Go does not have pattern matching. There are type assertions, but obviously that's not the same thing.

Go has higher order functions in some sense, and the standard libraries use them for some things. But I wouldn't say they're nearly as ubiquitous as they are in Ruby or your average functional language. My read is that Go is pretty firmly grounded in imperative-land.

Regardless, since Go 1 came out relatively recently, I doubt they're going to make substantial changes to the language anytime soon. Obvs I don't speak for them, etc etc.

I'm sure that Go has higher-order functions, I just mean that Rust encourages you to use higher-order functions all the time. For example: in Rust, `for` loops desugar to higher-order functions (it's very neat, actually). Furthermore, whereas in Go you spawn a goroutine with the `go` keyword, spawning a task in Rust is done by handing a function (usually a Ruby-esque closure) to the `task::spawn` library function. (Note also that "higher-order functions" are not the same as "first-class functions".)

Go does not have pattern matching, to my knowledge, though without algebraic datatypes I don't think it's really a big deal.

Go has first class functions yes, but without the support for generics/parametric polymorphism, you can't write "higher order functions" for polymorphic functional constructs like map/filter/reduce etc.