[#GROOVY-1467] Default method parameters

groovy

Default method parameters

Created: 18/Aug/06 02:43 AM Updated: 23/Dec/07 12:25 PM

Component/s:

command line processing

Affects Version/s:

1.0-JSR-6

Fix Version/s:

1.5.2

Time Tracking:

Not Specified

Environment:

Win XP, JDK1.5.0_06, JSR-06

Description

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A method declarator in an interface may include one or more default parameters.
These defaults should apply to only the parameters at the end of the parameter list.
JSR-06 permits them to appear anywhere.

Question: Do defaults in interfaces make sense? Could a class implementing the interface
offer a different default value? This leads to ambiguity.

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Jochen Theodorou - 18/Aug/06 04:20 AM

offering a different default value is possible. But default args shouldn't be allowed in interfaces. It should generate non-abstract instance methods, which is not alllowed to do in an interface. So default args musn't be allowed for interfaces if the method is not static

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Andres Almiray - 03/Dec/07 10:37 PM

1.1-final-SNAPSHOT still allows the following

interface Foo {
   def doit( String param = "Groovy", int o )
}

def foo = { p -> p } as Foo

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Paul King - 23/Dec/07 06:04 AM

Now gives an error message