On Wed, Aug 17, 2011 at 12:53 PM, A.T.Hofkamp <[email protected]> wrote: > On 17/08/11 12:07, Tarek Ziadé wrote: >> >> On Wed, Jul 27, 2011 at 1:51 PM, Simon Cross<[email protected]> wrote: >>> >>> On Tue, Jul 26, 2011 at 11:04 PM, Tarek Ziadé<[email protected]> >>> wrote: >>>> >>>> I used PLY for an experiment, and I was trying to improve my DSL, in >>>> particular allow trailing commas. >>> >>> I haven't thought about this particularly hard (I just tested simple >>> cases) but does: >>> >>> def p_statements(p): >>> """statements : statements COMMA statement >>> | statements COMMA >>> | statement >>> """ >>> if len(p) == 2: >>> p[0] = [p[1]] >>> elif len(p) == 3: >>> p[0] = p[1] >>> else: >>> p[0] = p[1] + [p[3]] >>> >>> Help? >> >> Yeah that's what I was going to do, but I was wondering if there was a >> generic way to handle this case, because I am going to have to add it >> in many statements. > > You could add an empty statenment, except that would allow "foo,,,"
good idea, I'll try this Thanks > > Albert > > -- > You received this message because you are subscribed to the Google Groups > "ply-hack" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/ply-hack?hl=en. > > -- Tarek Ziadé | http://ziade.org -- You received this message because you are subscribed to the Google Groups "ply-hack" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/ply-hack?hl=en.
