41 lines
1.3 KiB
Crystal
41 lines
1.3 KiB
Crystal
require "./lexer.cr"
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require "./parsers.cr"
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module Chalk
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module ParserCombinators
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module ParserBuilder
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def type(type) : BasicParser(Compiler::Token)
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return TypeParser.new(type).as(BasicParser(Compiler::Token))
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end
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def char(type) : BasicParser(Compiler::Token)
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return CharParser.new(type).as(BasicParser(Compiler::Token))
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end
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def transform(parser : BasicParser(T), &transform : T -> R) forall T, R
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return TransformParser.new(parser, &transform).as(BasicParser(R))
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end
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def optional(parser : BasicParser(T)) : BasicParser(T?) forall T
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return OptionalParser.new(parser).as(BasicParser(T?))
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end
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def either(*args : BasicParser(T)) : BasicParser(T) forall T
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return EitherParser.new(args.to_a).as(BasicParser(T))
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end
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def many(parser : BasicParser(T)) : BasicParser(Array(T)) forall T
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return ManyParser.new(parser).as(BasicParser(Array(T)))
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end
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def delimited(parser : BasicParser(T), delimiter : BasicParser(R)) : BasicParser(Array(T)) forall T, R
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return DelimitedParser.new(parser, delimiter).as(BasicParser(Array(T)))
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end
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def then(first : BasicParser(T), second : BasicParser(R)) forall T, R
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return NextParser.new(first, second).as(BasicParser(Array(T | R)))
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end
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end
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end
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end
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