Hi Volker,
you wrote:
>use and /local have another bug: you can't look in after an error!
I'm not sure how you were trying to "look in":
>> f: func [/local a] [a: 1 1 / 0]
will cause a divide by zero error:
>> f
** Math Error: Attempt to divide by zero.
** Where: 1 / 0
Now let's look at the value of a:
>> first second :f
== a:
>> get first second :f
== 1
"Looked in" and saw that a evaluates to 1. You must mean something quite
different?
>a question: [a: do [print "1"]] does not work, how can i handle this too?
>i wanted to return the result of [do b] this way, with some lines after it
>[.. e: do b if a-option [..] "return" e ] ?
print returns nothing, and nothing is a value of type unset!:
>> type? print "hello"
hello
== unset!
>> type? do [print "hello"]
hello
== unset!
>> print mold do [print "hello"]
hello
** Script Error: mold is missing its value argument.
** Where: print mold do [print "hello"]
When type? returns the datatype unset! it is reporting that there was no
value:
>> type?
== unset!
There is no value to assign to 'a in your example. Otherwise it works as
you expect (?):
>> f: func [] [a: do [1 + 1] return a]
>> f
== 2
>"code"
>local: func[a "vars" b "script" /local c d ][
> c: copy[] foreach i a[ append c to set-word! i] append c none
You could simplify your foreach loop:
foreach i a [
append c compose [(to set-word! i) none]
]
> d: make object! c bind b in d 'self do b d]
>
>"test" do [
>a: "-a" b: "-b"
>probe the-locals: local[a b][ a: 10 b: 20]
>probe a probe b probe the-locals
>]
>
>
>Volker
>
>
>
;- Elan >> [: - )]
