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Add Vector.toHash overload #1

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Add Vector.toHash overload #1

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20 changes: 20 additions & 0 deletions sel/math/vector.d
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Original file line number Diff line number Diff line change
Expand Up @@ -290,6 +290,13 @@ struct Vector(T, char[] c) if(c.length > 1 && areValidCoordinates(c)) {
return "Vector!(" ~ T.stringof ~ ", \"" ~ coordinates.idup ~ "\")(" ~ cs.join(", ") ~ ")";
}

public size_t toHash() const @safe pure nothrow {
size_t hash;
foreach (ref value; array) {
hash = hashOf(value, hash);
}
return hash;
}
}

/// ditto
Expand Down Expand Up @@ -522,4 +529,17 @@ unittest {
aa[Vector2!int(1, 2)] = 4;
assert(aa[Vector2!int(1, 2)] == 4);

Vector3!int[] hashes = [
Vector3!int(0, 0, 0),
Vector3!int(1, 0, 0),
Vector3!int(0, 1, 0),
Vector3!int(0, 0, 1),
Vector3!int(1, 0, 1)
];
foreach (hash; hashes)
assert(hash.toHash != 0);

foreach (a; hashes)
foreach (b; hashes)
assert(a == b || a.toHash != b.toHash);
}