OpenEuphoria

New switch/case idea

• Posted by Fernando Mar 30, 2009
• 1890 views

Hi switchers ,

Another idea:

Rather than modify 'switch', how about modify 'case' to:

'case' [<case_modifier>] <valuelist> [':' | 'then']

Suppose 'case' without modifier means without fall-through, then we could have a modifier to force fall-through:

For instance, let the keyword continue (to not add a new keyword) represents fall-through, then we could have something like this (based on Jeremy's example):

switch 1 do  
    case 1: ? 1  
    case 2: ? 2  
end switch  
  
-- Output:  
-- 1  

and

switch 1 do  
    case continue 1: ? 1  
    case continue 2: ? 2  
    case 3: ? 3  
    case 4: ? 4  
end switch  
  
-- Output:  
-- 1  
-- 2  
-- 3  

Features:

• It doesn't add a new keyword or word;
• It permits to mix with fall-through and without fall-through cases in the same switch;
• It is easy to implement;

In fact, one <case_modifier> already exists: 'else' (for the default case).

In the future, more <case_modifiers> could be included, for example: 'in', 'range', ...

- Fernando