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From Paul King <pa...@asert.com.au>
Subject Re: Groovy 2.5 @Macro ?
Date Sun, 27 May 2018 00:56:01 GMT
I'll try to add in some basic information. I didn't realise that wasn't
covered at all.

On Sun, May 27, 2018 at 9:55 AM, mg <mgbiz@arscreat.com> wrote:

> Hi Guillaume,
>
> yes, there seems to be nothing on @Macro.
>
> Cheers,
> mg
>
> -------- Ursprüngliche Nachricht --------
> Von: Guillaume Laforge <glaforge@gmail.com>
> Datum: 26.05.18 21:15 (GMT+01:00)
> An: dev@groovy.apache.org
> Betreff: Re: Groovy 2.5 @Macro ?
>
> Did you also check the documentation?
> http://docs.groovy-lang.org/next/html/documentation/#_macros
>
> On Sat, May 26, 2018 at 7:04 PM mg <mgbiz@arscreat.com> wrote:
>
>> Hi Cedric,
>>
>> thank you for replying. I did try having the @Macro annotated in a
>> (static) method in a seperate class first, then moved it closer to the
>> test. I posted that  for brevity, and since I was banking on the author of
>> the feature to set me straight...
>>
>> The release notes (http://groovy-lang.org/releasenotes/groovy-2.5.html)
>> currently have the following to say on the topic:
>> Macro support
>>
>> With Groovy 2.5, you can write macros in Groovy!
>> Expressions and statements
>>
>> TBD
>> Macro classes
>>
>> TBD
>> AST matching
>>
>> TBD
>>
>> -------- Ursprüngliche Nachricht --------
>> Von: Cédric Champeau <cedric.champeau@gmail.com>
>> Datum: 26.05.18 18:12 (GMT+01:00)
>> An: dev@groovy.apache.org
>> Betreff: Re: Groovy 2.5 @Macro ?
>>
>> I didn't check, but I _think_ you can't define a macro and use it in the
>> same file.
>>
>> Le sam. 26 mai 2018 à 17:15, MG <mgbiz@arscreat.com> a écrit :
>>
>>> I would have expected a quick "you can't use it like that / you just
>>> have to / here is some documentation" reply...
>>> Then let me rephrase my question: Why are these Groovy 2.5 tests green:
>>> https://github.com/apache/groovy/blob/GROOVY_2_5_X/
>>> subprojects/groovy-macro/src/test/groovy/org/codehaus/groovy/macro/
>>> MacroTransformationTest.groovy
>>> ?
>>> Cheers,
>>> mg
>>>
>>> On 26.05.2018 00:00, MG wrote:
>>>
>>> Hi guys,
>>>
>>> giving the new Groovy 2.5 macro functionality a spin, and would have
>>> expected the code below to replace the "call" to nv(x) with the AST
>>> expression created in the method, i.e. returning the name of the "passed"
>>> variable. Instead no macro magic happens, and the compilation accordingly
>>> fails with "groovy.lang.MissingMethodException: No signature of method:
>>> groovy.GroovyMacroSpike.nv() is applicable for argument types: (Integer)
>>> values: [123]":
>>>
>>> import org.codehaus.groovy.ast.expr.Expressionimport org.codehaus.groovy.ast.expr.VariableExpressionimport
org.codehaus.groovy.macro.runtime.Macroimport org.codehaus.groovy.macro.runtime.MacroContextimport
org.junit.Ignoreimport org.junit.Testimport static org.codehaus.groovy.ast.tools.GeneralUtils.constX
>>> class GroovyMacroSpike {
>>>   @Test  @Ignore  void nvTest() {
>>>     final x = 123    assert x == 123    assert nv(x) == "x"  }
>>>
>>>   @Macro  Expression nv(MacroContext ctx, VariableExpression variable) {
>>>     return constX(variable.getName());
>>>   }
>>> }
>>>
>>> What is missing to make this work ?
>>> mg
>>>
>>>
>>>
>>>
>
> --
> Guillaume Laforge
> Apache Groovy committer & PMC Vice-President
> Developer Advocate @ Google Cloud Platform
>
> Blog: http://glaforge.appspot.com/
> Twitter: @glaforge <http://twitter.com/glaforge>
>

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