namespace CeresSharp.Advanced;

/// <summary>
/// Delegate for evaluation callback.
/// Called before evaluating cost functions to allow shared computation.
/// </summary>
/// <param name="numResiduals">Number of residuals.</param>
/// <param name="numParameterBlocks">Number of parameter blocks.</param>
/// <param name="parameterBlockSizes">Array of sizes for each parameter block (can be null).</param>
public delegate void EvaluationCallback(int numResiduals, int numParameterBlocks, int[]? parameterBlockSizes);