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From Guillaume Laforge <glafo...@gmail.com>
Subject Re: Groovy 2.5 @Macro ?
Date Sat, 26 May 2018 19:15:23 GMT
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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