public static HashSet <Expression> Nominate(Expression expression)
{
ExpressionNominator n = new ExpressionNominator();
n.Visit(expression);
return(n.candidates);
}
/// <summary>
/// Performs evaluation & replacement of independent sub-trees
/// </summary>
/// <param name="expression">The root of the expression tree.</param>
/// <param name="fnCanBeEvaluated">A function that decides whether a given expression node can be part of the local function.</param>
/// <returns>A new tree with sub-trees evaluated and replaced.</returns>
public static Expression PartialEval(Expression exp)
{
if (exp.NodeType == ExpressionType.Constant)
{
return(exp);
}
HashSet <Expression> candidates = ExpressionNominator.Nominate(exp);
return(new ExpressionEvaluator(candidates).Visit(exp) !);
}
/// <summary>
/// Performs evaluation & replacement of independent sub-trees
/// </summary>
/// <param name="expression">The root of the expression tree.</param>
/// <param name="fnCanBeEvaluated">A function that decides whether a given expression node can be part of the local function.</param>
/// <returns>A new tree with sub-trees evaluated and replaced.</returns>
public static Expression PartialEval(Expression exp)
{
return(new MetaEvaluator {
candidates = ExpressionNominator.Nominate(exp)
}.Visit(exp));
}