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Diffstat (limited to 'runtime/syntax/testdir/input/java_lambda_expressions.java')
| -rw-r--r-- | runtime/syntax/testdir/input/java_lambda_expressions.java | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/runtime/syntax/testdir/input/java_lambda_expressions.java b/runtime/syntax/testdir/input/java_lambda_expressions.java new file mode 100644 index 0000000..75f5af4 --- /dev/null +++ b/runtime/syntax/testdir/input/java_lambda_expressions.java @@ -0,0 +1,154 @@ +// VIM_TEST_SETUP let g:java_highlight_functions = 'style' + + +import java.lang.annotation.ElementType; +import java.util.function.BinaryOperator; +import java.util.function.Function; +import java.util.function.Predicate; + +class LambdaExpressionsTests // JDK 21+. +{ + <I1, C1, C2, T1, T2, T3, Z1, Z2, Z3, S1, S2, S3> void test() + { // Schönfinkel's functions. + I<I1> i = x -> x; + C<C1, C2> c = x -> y -> x; + T<T1, T2, T3> t = f -> y -> x -> f.apply(x).apply(y); + Z<Z1, Z2, Z3> z = f -> g -> x -> f.apply(g.apply(x)); + S<S1, S2, S3> s = f -> g -> x -> f.apply(x) + .apply(g.apply(x)); + + I<I1> i01 = (var x) -> x; + I<I1> i02 = (@Taggable var x) -> x; + I<I1> i03 = (@Taggable @Taggable var x) -> x; + I<I1> i04 = (final var x) -> x; + I<I1> i05 = (@Taggable final var x) -> x; + I<I1> i06 = (@Taggable @Taggable final var x) -> x; + I<I1> i07 = (I1 x) -> x; + I<I1> i08 = (@Taggable I1 x) -> x; + I<I1> i09 = (@Taggable @Taggable I1 x) -> x; + I<I1> i10 = (final I1 x) -> x; + I<I1> i11 = (@Taggable final I1 x) -> x; + I<I1> i12 = (@Taggable @Taggable final I1 x) -> x; + + I<I1[]> ii01 = (I1... x) -> x; + I<I1[]> ii02 = (@Taggable I1... x) -> x; + I<I1[]> ii03 = (@Taggable @Taggable I1... x) -> x; + I<I1[]> ii04 = (final I1... x) -> x; + I<I1[]> ii05 = (@Taggable final I1... x) -> x; + I<I1[]> ii06 = (@Taggable @Taggable final I1... x) -> x; + + BinaryOperator<I1> leftConst01 = (var x, var y) -> x; + BinaryOperator<I1> leftConst02 = (@Taggable var x, + @Taggable var y) -> x; + BinaryOperator<I1> leftConst03 = (@Taggable @Taggable var + x, @Taggable @Taggable var y) -> x; + BinaryOperator<I1> leftConst04 = (final var x, + final var y) -> x; + BinaryOperator<I1> leftConst05 = (@Taggable final + var x, @Taggable final var y) -> x; + BinaryOperator<I1> leftConst06 = (@Taggable + @Taggable final var x, + @Taggable + @Taggable final var y) -> x; + BinaryOperator<I1> leftConst07 = (I1 x, I1 y) -> x; + BinaryOperator<I1> leftConst08 = (@Taggable I1 x, + @Taggable I1 y) -> x; + BinaryOperator<I1> leftConst09 = (@Taggable @Taggable I1 + x, @Taggable @Taggable I1 y) -> x; + BinaryOperator<I1> leftConst10 = (final I1 x, + final I1 y) -> x; + BinaryOperator<I1> leftConst11 = (@Taggable final + I1 x, @Taggable final I1 y) -> x; + BinaryOperator<I1> leftConst12 = (@Taggable + @Taggable final I1 x, + @Taggable + @Taggable final I1 y) -> x; + + Runnable noOp = () -> {}; + BinaryOperator<I1> leftConst = (x, y) -> x; + I<I1> id1 = (x) -> (x); + @SuppressWarnings("unchecked") I<I1> id2 = + ((I<I<I1>>) (I<?>) (Function<I1, + I1> x) -> x).apply(switch (0) { + case ((int) (byte) 1) -> (I1 x) -> x; + default -> (@Taggable I1 x) -> x; }); + C<C1, C2> const1 = (x) -> (y) -> (x); + C<C1, C2> const2 = switch(switch ("") { + case "->"->"(s)->(s)"; + default->"default"; }) { + case ("->")->(var x)->(var y)->(x); + default->(@Taggable var x)->(@Taggable var y) + ->(x); + }; + } + + @java.lang.annotation.Target(ElementType.PARAMETER) + @java.lang.annotation.Repeatable(Taggables.class) + @interface Taggable { String[] value() default ""; } + + @java.lang.annotation.Target(ElementType.PARAMETER) + @interface Taggables { Taggable[] value(); } + + interface I<A1> extends Function<A1, A1> { } + interface C<A1, A2> extends Function<A1, Function<A2, A1>> { } + interface T<A1, A2, A3> extends + Function<Function<A1, Function<A2, A3>>, + Function<A2, + Function<A1, A3>>> { } + interface Z<A1, A2, A3> extends Function<Function<A2, A3>, + Function<Function<A1, A2>, + Function<A1, A3>>> { } + interface S<A1, A2, A3> extends + Function<Function<A1, Function<A2, A3>>, + Function<Function<A1, A2>, + Function<A1, A3>>> { } + + static void echo(Object o) { System.out.println(o); } + + static { + enum Letters { OTHER, ALPHA, BETA } + + Letters other = Letters.OTHER; + + switch (other) { + case Letters alpha when Letters.ALPHA == alpha: + { echo(alpha); break; } + case Letters beta when Letters.BETA == beta: + { echo(beta); break; } + default: { echo(other); } + } + + echo(switch (other) { + case Letters alpha when Letters.ALPHA == alpha + -> alpha; + case Letters beta when Letters.BETA == beta + -> beta; + default -> other; + }); + + switch (null) { + case String str when !"<empty>".equals(switch (str) { + case String str_ when + Predicate.<String>not(text -> + !text.isEmpty()) + .test(str_) + -> "<empty>"; + case String str_ -> str_; + }): { echo(str); break; } + case null: default: { echo("Other"); } + }; + + echo(switch (null) { + case String str when !"<empty>".equals( + switch (str) { + case String str_ when + Predicate.<String>not(text -> + !text.isEmpty()) + .test(str_) + -> "<empty>"; + case String str_ -> str_; + }) -> str; + case null, default -> "Other"; + }); + } +} |