On 6/29/2013 12:18 PM, Ary Borenszweig wrote:
What you are asking is essentially what Crystal does for all variables (and
types):
https://github.com/manastech/crystal/wiki/Introduction#type-inference
Your example would be written like this:
x = 3
y = f()
x = 3.9
But since Crystal transforms your code to SSA
(http://en.wikipedia.org/wiki/Static_single_assignment_form) you actually have
*two* "x" variables in your code. The first one is of type Int32, the second of
type Float64.
Sorry, but that seems like a solution in search of a problem.
And besides, yuk. Imagine the bugs caused by "hey, it doesn't implicitly
convert, so instead of letting the user know he goofed, let's just silently
create a new variable!"
