class

ReadonlyErr

const class ReadonlyErr : Err

ReadonlyErr indicates an attempt to modify a readonly instance. It is commonly used with List and Map.

 constructors make

Construct with specified error message and optional root cause

 make new make(Str msg := "", Err? cause := null)

Construct with specified error message and optional root cause.

 Haxall 4.0.6 ∙ 21-Jul-2026 09:48 EDT