On Monday, 22 July 2019 at 21:34:18 UTC, solidstate1991 wrote:
It seems that I've to write my own function that searches in the given object's classinfo.interfaces since I couldn't find anything related in Phobos.
Do you mean...? interface I {} class C : I {} void main() { C c1; writeln(is(typeof(c1) : I)); } No need for Phobos, core language: https://dlang.org/spec/expression.html#IsExpression https://dlang.org/spec/declaration.html#Typeof