Switch and break

[Derek]

On Fri, 20 Jan 2012 08:55:06 +1100, RenatoL <rexlen at gmail.com> wrote:

> Just curious: why in D we are not obligated to use break in every
> branch of a swicth structure?

a) C/C++ compatibility
b) Walter likes this construct and uses it in his code.

I use a language that enables the coder to choose to use fall through or  
not. By default, falling through is disabled, so to produce the D effect  
one can code ...

  	switch i with fallthru do
  		case 1 then
  		writeln("You wrote 1")
  		case 2 then
  		writeln("You wrote 2")
  		case 3 then
  		writeln("You wrote 3")
  		else case then
  		writeln("I said: 1 or 2 or 3!")
         end switch

or alternatively ...

  	switch i do
  		case 1 then
  		writeln("You wrote 1")
  	 fallthru
  		case 2 then
  		writeln("You wrote 2")
  	 fallthru
  		case 3 then
  		writeln("You wrote 3")
  	 fallthru
  		else case then
  		writeln("I said: 1 or 2 or 3!")
         end switch


-- 
Derek Parnell
Melbourne, Australia