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Contents
module Lucid
module InterfaceRb
# A Ruby Transform holds a Regexp and a Proc, and is created
# by calling <tt>Transform in the <tt>support</tt> ruby files.
# See also RbLucid.
#
# Example:
#
# Transform /^(\d+) lucid tests$/ do |lucid_string|
# lucid_string.to_i
# end
#
class RbTransform
class MissingProc < StandardError
def message
"Transforms must always have a proc with at least one argument"
end
end
def initialize(rb_language, pattern, proc)
raise MissingProc if proc.nil? || proc.arity < 1
@rb_language, @regexp, @proc = rb_language, Regexp.new(pattern), proc
end
def match(arg)
arg ? arg.match(@regexp) : nil
end
def invoke(arg)
if matched = match(arg)
args = matched.captures.empty? ? [arg] : matched.captures
@rb_language.current_domain.lucid_instance_exec(true, @regexp.inspect, *args, &@proc)
end
end
def to_s
convert_captures(strip_anchors(@regexp.source))
end
private
def convert_captures(regexp_source)
regexp_source.gsub(/(\()(?!\?:)/,'(?:')
end
def strip_captures(regexp_source)
regexp_source.
gsub(/(\()/, '').
gsub(/(\))/, '')
end
def strip_anchors(regexp_source)
regexp_source.
gsub(/(^\^|\$$)/, '')
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems