[schmurgel1983]

how to scripting goto and labels?

sample: dosen't work

if (blabla)
{
    if (blabla)
        goto label
    else
    {
        code
        goto label
    }
    label:
    code
    code
    code
    code
}

sample2: dosen't work

if (blabla)
{
    if (blabla)
        goto label
    else
    {
        code
        goto label
    }
    label: {
    code
    code
    code
    code
    }
}

sample3: dosen't work

if (blabla)
{
    if (blabla)
        goto label
    else
    {
        code
        goto label
    }
    label: (
    code
    code
    code
    code)
}

[ehha]

Sample 1 works, but not as you think.

PHP Code:

    if (bla)
        goto label
    else
    {
        code1
        goto label
    }
    label:
    code2 


So, here's the deal:
- if bla is true, we goto label and execute code 2
- if bla is false, execute code1 then goto label and execute code2

Now, if we change the code to

PHP Code:

    if (bla)
        goto label
    else
    {
        code1
    }
    label:
    code2 


- if bla is true, we goto label and execute code 2
- if bla is false, execute code1 then we exit "else" block and we execute code 2
Same thing, right?

Check this to see how i've tried to use it, i've managed to perfect that plugin by not using goto, i just hope you'll see the use of it in that context.

Basically, you can use goto to jump back or forward some code, preferably many lines.

Moar stuff on goto.

[Exolent[jNr]]

Goto's should only be used if you have no other possible solution.
In this case, you can do it with only if() statements.

Sample 1:

PHP Code:

if (blabla)
{
    if (blabla)
        goto label
    else
    {
        code1
        goto label
    }
    label:
    code2
} 


Should be:

PHP Code:

if (blabla)
{
    if (!blabla)
    {
        code1
    }
    code2
} 


Sample 2:

PHP Code:

if (blabla)
{
    if (blabla)
        goto label
    else
    {
        code1
        goto label
    }
    label: {
    code2
    }
} 


Adding brackets is not the syntax for labels.

[Seta00]

Originally Posted by Exolent[jNr] Goto's should only be used if they cure cancer.

Fixed for you.

[Exolent[jNr]]

Originally Posted by Seta00 Fixed for you.

Really? Because I know that they are considered to be horrible coding, but what's the problem if there is absolutely no other solution (that of course isn't horrid)?

[schmurgel1983]

ah ok i understand thank you both

[Seta00]

Originally Posted by Exolent[jNr] Really? Because I know that they are considered to be horrible coding, but what's the problem if there is absolutely no other solution (that of course isn't horrid)?

There's always another solution.

[rhelgeby]

I can't think of any good reason to use goto. As mentioned, it's always possible with other methods. Also, goto makes it difficult to read program flow.

Maybe the compiler should mark goto as deprecated to force people to avoid (at least one) bad programming habit.