const locals, initial values?

[Doug Evans]

Not that this needs to be added any time soon (if ever), but to get the 
thought down on paper, sometimes I wonder about extending the syntax for 
sequence locals to

([(option list)] MODE variable-name [initial-value])

e.g.

(sequence ((INT x 0) ((const) INT y expr))
                 ...
)

Some purists might wish that initial-value had been there from the 
beginning, I'm not sure why I didn't do it that way, but oh well.