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-rw-r--r--paludis/dep_spec.hh21
1 files changed, 21 insertions, 0 deletions
diff --git a/paludis/dep_spec.hh b/paludis/dep_spec.hh
index 9f8254345..3fc076af1 100644
--- a/paludis/dep_spec.hh
+++ b/paludis/dep_spec.hh
@@ -170,6 +170,27 @@ namespace paludis
};
/**
+ * Represents a ?? ( first second third ) group of requirements.
+ *
+ * \ingroup g_dep_spec
+ * \nosubgrouping
+ * \since 0.56
+ */
+ class PALUDIS_VISIBLE AtMostOneDepSpec :
+ public DepSpec
+ {
+ public:
+ ///\name Basic operations
+ ///\{
+
+ AtMostOneDepSpec();
+
+ ///\}
+
+ virtual std::shared_ptr<DepSpec> clone() const PALUDIS_ATTRIBUTE((warn_unused_result));
+ };
+
+ /**
* Represents a dependency spec whose children should only be considered
* upon a certain condition (for example, a use dependency block).
*