diff options
Diffstat (limited to 'libbuild2/context.hxx')
| -rw-r--r-- | libbuild2/context.hxx | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libbuild2/context.hxx b/libbuild2/context.hxx index 5cc2115..9083556 100644 --- a/libbuild2/context.hxx +++ b/libbuild2/context.hxx @@ -248,7 +248,12 @@ namespace build2 // "islands" are identified by the load_generation number (0 for the // initial/serial load). It is incremented in case of a phase switch and // can be stored in various "nodes" to verify modifications are only done - // "within the islands". + // "within the islands". Another example of invalidation would be + // insertion of a new scope "under" an existing target thus changing its + // scope hierarchy (and potentially even its base scope). This would be + // bad because we may have made decisions based on the original hierarchy, + // for example, we may have queried a variable which in the new hierarchy + // would "see" a new value from the newly inserted scope. // run_phase phase = run_phase::load; size_t load_generation = 0; |