OpenEuphoria: Forum: Re: Syntax for OR

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DerekParnell said...

cp said...

It seems that this syntax is supported ?

if seqConn[1] = 1 or 3 then

and is equivalent to..

if seqConn[1] = 1 or seqConn[1] = 3 then

casey

As said by others, this type of shortcut is not supported. The operator precedence rules means that in the absence of parenthesis,

if seqConn[1] = 1 or 3 then

and is really equivalent to..

if (seqConn[1] = 1) or (3) then

or to use really longhand ...

if (seqConn[1] = 1) then 
   ... 
elsif (3) then 
   ...   
end if

But the problem is that those two code segments are not equivalent!

if (seqConn[1] = 1) or (3) then

will always be true but

if (seqConn[1] = 1) then 
   ... -- path A 
elsif (3) then 
   ... -- path B  
end if

will only execute path A if seqConn[1] = 1 and will execute path B in all other cases.

Lonny

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