mgroovy created GROOVY-9971:
-------------------------------
Summary: @TypeChecked: Closure<String> no longer compatible with
Closure<GString> argument
Key: GROOVY-9971
URL: https://issues.apache.org/jira/browse/GROOVY-9971
Project: Groovy
Issue Type: Bug
Components: Compiler
Affects Versions: 3.0.7
Environment: Windows 10
jdk-11.0.10.9-hotspot
IntelliJ 2020.3.2
Reporter: mgroovy
*Problem*
A Closure<String> is in Groovy 3 no longer compatible with a closure that
returns a GString (or String|GString), even though GString is autoconverted
to String in Groovy.
*Expected*
A Closure returning a GString or a String|GString should be compatible with
Closure<String>
*Sample Code*
{code:java}
import groovy.transform.TypeChecked
import org.junit.Ignore
import org.junit.Test
@TypeChecked
class Groovy3_ClosureOfString_GString_Compatible {
@Test @Ignore
void 'Groovy 3-0-7 Closure with String return type not compatible with
GString argument'() {
final x = 123
// Cannot find matching method
execStringCls(Closure<groovy.lang.GString>)
assert execStringCls { "x=$x" } == 'x=123'
//assert execStringCls { "x=$x".toString() } == 'x=123' //
works
}
@Test @Ignore
void 'Groovy 3-0-7 Closure with String return type not compatible with
GString argument 2'() {
final x = 123
// Cannot find matching method
execStringCls(Closure<java.io.Serializable>)
assert execStringCls { false ? 'abc' : "x=$x" } == 'x=123'
//assert execStringCls { true ? 'abc' : "x=$x".toString() } ==
'x=123' // works
}
String execStringCls(Closure<String> cls) {
cls()
}
}
{code}
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