This is a Scala micro-library that provides:
- a
SourcePosclass that specifies a source file and line number, and - an implicit macro that forges a
SourcePosat the call site if none is available.
SourcePos is compiled for Scala 2.12, 2.13, and 3.0 (see release notes for exact versions).
libraryDependencies += "org.tpolecat" %% "sourcepos" % <version>If you want to know where a method call originated, demand an implicit SourcePos. It has fields for both file and line, and a toString that prints them as <file>:<line>, which most editors will hyperlink for you.
import org.tpolecat.sourcepos._
object Example {
def method(n: Int)(implicit sp: SourcePos): String =
s"You called me with $n from $sp"
def main(args: Array[String]): Unit =
println(method(42))
}Running this program on my computer yields:
You called me with 42 from /Users/rnorris/Scala/SourcePos/src/test/scala/Example.scala:9