what exactly does -v1 do?

[torhu]

Tyler Knott wrote:
> Lars Ivar Igesund wrote:
>> Language features added to DMD after release 1.000 will not work when using
>> that switch. 
>> 
> Except they do work?  This compiles on DMD 1.007 with -v1 (as the only flag) without error:
> 
> void main() { mixin(`int foo;`); } //mixin declarations are definitely post-1.0

I suppose it's only for features that break backward compatibility.  It 
enables implicit conversion from objects to void pointers.  That's all I 
know that it does as of 1.007.

If you need older (pre 'D spec 1') features to work, -d will enable some 
of them.  Implicit conversion from arrays to pointers comes to mind.