public override Node Evaluate(Env env)
{
if(Evaluated) return this;
try
{
env = env ?? new Env();
env.Frames.Push(this);
NodeHelper.ExpandNodes<Import>(env, Rules);
env.Frames.Pop();
var clone = new Root(new NodeList(Rules), Error, OriginalRuleset);
clone = DoVisiting(clone, env, VisitorPluginType.BeforeEvaluation);
clone.ReducedFrom<Root>(this);
clone.EvaluateRules(env);
clone.Evaluated = true;
clone = DoVisiting(clone, env, VisitorPluginType.AfterEvaluation);
return clone;
}
catch (ParsingException e)
{
throw Error(e);
}
}
public override Node Evaluate(Env env)
{
env = env ?? new Env();
NodeHelper.ExpandNodes<Import>(env, this.Rules);
Root clone = new Root(new NodeList(Rules), Error, OriginalRuleset).ReducedFrom<Root>(this);
clone.EvaluateRules(env);
return clone;
}
private Root DoVisiting(Root node, Env env, VisitorPluginType pluginType)
{
return env.VisitorPlugins
.Where(p => p.AppliesTo == pluginType)
.Aggregate(node, (current, plugin) =>
{
try
{
plugin.OnPreVisiting(env);
Root r = plugin.Apply(current);
plugin.OnPostVisiting(env);
return r;
}
catch (Exception ex)
{
string message = string.Format("Plugin '{0}' failed during visiting with error '{1}'", plugin.GetName(), ex.Message);
throw new ParserException(message, ex);
}
});
}
public Ruleset Parse(string input, string fileName, Env env)
{
Ruleset root = null;
FileName = fileName;
try
{
Tokenizer.SetupInput(input, fileName);
var parsers = new CartoParsers(NodeProvider, env);
root = new Root(parsers.Primary(this), e => GenerateParserError(e));
}
catch (ParsingException e)
{
throw GenerateParserError(e);
}
if (!Tokenizer.HasCompletedParsing())
throw GenerateParserError(new ParsingException("Content after finishing parsing (missing opening bracket?)", Tokenizer.GetNodeLocation(Tokenizer.Location.Index)));
return root;
}