Macros refactoring

ASTPlayground/MainForm.pas

@@ -146,6 +146,7 @@ implementation
 uses
     Myc.Data.Scalar.JSON,
     System.Diagnostics, // For TStopwatch
+    System.TimeSpan,
     Myc.Ast.Json, // For TAstJson serialization
     Myc.Ast.Types, // Needed for TTypeRules
     System.IOUtils; // For TFile
@@ -332,26 +333,47 @@ begin
 
             Scope.Define(
                 'print',
-                TDataValue(
-                    function(const Args: TArray<TDataValue>): TDataValue
-                    var
-                        str: TStringBuilder;
-                    begin
-                        str := TStringBuilder.Create;
-                        try
-                            for var i := 0 to High(Args) do
-                            begin
-                                if Args[i].Kind = vkText then
-                                    str.Append(Args[i].AsText)
-                                else
-                                    str.Append(Args[i].ToString);
-                            end;
-                            Memo1.Lines.Add(str.ToString);
-                        finally
-                            str.Free;
+                function(const Args: TArray<TDataValue>): TDataValue
+                var
+                    str: TStringBuilder;
+                begin
+                    str := TStringBuilder.Create;
+                    try
+                        for var i := 0 to High(Args) do
+                        begin
+                            if Args[i].Kind = vkText then
+                                str.Append(Args[i].AsText)
+                            else
+                                str.Append(Args[i].ToString);
                         end;
-                    end
-                )
+                        Memo1.Lines.Add(str.ToString);
+                    finally
+                        str.Free;
+                    end;
+                end
+            );
+
+            Scope.Define(
+                'timestamp',
+                function(const Args: TArray<TDataValue>): TDataValue
+                begin
+                    Result := TStopwatch.GetTimeStamp div TTimeSpan.TicksPerMillisecond;
+                end
+            );
+
+            TMacroExpander.GlobalMacroRegistry.Define(
+                TAstScript
+                    .Parse(
+                        '''
+                    (defmacro stopwatch [body]
+                      `(do
+                         (def start-time (timestamp))
+                         (def result ~body)
+                         (print "Stopwatch: " (- (timestamp) start-time) "ms" )
+                         result
+                       ))
+                    ''')
+                    .AsMacroDefinition
             );
         end
     );

Src/AST/Myc.Ast.Compiler.Macros.pas

@@ -54,14 +54,19 @@ type
             public
                 constructor Create(AParent: TMacroRegistry);
                 destructor Destroy; override;
-                procedure Define(const Name: string; const Node: IMacroDefinitionNode);
+                procedure Define(const Node: IMacroDefinitionNode);
                 function Find(const Name: string): IMacroDefinitionNode;
             end;
 
+    strict private
+        class var
+            FGlobalMacroRegistry: TMacroRegistry;
+        class constructor CreateClass;
+        class destructor DestroyClass;
+
     private
         FInitialScope: IExecutionScope;
 
-        // Ersetzt FCurrentDescriptor
         FCurrentMacroRegistry: TMacroRegistry;
 
         FEvaluatorFactory: TEvaluatorFactory;
@@ -78,7 +83,6 @@ type
         function VisitUnquote(const Node: IUnquoteNode): IAstNode; override;
         function VisitUnquoteSplicing(const Node: IUnquoteSplicingNode): IAstNode; override;
 
-        // NEU: Überschrieben für lexikalisches Makro-Scoping
         function VisitBlockExpression(const Node: IBlockExpressionNode): IAstNode; override;
         function VisitLambdaExpression(const Node: ILambdaExpressionNode): IAstNode; override;
 
@@ -86,7 +90,6 @@ type
         constructor Create(const AInitialScope: IExecutionScope; const AEvaluatorFactory: TEvaluatorFactory);
         destructor Destroy; override;
 
-        // Signatur geändert
         function Execute(const RootNode: IAstNode): IAstNode;
 
         class function ExpandMacros(
@@ -94,6 +97,8 @@ type
             const RootNode: IAstNode;
             const EvaluatorFactory: TEvaluatorFactory
         ): IAstNode; static;
+
+        class property GlobalMacroRegistry: TMacroRegistry read FGlobalMacroRegistry;
     end;
 
 implementation
@@ -119,9 +124,9 @@ begin
     inherited Destroy;
 end;
 
-procedure TMacroExpander.TMacroRegistry.Define(const Name: string; const Node: IMacroDefinitionNode);
+procedure TMacroExpander.TMacroRegistry.Define(const Node: IMacroDefinitionNode);
 begin
-    FMacros.AddOrSetValue(Name, Node);
+    FMacros.AddOrSetValue(Node.Name.Name, Node);
 end;
 
 function TMacroExpander.TMacroRegistry.Find(const Name: string): IMacroDefinitionNode;
@@ -292,7 +297,12 @@ begin
     FEvaluatorFactory := AEvaluatorFactory;
 
     // Erzeugt die Root-Registry für Makros
-    FCurrentMacroRegistry := TMacroRegistry.Create(nil);
+    FCurrentMacroRegistry := TMacroRegistry.Create(FGlobalMacroRegistry);
+end;
+
+class constructor TMacroExpander.CreateClass;
+begin
+    FGlobalMacroRegistry := TMacroRegistry.Create(nil);
 end;
 
 destructor TMacroExpander.Destroy;
@@ -301,6 +311,11 @@ begin
     inherited Destroy;
 end;
 
+class destructor TMacroExpander.DestroyClass;
+begin
+    FGlobalMacroRegistry.Free;
+end;
+
 procedure TMacroExpander.EnterMacroScope;
 begin
     // Erstellt eine neue Registry mit der aktuellen als Parent
@@ -334,13 +349,10 @@ begin
 
     if not Assigned(Result) then
         Result := TAst.Block([]); // e.g. if root was (defmacro ...)
-
-    // Descriptor := FCurrentDescriptor; // Entfernt
 end;
 
 function TMacroExpander.VisitBlockExpression(const Node: IBlockExpressionNode): IAstNode;
 begin
-    // Ein 'do'-Block eröffnet einen neuen Scope für Makros
     EnterMacroScope;
     try
         Result := inherited VisitBlockExpression(Node);
@@ -351,7 +363,6 @@ end;
 
 function TMacroExpander.VisitLambdaExpression(const Node: ILambdaExpressionNode): IAstNode;
 begin
-    // Eine 'fn' eröffnet einen neuen Scope für Makros
     EnterMacroScope;
     try
         Result := inherited VisitLambdaExpression(Node);
@@ -363,7 +374,7 @@ end;
 function TMacroExpander.VisitMacroDefinition(const Node: IMacroDefinitionNode): IAstNode;
 begin
     // Register the macro in the *current* macro registry
-    FCurrentMacroRegistry.Define(Node.Name.Name, Node);
+    FCurrentMacroRegistry.Define(Node);
 
     // Keep the node in the AST (for the visualizer).
     Result := Node;

Src/AST/Myc.Ast.RTL.Core.pas

@@ -13,7 +13,7 @@ type
     TRtlFunctions = record
     public
         [TRtlFunction('+')]
-        class function Add(const Args: TArray<TDataValue>): TDataValue; static;
+        class function Add(const Args: TArray<TDataValue>): TDataValue; overload; static;
 
         [TRtlFunction('-')]
         class function Subtract(const Args: TArray<TDataValue>): TDataValue; static;