Re: [ANN] Lua 5.2.0 (beta-rc1) now available

[Dirk Laurie <dpl@...>]

On Tue, Jun 14, 2011 at 03:05:24PM +0200, Jerome Vuarand wrote:
> 2011/6/13 Roberto Ierusalimschy <roberto@inf.puc-rio.br>:
> >> Why break can appear middle of block but not return?
> >
> > Because return may be followed by an optional expression. Something
> > like 'return a       = 3' would confuse the parser.
> 
> But then shouldn't "return; a = 3" be allowed ?
> 
When?

if test then return end; a=3        -- OK
if test then return else a=3 end    -- OK
if test then return; a=3 end        -- what's this supposed to mean?
function x() print "gotcha!" return; a=3 end  -- never reaches a=3

IMHO there is no situation in which "return; a = 3"
can be milked into making sense.

Dirk