How to declare several properties on one line

Looking at the grammar this is not possible:

property (used by memberDeclaration, declaration, toplevelObject)
  : modifiers ("val" | "var")
      typeParameters? (type "." | annotations)?
      (multipleVariableDeclarations | variableDeclarationEntry)
      typeConstraints
      ("by" | "=" expression SEMI?)?
      (getter? setter? | setter? getter?) SEMI?
  ;

You can only do destructing declarations with:

val (name, age) = person

No, there is no way to do that. Declaring multiple properties on the same line is frowned upon by many Java style guides, so we did not implement support for that in Kotlin.