OpenEuphoria

1. variable declaration

• Posted by jessedavis Apr 08, 2016
• 1383 views

I'm old & tired and now drawing a blank. Can someone give me a clue? Euphoria Version 4.01

 
include std/console.e 
integer size = 24 
integer start = 3 
if start + 24 > size then 
	integer last = size 
else 
	last = start + 24 
end if 
any_key() 

I can think of no reason why the compiler (token generator) cannot figure out that 4 bytes need be allocated for the variable last. It complains about error 74 (failure to declare last) in lines 6 & 8 (there is a blank line at the start). Since I have never been able to find an error list anywhere in the docs I guess I will have to assume that this is do having the declaration inside the if block. What I find worrying is that this is an artifact of JIT allocation. Any thoughts would help. Like I said, I'm old and brain dead.

Regards & thanks, jd

3. Re: variable declaration

• Posted by unsteady Apr 09, 2016
• 1333 views

You could add "integer" before "last" after the "else", but the compiler may not like it. I usually force a likely result before the conditional "if"

Try

include std/console.e  
integer size = 24  
integer start = 3  
integer last = start + 24  
if start + 24 > size then  
	last = size  
end if  
any_key()  

or

include std/console.e  
integer size = 24  
integer start = 3  
integer last = size  
if start + 24 <= size then  
	last = start + 24  
end if  
any_key()  

5. Re: variable declaration

• Posted by Spock Apr 10, 2016
• 1305 views

And yet, the way you first programmed the if block made sense to you at the time. When they added scopes to Eu I altered the parser of my Orac compiler to obviate them. Maybe it was too long ago when they had the discussion (if at all) about scopes but I can't recall what the supposed benefits of scopes were. I would be interested to see a real-life example of scopes in action that was genuinely superior to the less regimented schema.

Spock