Error meaning please...

[Brian Alvarez]

 What does this error mean?

Code: [Select]

ERROR: index expression complexity [..]

[Brian Alvarez]

This is the code:

Code: [Select]

function which_index(string p1, int p2) as int
    return 5 ' just as an example
end function

string fff[10]

fff[which_index("something", 5)] = "Hello fff"

[JRS]

Interesting. I have neve tried using a function to reference an array index before.

I'm going to give it a try in SB for fun.

[Brian Alvarez]

Apparently it cannot be done. I will try different methods, maybe a combination of macros and functions will work.
I got it working for some numeric values, but for strings it crashes.

[Brian Alvarez]

Apparently i dont know how to pass an array of strings. And i cant find any examples to do it...

[JRS]

SB seems to handle it okay.

Code: Script BASIC

1. FUNCTION ECHO(in)
2.   ECHO = in
3. END FUNCTION
4.  
5. array[0] = 100
6. array[1] = "A String"
7. array[2] = .2
8.  
9. PRINT array[ECHO(0)],"\n"
10. PRINT array[ECHO(1)],"\n"
11. PRINT FORMAT("%g",array[ECHO(2)]),"\n"
12.  

jrs@jrs-laptop:~/sb/examples/test$ scriba funcidx.sb
100
A String
0.2
jrs@jrs-laptop:~/sb/examples/test$

[Brian Alvarez]

I am using Oxygen.

[JRS]

I'm going to give it a try in SB for fun.

I didn't have to guess you were using O2.

[Brian Alvarez]

 Oh, ok.

 Have fun John.

 Meanwhile, I'm getting frustrated here.
No workarounds in sight!! Im getting worried.

 I think im going to rest now. Maybe when i come
back i will see one of the magical solutions from Charles.

[JRS]

Apparently i dont know how to pass an array of strings. And i cant find any examples to do it...

Code: Script BASIC

1. FUNCTION ECHO(my_array)
2.   PRINT my_array[0],"\n"
3.   PRINT my_array[1],"\n"
4.   PRINT FORMAT("%g", my_array[2]),"\n"
5. END FUNCTION
6.  
7. array[0] = 100
8. array[1] = "A String"
9. array[2] = .2
10.  
11. ECHO array
12.  

jrs@jrs-laptop:~/sb/examples/test$ scriba passarray.sb
100
A String
0.2
jrs@jrs-laptop:~/sb/examples/test$

[Charles Pegge]

Hi Brian.

One would normally split the computation of an index, and its use in an array, into 2 separate expressions. This is what a compiler has to do anyway. And the code is easier to understand when you come to revise it.

But I might be able to persuade o2 to accept this kind of nesting, without complaining about 'complexity'.

[Brian Alvarez]

Please do! I was thinking of doing it myself, but i rather focus on writing the rest of the stock functions.

[JRS]

With O2, array references need the null [] brackets. I also wish Charles would have gone with the variant TYPE for variables.

[Charles Pegge]

Brian,

Passing whole string arrays byref:

Code: [Select]

'[]' indicates whole array passed byref
'
'function f(byref s as string [])
'function f(byref s as string ptr)
'function f(s as string ptr)
function f(s as string [])
'function f(string s[])
======================
print s[1] s[2] s[3] s[4]
s[3]="c"
end function

f(s)
print s[1] s[2] s[3] s[4]