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This was awesome and yet one more reason to learn Idris. Now I have to see if it can be done in Scala.
The format string semantics are actually pretty tricky because printf will perform conversions in certain cases.
My mind immediately went to Star Citizen...
Why?
This was awesome and yet one more reason to learn Idris. Now I have to see if it can be done in Scala.
It can, with macros. Though Scala's stri g interpolation will get you mostly there (correct number of arguments, local format specifiers that are harder to mess up).
F#'s standard printf-family functions are all type-safe in exactly the same way. This requires special support by the compiler, though, as F#'s type system is not as powerful. Most of the plumbing is standard, but the conversion from string literal to PrintfFormat at compile time is only possible due to hardcoded magic. You can't get exactly the same effect from plain user code, though you could certainly get something very close using a Type Provider (the syntax would just be a bit clunkier).
Very cool, Idris looks like a really interesting language. F#'s standard printf-family functions are all type-safe in exactly the same way. This requires special support by the compiler, though, as F#'s type system is not as powerful. Most of the plumbing is standard, but the conversion from string literal to PrintfFormat at compile time is only possible due to hardcoded magic. You can't get exactly the same effect f…
http://blog.mavnn.co.uk/type-safe-printf-via-type-providers/
And yes: syntax is not quite so nice.