/// <summary>
/// Converts a <see cref="string"/> pattern to <see cref="Expression"/>.
/// </summary>
/// <param name="expression">The <see cref="string"/> pattern.</param>
/// <returns>The <see cref="Expression"/> lambda expression.</returns>
/// <exception cref="KeyNotFoundException">When the <see cref="ExpressionNodeType"/> is not implemented.</exception>
public static Expression <Func <T, TResult> > Create(string expression)
{
var eb = new ExpressionBuilder <T, TResult>();
var root = ExpressionString.BuildTree(expression).Root;
return(root == null ? null : eb.Lambda(eb.BuildExpression(root)));
}
/// <summary>
/// Converts a <see cref="String"/> expression to <see cref="ExpressionTree"/>.
/// </summary>
/// <param name="value">The <see cref="String"/> expression to parse.</param>
/// <returns>The <see cref="ExpressionTree"/> parsed.</returns>
public static ExpressionTree BuildTree(string value)
{
ExpressionTree tree;
var fsp = new ExpressionString();
tree = fsp.ParseExpressionString(value);
return(tree);
}