A gist by Miles Sabin may give you a hint: trait Companion[T] { type C def apply() : C } object Companion { implicit def companion[T](implicit comp : Companion[T]) = comp() } object TestCompanion { trait Foo object Foo { def bar = “wibble” // Per-companion boilerplate for access via implicit resolution implicit def companion … Read more
If there were such an option, one might have seen it in use here: https://github.com/scala/scala/pull/3669 But the tool of choice seems to be grep: scalac -Xlog-implicits test/files/neg/t2031.scala 2>&1 | grep diverg Since that area is under active development, now might be the time to submit a request for enhancement.
No, there isn’t. There is a ticket though: https://issues.scala-lang.org/browse/SI-2823
Since you’ve tagged this question with sympy, I will give such an example. From the documentation: http://docs.sympy.org/latest/modules/plotting.html. from sympy import var, plot_implicit var(‘x y’) plot_implicit(x*y**3 – y*x**3)
All I can add is: def foo(implicit a: Int, b: String) = println(a, b) implicit val i1 = 1 implicit val s = “” val i2 = 2 foo(i2, implicitly[String])
Actually, I’ve wanted this quite often before, but just came up with this idea. You can translate trait T(implicit impl: ClassName) { def foo = … // using impl here } to [EDITED: original version didn’t provide access to implicit for other methods] trait T { // no need to ever use it outside T … Read more
1) After rewriting your code as follows: case class Monoid[A](m0: A) // We only care about the zero here implicit def s[T] : Monoid[Set[T]] = Monoid(Set.empty[T]) implicit def l[T] : Monoid[List[T]] = Monoid(List.empty[T]) def mzero[A]()(implicit m: Monoid[A]) : A = m.m0 val zero = mzero[List[Int]]() val zero2: List[Int] = mzero() then becomes clearly why that … Read more
Resharper is primarily concerned with helping you refactor code, and the var keyword generally makes refactoring easier. For example, if the return values of any of those functions ever change to a compatibile type, you don’t have to change any of this code. It’s therefore now a little easier to refactor your tabCaseNotes type, for … Read more
One use case, as requested… Imagine you have a list of things, could be integers, floating point numbers, matrices, strings, waveforms, etc. Given this list, you want to add the contents. One way to do this would be to have some Addable trait that must be inherited by every single type that can be added … Read more
You cannot concatenate a string with an int. You would need to convert your int to a string using the str function, or use formatting to format your output. Change: – print(“Ok. Your balance is now at ” + balanceAfterStrength + ” skill points.”) to: – print(“Ok. Your balance is now at {} skill points.”.format(balanceAfterStrength)) … Read more