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Posted to notifications@groovy.apache.org by "tinne (JIRA)" <ji...@apache.org> on 2016/10/03 20:13:20 UTC
[jira] [Commented] (GROOVY-7935) Right side of assignment - remove
parens or not?
[ https://issues.apache.org/jira/browse/GROOVY-7935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15543290#comment-15543290 ]
tinne commented on GROOVY-7935:
-------------------------------
Looks like I stumbled over the fact that {{groovysh}} is even less groovyish than I expected, as I falsely derived by assumptions from whatever happens here:
{code:java}
groovy:000> bar = { -> 1 }
===> groovysh_evaluate$_run_closure1@5812f68b
groovy:000> m = bar
===> groovysh_evaluate$_run_closure1@5812f68b
groovy:000> m()
===> 1
{code}
This seems to be yet something different, as the following assignment gives a different closure behaving the same way:
{code:java}
groovy:000> m = this.&bar
===> org.codehaus.groovy.runtime.MethodClosure@5e4bd84a
groovy:000> m()
===> 1
{code}
> Right side of assignment - remove parens or not?
> ------------------------------------------------
>
> Key: GROOVY-7935
> URL: https://issues.apache.org/jira/browse/GROOVY-7935
> Project: Groovy
> Issue Type: Bug
> Components: Documentation
> Environment: http://groovy-lang.org/style-guide.html, release 2.4.7
> Reporter: tinne
> Assignee: John Wagenleitner
> Priority: Minor
> Fix For: 2.4.8
>
>
> The Groovy [style guide|http://groovy-lang.org/style-guide.html] says, "... Groovy doesn’t allow you to remove parentheses. [...] for nested method calls or on the right-hand side of an assignment, you can’t omit them there."
> Then, a code fragment is given, where just this works.
> {noformat}
> def foo(n) { n }
> println foo 1 // won't work, as documented
> def m = foo 1 // this works indeed!
> {noformat}
> Further more, I could not find any examples, where this would not work, neither with comma separated parameter lists nor with infix computations nor closures.
> So I guess it is just a documentation bug and right-hand side parens removal support has been added.
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