auto

[BCS]

Ary Manzana wrote:
 > Derek Parnell escribió:
 >
 >> On Wed, 20 Jun 2007 14:20:43 +0200, Hoenir wrote:
 >>
 >>> I still can't get the purpose of "auto".
 >>> I know it makes it possible to e.g. write "auto y = 4u;" but why not
 >>> just "uint y = 4;"?
 >>
 >>
 >>    auto y = someFunc();   // What type is it now?
 >>
 >>
 >
 > // What can you do with y now, if you don't know the type?

whatever you want

auto z = y * 2;
auto x = z*y;
return x + y + z;

With a little care and a working knowledge of the typing rules of 
expressions you can get a lot done without ever using a actual type.

This is of a lot of use if you are doing template code where you really 
can't known the type until compile time.