• For mutually recursive types

    Example

    // tree is 1 / 3 of node, 2 / 3 of leaf
    const tree: fc.Memo<Tree> = fc.memo(n => fc.oneof(node(n), leaf(), leaf()));
    const node: fc.Memo<Tree> = fc.memo(n => {
    if (n <= 1) return fc.record({ left: leaf(), right: leaf() });
    return fc.record({ left: tree(), right: tree() }); // tree() is equivalent to tree(n-1)
    });
    const leaf = fc.nat;

    Remarks

    Since 1.16.0

    Type Parameters

    • T

    Parameters

    • builder: ((maxDepth: number) => Arbitrary<T>)

      Arbitrary builder taken the maximal depth allowed as input (parameter n)

    Returns Memo<T>

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