async regexp in javascript

regexp grammar: definition, diagram, BNF

            npx kison -m ll --es -g regexp-grammar.js
        

                npm install regular-expression-engine
            

regexp readme

regexp to be matched:  

start listen to document keyup   stop listen

abzaaz.match(/ /);   g   caseInsensitive   multiline   dotMatchesLineSeparators   sticky   unicode   bfs

parse to console   evaluate to console   js native evaluate to console

  range   lazy   evil   backreference   characterGroup   lookahead   nagativeLookahead   lookbehind   nagativeLookbehind   sticky_tc1   unicode_tc1   unicode_tc2   unicode_tc3   unicode_tc4   unicode_tc5   unicode_tc6   unicode_tc7   bfs   bfs group bug