/// <summary>
/// Execute the expression list.
/// </summary>
/// <param name="c"></param>
/// <returns></returns>
public object Evaluate(IScopeContext c)
{
var newcontext = new ScopeContext(c);
object result = null;
Action <object> saver = a => { result = a; };
newcontext.AddExpressionStatementEvaluationCallback(saver);
try
{
foreach (var s in Statements)
{
s.Evaluate(newcontext);
}
return(result);
}
finally
{
c.RemoveExpressionStatementEvaluationCallback(saver);
}
}
/// <summary>
/// Parse and evaluate a single line of script. Done in place, and immediately, and in the
/// global scope.
/// </summary>
/// <param name="scriptline">text to execute</param>
/// <returns>Whatever the value of the script line is</returns>
public static object eval(IScopeContext c, string scriptline)
{
var statements = Grammar.ModuleParser.End().Parse(scriptline);
object result = null;
Action <object> saver = o => result = o;
c.AddExpressionStatementEvaluationCallback(saver);
try
{
foreach (var s in statements)
{
s.Evaluate(c);
}
}
finally
{
c.RemoveExpressionStatementEvaluationCallback(saver);
}
return(result);
}