E07010: remove 'override' with use of 'private' access modifier

What went wrong

You've marked a PRIVATE method with 'override', but private methods cannot override anything - they are invisible to subclasses.

Worked examples

Compilable examples demonstrating this error and the correct fix:

• ek9 -q 573 (What are the access modifier rules for method overrides?)
• ek9 -q 676 (How do override and access modifiers interact in a three-...)

How to fix it

1. Remove 'override' if this is a new private method
2. Change to protected/public if it should truly override
3. Private methods are always independent in each class

Common causes

• Method was public, got changed to private, 'override' left behind
• Copy/paste from non-private method
• Misunderstanding private visibility

See also

• E07010: private with override (this error)
• E07020: abstract with override (also contradictory)

Examples

Every example is compiled by the EK9 compiler: the first fails exactly as captioned, the others fix it.

Fails with E07010: remove 'override' with use of 'private' access modifier

#!ek9
defines module error.e07010.bad

  defines class

    Account as open
      private auditCode()
        <- rtn as String: "A"

    Savings extends Account

      //A private method cannot override, and a private parent method cannot be overridden
      override private auditCode()
        <- rtn as String: "S"

Fixed: Override a visible method, and drop private

#!ek9
defines module error.e07010.good

  defines class

    Account as open
      auditCode()
        <- rtn as String: "A"

    Savings extends Account
      override auditCode()
        <- rtn as String: "S"

Questions and answers

These Q&A entries show E07010 and its fix:

• Q573: What are the access modifier rules for method overrides?
• Q676: How do override and access modifiers interact in a three-level class hierarchy?