# CMAKE_CXX_COMPILER_IMPORT_STD

Added in version 3.30.

A list of C++ standard levels for which `import std` support exists for the current C++ toolchain. Support for C++<NN> may be detected using a `<NN> IN_LIST CMAKE_CXX_COMPILER_IMPORT_STD` predicate with the `if()` command.

Note

This variable is meaningful only when experimental support for `import std;` has been enabled by the `CMAKE_EXPERIMENTAL_CXX_IMPORT_STD` gate.