public void RegisterExprEvalIgnoredByParent()
{
var c = new ScopeContext(new RootContext());
object r = null;
Action <object> saver = o => r = o;
var es = new PlotLingoLib.Statements.ExpressionStatement(new StringValue("hi"));
c.AddExpressionStatementEvaluationCallback(saver);
es.Evaluate(c.Parent);
Assert.IsNull(r, "result of running");
}
public void RegisterExprEvalWorksInScope()
{
var c = new ScopeContext(new RootContext());
object r = null;
Action <object> saver = o => r = o;
var es = new PlotLingoLib.Statements.ExpressionStatement(new StringValue("hi"));
c.AddExpressionStatementEvaluationCallback(saver);
es.Evaluate(c);
Assert.AreEqual("hi", r, "result of running");
}
/// <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);
}
}
