/// <summary>
/// Evalutates an expression supplied as a <see cref="System.String"/> without persistence of context.
/// </summary>
/// <param name="expression">A <see cref="System.String"/> expression to evaluate.</param>
/// <returns>An <see cref="System.Object"/> that represents the result of evaluation.</returns>
public static object It(string expression)
{
var tree = SyntaxTree.ParseString(expression);
var global = new Scope();
BuiltIn.IntializeScope(global);
var visitor = Visitor.Create(global);
tree.Root.Accept(visitor);
return(visitor.Result);
}
/// <summary>
/// Creates an instance of <see cref="ExpressionEngine.Context"/>.
/// </summary>
public Context()
{
_global = new Scope();
BuiltIn.IntializeScope(_global);
}