[ https://issues.apache.org/jira/browse/GROOVY-7772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
UEHARA Junji updated GROOVY-7772: --------------------------------- Description: Groovy's operator .& for method is similar functionality to Java8's method reference operator ::. ||No.||lhs||rhs||meaing of Groovy's .& (Closure) ||meaning of java8's :: (FunctionalInterface)|| |1|instance|instanceMethod| { ..args -> instance.instanceMethod(args) | same as groovy | |2|Class|staticMethod| { ..args -> Class.staticMethod(args) | same as groovy | |3|instance|staticMethod| ERROR groovy.lang.MissingMethodException: | Error same as groovy (compile error) | |4|Class|instanceMethod|error| Function<RetType,Class,Args..>, where method instance method of Class which is declared as ```RetType instanceMethod(Args..) {...}```. In other words it is interpreted as a function which takes LHS Class as the first parameter which additionally inserted to the method.)| IMHO, No 4. is useful. * You can do: {code} ["a,b,c"].collect ( String.&toUpperCase ) {code} * Can have correspond operator to java8's ::. which is understandablea and needed for Java programmers. was: Groovy's operator .& for method is similar functionality to Java8's method reference operator ::. ||No.||lhs||rhs||meaing of Groovy's .& (Closure) ||meaning of java8's :: (FunctionalInterface)|| |1|instance|instanceMethod| { ..args -> instance.instanceMethod(args) | same as groovy | |2|Class|staticMethod| { ..args -> Class.staticMethod(args) | same as groovy | |3|instance|staticMethod| ERROR groovy.lang.MissingMethodException: | Error same as groovy (compile error) | |4|Class|instanceMethod|error| Function<RetType,Class,Args..>, where method instance method of Class which is declared as ```RetType instanceMethod(Args..) {...}```. In other words it is interpreted as a function which takes LHS Class as the first parameter which additionally inserted to the method.)| IMHO, No 4. is useful. * > Class.&instanceMethod had better to have same meaning of > Class::instanceMethod of Java8 > --------------------------------------------------------------------------------------- > > Key: GROOVY-7772 > URL: https://issues.apache.org/jira/browse/GROOVY-7772 > Project: Groovy > Issue Type: Improvement > Components: groovy-runtime > Affects Versions: 2.4.6 > Reporter: UEHARA Junji > Priority: Minor > > Groovy's operator .& for method is similar functionality to Java8's method > reference operator ::. > ||No.||lhs||rhs||meaing of Groovy's .& (Closure) ||meaning of java8's :: > (FunctionalInterface)|| > |1|instance|instanceMethod| { ..args -> instance.instanceMethod(args) | same > as groovy | > |2|Class|staticMethod| { ..args -> Class.staticMethod(args) | same as groovy | > |3|instance|staticMethod| ERROR groovy.lang.MissingMethodException: | Error > same as groovy (compile error) | > |4|Class|instanceMethod|error| Function<RetType,Class,Args..>, where method > instance method of Class which is declared as ```RetType > instanceMethod(Args..) {...}```. In other words it is interpreted as a > function which takes LHS Class as the first parameter which additionally > inserted to the method.)| > IMHO, No 4. is useful. > * You can do: > {code} > ["a,b,c"].collect ( String.&toUpperCase ) > {code} > * Can have correspond operator to java8's ::. which is understandablea and > needed for Java programmers. -- This message was sent by Atlassian JIRA (v6.3.4#6332)