LANGLVL(INLINENAMESPACE) compiler option (C++11)

This option controls whether the inline namespace definitions are enabled. A namespace definition preceded by an initial inline keyword is defined as an inline namespace. When LANG(INLINENAMESPACE) is in effect, members of the inline namespace can be defined and specialized as if they were also members of the enclosing namespace. The default is LANG(NOINLINENAMESPACE). For detailed information, see INLINENAMESPACE | NOINLINENAMESPACE that is documented in z/OS XL C/C++ User's Guide.