^pkgdown$
 ^CRAN-SUBMISSION$
+^\.vscode$

.gitignore

@@ -5,3 +5,4 @@ NEWS.html
 script.R
 revdep/cloud.noindex
 docs
+.vscode

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: pkgload
 Title: Simulate Package Installation and Attach
-Version: 1.4.0.9000
+Version: 1.4.0.9001
 Authors@R: c(
     person("Hadley", "Wickham", role = "aut"),
     person("Winston", "Chang", role = "aut"),
@@ -20,6 +20,7 @@ Depends:
     R (>= 3.4.0)
 Imports: 
     cli (>= 3.3.0),
+    decor,
     desc,
     fs,
     glue,
@@ -35,7 +36,7 @@ Suggests:
     jsonlite,
     mathjaxr,
     pak,
-    Rcpp,
+    cpp11,
     remotes,
     rstudioapi,
     testthat (>= 3.2.1.1),
@@ -48,3 +49,5 @@ Config/testthat/start-first: dll
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.2
+LinkingTo: 
+    cpp11

NAMESPACE

@@ -34,3 +34,4 @@ export(run_example)
 export(unload)
 export(unregister)
 import(rlang)
+useDynLib(pkgload, .registration = TRUE)

NEWS.md

@@ -7,6 +7,7 @@
 * The generator of `compile_commands.json` is now more reliable in the presence
   of extra whitespace in `make`'s output (#288, @TimTaylor).
 
+* Refactored to use the "cpp11" package for C++ code instead of "Rcpp". (@pachadotdev, #299)
 
 # pkgload 1.4.0
 

R/cpp11.R

@@ -0,0 +1,5 @@
+# Generated by cpp11: do not edit by hand
+
+fun <- function() {
+  invisible(.Call(`_pkgload_fun`))
+}

R/pkgload-package.R

@@ -2,5 +2,6 @@
 "_PACKAGE"
 
 ## usethis namespace: start
+#' @useDynLib pkgload, .registration = TRUE
 ## usethis namespace: end
 NULL

R/side-effects.R

@@ -0,0 +1,3 @@
+side_effect_decor <- function() {
+  decor::parse_cpp_function("void fun() {}")
+}

src/.gitignore

@@ -0,0 +1,3 @@
+*.o
+*.so
+*.dll

src/code.cpp

@@ -0,0 +1,6 @@
+#include <cpp11.hpp>
+using namespace cpp11;
+
+// just for the side effect of registering the function
+[[cpp11::register]]
+void fun() {}

src/cpp11.cpp

@@ -0,0 +1,28 @@
+// Generated by cpp11: do not edit by hand
+// clang-format off
+
+
+#include "cpp11/declarations.hpp"
+#include <R_ext/Visibility.h>
+
+// code.cpp
+void fun();
+extern "C" SEXP _pkgload_fun() {
+  BEGIN_CPP11
+    fun();
+    return R_NilValue;
+  END_CPP11
+}
+
+extern "C" {
+static const R_CallMethodDef CallEntries[] = {
+    {"_pkgload_fun", (DL_FUNC) &_pkgload_fun, 0},
+    {NULL, NULL, 0}
+};
+}
+
+extern "C" attribute_visible void R_init_pkgload(DllInfo* dll){
+  R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
+  R_useDynamicSymbols(dll, FALSE);
+  R_forceSymbols(dll, TRUE);
+}

tests/testthat/test-dll.R

@@ -101,21 +101,21 @@ test_that("Specific functions from DLLs listed in NAMESPACE can be called", {
 })
 
 
-test_that("load_all() can compile and load DLLs linked to Rcpp", {
+test_that("load_all() can compile and load DLLs linked to cpp11", {
 
-  pkgbuild::clean_dll("testDllRcpp")
+  pkgbuild::clean_dll("testDllcpp11")
 
-  load_all("testDllRcpp", reset = TRUE, quiet = TRUE)
+  load_all("testDllcpp11", reset = TRUE, quiet = TRUE)
 
   # Check that it's loaded properly by calling the hello world function
   # which returns a list
-  expect_type(rcpp_hello_world(), "list")
+  expect_type(cpp11_hello_world(), "list")
 
   # Check whether attribute compilation occurred and that exported
   # names are available from load_all
-  expect_true(rcpp_test_attributes())
+  expect_true(cpp11_test_attributes())
 
   # Unload and clean out compiled objects
-  unload("testDllRcpp")
-  pkgbuild::clean_dll("testDllRcpp")
+  unload("testDllcpp11")
+  pkgbuild::clean_dll("testDllcpp11")
 })

tests/testthat/test-side-effect-decor.R

@@ -0,0 +1,3 @@
+test_that("side effect decor", {
+  expect_type(side_effect_decor(), "list")
+})

tests/testthat/testDllcpp11/DESCRIPTION

@@ -0,0 +1,16 @@
+Package: testDllcpp11
+Title: Test package for compiling DLLs that link to cpp11
+License: GPL (>= 3)
+Description: Test package for compiling DLLs that link to cpp11.
+  Just for testing purposes.
+Authors@R: c(
+    person("Hadley", "Wickham", role = c("aut", "cre"),
+      email = "[email protected]"),
+    person("Mauricio", "Vargas Sepulveda", role = "aut")
+  )
+Version: 0.1
+LinkingTo: 
+    cpp11
+Roxygen: list(markdown = TRUE)
+RoxygenNote: 7.3.2
+Encoding: UTF-8

tests/testthat/testDllcpp11/NAMESPACE

@@ -0,0 +1,3 @@
+# Generated by roxygen2: do not edit by hand
+
+useDynLib(testDllcpp11, .registration = TRUE)

tests/testthat/testDllcpp11/R/.gitignore

@@ -0,0 +1 @@
+cpp11.R

tests/testthat/testDllcpp11/R/testDllcpp11-package.R

@@ -0,0 +1,14 @@
+#' @useDynLib testDllcpp11, .registration = TRUE
+"_PACKAGE"
+
+#' Hello World
+#' @export
+cpp11_hello_world <- function() {
+  cpp11_hello_world_()
+}
+
+#' Test Attributes
+#' @export
+cpp11_test_attributes <- function() {
+  cpp11_test_attributes_()
+}

tests/testthat/testDllcpp11/src/.gitignore

@@ -0,0 +1,4 @@
+cpp11.cpp
+*.o
+*.so
+*.dll

tests/testthat/testDllcpp11/src/cpp11_hello_world.cpp

@@ -0,0 +1,14 @@
+#include <cpp11.hpp>
+using namespace cpp11;
+
+[[cpp11::register]] sexp cpp11_hello_world_() {
+  writable::strings x = {"foo", "bar"};
+  writable::doubles y = {0.0, 1.0};
+  writable::list z = {x, y};
+
+  return z;
+}
+
+[[cpp11::register]] bool cpp11_test_attributes_() {
+  return true;
+}