Compose this grammar fragment g with the common grammar fragments to make a complete grammar, and return a parser for that complete grammar.

Grammar rules used both in the rule grammar and in the flow grammar

Parse this rule-text, a string conforming to the grammar of MicroWorld rules, into Clojure source, and then compile it into an anonymous function object, getting round the problem of binding mw-engine.utils in the compiling environment. If return-tuple? is present and true, return a list comprising the anonymous function compiled, and the function from which it was compiled.

Throws an exception if parsing fails.

English language keyword literals used in rules - both in production rules (this namespace) and in flow rules (see mw-parser.flow).

It’s a long term aim that the rule language should be easy to internationalise; this isn’t a full solution but it’s a step towards a solution.

For now, just return keywords-en; plan is to have resource files of keywords for different languages in a resource directory, but that isn’t done yet. It’s probably not going to work easily for languages that use non-latin alphabets, anyway.

Parse the argument, assumed to be a string in the correct syntax, and return a parse tree.

Basic rule language grammar.

in order to simplify translation into other natural languages, all TOKENS within the parser should be unambiguou.