DIP 1027---String Interpolation---Format Assessment

[Mike Parker]

DIP 1027, "String Interpolation", has been rejected. The decision 
was primarily influenced by the lack of consensus over the 
implementation and the syntax demonstrated in the two review 
threads. As the DIP author, Walter also rejected the suggestion 
to go with an implementation that resolves to a library template. 
He sees that as equivalent to AST macros, a feature which he has 
previously rejected.

https://github.com/dlang/DIPs/blob/4be15bd40381667c0ab1c0aef360d0daa4b8c82c/DIPs/rejected/DIP1027.md