tree 4b376c3dca5fa029dc106bf910977403a96d0c05
parent 79101d29ecb6be99ad3dc66ae7d66573e55f9c80
author Peter Kelly <peter@uxproductivity.com> 1439052803 +0700
committer Peter Kelly <peter@uxproductivity.com> 1439052803 +0700

Flat: Support parsing using custom grammars

Add the ability to use the flat command-line tool to specify both a
grammar file and an input which should be parsed using that grammar.
After a successful parse, the parse tree is printed to standard output.

This is what makes Flat a parser *interpreter*, rather than a parser
*generator*. There is no need for the an intermediate step of compiling
generated files as with many other parsing tools like Bison/Flex, ANTLR,
JavaCC, or Stratego/XT. We can (and probably will) choose to add code
generation as an optional feature later on, but it's not a fundamental
requirement.