64 lines
1.2 KiB
Ruby
64 lines
1.2 KiB
Ruby
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# frozen_string_literal: true
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require "strscan"
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module ActionDispatch
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module Journey # :nodoc:
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class Scanner # :nodoc:
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def initialize
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@ss = nil
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end
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def scan_setup(str)
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@ss = StringScanner.new(str)
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end
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def eos?
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@ss.eos?
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end
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def pos
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@ss.pos
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end
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def pre_match
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@ss.pre_match
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end
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def next_token
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return if @ss.eos?
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until token = scan || @ss.eos?; end
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token
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end
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private
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def scan
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case
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# /
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when @ss.skip(/\//)
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[:SLASH, "/"]
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when @ss.skip(/\(/)
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[:LPAREN, "("]
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when @ss.skip(/\)/)
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[:RPAREN, ")"]
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when @ss.skip(/\|/)
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[:OR, "|"]
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when @ss.skip(/\./)
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[:DOT, "."]
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when text = @ss.scan(/:\w+/)
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[:SYMBOL, text]
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when text = @ss.scan(/\*\w+/)
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[:STAR, text]
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when text = @ss.scan(/(?:[\w%\-~!$&'*+,;=@]|\\[:()])+/)
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text.tr! "\\", ""
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[:LITERAL, text]
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# any char
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when text = @ss.scan(/./)
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[:LITERAL, text]
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end
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end
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end
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end
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end
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