public override void Evaluate(IScriptContext context)
{
bool condBool;
object result = RuntimeHost.NullValue;
init.Evaluate(context);
cond.Evaluate(context);
condBool = context.Result == null ? true : (bool)context.Result;
while (condBool)
{
statement.Evaluate(context);
result = context.Result;
if (context.IsBreak() || context.IsReturn())
{
context.SetBreak(false);
break;
}
if (context.IsContinue())
{
context.SetContinue(false);
}
next.Evaluate(context);
cond.Evaluate(context);
condBool = context.Result == null ? true : (bool)context.Result;
}
context.Result = result;
}
//TODO: reorganize switch
public override void Evaluate(IScriptContext context)
{
switch (operation)
{
case "break":
if (context.Result == null)
{
context.Result = RuntimeHost.NullValue;
}
context.SetBreak(true);
break;
case "continue":
if (context.Result == null)
{
context.Result = RuntimeHost.NullValue;
}
context.SetContinue(true);
break;
case "return":
expression.Evaluate(context);
context.SetReturn(true);
break;
case "throw":
expression.Evaluate(context);
throw (Exception)context.Result;
default:
throw new ScriptException("This should never happen");
}
}
public override void Evaluate(IScriptContext context)
{
name.Evaluate(context);
context.CreateScope(RuntimeHost.ScopeFactory.Create(ScopeTypes.Using, context.Scope, context.Result));
statement.Evaluate(context);
context.RemoveLocalScope();
}
public object Invoke(IScriptContext context, object[] args)
{
activeContext = context;
object result = RuntimeHost.NullValue;
INotifyingScope functionScope = (INotifyingScope)RuntimeHost.ScopeFactory.Create(ScopeTypes.Function, context.Scope, context);
context.CreateScope(functionScope);
try
{
if (Parameters != null)
{
context.Result = args;
Parameters.Evaluate(context);
}
functionScope.BeforeSetItem += ScopeBeforeSetItem;
if (Contract != null)
{
functionScope.AfterSetItem += CheckContractInvariant;
Contract.CheckPre(context);
Contract.CheckInv(context);
}
context.Result = RuntimeHost.NullValue;
Body.Evaluate(context);
result = context.Result;
if (Contract != null)
{
functionScope.AfterSetItem -= CheckContractInvariant;
Contract.CheckInv(context);
Contract.CheckPost(context);
}
}
finally
{
context.RemoveLocalScope();
context.SetBreak(false);
context.SetContinue(false);
context.SetReturn(false);
context.Result = result;
functionScope.BeforeSetItem -= ScopeBeforeSetItem;
activeContext = null;
}
return(result);
}
/// <summary>
/// Evaluates script
/// </summary>
/// <param name="Context">ScriptContext</param>
public virtual void Evaluate(IScriptContext context)
{
if (ChildNodes.Count > 0)
{
int index = 0;
while (index < ChildNodes.Count)
{
ScriptAst node = ChildNodes[index] as ScriptAst;
if (node != null)
{
node.Evaluate(context);
}
index++;
}
}
}
//TODO: Implement Breaking, Returning, etc. here
public override void Evaluate(IScriptContext context)
{
if (ChildNodes.Count == 0)
{
return;
}
int index = 0;
while (index < ChildNodes.Count)
{
ScriptAst node = (ScriptAst)ChildNodes[index];
node.Evaluate(context);
if (context.IsBreak() || context.IsReturn() || context.IsContinue())
{
break;
}
index++;
}
}
protected static bool CheckCondition(ScriptAst cond, IScriptContext context)
{
cond.Evaluate(context);
return((bool)context.Result);
}
public object Invoke(IScriptContext context, object[] args)
{
metaProg.Evaluate(context);
return(context.Result);
}
protected static bool CheckCondition(ScriptAst cond, IScriptContext context)
{
cond.Evaluate(context);
return (bool)context.Result;
}