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David Majda 6ce97457bf Fix left recursion detection So far, left recursion detector assumed that left recursion occurs only when the recursive rule is at the very left-hand side of rule's expression: start = start This didn't catch cases like this: start = "a"? start In general, if a rule reference can be reached without consuming any input, it can lead to left recursion. This commit fixes the detector to consider that. Fixes #190.	10 years ago
..
compiler/passes	Fix left recursion detection	10 years ago
parser.spec.js	Specs cleanup: Split specs into unit and API specs	11 years ago

David Majda 6ce97457bf Fix left recursion detection

So far, left recursion detector assumed that left recursion occurs only
when the recursive rule is at the very left-hand side of rule's
expression:

  start = start

This didn't catch cases like this:

  start = "a"? start

In general, if a rule reference can be reached without consuming any
input, it can lead to left recursion. This commit fixes the detector to
consider that.

Fixes #190.

compiler/passes

Fix left recursion detection

parser.spec.js

Specs cleanup: Split specs into unit and API specs