OpenEuphoria

GOTO

• Posted by Michael Nelson <MichaelANelson at WORLDNET.ATT.NET> Jan 19, 2001
• 621 views

I have an idea for a restricted goto:

1. A label would be allowed only immediately before or immediately after a
loop termination (end for or end while) statement.

2.  A label could be branched to only from within the loop, including nested
loops:

for i=1 to 50 do
     -- some statements
    while 1 do
        -- lots of statements
        if x=1 then goto continue_while end if
        if x=2 then goto continue_for end if
        if x=3 then goto exit_while end if  -- could use exit here
        if x=4 then goto exit_for end if
        -- lots more statements
        continue_while:
    end while
    exit_while:
    -- more statements
    continue_for:
 end for
exit_for:
-- rest of program

This would simplying nested loop coding while virtually eliminating
potential abuse.  Note that only the case where x=3 is now doable without
flag variables, etc.  I believe this is much more readable than flags.

How difficult would this be to implement?

-- Mike Nelson