Re: cross scope gotos?

[BrowserUk]

in reply to cross scope gotos?

So what exactly is a "dynamic scope" here?

Basically anywhere in the current program that hasn't been optimised away:

perl -e"sub x{ goto $_[0] } bill: x( 'bill' ) "

perl -e"sub x{ goto $_[0] } bill: x( 'john' ); john: goto bill;"

[LanX]

> Basically anywhere in the current program that hasn't been optimised away:

not that easy!

perl -e'
goto INTO;
print "Start";
for $i (0..9) {
  INTO: print "STOP";
};'
Can't "goto" into the middle of a foreach loop at -e line 4.

You can't jump to a label out of the current or previous frames!

see Re^3: cross scope gotos? and goto

[BrowserUk]

You can't jump to a label out of the current or previous frames!

I think that's (currently) an over statement:

perl -le"goto loop; $x=0; if( $x ){  while(1){ loop: print 'hi' } }"

[LanX]

> I think that's (currently) an over statement:

nope, while has a proper block but not a proper "frame" like foreach or subs.

(I read somewhere that foreach has internally a frame, but no time to search now...)

But the confusion is understandable, that's why I started the thread.