Matthew Dudley:
Also, as an aside, why can't tuples be indexed dynamically? Most of my problems with this have been because you apparently can't.
Think about how D tuples are implemented, they are essentially structs. Every tuple element can have a different type and to be represented in memory with a different number of bytes. D is statically typed so when you read an element of a tuple, you need to know at compile-time the type (and size) of what you are reading. To have tuples indexable at run-time their items need to be all of the same type (so they are essentially arrays), or they need to be some kind of variants (but later you need to manage their type more manually).
Bye, bearophile
