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https://issues.apache.org/jira/browse/GROOVY-6324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17881003#comment-17881003
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Eric Milles commented on GROOVY-6324:
-------------------------------------
Proper static compilation support would require a transform from the call expr
"a.b(c)" to "a.b.call(c)". This would require checking for a callable property
"a.b" in StaticTypeCheckingVisitor visitMethodCallExpression (likely just
before handleMissingMethod) and then some conversion in
MethodCallExpressionTransformer similar to how call on a closure variable is
handled. This is modeled after the dynamic MetaClassImpl's
invokePropertyOrMissing.
Without something like that, it is possible to allow the dynamic handling of
callable property via a type-checking extension. This should be possible for
any release since Groovy 2.1:
{code:groovy}
class Car {
Closure model
}
@CompileStatic(extensions="scripts/Checker.groovy")
void test() {
def car = new Car(model: { -> 'Tesla' })
print car.model()
}
test()
// Checker.groovy ::
methodNotFound { rcvr, name, args, types, call ->
if (call instanceof MethodCallExpression) {
def property = new PropertyExpression(call.getReceiver(), name)
property.setImplicitThis(call.isImplicitThis())
if (existsProperty(property, true)) {
def type = getType(property)
if (type.equals(CLOSURE_TYPE)) {
if (type.getGenericsTypes()) {
type = type.getGenericsTypes()[0].getType()
} else {
type = OBJECT_TYPE
}
return makeDynamic(call, type)
}
}
}
}
{code}
> Cannot call closure like a method in type checked mode
> ------------------------------------------------------
>
> Key: GROOVY-6324
> URL: https://issues.apache.org/jira/browse/GROOVY-6324
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 2.2.0-beta-1, 2.3.0, 2.4.0-rc-1
> Reporter: Peter Niederwieser
> Priority: Major
>
> {{Closure closure = ...; closure()}} doesn't work in type-checked mode.
> Instead, one has to use {{closure.call()}}.
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