OpenEuphoria

Re: Phix loop variables and scope

• Posted by _tom (admin) May 25, 2018
• 1096 views

Both languages say the same thing.

• 'x' is defined in the first line
• at the "top-level" you can not use 'x' in another definition (a loop variable is another definition of x)

The error messages compared:

• _OE simply says you have used 'x' already

• Phix says because 'x' is already used, you better get a namespace qualifier if you try to define it in two places

So, the Phix wording is just an indirect way of showing you the same error.

integer x = 0 
 
for x = 2 to 7 do 
    ? x 
end for 
 
? x 
 
/* 

OE 
 
<0031>:: attempt to redefine x. 
for x = 2 to 7 do 
                ^ 
*/ 
 
 
/* 

PHIX 
 
    ? x 
      ^ a namespace qualifier is required 
x is defined in: 
    /media/oe/ORIGINAL/forum/loop variable/t01.ex, 
    /media/oe/ORIGINAL/forum/loop variable/t01.ex. 
*/ 

Both languages are ornary (stubbornly obstructive and unwilling to cooperate) about namespace use:

namespace mine 
 
integer mine:x 
 
/* 

OE error 
 
<0025>:: found ... variable ... but was expecting an identifier name 
integer mine:x 
             ^ 
*/ 
 
 
 
/* 

PHIX error 
 
integer mine:x 
             ^ namespace qualifier not specific enough 
x is defined in: 
*/ 
 
 
x = 0 
 
? x 
 
x += 1 
 
? mine:x 

_tom