Mikhail Glukhikh
33 lines
1.2 KiB
Kotlin
Vendored
33 lines
1.2 KiB
Kotlin
Vendored
// TARGET_BACKEND: JVM
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// WITH_RUNTIME
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// FULL_JDK
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import kotlin.test.assertEquals
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import java.lang.reflect.ParameterizedType
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import java.lang.reflect.Type
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open class TypeLiteral<T> {
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val type: Type
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get() = (javaClass.getGenericSuperclass() as ParameterizedType).getActualTypeArguments()[0]
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}
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inline fun <reified T> typeLiteral(): TypeLiteral<T> = object : TypeLiteral<T>() {}
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fun box(): String {
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assertEquals("java.lang.String", (typeLiteral<String>().type as Class<*>).canonicalName)
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assertEquals("java.util.List<?>", typeLiteral<List<*>>().type.toString())
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//note that 'type' implementation for next cases is different on jdk 6 and 8: GenericArrayType and Class
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assertEquals("java.lang.String[]", typeLiteral<Array<String>>().type.canonicalName)
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assertEquals("java.lang.Integer[]", typeLiteral<Array<Int>>().type.canonicalName)
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assertEquals("java.lang.String[][]", typeLiteral<Array<Array<String>>>().type.canonicalName)
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return "OK"
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}
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val Type.canonicalName: String
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get() = when (this) {
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is Class<*> -> this.canonicalName
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is java.lang.reflect.GenericArrayType -> this.getGenericComponentType().canonicalName + "[]"
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else -> null!!
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} |