[jira] [Created] (GROOVY-9983) Type argument inference does not work in ternary operator

[Stefanos Chaliasos (Jira)]

Stefanos Chaliasos created GROOVY-9983:
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             Summary: Type argument inference does not work in ternary operator
                 Key: GROOVY-9983
                 URL: https://issues.apache.org/jira/browse/GROOVY-9983
             Project: Groovy
          Issue Type: Bug
          Components: Static compilation, Static Type Checker
            Reporter: Stefanos Chaliasos


I have the following Groovy program.
{code:groovy}
@groovy.transform.CompileStatic
public class Test {
  public static void main(String[] args) {
      final A<B> x = (true ? new A<>(new B()): new A<>(new C()))
      bar(x) // compiles
      bar((true ? new A<>(new B()): new A<>(new C()))) // does not compile
  }

  public static void bar(A<B> x) {}
}

class A<T> {
  T f;
  public A(T f) {
    this.f = f;
  }
}


class B {}
class C extends B{}

{code}
h2. Actual Behavior

The program does not compile, and I get the following error.
{code:java}
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Test.groovy: 6: [Static type checking] - Cannot call Test#bar(A <B>) with 
arguments [A <? extends B>]
 @ line 6, column 7.
         bar((true ? new A<>(new B()): new A<>(new C())))
         ^

1 error

{code}
h2. Expected Behavior

Compile successfully.
h2. Comment

This should be a regression bug because it compiles with the 4.0.0-alpha-2 
compiler.

h2. Affected Version

This programs fails when compiled with the compiler from the master (commit: 
f0eea862549529ef4e93fafe337f86dd4ac98751).



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