This issue is for discussion of proposal [2018-001 (Addition of monomorphic buffers)](https://github.com/SMLFamily/BasisLibrary/wiki/2018-001-Addition-of-monomorphic-buffers). Note that this proposal is a generalization of the earlier [proposal 2015-004](https://github.com/SMLFamily/BasisLibrary/wiki/2015-004-Addition-of-Buffer-module).