Swift记录行号和方法名称[副本]

Swift提供了一些表达式,以便记录行号和方法名称等:

Literal     Type    Value
#file       String  The name of the file in which it appears.
#line       Int     The line number on which it appears.
#column     Int     The column number in which it begins.
#function   String  The name of the declaration in which it appears.

例如:

func logFunctionName(string: String = #function) {
    print(string)
}
func myFunction() {
    logFunctionName() // Prints "myFunction()".
}

official documentation