russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
27 lines
1.1 KiB
Java
27 lines
1.1 KiB
Java
/*
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* @test /nodynamiccopyright/
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* @bug 8304487
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* @summary Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview)
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* @enablePreview
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* @compile/fail/ref=PrimitiveInstanceOfErrors.out -XDrawDiagnostics -XDshould-stop.at=FLOW PrimitiveInstanceOfErrors.java
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*/
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public class PrimitiveInstanceOfErrors {
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public static boolean unboxingAndNarrowingPrimitiveNotAllowedPerCastingConversion() {
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Long l_within_int_range = 42L;
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Long l_outside_int_range = 999999999999999999L;
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return l_within_int_range instanceof int && !(l_outside_int_range instanceof int);
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}
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public static <T extends Integer> boolean wideningReferenceConversionUnboxingAndNarrowingPrimitive(T i) {
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return i instanceof byte;
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}
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public static void boxingConversionsBetweenIncompatibleTypes() {
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int i = 42;
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boolean ret1 = i instanceof Integer; // (Integer) i // OK and true
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boolean ret2 = i instanceof Double; // error: incompatible types
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boolean ret3 = i instanceof Short; // error: incompatible types
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}
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}
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