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https://issues.apache.org/jira/browse/GROOVY-10271?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stefanos Chaliasos updated GROOVY-10271:
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Summary: Wrong inference when using ternary operator with closure and
variable (was: Wrong inference when using ternary operator with lambda and
variable)
> Wrong inference when using ternary operator with closure and variable
> ---------------------------------------------------------------------
>
> Key: GROOVY-10271
> URL: https://issues.apache.org/jira/browse/GROOVY-10271
> Project: Groovy
> Issue Type: Bug
> Components: Static compilation, Static Type Checker
> Affects Versions: 4.0.0-alpha-3, 4.0.0-beta-1, 3.0.9
> Reporter: Stefanos Chaliasos
> Priority: Major
>
> I have the following Groovy program.
> {code:groovy}
> import java.util.function.Supplier;
> @groovy.transform.TypeChecked
> class Main {
> static final void foo(Supplier<Integer> x) {}
> public static final void main() {
> Supplier<Integer> y = { -> 5 }
> Supplier<Integer> z = (true) ? y : {-> 5}
> }
> }
> {code}
> h2. Actual Behavior
> The program does not compile, and I get the following error.
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> Main.groovy: 11: [Static type checking] - Cannot assign value of type
> java.lang.Object to variable of type
> java.util.function.Supplier<java.lang.Integer>
> @ line 11, column 29.
> Supplier<Integer> z = (true) ? y : {-> 5}
> ^
> 1 error
> {code}
> h2. Expected Behavior
> Compile successfully.
> h2. Comment
> Tested against 4-beta-1, 4-alpha-3, 3.0.9, and master (commit:
> b26dbbeabe1e3d27d30c936701b1a571e24d5ab2). Maybe similar to GROOVY-10114, but
> with function types.
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