On 2009-Oct-20, at 8:04 am, Jon Lang wrote:
The above example is of course trivial. A more serious example
might be one based off of a coordinate system:
role point {
has Num $x, Num $y;
method angle() is rw( { $.x = .r * cos($_); $.y = .r *
sin($_) } ) { return atn($.y/$.x
I recently attempted to write a sample mutable role that made use of a
number of lvalue methods, and I had a bear of a time getting it to
work. Could we arrange for a more intuitive option to be available?
For example, allow the programmer to pass a writer code block in
through the rw trait, and
