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-rw-r--r--libbuild2/parser.hxx4
1 files changed, 4 insertions, 0 deletions
diff --git a/libbuild2/parser.hxx b/libbuild2/parser.hxx
index 185216b..a71d671 100644
--- a/libbuild2/parser.hxx
+++ b/libbuild2/parser.hxx
@@ -553,6 +553,10 @@ namespace build2
// example, $($x ? X : Y)) it will be empty (along with qual, which can
// only be non-empty for a computed variable).
//
+ // Note also that this function is (currently) not called by some lookup-
+ // like functions ($defined(), $config.origin()). But we should be careful
+ // if/when extending this and audit all the existing use-cases.
+ //
virtual lookup
lookup_variable (name&& qual, string&& name, const location&);