Update information about need to use modern standards in c++

add test for c++ standards for all platform change macos platform tag on more generic.

test/10_cpp_standards/cibuildwheel_test.py

@@ -0,0 +1,55 @@
+import os
+import sys 
+
+import pytest
+
+import utils
+
+
+def test_cpp11(tmp_path):
+    add_env = {"CIBW_SKIP": "cp27-win*", "CIBW_ENVIRONMENT": "STANDARD=11"}
+    # VC for python 2.7 do not support modern standards
+    if utils.platform == "macos":
+        add_env["MACOSX_DEPLOYMENT_TARGET"] = "10.9"
+    project_dir = os.path.dirname(__file__)
+    # this test checks if c++11 standard is supported.
+
+    actual_wheels = utils.cibuildwheel_run(project_dir, add_env=add_env)
+    expected_wheels = [x for x in utils.expected_wheels('spam', '0.1.0', "10.9") if "cp27-cp27m-win" not in x]
+    assert set(actual_wheels) == set(expected_wheels)
+
+
+def test_cpp14():
+    add_env = {"CIBW_SKIP": "cp27-win* cp35-win*", "CIBW_ENVIRONMENT": "STANDARD=14"}
+    # VC for python 2.7 do not support modern standards
+    # manylinux1 docker image do not support compilers with standards newer than c++11
+    # python 3.4 and 3.5 are compiled with MSVC 10. which not support c++14
+    if utils.platform == "macos":
+        add_env["MACOSX_DEPLOYMENT_TARGET"] = "10.9"
+    project_dir = os.path.dirname(__file__)
+    # this test checks if c++14 standard is supported.
+
+    actual_wheels = utils.cibuildwheel_run(project_dir, add_env=add_env)
+    expected_wheels = [x for x in utils.expected_wheels('spam', '0.1.0', "10.9")
+                       if "cp27-cp27m-win" not in x and "cp35-cp35m-win" not in x]
+    assert set(actual_wheels) == set(expected_wheels)
+
+def test_cpp17():
+    # python 2.7 use `register` keyword which is forbidden in c++17 standard 
+    # manylinux1 docker image do not support compilers with standards newer than c++11
+    # python 3.4 and 3.5 are compiled with MSVC 10. which not support c++17
+    if os.environ.get("APPVEYOR_BUILD_WORKER_IMAGE", "") == "Visual Studio 2015":
+        pytest.skip("Visual Studio 2015 does not support c++17")
+
+    add_env = {"CIBW_SKIP": "cp27-win* cp35-win*", "CIBW_ENVIRONMENT": "STANDARD=17"}
+    if utils.platform == "macos":
+        add_env["MACOSX_DEPLOYMENT_TARGET"] = "10.13"
+
+    project_dir = os.path.dirname(__file__)
+    # this test checks if c++17 standard is supported.
+
+    actual_wheels = utils.cibuildwheel_run(project_dir, add_env=add_env)
+    expected_wheels = [x for x in utils.expected_wheels('spam', '0.1.0', "10.13") 
+                       if "cp27-cp27m-win" not in x and "cp35-cp35m-win" not in x]
+    assert set(actual_wheels) == set(expected_wheels)
+

test/10_cpp_standards/setup.py

@@ -0,0 +1,21 @@
+import os, sys
+from setuptools import setup, Extension
+import platform
+
+standard = os.environ["STANDARD"]
+
+language_standard = "/std:c++" + standard if platform.system() == "Windows" else "-std=c++" + standard
+
+extra_compile_args=[language_standard, "-DSTANDARD=" + standard]
+
+if standard == "17":
+    if platform.system() == "Windows":
+        extra_compile_args.append("/wd5033")
+    else:
+        extra_compile_args.append("-Wno-register")
+
+setup(
+    name="spam",
+    ext_modules=[Extension('spam', sources=['spam.cpp'], language="c++", extra_compile_args=extra_compile_args)],
+    version="0.1.0",
+)

test/10_cpp_standards/spam.cpp

@@ -0,0 +1,62 @@
+#include <Python.h>
+#include <string>
+#if STANDARD == 11
+#include <array>
+#elif STANDARD == 14
+int a = 100'000;
+#elif STANDARD == 17
+#include <utility>
+auto a = std::pair(5.0, false);
+#else
+#error Standard needed
+#endif
+
+#define STR_HELPER(x) #x
+#define STR(x) STR_HELPER(x)
+
+static PyObject *
+spam_system(PyObject *self, PyObject *args)
+{
+    const char *command;
+    int sts;
+
+    if (!PyArg_ParseTuple(args, "s", &command))
+        return NULL;
+    sts = system(command);
+    return PyLong_FromLong(sts);
+}
+
+/* Module initialization */
+
+#if PY_MAJOR_VERSION >= 3
+    #define MOD_INIT(name) PyMODINIT_FUNC PyInit_##name(void)
+    #define MOD_DEF(m, name, doc, methods, module_state_size) \
+        static struct PyModuleDef moduledef = { \
+            PyModuleDef_HEAD_INIT, name, doc, module_state_size, methods, }; \
+        m = PyModule_Create(&moduledef);
+    #define MOD_RETURN(m) return m;
+#else
+    #define MOD_INIT(name) PyMODINIT_FUNC init##name(void)
+    #define MOD_DEF(m, name, doc, methods, module_state_size) \
+        m = Py_InitModule3(name, methods, doc);
+    #define MOD_RETURN(m) return;
+#endif
+
+static PyMethodDef module_methods[] = {
+    {"system", (PyCFunction)spam_system, METH_VARARGS, 
+     "Execute a shell command."},
+    {NULL}  /* Sentinel */
+};
+
+MOD_INIT(spam)
+{
+    PyObject* m;
+
+    MOD_DEF(m, 
+            "spam", 
+            "Example module", 
+            module_methods,
+            -1)
+
+    MOD_RETURN(m)
+}