[jira] [Updated] (GROOVY-11241) Regression in STC generics solution

[Eric Milles (Jira)]

     [ 
https://issues.apache.org/jira/browse/GROOVY-11241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Eric Milles updated GROOVY-11241:
---------------------------------
    Description: 
The following code, which works in 4.0.14 and below, incorrectly produces an 
error in 4.0.16.

Expected result: {{mapTry(Option::get)}} unwraps the {{Try<Option<Integer>>}} 
into a {{Try<Integer>}}

https://www.javadoc.io/doc/io.vavr/vavr/0.10.4/io/vavr/control/Try.html

Actual:
{code}
[Static type checking] - Incompatible generic argument types. Cannot assign 
io.vavr.control.Try<io.vavr.control.Option<java.lang.Integer>> to: 
io.vavr.control.Try<java.lang.Integer>
{code}

{code}
import groovy.transform.CompileStatic
import io.vavr.control.Option
import io.vavr.control.Try

@Grab('io.vavr:vavr:0.10.4')
@CompileStatic
class Repro {
    Option<Integer> option() {
        Option.of(3)
    }

    Try<Integer> repro() {
        Try.of { option() }
            .mapTry(Option::get)
    }
}
{code}

  was:
The following code, which works in 4.0.14 and below, incorrectly produces an 
error in 4.0.16.

Expected result: {{mapTry(Option::get)}} unwraps the {{Try<Option<Integer>>}} 
into a {{Try<Integer>}}

Actual:
{code}
[Static type checking] - Incompatible generic argument types. Cannot assign 
io.vavr.control.Try<io.vavr.control.Option<java.lang.Integer>> to: 
io.vavr.control.Try<java.lang.Integer>
{code}

{code}
import groovy.transform.CompileStatic
import io.vavr.control.Option
import io.vavr.control.Try

@Grab('io.vavr:vavr:0.10.3')
@CompileStatic
class Repro {
    Option<Integer> option() {
        Option.of(3)
    }

    Try<Integer> repro() {
        Try.of { option() }
            .mapTry(Option::get)
    }
}
{code}


> Regression in STC generics solution
> -----------------------------------
>
>                 Key: GROOVY-11241
>                 URL: https://issues.apache.org/jira/browse/GROOVY-11241
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static Type Checker
>    Affects Versions: 4.0.16
>            Reporter: Christopher Smith
>            Assignee: Eric Milles
>            Priority: Major
>
> The following code, which works in 4.0.14 and below, incorrectly produces an 
> error in 4.0.16.
> Expected result: {{mapTry(Option::get)}} unwraps the {{Try<Option<Integer>>}} 
> into a {{Try<Integer>}}
> https://www.javadoc.io/doc/io.vavr/vavr/0.10.4/io/vavr/control/Try.html
> Actual:
> {code}
> [Static type checking] - Incompatible generic argument types. Cannot assign 
> io.vavr.control.Try<io.vavr.control.Option<java.lang.Integer>> to: 
> io.vavr.control.Try<java.lang.Integer>
> {code}
> {code}
> import groovy.transform.CompileStatic
> import io.vavr.control.Option
> import io.vavr.control.Try
> @Grab('io.vavr:vavr:0.10.4')
> @CompileStatic
> class Repro {
>     Option<Integer> option() {
>         Option.of(3)
>     }
>     Try<Integer> repro() {
>         Try.of { option() }
>             .mapTry(Option::get)
>     }
> }
> {code}



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