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