Foldable

This smell occurs when the clone is formed not between full definitions of two nonterminals, but when the right hand side of one nonterminal occurs as a subexpression in the right hand side of another nonterminal. Conceptually they are still clones and su er from all known consequences of coupled evolution.

Related smells: Clone Common

Reference

Mats Stijlaart and Vadim Zaytsev. 2017. Towards a taxonomy of grammar smells. In Proceedings of the 10th ACM SIGPLAN International Conference on Software Language Engineering (SLE 2017). ACM, New York, NY, USA, 43-54.