On Sunday, 18 March 2018 at 22:57:15 UTC, aliak wrote:
// But you get a:// Error: Using the result of a comma expression is not allowed// writeln(mixin(arguments!f));
You can't mix part of a function call in: "Mixed in text must form complete declarations, statements, or expressions." (https://dlang.org/articles/mixin.html)
In this case, it evaluates to a comma expression, which is deprecated. If you put the "writeln();" inside the mixin string it should form a complete statement and compile.