From the documentation:

"If an auto Identifier is provided, it is declared and initialized to the value and type of the Expression. Its scope extends from when it is initialized to the end of the ThenStatement.

If a Declarator is provided, it is declared and initialized to the value of the Expression. Its scope extends from when it is initialized to the end of the ThenStatement. "

I can't understand what Declerator is.. I thought it would assign a previously defined variable, but that's not the case.

 if (auto r = true) {
  writefln(r); // OK
 }

 bool r;
 if (r = true) { // Error: '=' does not give a boolean result
  writefln(r);
 }


So... What is it then?

Simen Haugen wrote:
> From the documentation:
> 
> "If an auto Identifier is provided, it is declared and initialized to the value and type of the Expression. Its scope extends from when it is initialized to the end of the ThenStatement.
> 
> If a Declarator is provided, it is declared and initialized to the value of the Expression. Its scope extends from when it is initialized to the end of the ThenStatement. "
> 
> I can't understand what Declerator is.. I thought it would assign a previously defined variable, but that's not the case.
> 
>  if (auto r = true) {
>   writefln(r); // OK
>  }
> 
>  bool r;
>  if (r = true) { // Error: '=' does not give a boolean result
>   writefln(r);
>  }
> 
> 
> So... What is it then?

This is a guess, but it compiles so...

if (bool r = true) {
  writefln(r);
}

A declarator would be where you declare a variable, not re-assign.  I guess.

Regan

"Simen Haugen" <simen@norstat.no> wrote in message news:ffi0d1$vjp$1@digitalmars.com...
> From the documentation:
>
> "If an auto Identifier is provided, it is declared and initialized to the value and type of the Expression. Its scope extends from when it is initialized to the end of the ThenStatement.
>
> If a Declarator is provided, it is declared and initialized to the value of the Expression. Its scope extends from when it is initialized to the end of the ThenStatement. "
>
> I can't understand what Declerator is.. I thought it would assign a previously defined variable, but that's not the case.
>
> if (auto r = true) {
>  writefln(r); // OK
> }
>
> bool r;
> if (r = true) { // Error: '=' does not give a boolean result
>  writefln(r);
> }
>
>
> So... What is it then?
>
>

The spec for Declarators is given in the Declarations section of the spec. Yes, it's basically a variable declaration.  Hence the name.