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/*
* @test /nodynamiccopyright/
* @bug 8304487 8325653 8332463
* @summary Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview)
* @enablePreview
* @compile/fail/ref=PrimitivePatternsSwitchErrors.out -XDrawDiagnostics -XDshould-stop.at=FLOW PrimitivePatternsSwitchErrors.java
*/
public class PrimitivePatternsSwitchErrors {
record R_int(int x) {}
public static void dominationBetweenPrimitivePatterns() {
int i = 42;
switch (i) {
case short s -> System.out.println("its a short");
case byte b -> System.out.println("its a byte"); // Error - dominated!
default -> System.out.println("any other integral value");
}
}
public static int dominationWithRecordPatterns() {
R_int r = new R_int(42);
return switch (r) {
case R_int(int x) -> 1;
case R_int(byte x) -> 2; // Error - dominated!
};
}
public static int inconvertibleNestedComponent() {
R_int r = new R_int(42);
return switch (r) {
case R_int(Long x) -> 1; // inconvertible
};
}
public static int nonExhaustive1() {
int i = 42;
return switch (i) { // Error - not exhaustive
case short s -> s;
};
}
public static int nonExhaustive2() {
int i = 42;
return switch (i) { // Error - not exhaustive
case byte b -> 1;
case short s -> 2;
};
}
public static int nonExhaustive3() {
int i = 42;
return switch (i) { // Error - not exhaustive
case byte b -> 1;
case float f -> 2;
};
}
public static int dominationBetweenBoxedAndPrimitive() {
int i = 42;
return switch (i) {
case Integer ib -> ib;
case byte ip -> ip; // OK - not dominated!
};
}
public static int constantDominatedWithPrimitivePattern() {
int i = 42;
return switch (i) {
case int j -> 42;
case 43 -> -1; // Error - dominated!
};
}
public static int constantDominatedWithFloatPrimitivePattern() {
float f = 42.0f;
return switch (f) {
case Float ff -> 42;
case 43.0f -> -1; // Error - dominated!
};
}
void switchLongOverByte(byte b) {
switch (b) {
case 0L: return ;
}
}
void switchOverPrimitiveFloatFromInt(float f) {
switch (f) {
case 16777216:
break;
case 16777217:
break;
default:
break;
}
}
void switchOverNotRepresentableFloat(Float f) {
switch (f) {
case 1.0f:
break;
case 0.999999999f:
break;
case Float fi:
break;
}
}
int switchOverPrimitiveBooleanExhaustiveWithNonPermittedDefault(boolean b) {
return switch (b) {
case true -> 1;
case false -> 2;
default -> 3;
};
}
int switchOverPrimitiveBooleanExhaustiveWithNonPermittedDefaultStatement(boolean b) {
switch (b) {
case true: return 1;
case false: return 2;
default: return 3;
}
}
int switchOverPrimitiveBooleanExhaustiveWithNonPermittedUnconditionalStatement(boolean b) {
switch (b) {
case true: return 1;
case false: return 2;
case boolean bb: return 3; // error
}
}
void switchCombinationsNonIntegral() {
float f = 0f;
long l = 0L;
double d = 0d;
Float fB = 0F;
Long lB = 0L;
Double dB = 0D;
switch (f) {
case 1l: return;
case 2f: return;
case 3d: return;
default:
}
switch (l) {
case 1l: return;
case 2f: return;
case 3d: return;
default:
}
switch (d) {
case 1l: return;
case 2f: return;
case 3d: return;
default:
}
switch (fB) {
case 1l: return;
case 2f: return;
case 3d: return;
default:
}
switch (lB) {
case 1l: return;
case 2f: return;
case 3d: return;
default:
}
switch (dB) {
case 1l: return;
case 2f: return;
case 3d: return;
default:
}
}
int switchOverPrimitiveBooleanExhaustiveWithNonPermittedUnconditional(boolean b) {
return switch (b) {
case true -> 1;
case false -> 2;
case boolean bb -> 3; // error
};
}
int duplicateUnconditionalWithPrimitives(int i) {
return switch (i) {
case int ii -> 1;
case long l -> 2; // error
};
}
int booleanSingleCase1(boolean b) {
return switch (b) {
case true -> 1;
};
}
int booleanSingleCase2(boolean b) {
switch (b) {
case true: return 1;
}
}
void nullAndPrimitive() {
int i = 42;
switch (i) {
case short s -> System.out.println("its a short");
case null -> System.out.println("oops");
default -> System.out.println("any other integral value");
}
}
public static int nonExhaustive4() {
Number n = Byte.valueOf((byte) 42);
return switch (n) { // Error - not exhaustive
case byte b when b == 42 -> 1;
case byte b -> -1 ;
};
}
public static int nonExhaustive5() {
Object n = 42;
return switch (n) { // Error - not exhaustive
case int b when b == 42 -> 1;
case int b -> -1 ;
};
}
public static int nonExhaustive6() {
Object n = 42;
return switch (n) { // Error - not exhaustive
case byte b -> -1 ;
case int b -> -2 ;
};
}
public static int disallowedUnboxingAndNarrowing1() {
Long n = 42l;
return switch (n) { // Error - not exhaustive and not allowed
case char c -> -1 ;
};
}
public static int disallowedUnboxingAndNarrowing2() {
Long n = 42l;
return switch (n) { // Error - not exhaustive and not allowed
case int c -> -1 ;
};
}
public static char disallowedUnboxingAndWidening(Short test) {
return switch (test) {
case char c -> c; // Error - not exhaustive and not allowed
};
}
public static <T extends Integer> boolean wideningReferenceConversionUnboxingAndNarrowingPrimitive(T i) {
return i instanceof byte b; // not allowed as a conversion
}
}
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