63 lines
3.6 KiB
Java
63 lines
3.6 KiB
Java
/*
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* @test /nodynamiccopyright/
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* @bug 8231827
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* @summary Basic pattern bindings scope test
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* @compile/fail/ref=DuplicateBindingTest.out -XDrawDiagnostics DuplicateBindingTest.java
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*/
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public class DuplicateBindingTest {
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int f;
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public static boolean main(String[] args) {
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Object o1 = "";
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Object o2 = "";
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if (args != null) {
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int s;
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if (o1 instanceof String s) { // NOT OK. Redef same scope.
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}
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if (o1 instanceof String f) { // OK to redef field.
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}
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}
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if (o1 instanceof String s && o2 instanceof String s) {} //error - already in scope on RHS (in scope due to LHS when true)
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if (o1 instanceof String s && !(o2 instanceof String s)) {} //error - already in scope on RHS (in scope due to LHS when true)
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if (!(o1 instanceof String s) && !(o2 instanceof String s)) {} //error - the same binding variable on LHS and RHS when false
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if (!(o1 instanceof String s) && (o2 instanceof String s)) {} //ok
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if (!(o1 instanceof String s) || o2 instanceof String s) {} //error - already in scope on RHS (in scope due to LHS when false)
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if (!(o1 instanceof String s) || !(o2 instanceof String s)) {} //error - already in scope on RHS (in scope due to LHS when false)
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if (o1 instanceof String s || o2 instanceof String s) {} //error - the same binding variable on LHS and RHS when true
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if (o1 instanceof String s || !(o2 instanceof String s)) {} //ok
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if (o1 instanceof String s ? o2 instanceof String s : true) {} //error - already in scope in the true section (due to condition when true)
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if (o1 instanceof String s ? true : o2 instanceof String s) {} //error - the same binding variable in condition when true and false section when true
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if (!(o1 instanceof String s) ? o2 instanceof String s : true) {} //error - the same binding variable in condition when false and true section when true
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if (args.length == 1 ? o2 instanceof String s : o2 instanceof String s) {} //error - the same binding variable in true section when true and false section when true
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if (o1 instanceof String s ? true : !(o2 instanceof String s)) {} //error - the same binding variable in condition when true and false section when false
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if (!(o1 instanceof String s) ? !(o2 instanceof String s) : true) {} //error - the same binding variable in condition when false and true section when false
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if (args.length == 1 ? !(o2 instanceof String s) : !(o2 instanceof String s)) {} //error - the same binding variable in true section when false and false section when false
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//verify that errors are reported to clashes in expression in non-conditional statements:
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boolean b = o1 instanceof String s && o2 instanceof String s;
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b = o1 instanceof String s && o2 instanceof String s;
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b &= o1 instanceof String s && o2 instanceof String s;
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assert o1 instanceof String s && o2 instanceof String s;
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testMethod(o1 instanceof String s && o2 instanceof String s, false);
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b = switch (args.length) { default -> o1 instanceof String s && o2 instanceof String s; };
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b = switch (args.length) { default -> { yield o1 instanceof String s && o2 instanceof String s; } };
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if (true) return o1 instanceof String s && o2 instanceof String s;
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//verify the bindings don't go through method invocation parameters or outside a lambda:
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b = ((VoidPredicate) () -> o1 instanceof String s).get() && s.isEmpty();
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testMethod(o1 instanceof String s, s.isEmpty());
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}
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static void testMethod(boolean b1, boolean b2) {}
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interface VoidPredicate {
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public boolean get();
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}
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}
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