Holger Austinat created GROOVY-11449:
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Summary: Improve documentation on Named Method Parameters
Key: GROOVY-11449
URL: https://issues.apache.org/jira/browse/GROOVY-11449
Project: Groovy
Issue Type: Improvement
Components: Documentation
Reporter: Holger Austinat
Section 3.2.2 of the _Groovy Object Orientation_ documentation describes named
method parameters
([http://groovy-lang.org/objectorientation.html#_named_parameters_2]).
All name parameters are collected in a map, and passed in as first parameter to
the called method. One corner case is not mentioned, though: when you call the
method without any named parameter, the map is not created and not passed in.
Thus, one should make the map optional:
{code:groovy}
def foo(Map args=[:], Integer number)
{code}
If not optional, one gets a {{{}groovy.lang.MissingMethodException: No
signature of method{}}}.
This is a tricky, unintuitive case which should be explicitly mentioned in the
documentation.
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