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2026-04-08 21:25:17 +03:00
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java/expression/TripleExpression.java Normal file
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package expression;
import base.ExtendedRandom;
import base.Pair;
import base.Selector;
import base.TestCounter;
import expression.common.ExpressionKind;
import expression.common.Type;
import java.util.List;
/**
* Three-argument arithmetic expression over integers.
*
* @author Georgiy Korneev (kgeorgiy@kgeorgiy.info)
*/
@FunctionalInterface
@SuppressWarnings("ClassReferencesSubclass")
public interface TripleExpression extends ToMiniString {
int evaluate(int x, int y, int z);
// Tests follow. You may temporarily remove everything til the end.
Type<Integer> TYPE = new Type<>(a -> a, ExtendedRandom::nextInt, int.class);
ExpressionKind<TripleExpression, Integer> KIND = new ExpressionKind<>(
TYPE,
TripleExpression.class,
List.of(
Pair.of("x", new Variable("x")),
Pair.of("y", new Variable("y")),
Pair.of("z", new Variable("z"))
),
(expr, variables, values) ->
expr.evaluate(values.get(0), values.get(1), values.get(2))
);
@SuppressWarnings("PointlessArithmeticExpression")
static ExpressionTester<?, ?> tester(final TestCounter counter) {
final Variable vx = new Variable("x");
final Variable vy = new Variable("y");
final Variable vz = new Variable("z");
return new ExpressionTester<>(
counter,
KIND,
c -> (x, y, z) -> c,
(op, a, b) ->
(x, y, z) -> op.apply(a.evaluate(x, y, z), b.evaluate(x, y, z)),
Integer::sum,
(a, b) -> a - b,
(a, b) -> a * b,
(a, b) -> a / b
)
.basic("10", "10", (x, y, z) -> 10, c(10))
.basic("x", "x", (x, y, z) -> x, vx)
.basic("y", "y", (x, y, z) -> y, vy)
.basic("z", "z", (x, y, z) -> z, vz)
.basic("(x + 2)", "x + 2", (x, y, z) -> x + 2, new Add(vx, c(2)))
.basic(
"(2 - y)",
"2 - y",
(x, y, z) -> 2 - y,
new Subtract(c(2), vy)
)
.basic(
"(3 * z)",
"3 * z",
(x, y, z) -> 3 * z,
new Multiply(c(3), vz)
)
.basic(
"(x / -2)",
"x / -2",
(x, y, z) -> -x / 2,
new Divide(vx, c(-2))
)
.basic(
"((1 + 2) + 3)",
"1 + 2 + 3",
(x, y, z) -> 6,
new Add(new Add(c(1), c(2)), c(3))
)
.basic(
"(1 + (2 + 3))",
"1 + 2 + 3",
(x, y, z) -> 6,
new Add(c(1), new Add(c(2), c(3)))
)
.basic(
"((1 - 2) - 3)",
"1 - 2 - 3",
(x, y, z) -> -4,
new Subtract(new Subtract(c(1), c(2)), c(3))
)
.basic(
"(1 - (2 - 3))",
"1 - (2 - 3)",
(x, y, z) -> 2,
new Subtract(c(1), new Subtract(c(2), c(3)))
)
.basic(
"((1 * 2) * 3)",
"1 * 2 * 3",
(x, y, z) -> 6,
new Multiply(new Multiply(c(1), c(2)), c(3))
)
.basic(
"(1 * (2 * 3))",
"1 * 2 * 3",
(x, y, z) -> 6,
new Multiply(c(1), new Multiply(c(2), c(3)))
)
.basic(
"((10 / 2) / 3)",
"10 / 2 / 3",
(x, y, z) -> 10 / 2 / 3,
new Divide(new Divide(c(10), c(2)), c(3))
)
.basic(
"(10 / (3 / 2))",
"10 / (3 / 2)",
(x, y, z) -> 10,
new Divide(c(10), new Divide(c(3), c(2)))
)
.basic(
"((x * y) + ((z - 1) / 10))",
"x * y + (z - 1) / 10",
(x, y, z) -> x * y + (z - 1) / 10,
new Add(
new Multiply(vx, vy),
new Divide(new Subtract(vz, c(1)), c(10))
)
)
.basic("(x + y)", "x + y", (x, y, z) -> x + y, new Add(vx, vy))
.basic("(y + x)", "y + x", (x, y, z) -> y + x, new Add(vy, vx))
.advanced(
"(1 + 1)",
"1 + 1",
(x, y, z) -> 1 + 1,
new Add(c(1), c(1))
)
.advanced(
"(y - x)",
"y - x",
(x, y, z) -> y - x,
new Subtract(vy, vx)
)
.advanced(
"(2 * x)",
"2 * x",
(x, y, z) -> 2 * x,
new Multiply(c(2), vx)
)
.advanced(
"(2 / x)",
"2 / x",
(x, y, z) -> 2 / x,
new Divide(c(2), vx)
)
.advanced(
"(z + (1 + 1))",
"z + 1 + 1",
(x, y, z) -> z + 1 + 1,
new Add(vz, new Add(c(1), c(1)))
)
.advanced(
"(2 - (y - x))",
"2 - (y - x)",
(x, y, z) -> 2 - (y - x),
new Subtract(c(2), new Subtract(vy, vx))
)
.advanced(
"(z * (2 / x))",
"z * (2 / x)",
(x, y, z) -> z * (2 / x),
new Multiply(vz, new Divide(c(2), vx))
)
.advanced(
"(z / (y - x))",
"z / (y - x)",
(x, y, z) -> z / (y - x),
new Divide(vz, new Subtract(vy, vx))
)
.advanced(
"((2 * x) + y)",
"2 * x + y",
(x, y, z) -> 2 * x + y,
new Add(new Multiply(c(2), vx), vy)
)
.advanced(
"((y - x) - 2)",
"y - x - 2",
(x, y, z) -> y - x - 2,
new Subtract(new Subtract(vy, vx), c(2))
)
.advanced(
"((2 / x) * y)",
"2 / x * y",
(x, y, z) -> (2 / x) * y,
new Multiply(new Divide(c(2), vx), vy)
)
.advanced(
"((1 + 1) / x)",
"(1 + 1) / x",
(x, y, z) -> (1 + 1) / x,
new Divide(new Add(c(1), c(1)), vx)
)
.advanced(
"(1 + (2 * 3))",
"1 + 2 * 3",
(x, y, z) -> 7,
new Add(c(1), new Multiply(c(2), c(3)))
)
.advanced(
"(1 - (2 * 3))",
"1 - 2 * 3",
(x, y, z) -> -5,
new Subtract(c(1), new Multiply(c(2), c(3)))
)
.advanced(
"(1 + (2 / 3))",
"1 + 2 / 3",
(x, y, z) -> 1,
new Add(c(1), new Divide(c(2), c(3)))
)
.advanced(
"(1 - (2 / 3))",
"1 - 2 / 3",
(x, y, z) -> 1,
new Subtract(c(1), new Divide(c(2), c(3)))
)
.advanced(
"(2 + (z + (1 + 1)))",
"2 + z + 1 + 1",
(x, y, z) -> 2 + z + 1 + 1,
new Add(c(2), new Add(vz, new Add(c(1), c(1))))
)
.advanced(
"(1 - ((2 * x) + y))",
"1 - (2 * x + y)",
(x, y, z) -> 1 - (2 * x + y),
new Subtract(c(1), new Add(new Multiply(c(2), vx), vy))
)
.advanced(
"(1 * (z / (y - x)))",
"1 * (z / (y - x))",
(x, y, z) -> 1 * (z / (y - x)),
new Multiply(c(1), new Divide(vz, new Subtract(vy, vx)))
)
.advanced(
"(z / (z + (1 + 1)))",
"z / (z + 1 + 1)",
(x, y, z) -> z / (z + 1 + 1),
new Divide(vz, new Add(vz, new Add(c(1), c(1))))
)
.advanced(
"((2 * x) + (1 + 1))",
"2 * x + 1 + 1",
(x, y, z) -> 2 * x + 1 + 1,
new Add(new Multiply(c(2), vx), new Add(c(1), c(1)))
)
.advanced(
"((1 + 1) - (1 + 1))",
"1 + 1 - (1 + 1)",
(x, y, z) -> 1 + 1 - (1 + 1),
new Subtract(new Add(c(1), c(1)), new Add(c(1), c(1)))
)
.advanced(
"((y - x) * (2 / x))",
"(y - x) * (2 / x)",
(x, y, z) -> (y - x) * (2 / x),
new Multiply(new Subtract(vy, vx), new Divide(c(2), vx))
)
.advanced(
"((y - x) / (2 * x))",
"(y - x) / (2 * x)",
(x, y, z) -> (y - x) / (2 * x),
new Divide(new Subtract(vy, vx), new Multiply(c(2), vx))
)
.advanced(
"(((y - x) - 2) + 1)",
"y - x - 2 + 1",
(x, y, z) -> y - x - 2 + 1,
new Add(new Subtract(new Subtract(vy, vx), c(2)), c(1))
)
.advanced(
"(((2 * x) + y) - z)",
"2 * x + y - z",
(x, y, z) -> 2 * x + y - z,
new Subtract(new Add(new Multiply(c(2), vx), vy), vz)
)
.advanced(
"(((1 + 1) / x) * 2)",
"(1 + 1) / x * 2",
(x, y, z) -> ((1 + 1) / x) * 2,
new Multiply(new Divide(new Add(c(1), c(1)), vx), c(2))
)
.advanced(
"((z / (y - x)) / x)",
"z / (y - x) / x",
(x, y, z) -> z / (y - x) / x,
new Divide(new Divide(vz, new Subtract(vy, vx)), vx)
);
}
private static Const c(final Integer c) {
return TYPE.constant(c);
}
Selector SELECTOR = ExpressionTest.SELECTOR.variant(
"Triple",
ExpressionTest.v(TripleExpression::tester)
);
static void main(final String... args) {
TripleExpression.SELECTOR.main(args);
}
}