wrap-java: Optional convenience methods can fail to compile when a parameter shadows the method name #945

Problem

Optional convenience methods generated by wrap-java invoke the original method without a receiver. A parameter can therefore shadow that method and make the generated Swift fail to compile.

Example

This Java declaration:

public OptionalLong arg0(OptionalLong value) { return value; }

produces a Swift convenience method whose argument is also named arg0:

open func arg0Optional(_ arg0: Int64?) -> Int64? {
  Optional(javaOptional: arg0(arg0.toJavaOptional()))
}

The body attempts to call the Optional argument as a function instead of calling the original method.

Reference workaround implementation: qoncept#8