/// <summary>
/// Obtains a key path that exists at the same level, but has it's final index in the path decremented.
/// </summary>
/// <returns>Returns a key path that exists at the same level, but has it's final index in the path decremented.</returns>
public KeyPath Previous()
{
// Verify we have indices
if (Indices.Length == 0)
{
throw new ArgumentException("Failed to decrement key path because the current key path has no indices.");
}
// We'll want to copy our indices, and decrement the last index.
uint[] clonedIndices = (uint[])Indices.Clone();
// Verify our index isn't 0 (without hardened bit)
uint baseIndex = (clonedIndices[clonedIndices.Length - 1] & ~HARDENED_MASK);
if (baseIndex == 0)
{
throw new ArgumentException("Failed to decrement key path because the current key path's last index is zero, and decrementing it would underflow and invert the hardened flag.");
}
// Increment our final index
clonedIndices[clonedIndices.Length - 1]--;
// Return a new key path with our copied indices
return(new KeyPath(clonedIndices));
}
public override Expression Clone()
{
return(new ArrayIndexerExpression(Target.Clone(), instructions)
{
Indices = Indices.Clone(), IsSimpleStore = this.IsSimpleStore
});
}
/// <summary>
/// Obtains a key path that exists at the same level, but has it's final index in the path incremented.
/// </summary>
/// <returns>Returns a key path that exists at the same level, but has it's final index in the path incremented.</returns>
public KeyPath Next()
{
// Verify we have indices
if (Indices.Length == 0)
{
throw new ArgumentException("Failed to increment key path because the current key path has no indices.");
}
// We'll want to copy our indices, and increment the last index.
uint[] clonedIndices = (uint[])Indices.Clone();
// Increment our final index
clonedIndices[clonedIndices.Length]++;
// Return a new key path with our copied indices
return(new KeyPath(clonedIndices));
}
/// <summary>
/// Gets a new mesh instance with vertices and indices clone.
/// </summary>
/// <returns></returns>
public Mesh <V> Clone()
{
V[] newVertices = Vertices.Clone() as V[];
int[] newIndices = Indices.Clone() as int[];
return(new Mesh <V>(newVertices, newIndices, this.Topology, Slices));
}
public override Expression Clone()
{
DynamicIndexerExpression result = new DynamicIndexerExpression(Target.Clone(), Indices.Clone(), ExpressionType, this.instructions);
return(result);
}
