public DekiScriptLiteral Visit(DekiScriptVar expr, DekiScriptEnv env)
{
if (expr.Name.EqualsInvariant(DekiScriptRuntime.ENV_ID))
{
DekiScriptMap vars = new DekiScriptMap();
vars.AddRange(env.Globals);
vars.AddRange(env.Locals);
return(vars);
}
// check if variable exists
DekiScriptLiteral result = env[expr.Name];
if (result == null)
{
throw new DekiScriptUndefinedNameException(expr.Line, expr.Column, expr.Name);
}
result = DekiScriptRuntime.EvaluateProperty(result, env);
return(result);
}
public DekiScriptExpression Visit(DekiScriptVar expr, DekiScriptExpressionEvaluationState state)
{
if (expr.Name.EqualsInvariant(DekiScriptRuntime.ENV_ID))
{
return(expr);
}
// check if variable exists
DekiScriptLiteral result;
if (!state.Env.Vars.TryGetValue(expr.Name, out result) && !state.Env.Vars.TryGetValue(expr.Name, out result))
{
return(expr);
}
// check if variable is defined, but the value is unknown
if (result is DekiScriptUnknown)
{
return(expr);
}
return(result);
}
public DekiScriptOutputBuffer.Range Visit(DekiScriptVar expr, DekiScriptExpressionEvaluationState state)
{
if (expr.Name.EqualsInvariant(DekiScriptRuntime.ENV_ID))
{
DekiScriptMap vars = new DekiScriptMap();
vars.AddRange(state.Env.Vars);
return(state.Push(vars));
}
// check if variable exists
DekiScriptLiteral result;
if (!state.Env.Vars.TryGetValue(expr.Name, out result))
{
result = state.Runtime.ResolveMissingName(expr.Name);
}
if (result == null)
{
throw new DekiScriptUndefinedNameException(expr.Location, expr.Name);
}
result = state.Runtime.EvaluateProperty(expr.Location, result, state.Env);
return(state.Push(result));
}
