() | Function application | Represents a function call |
[] | Subscript access | Represents a call to the overridable [] operator; example: fooList[1] passes the int 1 to fooList to access the element at index 1 |
?[] | Conditional subscript access | Like [], but the leftmost operand can be null; example: fooList?[1] passes the int 1 to fooList to access the element at index 1 unless fooList is null (in which case the expression evaluates to null) |
. | Member access | Refers to a property of an expression; example: foo.bar selects property bar from expression foo |
?. | Conditional member access | Like ., but the leftmost operand can be null; example: foo?.bar selects property bar from expression foo unless foo is null (in which case the value of foo?.bar is null) |
! | Non-null assertion operator | Casts an expression to its underlying non-nullable type, throwing a runtime exception if the cast fails; example: foo!.bar asserts foo is non-null and selects the property bar, unless foo is null in which case a runtime exception is thrown |
