diff options
Diffstat (limited to 'libbuild2/scope.hxx')
| -rw-r--r-- | libbuild2/scope.hxx | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/libbuild2/scope.hxx b/libbuild2/scope.hxx index ece78b7..d792ed2 100644 --- a/libbuild2/scope.hxx +++ b/libbuild2/scope.hxx @@ -459,14 +459,20 @@ namespace build2 // when an action is executed on the dir{} target that corresponds to this // scope. The pre callback is called just before the recipe and the post // -- immediately after. The callbacks are only called if the recipe - // (including noop recipe) is executed for the corresponding target. The - // callbacks should only be registered during the load phase. + // (including noop recipe) is executed for the corresponding target. + // + // The callback should only be registered during the load phase. Note that + // it's registered for the inner action, meaning that it will be called + // for any outer action (which is discernible from the first argument of + // the callback). // // It only makes sense for callbacks to return target_state changed or // unchanged and to throw failed in case of an error. These pre/post // states will be merged with the recipe state and become the target // state. See execute_recipe() for details. // + // See also context::operation_callback. + // public: struct operation_callback { |