Features: Add cxx_range_for.

Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst

@@ -82,6 +82,11 @@ The features known to this version of CMake are:
 
   .. _N2928: http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm
 
+``cxx_range_for``
+  Range-based for, as defined in N2930_.
+
+  .. _N2930: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2930.html
+
 ``cxx_static_assert``
   Static assert, as defined in N1720_.
 

Modules/Compiler/GNU-CXX-FeatureTests.cmake

@@ -20,6 +20,7 @@ set(_cmake_feature_test_cxx_override "${GNU47_CXX11}")
 set(GNU46_CXX11 "${_oldestSupported} && __cplusplus >= 201103L")
 set(_cmake_feature_test_cxx_constexpr "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_nullptr "${GNU46_CXX11}")
+set(_cmake_feature_test_cxx_range_for "${GNU46_CXX11}")
 # TODO: Should be supported by GNU 4.5
 set(GNU45_CXX11 "${_oldestSupported} && __cplusplus >= 201103L")
 set(_cmake_feature_test_cxx_explicit_conversions "${GNU45_CXX11}")

Source/cmMakefile.cxx

@@ -56,6 +56,7 @@
   F(cxx_nonstatic_member_init) \
   F(cxx_nullptr) \
   F(cxx_override) \
+  F(cxx_range_for) \
   F(cxx_static_assert) \
   F(cxx_strong_enums) \
   F(cxx_trailing_return_types) \

Tests/CompileFeatures/cxx_range_for.cpp

@@ -0,0 +1,10 @@
+
+void someFunc()
+{
+  int accumulated = 0;
+  int numbers[] = { 1, 2, 5 };
+  for (int i : numbers)
+    {
+    accumulated += i;
+    }
+}