How to identify calling method from a called method in swift

Question

here is a scenario

func callingMethod_A {
  self.someCalculation()
}

func callingMethod_B{
  self.someCalculation()
}

func someCalculation{
//how to find who          


        

Answer 1

I worked out a way to do this, for Swift code anyway:

Define a String parameter callingFunction and give it a default value of #function. Do not pass anything from the caller and the compiler provides the calling function name.

Building on @Anu.Krthik's answer:

func someCalculation (parameter: String, callingMethod: String = #function ) {
 print("In `\(#function)`, called by `\(callingMethod)`")
}

func foo(string: String) {
    someCalculation(parameter: string)
}

foo(string: "bar")

The above prints

In `someCalculation(parameter:callingMethod:)`, called by `foo(string:)`

However, beware that this technique can be subverted if the caller provides a value for the callingFunction parameter. if you call it with:

func foo(string: String) {
    someCalculation(parameter: string, callingMethod: "bogusFunctionName()")
}

You get the output

In `someCalculation(parameter:callingMethod:)`, called by `bogusFunctionName()`

instead.

Answer 2

You can use Thread.callStackSymbols like this

func callingMethod_A() {
    self.someCalculation()
}

func callingMethod_B(){
    self.someCalculation()
}

func someCalculation(){
    let origin = Thread.callStackSymbols
    print(origin[0])
    print(origin[1])
}