Sha256: 1d756b86d6c59f4e86ab704e7d9472f73d730279866364157c980e5385a95931
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Size: 1.48 KB
Versions: 7
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Stored size: 1.48 KB
Contents
module Sourcify
module Proc
module Scanner #:nodoc:all
class DString < Struct.new(:tag)
# To suppress 'warning: Object#type is deprecated; use Object#class' when
# evaluating string
attr_reader :type
def <<(content)
(@contents ||= []) << content
end
def to_s
@contents.join
end
def closed?
# NOTE: The only real error is SyntaxError, other errors are due
# to undefined variable or watever, which are perfectly ok when
# testing for validity of the string.
begin
instance_eval(safe_contents) if evaluable?
rescue SyntaxError
false
rescue Exception
true
end
end
private
CLOSING_TAGS = {'(' => ')', '[' => ']', '<' => '>', '{' => '}'}
def evaluable?
@contents[-1][-1].chr == end_tag
end
def safe_contents
# NOTE: %x & ` strings are dangerous to eval cos they execute shell commands,
# thus we convert them to normal strings 1st
@contents.join.gsub(/(%x)(\W|\_)/, '%Q\2').gsub(/.{0,2}(`)/) do |s|
s =~ /^(%Q|%W|%r|%x|.?%|.?\\)/ ? s : s.sub(/`$/,'%Q`')
end
end
def start_tag
@start_tag ||= tag[-1].chr
end
def end_tag
@end_tag ||= (CLOSING_TAGS[start_tag] || start_tag)
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems