//--- Class Methods ---
public static void Generate(DekiScriptGenerator expr, DekiScriptEval callback, DekiScriptExpressionEvaluationState state)
{
// set counter variable
int counter = 0;
var previousCounter = state.Env.Vars[DekiScriptRuntime.COUNT_ID];
try {
state.Env.Vars.Add(DekiScriptRuntime.COUNT_ID, DekiScriptExpression.Constant(counter));
expr.VisitWith(Instance, new DekiScriptGeneratorEvaluationState(innerEnv => {
callback(innerEnv);
state.Env.Vars.Add(DekiScriptRuntime.COUNT_ID, DekiScriptExpression.Constant(++counter));
}, state));
} finally {
state.Env.Vars.Add(DekiScriptRuntime.COUNT_ID, previousCounter);
}
}
public virtual DekiScriptLiteral Evaluate(DekiScriptExpression expr, DekiScriptEvalMode mode, DekiScriptEnv env) {
DekiScriptExpressionEvaluationState state = new DekiScriptExpressionEvaluationState(mode, env, this);
try {
return state.Pop(expr.VisitWith(DekiScriptExpressionEvaluation.Instance, state));
} catch(DekiScriptReturnException e) {
state.Push(e.Value);
return state.PopAll();
}
}
//--- Constructors ---
public DekiScriptGeneratorEvaluationState(DekiScriptEval callback, DekiScriptExpressionEvaluationState state)
{
this.Callback = callback;
this.State = state;
}