Grace˜operator for changing order and scope of implicit parameters

Abstract

Implicit parameters and implicit arguments are useful in many programming paradigms including functional and logic programming. Implicit parameter declaration order is inferred from the subroutine parameter usage order in the subroutine body. It means that implicit parameters have limited possibilities to be declared in the same order as programmers want. The parameter ignorance operator # allows changing implicit parameter order, but usage of this operator leads to subroutine declaration syntax similar to the syntax of declaring subroutine parameters explicitly, partially losing syntax benefits gained of implicit parameters. In order to preserve all the benefits of implicit parameter usage and allow programmers to change implicit parameter declaration order and scope in concise way, the Grace˜ operator, which is presented in this document, was invented.