damouse / cumin

Reflected method invocations with arbitrary types in Go

Cumin

Cumin is a function currying library with dynamic invocation implemented through runtime function introspection and parameter type coercion. It basically provides support for generic functions in Go: arbitrary functions with arbitrary invocations.

Cumin allows for go code to accept any function as a callback handler. This is somewhat antithetical to golang's principles, and there's a wealth of debate around generics in go, but this is useful in situations like exposing go functions to python.

It works by reflecting the type and number of parameters in passed functions, testing those types against incoming parameters, and attempting to cast those types appropriately.

Examples

fn := func() int {
  return 1
}

c, _ := NewCurry(fn)

// Returns 1
r, err := c.Invoke([]interface{}{})

// Returns an invocation error: too many arguments
r, err := c.Invoke([]interface{}{1, 2})