diff options
Diffstat (limited to 'Help/policy/CMP0124.rst')
| -rw-r--r-- | Help/policy/CMP0124.rst | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/Help/policy/CMP0124.rst b/Help/policy/CMP0124.rst index 88d03e3..3935166 100644 --- a/Help/policy/CMP0124.rst +++ b/Help/policy/CMP0124.rst @@ -3,14 +3,12 @@ CMP0124 .. versionadded:: 3.21 -The loop variables created by :command:`foreach` command have now their scope -restricted to the loop scope. +When this policy is set to ``NEW``, the scope of loop variables defined by the +:command:`foreach` command is restricted to the loop only. They will be unset +at the end of the loop. -Starting with CMake 3.21, the :command:`foreach` command ensures that the loop -variables have their scope restricted to the loop scope. - -The ``OLD`` behavior for this policy let the loop variables to exist, with an -empty value, in the outer scope of loop scope. +The ``OLD`` behavior for this policy still clears the loop variables at the end +of the loop, but does not unset them. This leaves them as defined, but empty. This policy was introduced in CMake version 3.21. Use the :command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly. |