cpp11 dynlib

.Rbuildignore

@@ -24,3 +24,4 @@
 ^internal$
 ^revdep-cloud$
 ^CRAN-SUBMISSION$
+^\.vscode$

.vscode/settings.json

@@ -0,0 +1,59 @@
+{
+  "C_Cpp_Runner.cCompilerPath": "gcc",
+  "C_Cpp_Runner.cppCompilerPath": "g++",
+  "C_Cpp_Runner.debuggerPath": "gdb",
+  "C_Cpp_Runner.cStandard": "",
+  "C_Cpp_Runner.cppStandard": "",
+  "C_Cpp_Runner.msvcBatchPath": "",
+  "C_Cpp_Runner.useMsvc": false,
+  "C_Cpp_Runner.warnings": [
+    "-Wall",
+    "-Wextra",
+    "-Wpedantic",
+    "-Wshadow",
+    "-Wformat=2",
+    "-Wcast-align",
+    "-Wconversion",
+    "-Wsign-conversion",
+    "-Wnull-dereference"
+  ],
+  "C_Cpp_Runner.msvcWarnings": [
+    "/W4",
+    "/permissive-",
+    "/w14242",
+    "/w14287",
+    "/w14296",
+    "/w14311",
+    "/w14826",
+    "/w44062",
+    "/w44242",
+    "/w14905",
+    "/w14906",
+    "/w14263",
+    "/w44265",
+    "/w14928"
+  ],
+  "C_Cpp_Runner.enableWarnings": true,
+  "C_Cpp_Runner.warningsAsError": false,
+  "C_Cpp_Runner.compilerArgs": [],
+  "C_Cpp_Runner.linkerArgs": [],
+  "C_Cpp_Runner.includePaths": [],
+  "C_Cpp_Runner.includeSearch": [
+    "*",
+    "**/*"
+  ],
+  "C_Cpp_Runner.excludeSearch": [
+    "**/build",
+    "**/build/**",
+    "**/.*",
+    "**/.*/**",
+    "**/.vscode",
+    "**/.vscode/**"
+  ],
+  "C_Cpp_Runner.useAddressSanitizer": false,
+  "C_Cpp_Runner.useUndefinedSanitizer": false,
+  "C_Cpp_Runner.useLeakSanitizer": false,
+  "C_Cpp_Runner.showCompilationTime": false,
+  "C_Cpp_Runner.useLinkTimeOptimization": false,
+  "C_Cpp_Runner.msvcSecureNoWarnings": false
+}

NEWS.md

@@ -5,6 +5,10 @@
 * Implicit usage of `numeric_version()` via comparison now always provides
   character input. This is in response to a request from CRAN to anticipate
   future solutions to <https://bugs.r-project.org/show_bug.cgi?id=18548>.
+* `use_cpp11()` creates/edits DESCRIPTION and NAMESPACE, allowing to use C++
+  code directly.
+* `.gitignore` now ignores `.vscode` for those who contribute to `usethis` from
+  that editor.
 
 # usethis 2.2.1
 

R/cpp11.R

@@ -24,6 +24,8 @@ use_cpp11 <- function() {
 
   check_cpp_register_deps()
 
+  check_cpp_dynlib()
+
   invisible()
 }
 
@@ -40,3 +42,16 @@ check_cpp_register_deps <- function() {
     ui_todo("Now install {ui_value(cpp_register_deps[!installed])} to use cpp11.")
   }
 }
+
+get_cpp_dynlib <- function() {
+  desc <- desc::desc(package = NULL)
+  desc$get_list("Package")[[1]]
+}
+
+check_cpp_dynlib <- function() {
+  pkgname <- get_cpp_dynlib()
+  roxygen_ns_append(
+    sprintf("@useDynLib %s, .registration = TRUE", pkgname)
+  )
+  roxygen_update_ns()
+}

tests/testthat/test-cpp11.R

@@ -21,6 +21,9 @@ test_that("use_cpp11() creates files/dirs, edits DESCRIPTION and .gitignore", {
 
   ignores <- read_utf8(proj_path("src", ".gitignore"))
   expect_true(all(c("*.o", "*.so", "*.dll") %in% ignores))
+
+  namespace <- read_utf8(proj_path("NAMESPACE"))
+  expect_true("# Generated by roxygen2: do not edit by hand" %in% namespace)
 })
 
 test_that("check_cpp_register_deps is silent if all installed, emits todo if not", {