Scott Murphy Heiberg created GROOVY-12561:
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Summary: SC: a closure assigned to a subscript or property of a
functional interface type is stored unconverted
Key: GROOVY-12561
URL: https://issues.apache.org/jira/browse/GROOVY-12561
Project: Groovy
Issue Type: Bug
Components: Static compilation
Affects Versions: 5.0.8, 4.0.33, 6.0.0
Reporter: Scott Murphy Heiberg
Under {{@CompileStatic}}, a closure assigned to a subscript or a property whose
type is a functional interface is stored as the closure itself when the method
that stores it declares its parameter with a type parameter: {{putAt}} of a
{{Map<String, Function<String, String>>}} or {{List<Supplier<String>>}}, or the
setter or field of a {{Holder<T>}} property for a {{Holder<Supplier<String>>}}.
A later call of the interface method fails:
{code:groovy}
import java.util.function.Function
@groovy.transform.CompileStatic
Map<String, Function<String, String>> make() {
Map<String, Function<String, String>> map = [:]
map['shout'] = { String s -> s + '!' }
map
}
make().shout.apply('hi') // MissingMethodException: No signature of method:
apply ... (a Closure was stored)
{code}
The same holds for {{map?['k'] = ...}}, {{map.k = ...}}, {{holder.value =
...}}, {{box.@field = ...}} and the named constructor argument {{new
Holder<Supplier<String>>(value: { ... })}}. Assigning to a variable of the
interface type converts the closure.
Expected: the closure is converted to the type of the subscript or property, as
for a variable, and the value of the assignment is the converted closure.
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