Weird template error message

[NaN]

On Friday, 15 May 2020 at 21:55:16 UTC, Paul Backus wrote:
> On Friday, 15 May 2020 at 21:40:20 UTC, NaN wrote:
>> Stripped down example...
>>
>> module test;
>>
>> import std.traits;
>>
>> auto offsetBy(T,F)(T path, F x, F y)
>> {
>>     alias PathFloat = TemplateArgsOf!T[0];
>>
>>     struct Offseter(Q)
>>     {
>>         Q path;
>>         PathFloat x;
>>         PathFloat y;
>>     }
>>
>>     return Offseter(path, cast(PathFloat) x, cast(PathFloat) 
>> y);
>
> This line is the problem. Template argument deduction does not 
> work for constructors; you have to write `Offsetter!T(...)`.

Ah OK thanks. Not the most helpful error message from the 
compiler lol.