Re: [Vala] Why the temporary variables in the C code are usefull ?

[Jacques-Pascal Deplaix <jp deplaix gmail com>]

On 07/07/2011 07:09 PM, Jim Peters wrote:
> Unwanted side effects can happen if you evaluate an expression more
> than once, e.g. if you substituted the full expression for every
> _tmp2_ in the C code.  Expressions with side-effects include function
> calls and stuff which modifies variables, e.g. p++.  You don't want to
> do 'p++' twice or call the function twice.
>
> As the other poster said, C compilers are very good at optimising away
> temporary variables.
>
> Jim
Thanks.
I give a clearer example of what you're saying:

y = x++ + --x;

The result depends of compiler.