OpenEuphoria

Re: Conditional includes

• Posted by mattlewis (admin) Nov 12, 2010
• 1260 views

You could do something were you require the file to be a particular name, and to be in the same directory as the main file. This directory would be in the include path. So, suppose you require that the user puts their stuff in a file called gtk_custom.e, then you could:

-- funks.e 
-- This file is fixed, non-editable. It cannot 'see' the user-written includes,  
-- but it must access the user-written functions in those includes.  
  
export procedure do_fn(sequence s)  
atom rid = routine_id(s)  
printf(1,"do_fn sez routine_id is: %d\n",{rid})  
--call_func(rid)  
end procedure  
  
-- code here decides which routine will be called.  
-- based on which button pushed, etc.  
  
-- if btn.name = "file_close" then  
do_fn("custom:close") -- as an example  
include gtk_custom.e as custom 
 

Note also that default namespaces (which are declared using namespace foo at the top of a file) are public symbols, meaning that they can be transmitted via indirect includes:

-- a.e 
namespace a_e 
 
procedure foo() 
   ... 
end procedure 
 
-- b.e 
public include a.e 
 
-- c.ex 
include b.e 
 
-- c.ex can see namespace a_e since b.e used public include, and  
-- c.ex includes b.e 
a_e:foo() 

Matt