Switch: Case Range Syntax

[bearophile]

Jacob Carlborg:

> D should have a built-in range type. One that supports syntax for both 
> including and excluding the last element:
> 
> auto a = 3 .. 5
> auto b = 3 ... 5
> 
> Then we wouldn't need a special range syntax for switch statements.

Regarding just switches, GCC has a non standard syntax extension that allows you to write case 'a' ... 'z':
http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_5.html#SEC90

But it also says:

> Note: Always write spaces around the ..., for otherwise it may be parsed wrong
> when you use it with integer values. For example, write this:
> case 1 ... 5:
> rather than this:
> case 1...5:

Bye,
bearophile