4 commits

Author	SHA1	Message	Date
Max Brunsfeld	f93f78ef2d	Remove version-pruning criteria based on pushed node count	2017-07-02 23:42:23 -07:00
Max Brunsfeld	eccb3893eb	Prune unneeded stack versions based on a depth criteria	2017-06-30 17:49:09 -07:00
Max Brunsfeld	009d6d1534	Improve heuristics for pruning parse versions based on errors ... * Rewrite the error cost comparison in terms of explicit, discrete conditions. * Allow merging versions have different error costs. * Store the depth of each stack version since the last error. Use this state to prevent incorrect merging. * Sort the stack versions in order of preference and put a hard limit on the version count.	2017-06-29 15:00:20 -07:00
Max Brunsfeld	cefc57fe86	Move error cost comparisons into their own source file	2017-02-19 21:54:06 -08:00