[jsr294-modularity-eg] 294 EG conf call, 2009-04-15

[Alex Buckley]

Bryan Atsatt wrote:
> module M @ 5.0 {
>    requires module "N at 1.0+; optional=true";
>    requires package "P@(1.0,2.0]";
>    permits  module "O";  // Module O is M's friend
>    provides module "M at 4.5+";  // M v5.0 is compatible with 4.5+
>    provides package "m"; // Exports package 'm'
> }

0) Can I suggest that 'requires system ...' is as good as 'system ...' ?

1) Can I suggest putting modifiers like 'optional' first:

   optional requires module  N @ 1.0+;
            requires package P @ (1.0,2.0];

This mirrors class/method/field signatures and allows a simple, flexible 
grammar for the content of a module compilation unit: (Id == identifier)

   Id* ('requires'|'permits'|'provides') Id Id ['@' VStart VPart*] ';'

VStart:
   digit
   '['
   '('

VPart:
   InputCharacter but not FF, Space, Tab, '"', '\'', '\\', ';'
   // InputCharacter is any UnicodeInputCharacter except CR and LF
   // Note it includes comma and dot, allowing version ranges like
   // 1.0,2.0 at the cost of disallowing multiple operands per requires

Alex