Add C++ standard to CMake for MSVC

.vscode/settings.json

@@ -0,0 +1,10 @@
+{
+    "files.associations": {
+        "*.rst": "restructuredtext",
+        "*.make": "makefile",
+        "opam": "ocaml.opam",
+        "schema.capnp.h": "c",
+        "stdbool.h": "c"
+    },
+    "cmake.configureOnOpen": false
+}

CMakeLists.txt

@@ -9,6 +9,13 @@ project(c-capnproto LANGUAGES ${languages})
 
 include(CTest)
 
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_EXTENSIONS NO)
+if(BUILD_TESTING)
+    set(CMAKE_CXX_STANDARD 20)
+    set(CMAKE_CXX_EXTENSIONS NO)
+endif()
+
 # Stop noise if CXX compiler is set.
 set(ignoreAndAvoidCMakeUnusedWarning "${CMAKE_CXX_COMPILER}")
 

tests/example-test.cpp

@@ -18,7 +18,7 @@
 #include "addressbook.capnp.h"
 
 static capn_text chars_to_text(const char *chars) {
-  return (capn_text) {
+  return {
     .len = (int) strlen(chars),
     .str = chars,
     .seg = NULL,