ll1/flexgen/flexer_parser.go

package flexgen

import . "src.eruta.nl/beoran/ll1/common"
import "src.eruta.nl/beoran/ll1/flexer"
import "src.eruta.nl/beoran/ll1/ast"
import . "src.eruta.nl/beoran/ll1/grammar"
import "src.eruta.nl/beoran/ll1/parser"

func MakeFlexerGrammar() *Grammar {
	g := &Grammar{}
	keywordsRef := g.AddRule(Ref("keywordsRef", "keywords"))
	dot := g.AddRule(Term("dot", FlexgenKindDot))
	terminal := g.AddRule(Term("terminal", FlexgenKindTerminal))
	arrow := g.AddRule(Term("arrow", FlexgenKindArrow))
	keyword := g.AddRule(Term("arrow", FlexgenKindKeyword))
	keywords := g.AddRule(Opt("keywords", "", And(keyword, keywordsRef)))
	literalString := g.AddRule(Term("literalString", FlexgenKindLiteralString))
	literalRaw := g.AddRule(Term("literalRaw", FlexgenKindLiteralRaw))
	literalChar := g.AddRule(Term("literalChar", FlexgenKindLiteralChar))
	pattern := g.AddRule(Alt("pattern", "", literalString, literalRaw, literalChar))
	lexeme := g.AddRule(Seq("lexeme", "", terminal, arrow, pattern, keywords, dot))
	lexemes := g.AddRule(Seq("lexemes", "", lexeme, End{}))
	top := g.AddRule(Alt("top", "", lexemes))
	g.Top = top
	return g
}

/* Parser for the flexer lexer .  */
func MakeFlexerParser() *parser.Parser {
	p := &parser.Parser{}
	p.TokenMapper = parser.DefaultMapper{}
	p.Grammar = *MakeFlexerGrammar()
	return p
}