Interesting user mistake

[Jonathan M Davis via Digitalmars-d]

On Thursday, 3 September 2015 at 18:31:59 UTC, Meta wrote:
> On Thursday, 3 September 2015 at 17:12:31 UTC, H. S. Teoh wrote:
>> Is there a way for the lexer to check for the specific 
>> character sequence '=', '+', whitespace and not others (e.g. 
>> '=', whitespace, '+')?  IOW, "a =+ b" will be prohibited, but 
>> "a = + b" will be allowed. If so, I agree with this.
>>
>> On that note, though, the unary + operator is totally useless 
>> in D... maybe we should get rid of that instead?  (Then "=+" 
>> will automatically be an error.)
>>
>>
>> T
>
> Worse than useless; it doesn't even behave as you would expect.
>
> import std.stdio;
>
> void main()
> {
> 	auto a = -1;
> 	writeln(+a); //Prints -1
>         writeln(-a); //Prints  1
> }
>
> At least unary - does something.

I didn't realize that a unary + operator existed. I would have 
assumed that +a as an expression would be illegal. It doesn't 
even mean anything.

- Jonathan M Davis