E07450: function must have no parameters

What went wrong

A function that should have NO parameters has parameters defined.

Worked examples

Compilable examples demonstrating this error and the correct fix:

• ek9 -q 812 (What are common stream pipeline errors in EK9?)

How to fix it

1. Remove parameters from function definition
2. Or use appropriate function type with parameters

Common causes

• Wrong function type for context
• Copy/paste from parameterized function

See also

• E07450: unexpected parameters (this error)
• E07460: single parameter required

Examples

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

Fails with E07450: function must have no parameters

#!ek9
defines module error.e07450.bad

  defines function

    howMany()
      -> count as Integer
      <- rtn as Integer: count

    firstOnes()
      collection <- List() of String

      //head calls the function with no arguments
      cat ["last", "first"] | head howMany > collection

Fixed: Give head a function that takes no parameters

#!ek9
defines module error.e07450.good

  defines function

    howMany()
      <- rtn as Integer: 1

    firstOnes()
      <- rtn as List of String: List()
      cat ["last", "first"] | head howMany > rtn

Questions and answers

These Q&A entries show E07450 and its fix:

• Q812: What are common stream pipeline errors in EK9?