number ~ sign_maybe digit_many e
| sign_maybe digit_any '.' digit_many e_maybe
| sign_maybe digit_many e_maybe
| sign_maybe non_zero digit_any
empty ~
sign_maybe ~ [+-] | empty
digit ~ [0-9]
non_zero ~ [1-9]
digit_any ~ digit*
digit_many ~ digit+
e ~ [Ee] sign_maybe digit_many
e_maybe ~ e | empty
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]