E07660: operator name cannot be used as a method

What went wrong

You're using an operator symbol as a method name, which is invalid. Operators must use the 'operator' keyword.

Worked examples

Compilable examples demonstrating this error and the correct fix:

• ek9 -q 137 (How do I manage resources with try-with-resources in EK9?)

See also

• Methods use NAMES: getLength(), process(), calculate()
• Operators use SYMBOLS with 'operator' keyword: operator +, operator ==
• E07660: operator symbol as method name (this error)
• E07620: operator not defined

How to fix it

1. Use 'operator' keyword for operators

Common causes

• Missing 'operator' keyword
• Trying to use symbol as method name

Examples

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

Fails with E07660: operator name cannot be used as a method

#!ek9
defines module error.e07660.bad

  defines text for "en"

    ButtonLabels
      close()
        "Close"

      contains()
        -> item as String
        `Contains ${item}`

      length()
        "Length"

      openLabel()
        "Open"

Fixed: Name the method for what it gives

#!ek9
defines module error.e07660.good

  defines text for "en"

    ButtonLabels
      closeLabel()
        "Close"

      containsLabel()
        -> item as String
        `Contains ${item}`

      lengthLabel()
        "Length"

Questions and answers

These Q&A entries show E07660 and its fix:

• Q137: How do I manage resources with try-with-resources in EK9?