72 lines
2.1 KiB
Ruby
72 lines
2.1 KiB
Ruby
# encoding: utf-8
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module CodeRay
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module Scanners
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class Ruby
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class StringState < Struct.new :type, :interpreted, :delim, :heredoc,
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:opening_paren, :paren_depth, :pattern, :next_state # :nodoc: all
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CLOSING_PAREN = Hash[ *%w[
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( )
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[ ]
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< >
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{ }
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] ].each { |k,v| k.freeze; v.freeze } # debug, if I try to change it with <<
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STRING_PATTERN = Hash.new do |h, k|
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delim, interpreted = *k
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# delim = delim.dup # workaround for old Ruby
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delim_pattern = Regexp.escape(delim)
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if closing_paren = CLOSING_PAREN[delim]
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delim_pattern << Regexp.escape(closing_paren)
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end
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delim_pattern << '\\\\' unless delim == '\\'
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# special_escapes =
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# case interpreted
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# when :regexp_symbols
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# '| [|?*+(){}\[\].^$]'
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# end
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h[k] =
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if interpreted && delim != '#'
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/ (?= [#{delim_pattern}] | \# [{$@] ) /mx
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else
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/ (?= [#{delim_pattern}] ) /mx
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end
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end
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def initialize kind, interpreted, delim, heredoc = false
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if heredoc
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pattern = heredoc_pattern delim, interpreted, heredoc == :indented
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delim = nil
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else
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pattern = STRING_PATTERN[ [delim, interpreted] ]
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if closing_paren = CLOSING_PAREN[delim]
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opening_paren = delim
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delim = closing_paren
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paren_depth = 1
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end
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end
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super kind, interpreted, delim, heredoc, opening_paren, paren_depth, pattern, :initial
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end
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def heredoc_pattern delim, interpreted, indented
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# delim = delim.dup # workaround for old Ruby
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delim_pattern = Regexp.escape(delim)
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delim_pattern = / (?:\A|\n) #{ '(?>[ \t]*)' if indented } #{ Regexp.new delim_pattern } $ /x
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if interpreted
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/ (?= #{delim_pattern}() | \\ | \# [{$@] ) /mx # $1 set == end of heredoc
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else
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/ (?= #{delim_pattern}() | \\ ) /mx
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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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end
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