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GOTO replacement statements

php.internals

Tim Gales

20 years ago

I was wondering if it would be worthwhile to consider
replacing the functionality of a 'goto' statement with
two or maybe three statements.

'break_to' 'advance_to' and maybe even 'change_state_to'

while($foo1) as LABEL1 {
....
while($foo2) {
...
if($var1)
break;
if($var2)
break_to LABEL1;
...
if($var3)
advance_to LABEL2;
...
..
}

LABEL2:

'break_to' might make it easier for someone who
has to review/maintain the code to spot it as
a 'goto' replacement to break out of a nested loop.

'advance_to' would hopefully cut down on the number
of bug reports claiming that 'jump' doesn't work
properly (when trying to go backwards)



Regards,

Tim Gales

Stanislav Malyshev

20 years ago

TG>>replacing the functionality of a 'goto' statement with
TG>>two or maybe three statements.
TG>>
TG>>'break_to' 'advance_to' and maybe even 'change_state_to'

And maybe even to
please_change_current_executing_opcode_number_to_the_opcode_that_corresponds_to_label
after all, we don't want to have any place for misunderstaning and we
definitely don't want to be rude... If we want to limit it to
forward-jump, we might add also
_but_only_if_it_does_not_mean_jumping_backwards. Then nobody would say it
is not intuitive, at least.

--
Stanislav Malyshev, Zend Products Engineer
stas@zend.com  http://www.zend.com/ +972-3-6139665 ext.115