On Sun, 14 Jun 2015 05:11:17 +0000, Maxim Fomin wrote:

> On Sunday, 14 June 2015 at 01:20:39 UTC, Timothee Cour wrote:
>> I understand this is legal for declaration wo definition (void
>> fun(int);)
>> but why allow this:
>> void test(int){} ?
> 
> Actually it is void test(int _param_0) { }
> You can test by compiling void test(int) { _param_0 = 0; }
> 
> Nameless parameters are simulated by providing internal symbol as above.

yet one shouldn't rely on generated names, they are undocumented on purpose, and can change without a notice and deprecation cycle.