Sha256: 6c52ad76acaf965d20d157b864fc712fca75d3a84dc1665614898ee835c62bf8
Contents?: true
Size: 1.51 KB
Versions: 10
Compression:
Stored size: 1.51 KB
Contents
# = RWDelegator
#
# WARNING Highly expiremental code!
#
# Read from one object and write to another.
#
# == Authors
#
# * Thomas Sawyer
#
# == Copying
#
# Copyright (c) 2005 Thomas Sawyer
#
# Ruby License
#
# This module is free software. You may use, modify, and/or redistribute this
# software under the same terms as Ruby.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.
# = RWDelegator
#
# WARNING Highly expiremental code!
#
# Read from one object and write to another.
#
class RWDelegator
def initialize( write, &read )
@read = read
@write = write
# ensure other classes can deduce equality.
read_class = @read.call.object_class
unless read_class.method_defined?(:eq_with_rwdelegator?)
read_class.class_eval %{
def eq_with_rwdelegator?( other )
if RWDelegator === other
other == self
else
eq_without_rwdelegator?(other)
end
end
alias_method :eq_without_rwdelegator?, :==
alias_method :==, :eq_with_rwdelegator?
}
end
end
def inspect
"#<#{object_class} #{@read.call.inspect}>"
end
def ==( other )
@read.call == other
end
def method_missing( meth, *args, &blk )
read = @read.call
ditto = read.dup
result = ditto.send( meth, *args, &blk )
if ditto != read
result = @write.send( meth, *args, &blk )
end
result
end
end
Version data entries
10 entries across 10 versions & 2 rubygems