318 lines
10 KiB
Java
318 lines
10 KiB
Java
package expression;
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import base.ExtendedRandom;
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import base.Pair;
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import base.Selector;
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import base.TestCounter;
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import expression.common.ExpressionKind;
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import expression.common.Type;
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import java.util.List;
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/**
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* Three-argument arithmetic expression over integers.
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*
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* @author Georgiy Korneev (kgeorgiy@kgeorgiy.info)
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*/
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@FunctionalInterface
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@SuppressWarnings("ClassReferencesSubclass")
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public interface TripleExpression extends ToMiniString {
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int evaluate(int x, int y, int z);
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// Tests follow. You may temporarily remove everything til the end.
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Type<Integer> TYPE = new Type<>(a -> a, ExtendedRandom::nextInt, int.class);
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ExpressionKind<TripleExpression, Integer> KIND = new ExpressionKind<>(
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TYPE,
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TripleExpression.class,
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List.of(
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Pair.of("x", new Variable("x")),
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Pair.of("y", new Variable("y")),
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Pair.of("z", new Variable("z"))
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),
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(expr, variables, values) ->
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expr.evaluate(values.get(0), values.get(1), values.get(2))
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);
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@SuppressWarnings("PointlessArithmeticExpression")
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static ExpressionTester<?, ?> tester(final TestCounter counter) {
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final Variable vx = new Variable("x");
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final Variable vy = new Variable("y");
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final Variable vz = new Variable("z");
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return new ExpressionTester<>(
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counter,
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KIND,
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c -> (x, y, z) -> c,
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(op, a, b) ->
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(x, y, z) -> op.apply(a.evaluate(x, y, z), b.evaluate(x, y, z)),
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Integer::sum,
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(a, b) -> a - b,
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(a, b) -> a * b,
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(a, b) -> a / b
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)
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.basic("10", "10", (x, y, z) -> 10, c(10))
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.basic("x", "x", (x, y, z) -> x, vx)
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.basic("y", "y", (x, y, z) -> y, vy)
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.basic("z", "z", (x, y, z) -> z, vz)
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.basic("(x + 2)", "x + 2", (x, y, z) -> x + 2, new Add(vx, c(2)))
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.basic(
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"(2 - y)",
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"2 - y",
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(x, y, z) -> 2 - y,
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new Subtract(c(2), vy)
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)
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.basic(
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"(3 * z)",
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"3 * z",
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(x, y, z) -> 3 * z,
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new Multiply(c(3), vz)
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)
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.basic(
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"(x / -2)",
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"x / -2",
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(x, y, z) -> -x / 2,
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new Divide(vx, c(-2))
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)
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.basic(
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"((1 + 2) + 3)",
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"1 + 2 + 3",
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(x, y, z) -> 6,
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new Add(new Add(c(1), c(2)), c(3))
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)
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.basic(
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"(1 + (2 + 3))",
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"1 + 2 + 3",
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(x, y, z) -> 6,
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new Add(c(1), new Add(c(2), c(3)))
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)
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.basic(
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"((1 - 2) - 3)",
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"1 - 2 - 3",
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(x, y, z) -> -4,
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new Subtract(new Subtract(c(1), c(2)), c(3))
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)
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.basic(
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"(1 - (2 - 3))",
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"1 - (2 - 3)",
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(x, y, z) -> 2,
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new Subtract(c(1), new Subtract(c(2), c(3)))
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)
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.basic(
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"((1 * 2) * 3)",
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"1 * 2 * 3",
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(x, y, z) -> 6,
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new Multiply(new Multiply(c(1), c(2)), c(3))
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)
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.basic(
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"(1 * (2 * 3))",
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"1 * 2 * 3",
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(x, y, z) -> 6,
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new Multiply(c(1), new Multiply(c(2), c(3)))
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)
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.basic(
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"((10 / 2) / 3)",
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"10 / 2 / 3",
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(x, y, z) -> 10 / 2 / 3,
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new Divide(new Divide(c(10), c(2)), c(3))
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)
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.basic(
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"(10 / (3 / 2))",
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"10 / (3 / 2)",
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(x, y, z) -> 10,
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new Divide(c(10), new Divide(c(3), c(2)))
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)
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.basic(
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"((x * y) + ((z - 1) / 10))",
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"x * y + (z - 1) / 10",
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(x, y, z) -> x * y + (z - 1) / 10,
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new Add(
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new Multiply(vx, vy),
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new Divide(new Subtract(vz, c(1)), c(10))
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)
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)
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.basic("(x + y)", "x + y", (x, y, z) -> x + y, new Add(vx, vy))
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.basic("(y + x)", "y + x", (x, y, z) -> y + x, new Add(vy, vx))
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.advanced(
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"(1 + 1)",
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"1 + 1",
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(x, y, z) -> 1 + 1,
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new Add(c(1), c(1))
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)
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.advanced(
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"(y - x)",
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"y - x",
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(x, y, z) -> y - x,
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new Subtract(vy, vx)
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)
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.advanced(
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"(2 * x)",
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"2 * x",
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(x, y, z) -> 2 * x,
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new Multiply(c(2), vx)
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)
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.advanced(
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"(2 / x)",
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"2 / x",
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(x, y, z) -> 2 / x,
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new Divide(c(2), vx)
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)
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.advanced(
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"(z + (1 + 1))",
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"z + 1 + 1",
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(x, y, z) -> z + 1 + 1,
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new Add(vz, new Add(c(1), c(1)))
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)
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.advanced(
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"(2 - (y - x))",
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"2 - (y - x)",
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(x, y, z) -> 2 - (y - x),
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new Subtract(c(2), new Subtract(vy, vx))
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)
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.advanced(
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"(z * (2 / x))",
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"z * (2 / x)",
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(x, y, z) -> z * (2 / x),
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new Multiply(vz, new Divide(c(2), vx))
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)
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.advanced(
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"(z / (y - x))",
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"z / (y - x)",
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(x, y, z) -> z / (y - x),
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new Divide(vz, new Subtract(vy, vx))
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)
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.advanced(
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"((2 * x) + y)",
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"2 * x + y",
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(x, y, z) -> 2 * x + y,
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new Add(new Multiply(c(2), vx), vy)
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)
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.advanced(
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"((y - x) - 2)",
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"y - x - 2",
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(x, y, z) -> y - x - 2,
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new Subtract(new Subtract(vy, vx), c(2))
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)
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.advanced(
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"((2 / x) * y)",
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"2 / x * y",
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(x, y, z) -> (2 / x) * y,
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new Multiply(new Divide(c(2), vx), vy)
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)
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.advanced(
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"((1 + 1) / x)",
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"(1 + 1) / x",
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(x, y, z) -> (1 + 1) / x,
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new Divide(new Add(c(1), c(1)), vx)
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)
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.advanced(
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"(1 + (2 * 3))",
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"1 + 2 * 3",
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(x, y, z) -> 7,
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new Add(c(1), new Multiply(c(2), c(3)))
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)
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.advanced(
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"(1 - (2 * 3))",
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"1 - 2 * 3",
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(x, y, z) -> -5,
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new Subtract(c(1), new Multiply(c(2), c(3)))
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)
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.advanced(
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"(1 + (2 / 3))",
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"1 + 2 / 3",
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(x, y, z) -> 1,
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new Add(c(1), new Divide(c(2), c(3)))
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)
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.advanced(
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"(1 - (2 / 3))",
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"1 - 2 / 3",
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(x, y, z) -> 1,
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new Subtract(c(1), new Divide(c(2), c(3)))
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)
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.advanced(
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"(2 + (z + (1 + 1)))",
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"2 + z + 1 + 1",
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(x, y, z) -> 2 + z + 1 + 1,
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new Add(c(2), new Add(vz, new Add(c(1), c(1))))
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)
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.advanced(
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"(1 - ((2 * x) + y))",
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"1 - (2 * x + y)",
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(x, y, z) -> 1 - (2 * x + y),
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new Subtract(c(1), new Add(new Multiply(c(2), vx), vy))
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)
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.advanced(
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"(1 * (z / (y - x)))",
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"1 * (z / (y - x))",
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(x, y, z) -> 1 * (z / (y - x)),
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new Multiply(c(1), new Divide(vz, new Subtract(vy, vx)))
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)
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.advanced(
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"(z / (z + (1 + 1)))",
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"z / (z + 1 + 1)",
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(x, y, z) -> z / (z + 1 + 1),
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new Divide(vz, new Add(vz, new Add(c(1), c(1))))
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)
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.advanced(
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"((2 * x) + (1 + 1))",
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"2 * x + 1 + 1",
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(x, y, z) -> 2 * x + 1 + 1,
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new Add(new Multiply(c(2), vx), new Add(c(1), c(1)))
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)
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.advanced(
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"((1 + 1) - (1 + 1))",
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"1 + 1 - (1 + 1)",
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(x, y, z) -> 1 + 1 - (1 + 1),
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new Subtract(new Add(c(1), c(1)), new Add(c(1), c(1)))
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)
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.advanced(
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"((y - x) * (2 / x))",
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"(y - x) * (2 / x)",
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(x, y, z) -> (y - x) * (2 / x),
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new Multiply(new Subtract(vy, vx), new Divide(c(2), vx))
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)
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.advanced(
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"((y - x) / (2 * x))",
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"(y - x) / (2 * x)",
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(x, y, z) -> (y - x) / (2 * x),
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new Divide(new Subtract(vy, vx), new Multiply(c(2), vx))
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)
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.advanced(
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"(((y - x) - 2) + 1)",
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"y - x - 2 + 1",
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(x, y, z) -> y - x - 2 + 1,
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new Add(new Subtract(new Subtract(vy, vx), c(2)), c(1))
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)
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.advanced(
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"(((2 * x) + y) - z)",
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"2 * x + y - z",
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(x, y, z) -> 2 * x + y - z,
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new Subtract(new Add(new Multiply(c(2), vx), vy), vz)
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)
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.advanced(
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"(((1 + 1) / x) * 2)",
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"(1 + 1) / x * 2",
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(x, y, z) -> ((1 + 1) / x) * 2,
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new Multiply(new Divide(new Add(c(1), c(1)), vx), c(2))
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)
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.advanced(
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"((z / (y - x)) / x)",
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"z / (y - x) / x",
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(x, y, z) -> z / (y - x) / x,
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new Divide(new Divide(vz, new Subtract(vy, vx)), vx)
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);
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}
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private static Const c(final Integer c) {
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return TYPE.constant(c);
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}
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Selector SELECTOR = ExpressionTest.SELECTOR.variant(
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"Triple",
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ExpressionTest.v(TripleExpression::tester)
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);
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static void main(final String... args) {
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TripleExpression.SELECTOR.main(args);
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}
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}
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