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  1. Groovy
  2. GROOVY-7956

Provide an AST transformation which improves named parameter support

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    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.5.0-beta-3
    • Component/s: GEP
    • Labels:
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      Description

      In order to aid static compilation for builders we have @DelegatesTo which allows statically compiled code to know what the delegate of a closure is.

      This proposal is to allow @DelegatesTo on Map types such that IDEs and the static compiler can resolve the target type the named arguments are to be used on.

      For example:

      class Farm {
           void animal(@DelegatesTo(Animal) Map arguments, @DelegatesTo(AnimalBuilder) Closure callable) {
                   def animal = new Animal(arguments)
                   // handle closure
          }
      } 
      
      class Animal { String name }
      

      The following code would then fail to compile :

      def farm = new Farm()
      // compilation failure, no name property on Animal
      farm.animal(nam: "Dog")  { 
      }
      

      It would then be down to IDEs to also provide support for code completion etc.

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              • Assignee:
                paulk Paul King
                Reporter:
                graemerocher1 Graeme Rocher
              • Votes:
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                9 Start watching this issue

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                • Created:
                  Updated:
                  Resolved: