Grackle is a command-line tree-walking interpreter for a limited subset of the Racket dialect of Lisp.

This is a hobby project, with features being added as I figure them out, and have time.

• arbitrarily-nested s-expression arithmetic (on fixed-precision integers)
• variable definition
• list manipulation
• predicate and conditional expressions
• user-defined lambdas and named functions, with lexical scoping
• boolean, integer, string, list, and function types

A fuller list may be found here.

• floating-point arithmetic

Binaries are not currently available. Compilation from source requires make and gcc, but no external libraries.

$ git clone https://github.com/gfetterman/grackle.git
$ cd grackle
$ make

The executable produced is named grackle; it is not installed globally.