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# File 'lib/wongi-engine/core_ext.rb', line 7
def attr_predicate *names
names_hash = names.inject( {} ) do |hash, element|
if Hash === element
hash.merge element
else
hash[element] = false
hash
end
end
names_hash.each do |name, def_value|
varname = "@#{name}".to_sym
getname = "#{name}?".to_sym
setname = "#{name}=".to_sym
exclname = "#{name}!".to_sym
noexclname = "no_#{name}!".to_sym
define_method getname do
if instance_variable_defined?( varname )
instance_variable_get( varname )
else
def_value
end
end
define_method setname do |newvalue|
instance_variable_set( varname, newvalue == true )
end
define_method exclname do
instance_variable_set( varname, true )
end
define_method noexclname do
instance_variable_set( varname, false )
end
end
end
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