[jira] [Commented] (GROOVY-7956) Provide an AST transformation which improves named parameter support

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-7956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16369629#comment-16369629 ] 

ASF GitHub Bot commented on GROOVY-7956:
----------------------------------------

GitHub user paulk-asert opened a pull request:

    https://github.com/apache/groovy/pull/664

    GROOVY-7956: Provide an AST transformation which improves named param…

    …eter support

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/paulk-asert/groovy groovy7956

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/groovy/pull/664.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #664
    
----
commit 43f2c8e47b2072e2c0e42097c4462180af30efdb
Author: paulk <pa...@...>
Date:   2018-02-20T00:09:59Z

    GROOVY-7956: Provide an AST transformation which improves named parameter support

----


> Provide an AST transformation which improves named parameter support
> --------------------------------------------------------------------
>
>                 Key: GROOVY-7956
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7956
>             Project: Groovy
>          Issue Type: New Feature
>          Components: GEP
>            Reporter: Graeme Rocher
>            Priority: Major
>
> 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:
> {code}
> class Farm {
>      void animal(@DelegatesTo(Animal) Map arguments, @DelegatesTo(AnimalBuilder) Closure callable) {
>              def animal = new Animal(arguments)
>              // handle closure
>     }
> } 
> class Animal { String name }
> {code}
> The following code would then fail to compile :
> {code}
> def farm = new Farm()
> // compilation failure, no name property on Animal
> farm.animal(nam: "Dog")  { 
> }
> {code}
> It would then be down to IDEs to also provide support for code completion etc.



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