69 lines
2.5 KiB
Java
69 lines
2.5 KiB
Java
package expression.parser;
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import expression.ToMiniString;
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import expression.common.ExpressionKind;
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import expression.common.Reason;
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import java.util.function.*;
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/**
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* @author Georgiy Korneev (kgeorgiy@kgeorgiy.info)
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*/
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public final class Operations {
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// === Base
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public static final Operation NEGATE = unary("-", 1, a -> -a);
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@SuppressWarnings("Convert2MethodRef")
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public static final Operation ADD = binary("+", 1600, (a, b) -> a + b);
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public static final Operation SUBTRACT = binary("-", 1602, (a, b) -> a - b);
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public static final Operation MULTIPLY = binary("*", 2001, (a, b) -> a * b);
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public static final Operation DIVIDE = binary("/", 2002, (a, b) -> b == 0 ? Reason.DBZ.error() : a / b);
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// === 3637
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public static final Operation ABS = unary("‖", "‖", Math::abs);
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public static final Operation CUBE = unary("³", 2, (a, c) -> c.applyAsInt(a * a) * a);
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public static final Operation CBRT = unary("∛", 1, a -> (long) Math.cbrt(a));
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// === 3839
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private static final Reason NEGATIVE_SQRT = new Reason("Square root of negative value");
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public static final Operation SQUARE = unary("²", 2, a -> a * a);
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public static final Operation SQRT = unary("√", 1, NEGATIVE_SQRT.less(0, a -> (long) Math.sqrt(a)));
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// === Common
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private Operations() {
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}
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public static Operation unary(final String name, final int priority, final LongUnaryOperator op) {
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return unary(name, priority, (a, c) -> op.applyAsLong(a));
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}
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public static Operation unary(final String left, final String right, final LongUnaryOperator op) {
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return unary(left, right, (a, c) -> op.applyAsLong(a));
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}
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public static Operation unary(final String name, final int priority, final BiFunction<Long, LongToIntFunction, Long> op) {
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return tests -> tests.unary(name, priority, op);
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}
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public static Operation unary(final String left, final String right, final BiFunction<Long, LongToIntFunction, Long> op) {
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return tests -> tests.unary(left, right, op);
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}
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public static Operation binary(final String name, final int priority, final LongBinaryOperator op) {
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return tests -> tests.binary(name, priority, op);
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}
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public static <E extends ToMiniString, C> Operation kind(
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final ExpressionKind<E, C> kind,
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final ParserTestSet.Parser<E> parser
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) {
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return factory -> factory.kind(kind, parser);
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}
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@FunctionalInterface
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public interface Operation extends Consumer<ParserTester> {}
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}
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