Setup and Running

Parse really simple datalog programs

    A(x, y) :- B(c, d)
    A(x, y) :- B(c, d), A(e, f)
    A(x, y) :- B(c, d), c > 1
    A(x, y) :- B(c, d), c * d > 1
    A(x, y) :- B(c, d), c + 1 > 1, d < 1
    A(x, sum(y)) :- B(c, d)

Files

• pegs/datalog.pegjs is the grammar file for the language. Running pegjs ./pegs/datalog.pegjs will generate a javascript parser file as ./pegs/sql.js
• src/ast.coffee defines the AST nodes for the language. It's a rough subset of SQL and interaction statements.

Getting started

• install stuff

    npm install .
    cp node_modules/pegjs/bin/pegjs .
    pip install fabric

• fab commands

    fab -l

• compile parser

    fab peg

• compile modules

    fab coffee

• run a test in ./tests/

    fab parser