UserDefinedPart.cs

using System;
using System.Collections.Generic;
using System.Text;
 
namespace Waher.Content.Asn1.Model.Macro
{
    public class UserDefinedPart : UserDefinedItem
    {
        private readonly string identifier;
 
        public UserDefinedPart(string Identifier)
        {
            this.identifier = Identifier;
        }
 
        public string Identifier => this.identifier;
 
        public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
        {
            if (Macro.Document.namedNodes.TryGetValue(this.identifier, out Asn1Node Node))
            {
                if (Node is Asn1TypeDefinition TypeDef)
                    return TypeDef.Definition.Parse(Document, Macro);
                else if (Node is Asn1Type Type)
                    return Type.Parse(Document, Macro);
                else if (Node is Asn1FieldDefinition FieldDef)
                    return FieldDef.Type.Parse(Document, Macro);
                else
                    throw Document.SyntaxError("Type reference expected: " + this.identifier);
            }
 
            if (Macro.supportingSyntax.TryGetValue(this.identifier, out SupportingSyntax Syntax))
                return Syntax.Parse(Document, Macro);
 
            switch (this.identifier.ToLower())
            {
                case "empty":return null;
                case "type":return Document.ParseType(this.Identifier, false);
                case "value": return Document.ParseValue();
                default: throw Document.SyntaxError("Supporting syntax for " + this.identifier + " not found.");
            }
        }
 
        public override string ToString()
        {
            return this.identifier;
        }
    }
}