Grammar Based Definition Of Metaprogramming Systems Program-Transformation.Org: The Program Transformation Wiki Robert Cameron? and Robert Ito?. Grammar-Based Definition of Metaprogramming Systems. ACM Transactions on Programming Languages and Systems Vol. 6, No. 1, January 1984, Pages 20-54. (ACM Digital Library) Summary This paper describes the GRAMPS method for meta-programming. GRAMPS stands for GRAmmar-based MetaProgramming Scheme. The method basically describes how abstract syntax tree? manipulation can be done in a general-purpose programming language. Given an API for analyzing and constructing syntax trees, transformations can be expressed.