OpenEuphoria

Re: Do you currently use namespaces?

• Posted by Jeremy Cowgar <jeremy at c?wgar.com> May 26, 2008
• 1032 views

Matt Lewis wrote:
> 
> ken mortenson wrote:
> > 
> > Jeremy Cowgar wrote:
> > > [SNIP include example]
> > > ---- This is proper coding.
> > 
> > Ah, Jeremy, this is a grand statement.  Especially when demonstrating the
> > 'include everything' school of programming.  I see this same problem in 
> > Microsoft programmers which is why they have a zillion constants for the
> > definition of true and false (all with very precise names) in their code.
> > 
> > Including fileA and fileB twice is only a little bit of nails on the 
> > chalkboard for me, but I can get past that because the language allows it.
> 
> It's not a matter of including it twice.  His point was that your code should
> include what it needs.  Your statement is actually the antithesis of modular
> programming, IMHO.  Each module should explicitly declare its dependencies.
> Euphoria has never required this, though it will at least generate a 
> warning in 4.0.
> 

In addition, if you use namespaces, you can forget the fact 100% that anything
is global throughout the entire program. For instance:

FileA.e. FileB.e, FileC.e, FileD.e, ...., FileAA.e, ...., FileZZZZZZZ.e

global function hello()

MyProg.ex

include FileA.e as a
include FileB.e as b
...
include FileZZZZZZZ.e as zzzzzzz

a:hello()
b:hello()
aaa:hello()
zzzzzzzzzz:hello()

In side of the namespace, the *only* functions/procedures/variables are those
within the file defining the namespace. It does not matter if there are 1,000
hello() functions. In side your declared namespace there is only 1. That's the
same as a module:

-- Fake Language FileA.fake
module FileA

export sub hello() { ... }
sub goodbye() { ... }

-- Fake Language FileB.fake
module FileB

export sub hello() { ... }
sub goodbye() { ... }

-- Fake Language MyProg.fake
use FileA
use FileB

FileA.hello()
FileB.hello()

--
Jeremy Cowgar
http://jeremy.cowgar.com