Why does this Kotlin method have enclosing backticks?

by

It’s because is is a reserved keyword in Kotlin. Since Kotlin is supposed to be interoperable with Java and is is a valid method (identifier) name in Java, the backticks are used to escape the method so that it can be used as a method without confusing it as a keyword. Without it it will not work because it would be invalid syntax.

This is highlighted in the Kotlin documentation:

Escaping for Java identifiers that are keywords in Kotlin

Some of the Kotlin keywords are valid identifiers in Java: in, object, is, etc. If a Java library uses a Kotlin keyword for a method, you can still call the method escaping it with the backtick (`) character

foo.`is`(bar)

More Related Contents:

  1. new keyword in method signature
  2. Smart cast to ‘Type’ is impossible, because ‘variable’ is a mutable property that could have been changed by this time
  3. What is the difference between var and val in Kotlin?
  4. How to write ternary conditional operator?
  5. What is a “receiver” in Kotlin?
  6. Single exclamation mark in Kotlin
  7. Jooq fetchInto with default value if field is null
  8. Kotlin: how to pass a function as parameter to another?
  9. What does the suspend function mean in a Kotlin Coroutine?
  10. What does ?: do in Kotlin? (Elvis Operator)
  11. serializable in desired format in kotlin
  12. What is the Kotlin double-bang (!!) operator?
  13. How to read a text file from resources in Kotlin?
  14. When should one prefer Kotlin extension functions?
  15. How can I suppress unchecked cast warnings?
  16. how to run compiled class file in Kotlin?
  17. Web scraping with jsoup in Kotlin
  18. Why not use GlobalScope.launch?
  19. Getters and Setters in Kotlin
  20. Override getter for Kotlin data class
  21. Sort collection by multiple fields in Kotlin [duplicate]
  22. Coroutines: runBlocking vs coroutineScope
  23. warning: Kotlin runtime JAR files in the classpath should have the same version
  24. Difference between ArrayList() and mutableListOf() in Kotlin
  25. How do I replace duplicate whitespaces in a String in Kotlin?
  26. Kotlin data class: how to read the value of property if I don’t know its name at compile time?
  27. Kotlin Foo::class.java “Unresolved Reference: Java” error
  28. How does erasure work in Kotlin?
  29. kotlin program error: no main manifest attribute in jar file
  30. Why do we use “companion object” as a kind of replacement for Java static fields in Kotlin?

Leave a Comment