[jira] Commented: (BOO-496) Allow for compact statements for block-based expressions

    [ http://jira.codehaus.org/browse/BOO-496?page=comments#action_47175 ] 

Doug Holton commented on BOO-496:
---------------------------------

If this is ever wanted, changing the compound_stmt rule in boo.g to this 
appears to allow it:

protected
compound_stmt[Block b]
{
        StatementCollection statements = b.Statements;
}:
                (COLON (EOS)* stmt[statements]) |
                (
                        COLON begin:INDENT
                        {
                                b.LexicalInfo = ToLexicalInfo(begin);
                        }
                                block[statements]
                        end[b]
                )
                ;


Some simple examples:

if true: print "ok"

if false: print "true"
else: print "false"

try: raise "uh oh"
except e: print "caught it"


> Allow for compact statements for block-based expressions
> --------------------------------------------------------
>
>          Key: BOO-496
>          URL: http://jira.codehaus.org/browse/BOO-496
>      Project: Boo
>         Type: Improvement
>   Components: Compiler
>     Versions: 0.6
>     Reporter: Arron Washington
>     Priority: Minor
>      Fix For: 0.7

>
>
> Some discussion on the list - the tail end of this thread: 
> http://groups.google.com/group/boolang/browse_frm/thread/ac20f7172255287e/99ea344d11fe6bc6#99ea344d11fe6bc6
>  - brings up something in general that I think a lot of people might like:
> while true: print 'var'; print 'hello'
> or, as mentioned in the thread,
> if false: print 'empty codeblock'
> Sometimes its not really necessary to consume that much space if there's only 
> going to be one or two elements within the block. Othertimes its just easier 
> to expand a statement like that into a fully block-based statement with a 
> little hassle.
> Note: this is not a proposal to remove the "print 'foo' if bar" syntax; this 
> is just a more general way of allowing compacted block-based 
> statements/expressions/technical jargon.

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
   http://jira.codehaus.org/secure/Administrators.jspa
-
For more information on JIRA, see:
   http://www.atlassian.com/software/jira