Pure functions in D

[bearophile]

Walter:

>There will be no reasonable way for the programmer who expects a function to be pure, to see if it actually is pure. If he does check (which might be arbitrarilly difficult to do) and it is not pure, he has no reasonable way to determine why the compiler thought it was impure.<

Just a little note: those "he" refer to a male programmer. The D language has a small community, so each person is precious, so it's better to not show sexual discrimination, and try to use a more sexual neutral language in public articles/documents.

Bye,
bearophile