private static Node ResolveIdentifier(Node node, Env env)
{
if ("True".Equals(node.Content))
{
return(Node.TRUE);
}
if ("False".Equals(node.Content))
{
return(Node.FALSE);
}
if (double.TryParse(node.Content.ToString(), out double result))
{
return(node);
}
if (env != null && env.TryGetValue(node.Content.ToString(), out Node envNode))
{
return(envNode);
}
string errorMsg = "Identifier not found in env: " + node.Content;
return(new Node(StdNodeTypes.Error, errorMsg));
}
public bool TryGetValue(string content, out Node envNode)
{
if (localEnv.TryGetValue(content, out Node localEnvNode))
{
envNode = localEnvNode;
return(true);
}
if (parentEnv == null)
{
envNode = null;
return(false);
}
bool success = parentEnv.TryGetValue(content, out Node parentEnvNode);
envNode = parentEnvNode;
return(success);
}
private static int ReplaceMacros(Env env)
{
int replaceCount = 0;
foreach (string key in env.GetEnvKeys())
{
if (env.TryGetValue(key, out Node node))
{
Node newNode = ExpandMacros(node, env, out int expansionsCount);
if (newNode != node)
{
env.Add(key, newNode);
}
replaceCount += expansionsCount;
}
}
return(replaceCount);
}
private static Node TryGetMacro(string functionName, Env env)
{
if (functionName == null)
{
return(null);
}
if (!env.TryGetValue(functionName, out Node envNode))
{
return(null);
}
if (!StdNodeTypes.Macro.Equals(envNode.NodeType))
{
return(null);
}
return(envNode);
}