Functions cannot be interpreted while being compiled

[ketmar via Digitalmars-d]

On Thursday, 25 August 2016 at 02:20:31 UTC, Andrei Alexandrescu 
wrote:
> Just got the error above. Is this fundamental or an 
> implementation artifact? -- Andrei

fundamental. interpreter operates only on fully semanticed 
functions, where all the analysis, type inferencing and lowering 
is already complete (otherwise interpreter have to reimplement 
*all* the frontend again, to do exactly same work).

the error mesage you got means that CTFE tried to execute 
something that is still in semantic analysis stage.

this *may* be somewhat relaxed by doing lazy semantic (i.e. only 
mark something for "future analysis", and do real thing when 
interpreter/compiler really need semantic results), but it will 
require a huge efforts to implement this in current FE 
architecture.

still, this may be some obscure bug in semantic analyser, so it 
will be good to see a minified sample that triggers this.