E06250: the order and naming of arguments must match parameters

What went wrong

When using named parameters, the names must EXACTLY match the parameter names in the method/function definition.

Worked examples

Compilable examples demonstrating this error and the correct fix:

• ek9 -q 1343 (Why does EK9 reject a named argument whose name does n...)

How to fix it

1. Check function/method signature for correct parameter names
2. Match parameter names exactly (case-sensitive)
3. Keep named parameters in declaration order

Common causes

• Typo in parameter name
• Wrong parameter name from memory
• Parameters in wrong order with wrong names
• Refactoring changed parameter names

See also

• E06250: wrong parameter name (this error)
• E06240: mixed named/positional parameters
• E06270: wrong parameter type

Examples

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

Fails with E06250: the order and naming of arguments must match parameters

#!ek9
defines module error.e06250.bad

  defines class

    Ledger
      record()
        ->
          label as String
          amount as Float
        <- rtn as Boolean: label? and amount?

  defines function

    wrongNames()
      <- rtn as Boolean?
      ledger <- Ledger()
      rtn: ledger.record(
        name: "Steve",
        total: 1.0
      )

    wrongOrder()
      <- rtn as Boolean?
      ledger <- Ledger()
      rtn: ledger.record(
        amount: "Steve",
        label: 1.0
      )

Fixed: Use the parameters' own names, in their own order

#!ek9
defines module error.e06250.good

  defines class

    Ledger
      record()
        ->
          label as String
          amount as Float
        <- rtn as Boolean: label? and amount?

  defines function

    rightNames()
      <- rtn as Boolean?
      ledger <- Ledger()
      rtn: ledger.record(label: "Steve", amount: 1.0)

Questions and answers

These Q&A entries show E06250 and its fix:

• Q1343: Why does EK9 reject a named argument whose name does not match the parameter?