Daily update on 20250414-003153 by Nitload Youmu. Additional Message : Tech Issue: due to forbidden of multi-inheritance in C#, full ranslate fron EXPRESS to C# code is impossible, the EXPRESS interpreter in StgSharp will become a dialect

Add: A group of classes imported from lib https://github.com/ixmilia/step under MIT license, representing all STEP AP203 geometry objects
Change: many change to classes from https://github.com/ixmilia/step to link data interfaces to those in StgSharp
Freeze: implementation to StgSharp EXPRESS interpreter about collextion operation and element define grammer

Signed-off-by: Nitload <YoumuLiu_NSI@whv0t.onmicrosoft.com>

StgSharp.Script/Express/ExpAstNode/ExpElementInitializingNode.cs

@@ -0,0 +1,62 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="ExpElementInitializingNode.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.Script.Express
+{
+    public class ExpElementInitializingNode : ExpNode
+    {
+
+        private ExpMetaRefNode _type;
+        private ExpNode _init;
+
+        public ExpElementInitializingNode(
+               Token source,
+               ExpMetaRefNode type,
+               ExpNode initParameter )
+            : base( source )
+        {
+            _type = type;
+            _init = initParameter;
+        }
+
+        public override ExpNode Left => _type;
+
+        public override ExpNode Right => _init;
+
+        public override IExpElementSource EqualityTypeConvert => _type.SourceRef;
+
+    }
+}

StgSharp.Script/Express/ExpElmentSource.cs

@@ -45,6 +45,8 @@ namespace StgSharp.Script.Express
 
         string Name { get; }
 
+        public void AddMember( string name, ExpNode memberNode );
+
         public void Analyse();
 
         public bool TryGetMember( string name, out ExpNode memberNode );

StgSharp.Script/Express/ExpNodeNextEnumerator.cs

@@ -28,6 +28,8 @@
 //     
 //-----------------------------------------------------------------------
 //-----------------------------------------------------------------------
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
 using System;
 using System.Collections;
 using System.Collections.Generic;
@@ -40,13 +42,40 @@ namespace StgSharp.Script.Express
     public class ExpNodeNextEnumerator : IEnumerator<ExpNode>
     {
 
-        private ExpNode _begin;
         private ExpNode _current;
 
+        private List<ExpNode> _begin = new List<ExpNode>();
+
         public ExpNodeNextEnumerator( ExpNode token )
         {
-            _begin = token;
+            _begin[ 0 ] = token;
             _current = token;
+            ExpNode t = token;
+            while( !ReferenceEquals( t.Next, token ) && t.Next != null )
+            {
+                t = t.Next;
+                _begin.Add( t );
+            }
+        }
+
+        public ExpNode this[ int index ]
+        {
+            get
+            {
+                ArgumentOutOfRangeException.ThrowIfNegative( index );
+                ArgumentOutOfRangeException.ThrowIfGreaterThan( index, _begin.Count );
+                return _begin[ index ];
+            }
+        }
+
+        public List<ExpNode> Values => _begin;
+
+        public void AssertEnumeratorCount( int count )
+        {
+            if( _begin.Count != count ) {
+                throw new InvalidOperationException(
+                    $"Enumerator count mismatch. Expected {count}, but got {_begin.Count}." );
+            }
         }
 
         void IDisposable.Dispose()
@@ -66,13 +95,12 @@ namespace StgSharp.Script.Express
 
         void IEnumerator.Reset()
         {
-            _current = _begin;
+            _current = _begin[ 0 ];
         }
 
-        object IEnumerator.Current => throw new NotImplementedException();
+        object IEnumerator.Current => _current;
 
-        ExpNode IEnumerator<ExpNode>.Current => throw new NotImplementedException(
-            );
+        ExpNode IEnumerator<ExpNode>.Current => _current;
 
     }
 }

StgSharp.Script/Express/ExpSyntaxAnalyzer.Common.cs

@@ -113,7 +113,6 @@ namespace StgSharp.Script.Express
             }
 
             //Many thing miss here
-
             _cache.PushOperand( ExpElementMemberNameNode.Create( t ) );
 
             return true;
@@ -258,6 +257,17 @@ namespace StgSharp.Script.Express
             {
                 _cache.PushOperand( ExpInstanceReferenceNode.MakeReferenceFrom( t, instance ) );
                 return true;
+            } else if( _cache.IsLastAddedOperator )
+            {
+                if( _cache.PeekOperand( out _,
+                                        out ExpNode? typenode ) && typenode is ExpMetaRefNode typeRef )
+                {
+                    _cache.PopOperand( out _, out _ );
+                    _local.AddMember( t.Value, typeRef.SourceRef.CreateInstanceNode( t ) );
+                } else
+                {
+                    return false;
+                }
             }
             return false;
         }

StgSharp.Script/Express/ExpSyntaxAnalyzer.cs

@@ -53,7 +53,6 @@ namespace StgSharp.Script.Express
 
         private CompileStack<ExpNode, IExpElementSource> _cache;
         private ExpNode _lastStatement;
-
         private ExpSchema _context;
         private IExpElementSource _local;
 
@@ -107,8 +106,9 @@ namespace StgSharp.Script.Express
                 case TokenFlag.Symbol_Unary or TokenFlag.Symbol_Binary:
                     TryAppendSymbol( expToken );
                     break;
-                case TokenFlag.Member:
-                    TryAppendMember( expToken );
+                case TokenFlag.Number or TokenFlag.String:
+                    ExpElementInstance node = ExpElementInstance.CreateLiteral( expToken );
+                    _cache.PushOperand( node );
                     break;
                 case TokenFlag.Separator_Left:
                     TryAppendPrefixSeparator( expToken );
@@ -125,9 +125,8 @@ namespace StgSharp.Script.Express
                 case TokenFlag.Index_Right:
                     TryAppendIndexRight( expToken );
                     break;
-                case TokenFlag.Number or TokenFlag.String:
-                    ExpElementInstance node = ExpElementInstance.CreateLiteral( expToken );
-                    _cache.PushOperand( node );
+                case TokenFlag.Member:
+                    TryAppendMember( expToken );
                     break;
                 default:
                     break;

StgSharp.Script/Express/IExpMarshalType.cs

@@ -0,0 +1,45 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="IExpMarshalType.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.Script.Express
+{
+    public interface IExpMarshalType<TSelf>
+    {
+
+        static abstract TSelf Create( string name, ExpNode node );
+
+    }
+}