public override int GetMaximumSubtreeCount(ISymbol symbol)
{
if (grammar.ContainsSymbol(symbol))
{
return(grammar.GetMaximumSubtreeCount(symbol));
}
return(base.GetMaximumSubtreeCount(symbol));
}
/// <summary>
/// Randomly determines an arity for the given node.
/// </summary>
/// <param name="random">random number generator</param>
/// <param name="node">node, for which a random arity is determined</param>
/// <param name="grammar">symbolic expression grammar to use</param>
/// <returns>random arity in the interval [minArity, maxArity]</returns>
protected int SampleArity(IRandom random,
ISymbolicExpressionTreeNode node,
ISymbolicExpressionGrammar grammar)
{
int minArity = grammar.GetMinimumSubtreeCount(node.Symbol);
int maxArity = grammar.GetMaximumSubtreeCount(node.Symbol);
if (minArity == maxArity)
{
return(minArity);
}
return(random.Next(minArity, maxArity));
}
public int GetMaximumSubtreeCount(ISymbol symbol)
{
return(grammar.GetMaximumSubtreeCount(symbol));
}
/// <summary>
/// Randomly determines an arity for the given node.
/// </summary>
/// <param name="random">random number generator</param>
/// <param name="node">node, for which a random arity is determined</param>
/// <param name="grammar">symbolic expression grammar to use</param>
/// <returns>random arity in the interval [minArity, maxArity]</returns>
protected int SampleArity(IRandom random,
ISymbolicExpressionTreeNode node,
ISymbolicExpressionGrammar grammar) {
int minArity = grammar.GetMinimumSubtreeCount(node.Symbol);
int maxArity = grammar.GetMaximumSubtreeCount(node.Symbol);
if (minArity == maxArity) {
return minArity;
}
return random.Next(minArity, maxArity);
}