Michael Schimmel
977 lines
36 KiB
ObjectPascal
977 lines
36 KiB
ObjectPascal
unit MainForm;
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interface
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uses
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System.SysUtils,
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System.Types,
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System.TypInfo,
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System.UITypes,
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System.Classes,
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System.Variants,
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System.Generics.Collections,
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System.Math,
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FMX.Types,
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FMX.Controls,
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FMX.Forms,
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FMX.Graphics,
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FMX.Dialogs,
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FMX.Memo.Types,
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FMX.StdCtrls,
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FMX.ScrollBox,
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FMX.Memo,
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FMX.Controls.Presentation,
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Myc.Data.Scalar,
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Myc.Data.Value,
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Myc.Ast.Nodes,
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Myc.Ast,
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Myc.Ast.Evaluator,
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Myc.Ast.Printer,
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Myc.Ast.Dumper,
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Myc.Data.Decimal,
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Myc.Ast.Binding,
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Myc.Ast.RTL,
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FMX.Layouts,
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FMX.Objects,
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Myc.Ast.Debugger,
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Myc.Fmx.AstEditor,
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Myc.Fmx.AstEditor.Node,
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Myc.Fmx.AstEditor.Workspace;
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type
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// A test record
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TOHLCV = record
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Timestamp: TDateTime;
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Open: Double;
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High: Double;
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Low: Double;
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Close: Double;
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Volume: Int64;
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end;
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TForm1 = class(TForm)
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Panel1: TPanel;
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Memo1: TMemo;
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Test1Button: TButton;
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Test2Button: TButton;
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PrettyPrintButton: TButton;
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RecursionButton: TButton;
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ShowScopeBox: TCheckBox;
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FibonacciButton: TButton;
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CrerateTriggerExampleButton: TButton;
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DoTriggerButton: TButton;
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DoTrigger2Button: TButton;
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Panel2: TPanel;
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ClearButton: TButton;
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FlowOnlyBox: TCheckBox;
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SeriesTestButton: TButton;
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OHLCButton: TButton;
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DebugBox: TCheckBox;
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FromJSONButton: TButton;
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ToJSONButton: TButton;
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ExternalFuncButton: TButton;
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InnerLambdaButton: TButton;
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DumpButton: TButton;
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FailingUpvalueButton: TButton;
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TailCallButten: TButton;
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procedure InnerLambdaButtonClick(Sender: TObject);
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procedure ClearButtonClick(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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procedure CreateTriggerExampleButtonClick(Sender: TObject);
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procedure DoTrigger2ButtonClick(Sender: TObject);
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procedure DoTriggerButtonClick(Sender: TObject);
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procedure DumpButtonClick(Sender: TObject);
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procedure ExternalFuncButtonClick(Sender: TObject);
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procedure FailingUpvalueButtonClick(Sender: TObject);
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procedure FibonacciButtonClick(Sender: TObject);
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procedure OHLCButtonClick(Sender: TObject);
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procedure PrettyPrintButtonClick(Sender: TObject);
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procedure RecursionButtonClick(Sender: TObject);
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procedure SeriesTestButtonClick(Sender: TObject);
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procedure Test1ButtonClick(Sender: TObject);
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procedure Test2ButtonClick(Sender: TObject);
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procedure FromJSONButtonClick(Sender: TObject);
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procedure TailCallButtenClick(Sender: TObject);
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procedure ToJSONButtonClick(Sender: TObject);
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private
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// Stores the last AST generated by Test1 or Test2 button clicks.
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FLastAst: IAstNode;
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FGScope: IExecutionScope;
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FWorkspace: TAuraWorkspace;
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procedure WorkspaceMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
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function CreateVisitor(Scope: IExecutionScope): IAstVisitor;
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// Helper function to encapsulate the Bind -> Evaluate pattern
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function ExecuteAst(const ANode: IAstNode; const AParentScope: IExecutionScope): TDataValue;
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public
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{ Public declarations }
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end;
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var
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Form1: TForm1;
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implementation
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uses
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Myc.Data.Scalar.JSON,
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System.Diagnostics, // For TStopwatch
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Myc.Ast.Json; // For TAstJson serialization
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{$R *.fmx}
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procedure TForm1.InnerLambdaButtonClick(Sender: TObject);
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var
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// Only the root node is needed as a local variable.
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mainBlock: IAstNode;
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// Execution and result variables
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resultValue: TDataValue;
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begin
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// Build the entire AST inline to ensure no node instances are shared.
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mainBlock :=
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TAst.Block(
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[
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// var outer = lambda() { ... };
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TAst.VarDecl(
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TAst.Identifier('outer'),
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TAst.LambdaExpr(
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[],
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TAst.Block(
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[
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// var x = 10;
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TAst.VarDecl(TAst.Identifier('x'), TAst.Constant(TScalar.FromInteger(10))),
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// var inner = lambda() { ... };
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TAst.VarDecl(
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TAst.Identifier('inner'),
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TAst.LambdaExpr(
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[],
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TAst.Block(
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[
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// var innermost = lambda() { ... };
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TAst.VarDecl(
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TAst.Identifier('innermost'),
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TAst.LambdaExpr(
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[],
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// x = x + 5;
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TAst.Assign(
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TAst.Identifier('x'),
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TAst.BinaryExpr(
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TAst.Identifier('x'),
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boAdd,
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TAst.Constant(TScalar.FromInteger(5))
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)
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)
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)
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),
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// innermost();
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TAst.FunctionCall(TAst.Identifier('innermost'), [])
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]
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)
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)
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),
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// inner();
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TAst.FunctionCall(TAst.Identifier('inner'), []),
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// return x;
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TAst.Identifier('x')
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]
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)
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)
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),
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// var finalResult = outer();
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TAst.VarDecl(TAst.Identifier('finalResult'), TAst.FunctionCall(TAst.Identifier('outer'), []))
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]
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);
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FLastAst := mainBlock;
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resultValue := ExecuteAst(mainBlock, FGScope);
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Assert(TScalar.FromInteger(15) = resultValue.AsScalar, 'The final result should be 15, but is ' + resultValue.AsScalar.ToString);
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end;
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procedure TForm1.ClearButtonClick(Sender: TObject);
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begin
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FWorkspace.DeleteChildren;
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FWorkspace.Repaint;
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// Create and prepare the global scope once
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FGScope := TAst.CreateScope(nil);
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RegisterNativeFunctions(FGScope);
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end;
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function TForm1.ExecuteAst(const ANode: IAstNode; const AParentScope: IExecutionScope): TDataValue;
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begin
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// This helper function handles simple, one-off script executions.
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// It binds the AST and then decides whether to run a debug session or a standard evaluation.
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var scriptScope := TAstBinder.Bind(ANode, AParentScope).CreateScope(AParentScope);
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var visitor := CreateVisitor(scriptScope);
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Result := visitor.Execute(ANode);
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end;
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procedure TForm1.FormCreate(Sender: TObject);
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begin
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FWorkspace := TAuraWorkspace.Create(Panel2);
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FWorkspace.Parent := Panel2;
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FWorkspace.Align := TAlignLayout.Client;
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FWorkspace.ClipChildren := true;
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FWorkspace.OnMouseDown := WorkspaceMouseDown;
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Tast.RegisterLibrary(
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procedure(const Scope: IExecutionScope)
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begin
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var smaAst :=
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TAst.LambdaExpr(
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[TAst.Identifier('len')],
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TAst.Block(
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[
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TAst.VarDecl(TAst.Identifier('sum'), TAst.Constant(TScalar.FromDouble(0.0))),
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TAst.VarDecl(TAst.Identifier('count'), TAst.Constant(TScalar.FromInt64(0))),
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TAst.LambdaExpr(
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[TAst.Identifier('series'), TAst.Identifier('val')],
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TAst.Block(
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[
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TAst.Assign(
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TAst.Identifier('sum'),
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TAst.BinaryExpr(TAst.Identifier('sum'), boAdd, TAst.Identifier('val'))
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),
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TAst.Assign(
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TAst.Identifier('count'),
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TAst.BinaryExpr(TAst.Identifier('count'), boAdd, TAst.Constant(TScalar.FromInt64(1)))
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),
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TAst.Assign(
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TAst.Identifier('sum'),
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TAst.TernaryExpr(
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TAst.BinaryExpr(TAst.Identifier('count'), boGreater, TAst.Identifier('len')),
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TAst.BinaryExpr(
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TAst.Identifier('sum'),
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boSubtract,
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TAst.Indexer(TAst.Identifier('series'), TAst.Identifier('len'))
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),
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TAst.Identifier('sum')
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)
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),
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TAst.BinaryExpr(
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TAst.Identifier('sum'),
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boDivide,
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TAst.TernaryExpr(
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TAst.BinaryExpr(TAst.Identifier('count'), boLess, TAst.Identifier('len')),
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TAst.Identifier('count'),
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TAst.Identifier('len')
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)
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)
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]
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)
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)
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]
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)
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);
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Scope.Define('CreateSMA', CreateVisitor(TAstBinder.Bind(smaAst, FGScope).CreateScope(FGScope)).Execute(smaAst));
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end
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);
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// Setup global scope
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ClearButtonClick(Self);
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end;
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procedure TForm1.FibonacciButtonClick(Sender: TObject);
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var
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root: IAstNode;
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result: TDataValue;
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sw: TStopwatch;
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begin
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// This script defines a naive, slow recursive 'fib' function.
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// The lambda captures its own name ('fib') from the parent scope to perform recursion.
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var fibAst :=
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TAst.Block(
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[
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// 1. var fib; (Declare the name so it can be captured by the lambda)
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TAst.VarDecl(TAst.Identifier('fib')),
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// 2. fib = lambda(n) { ... fib(n-1) + fib(n-2) ... };
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TAst.Assign(
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TAst.Identifier('fib'),
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TAst.LambdaExpr(
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[TAst.Identifier('n')],
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TAst.TernaryExpr(
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TAst.BinaryExpr(TAst.Identifier('n'), boLess, TAst.Constant(TScalar.FromInt64(2))),
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TAst.Identifier('n'),
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TAst.BinaryExpr(
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// Naive recursive call using the variable name 'fib'
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TAst.FunctionCall(
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TAst.Identifier('fib'),
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[TAst.BinaryExpr(TAst.Identifier('n'), boSubtract, TAst.Constant(TScalar.FromInt64(1)))]
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),
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boAdd,
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// Second naive recursive call
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TAst.FunctionCall(
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TAst.Identifier('fib'),
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[TAst.BinaryExpr(TAst.Identifier('n'), boSubtract, TAst.Constant(TScalar.FromInt64(2)))]
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)
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)
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)
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)
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)
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]
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);
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// Create a new scope and define the 'fib' function within it.
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var fibScope := TAstBinder.Bind(fibAst, FGScope).CreateScope(FGScope);
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var visitor := CreateVisitor(fibScope);
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visitor.Execute(fibAst);
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Memo1.Lines.Clear;
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Memo1.Lines.Add('--- Naive recursive fib with AST---');
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sw := TStopwatch.StartNew;
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// The script to execute is just the call to the function.
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root := TAst.FunctionCall(TAst.Identifier('fib'), [TAst.Constant(TScalar.FromInt64(25))]);
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FLastAst := root;
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// Execute within the scope where 'fib' is defined.
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result := ExecuteAst(root, fibScope);
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sw.Stop;
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Memo1.Lines.Add(Format('Result: fib(30) %s (calculated in %d ms)', [result.ToString, sw.ElapsedMilliseconds]));
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Memo1.Lines.Add('');
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Memo1.Lines.Add('--- Memoized naive fib with AST (using global fib)---');
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sw := TStopwatch.StartNew;
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root :=
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TAst.Block(
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[
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// Create a memoized version by calling the RTL function on 'fib'
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TAst.Assign(TAst.Identifier('fib'), TAst.FunctionCall(TAst.Identifier('Memoize'), [TAst.Identifier('fib')])),
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// Call the new, memoized function
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TAst.FunctionCall(TAst.Identifier('fib'), [TAst.Constant(TScalar.FromInt64(25))])
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]
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);
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FLastAst := root;
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result := ExecuteAst(root, fibScope);
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sw.Stop;
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Memo1.Lines.Add(Format('Result: fib(30) %s (calculated in %d ms)', [result.ToString, sw.ElapsedMilliseconds]));
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end;
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procedure TForm1.PrettyPrintButtonClick(Sender: TObject);
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var
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visitor: TPrettyPrintVisitor;
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begin
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Memo1.Lines.Clear;
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Memo1.Lines.Add('--- AST Pretty Print ---');
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if not Assigned(FLastAst) then
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begin
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Memo1.Lines.Add('No AST has been generated yet.');
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exit;
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end;
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visitor := TPrettyPrintVisitor.Create;
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visitor.Execute(FLastAst);
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Memo1.Lines.Add(visitor.GetResult);
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end;
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procedure TForm1.RecursionButtonClick(Sender: TObject);
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var
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root: IAstNode;
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result: TDataValue;
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sw: TStopwatch;
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begin
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Memo1.Lines.Clear;
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Memo1.Lines.Add('--- Tail-Recursive factorial(20) ---');
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sw := TStopwatch.StartNew;
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// Rewritten to be tail-recursive to use 'recur'
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root :=
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TAst.Block(
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[
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// Define the tail-recursive helper function
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TAst.VarDecl(
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TAst.Identifier('fact_iter'),
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TAst.LambdaExpr(
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[TAst.Identifier('n'), TAst.Identifier('acc')],
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TAst.TernaryExpr(
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TAst.BinaryExpr(TAst.Identifier('n'), boLessOrEqual, TAst.Constant(TScalar.FromInt64(1))),
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TAst.Identifier('acc'), // Base case: return the accumulator
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TAst.Recur( // Tail-recursive step
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[
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TAst.BinaryExpr(TAst.Identifier('n'), boSubtract, TAst.Constant(TScalar.FromInt64(1))),
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TAst.BinaryExpr(TAst.Identifier('acc'), boMultiply, TAst.Identifier('n'))
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]
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)
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)
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)
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),
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// Define the public-facing factorial function
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TAst.VarDecl(
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TAst.Identifier('factorial'),
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TAst.LambdaExpr(
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[TAst.Identifier('n')],
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TAst.FunctionCall(TAst.Identifier('fact_iter'), [TAst.Identifier('n'), TAst.Constant(TScalar.FromInt64(1))])
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)
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),
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// Call the main function
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TAst.FunctionCall(TAst.Identifier('factorial'), [TAst.Constant(TScalar.FromInt64(20))])
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]
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);
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FLastAst := root;
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// Execute with FGScope as parent.
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result := ExecuteAst(root, FGScope);
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sw.Stop;
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Memo1.Lines.Add(Format('Result: %s (calculated in %d ms)', [result.ToString, sw.ElapsedMilliseconds]));
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end;
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procedure TForm1.SeriesTestButtonClick(Sender: TObject);
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var
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ast, callAst: IAstNode;
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resultValue: TDataValue;
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series: TScalarRecordSeries;
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recordDef: TScalarRecordDefinition;
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i: Integer;
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scope: IExecutionScope;
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begin
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Memo1.Lines.Clear;
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Memo1.Lines.Add('--- Series Test ---');
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scope := TAst.CreateScope(FGScope);
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recordDef := TRttiAstHelper.JsonToRecordDefinition(TRttiAstHelper.RecordDefinitionToJson<TOHLCV>);
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series := TScalarRecordSeries.Create(recordDef);
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for i := 0 to 4 do
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begin
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series.Add(
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TScalarRecord.Create(
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recordDef,
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[
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TScalarValue.FromDateTime(Now + i),
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TScalarValue.FromDouble(100.0 + i),
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TScalarValue.FromDouble(105.0 + i),
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TScalarValue.FromDouble(98.0 + i),
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TScalarValue.FromDouble(102.0 + i),
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TScalarValue.FromInt64(10000 * (i + 1))
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]
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)
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);
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end;
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scope.Define('ohlcvSeries', TDataValue.FromRecordSeries(series));
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ast :=
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TAst.LambdaExpr(
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[],
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TAst.Block(
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[
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TAst.VarDecl(
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TAst.Identifier('closeColumn'),
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TAst.MemberAccess(TAst.Identifier('ohlcvSeries'), TAst.Identifier('Close'))
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),
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TAst.Indexer(TAst.Identifier('closeColumn'), TAst.Constant(TScalar.FromInt64(1)))
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]
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)
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);
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FLastAst := ast;
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callAst := TAst.FunctionCall(ast, []);
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resultValue := ExecuteAst(callAst, scope);
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Memo1.Lines.Add(Format('Result of script: %s', [resultValue.ToString]));
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end;
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|
|
procedure TForm1.Test1ButtonClick(Sender: TObject);
|
|
var
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main, callAst: IAstNode;
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result: TDataValue;
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sw: TStopwatch;
|
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begin
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Memo1.Lines.Clear;
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Memo1.Lines.Add('--- Simple AST Execution ---');
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sw := TStopwatch.StartNew;
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main :=
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TAst.LambdaExpr(
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[],
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TAst.Block(
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[
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TAst.VarDecl(TAst.Identifier('a'), TAst.Constant(TScalar.FromInt64(10))),
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TAst.VarDecl(
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TAst.Identifier('b'),
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TAst.BinaryExpr(TAst.Identifier('a'), boMultiply, TAst.Constant(TScalar.FromInt64(2)))
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),
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TAst.BinaryExpr(TAst.Identifier('a'), boAdd, TAst.Identifier('b'))
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]
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)
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);
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FLastAst := main;
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callAst := TAst.FunctionCall(main, []);
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result := ExecuteAst(callAst, FGScope);
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sw.Stop;
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Memo1.Lines.Add(Format('Result: %s (calculated in %d ms)', [result.ToString, sw.ElapsedMilliseconds]));
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end;
|
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|
|
procedure TForm1.Test2ButtonClick(Sender: TObject);
|
|
var
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root: IAstNode;
|
|
result: TDataValue;
|
|
sw: TStopwatch;
|
|
begin
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Memo1.Lines.Clear;
|
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Memo1.Lines.Add('--- Factory Pattern Demo ---');
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sw := TStopwatch.StartNew;
|
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root :=
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TAst.Block(
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[
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TAst.VarDecl(
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TAst.Identifier('createStrategyInstance'),
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|
TAst.LambdaExpr(
|
|
[TAst.Identifier('offset')],
|
|
TAst.Block(
|
|
[
|
|
TAst.VarDecl(TAst.Identifier('baseValue'), TAst.Constant(TScalar.FromInt64(100))),
|
|
TAst.BinaryExpr(TAst.Identifier('baseValue'), boAdd, TAst.Identifier('offset'))
|
|
]
|
|
)
|
|
)
|
|
),
|
|
TAst.FunctionCall(TAst.Identifier('createStrategyInstance'), [TAst.Constant(TScalar.FromInt64(20))]),
|
|
TAst.FunctionCall(TAst.Identifier('createStrategyInstance'), [TAst.Constant(TScalar.FromInt64(55))])
|
|
]
|
|
);
|
|
|
|
FLastAst := root;
|
|
result := ExecuteAst(root, FGScope);
|
|
|
|
sw.Stop;
|
|
Memo1.Lines.Add(Format('Result of the final expression: %s (calculated in %d ms)', [result.ToString, sw.ElapsedMilliseconds]));
|
|
end;
|
|
|
|
procedure TForm1.WorkspaceMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
|
|
begin
|
|
if Button <> TMouseButton.mbMiddle then
|
|
exit;
|
|
|
|
if FLastAst <> nil then
|
|
begin
|
|
var visu := TVisualizationMode.vmDetailed;
|
|
if FlowOnlyBox.IsChecked then
|
|
visu := TVisualizationMode.vmControlFlow;
|
|
|
|
var descr := TAstBinder.Bind(FLastAst, FGScope);
|
|
FWorkspace.BuildTree(FLastAst, descr.CreateScope(FGScope), TPointF.Create(X, Y), visu);
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.OHLCButtonClick(Sender: TObject);
|
|
const
|
|
numRecs = 1000;
|
|
lookback = 50;
|
|
smaSlowLength = 20;
|
|
smaFastLength = 10;
|
|
var
|
|
scope: IExecutionScope;
|
|
begin
|
|
Memo1.Lines.Clear;
|
|
Memo1.Lines.Add(Format('--- Simulating O(1) SMA Crossover Strategy for %d ticks ---', [numRecs]));
|
|
var sw := TStopwatch.StartNew;
|
|
var setupAst :=
|
|
TAst.Block(
|
|
[
|
|
TAst.VarDecl(
|
|
TAst.Identifier('smaFast'),
|
|
TAst.FunctionCall(TAst.Identifier('CreateSMA'), [TAst.Constant(TScalar.FromInt64(smaFastLength))])
|
|
),
|
|
TAst.VarDecl(
|
|
TAst.Identifier('smaSlow'),
|
|
TAst.FunctionCall(TAst.Identifier('CreateSMA'), [TAst.Constant(TScalar.FromInt64(smaSlowLength))])
|
|
),
|
|
TAst.VarDecl(
|
|
TAst.Identifier('maCrossStrategy'),
|
|
TAst.LambdaExpr(
|
|
[TAst.Identifier('ohlcv')],
|
|
TAst.Block(
|
|
[
|
|
TAst.VarDecl(
|
|
TAst.Identifier('closeSeries'),
|
|
TAst.MemberAccess(TAst.Identifier('ohlcv'), TAst.Identifier('Close'))
|
|
),
|
|
TAst.VarDecl(
|
|
TAst.Identifier('currentClose'),
|
|
TAst.Indexer(TAst.Identifier('closeSeries'), TAst.Constant(TScalar.FromInt64(0)))
|
|
),
|
|
TAst.VarDecl(
|
|
TAst.Identifier('valSmaFast'),
|
|
TAst.FunctionCall(
|
|
TAst.Identifier('smaFast'),
|
|
[TAst.Identifier('closeSeries'), TAst.Identifier('currentClose')]
|
|
)
|
|
),
|
|
TAst.VarDecl(
|
|
TAst.Identifier('valSmaSlow'),
|
|
TAst.FunctionCall(
|
|
TAst.Identifier('smaSlow'),
|
|
[TAst.Identifier('closeSeries'), TAst.Identifier('currentClose')]
|
|
)
|
|
),
|
|
TAst.TernaryExpr(
|
|
TAst.BinaryExpr(TAst.Identifier('valSmaFast'), boGreater, TAst.Identifier('valSmaSlow')),
|
|
TAst.Constant(TScalar.FromInt64(1)),
|
|
TAst.Constant(TScalar.FromInt64(-1))
|
|
)
|
|
]
|
|
)
|
|
)
|
|
)
|
|
]
|
|
);
|
|
FLastAst := setupAst;
|
|
|
|
// 1. Bind and execute the setup script.
|
|
scope := TAstBinder.Bind(setupAst, FGScope).CreateScope(FGScope);
|
|
|
|
// This is a temporary visitor just for the setup execution.
|
|
var setupVisitor := CreateVisitor(scope);
|
|
setupVisitor.Execute(setupAst);
|
|
|
|
// 2. Prepare for the simulation loop by modifying the now-populated scope.
|
|
scope.Define('current_series', TDataValue.Void);
|
|
var currentSeriesIdent := TAst.Identifier('current_series');
|
|
var callAst := TAst.FunctionCall(TAst.Identifier('maCrossStrategy'), [currentSeriesIdent]);
|
|
|
|
// 3. Re-bind the scope with the new AST. This creates the FINAL scope for the loop.
|
|
scope := TAstBinder.Bind(callAst, scope).CreateScope(scope);
|
|
var seriesAddress := currentSeriesIdent.Address;
|
|
|
|
var visitor := CreateVisitor(scope);
|
|
|
|
// 5. Simulation Loop
|
|
Memo1.Lines.Add('Starting simulation...');
|
|
Application.ProcessMessages;
|
|
|
|
var lastClose := 1000.0;
|
|
Randomize;
|
|
var recDef := TRttiAstHelper.JsonToRecordDefinition(TRttiAstHelper.RecordDefinitionToJson<TOHLCV>);
|
|
var series := TDataValue.FromRecordSeries(TScalarRecordSeries.Create(recDef));
|
|
var nw := Now;
|
|
var ohlcvRec: TOHLCV;
|
|
for var i := 1 to numRecs do
|
|
begin
|
|
// ... (simulation logic is unchanged) ...
|
|
ohlcvRec.Timestamp := nw + (i / (24 * 60));
|
|
ohlcvRec.Open := lastClose + (Random * 0.05);
|
|
ohlcvRec.Close := lastClose + (Random - 0.49) * 2;
|
|
ohlcvRec.High := Max(ohlcvRec.Open, ohlcvRec.Close) + Random;
|
|
ohlcvRec.Low := Min(ohlcvRec.Open, ohlcvRec.Close) - Random;
|
|
ohlcvRec.Volume := RandomRange(1000, 50000);
|
|
lastClose := ohlcvRec.Close;
|
|
var recordValue :=
|
|
TScalarRecord.Create(
|
|
recDef,
|
|
[
|
|
TScalarValue.FromDateTime(ohlcvRec.Timestamp),
|
|
TScalarValue.FromDouble(ohlcvRec.Open),
|
|
TScalarValue.FromDouble(ohlcvRec.High),
|
|
TScalarValue.FromDouble(ohlcvRec.Low),
|
|
TScalarValue.FromDouble(ohlcvRec.Close),
|
|
TScalarValue.FromInt64(ohlcvRec.Volume)
|
|
]
|
|
);
|
|
series.AsRecordSeries.Add(recordValue, lookback);
|
|
|
|
if series.AsRecordSeries.TotalCount >= smaSlowLength then
|
|
begin
|
|
scope[seriesAddress] := series;
|
|
var resultValue := visitor.Execute(callAst);
|
|
if i mod 50 = 0 then
|
|
begin
|
|
Memo1.Lines.Add(Format('Tick %d/%d: Close = %.2f, Signal = %s', [i, numRecs, ohlcvRec.Close, resultValue.ToString]));
|
|
Application.ProcessMessages;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
sw.Stop;
|
|
Memo1.Lines.Add('--- Simulation Finished ---');
|
|
Memo1.Lines.Add(Format('Total time: %d ms', [sw.ElapsedMilliseconds]));
|
|
end;
|
|
|
|
var
|
|
TriggerScope: IExecutionScope;
|
|
|
|
procedure TForm1.CreateTriggerExampleButtonClick(Sender: TObject);
|
|
var
|
|
blk: IAstNode;
|
|
begin
|
|
Memo1.Lines.Clear;
|
|
Memo1.Lines.Add('--- Creating Trigger Blueprint ---');
|
|
blk :=
|
|
TAst.Block(
|
|
[
|
|
TAst.VarDecl(TAst.Identifier('X'), TAst.Constant(TScalar.FromInt64(0))),
|
|
TAst.VarDecl(
|
|
TAst.Identifier('tickHandler'),
|
|
TAst.LambdaExpr(
|
|
[TAst.Identifier('summand')],
|
|
TAst.Assign(TAst.Identifier('X'), TAst.BinaryExpr(TAst.Identifier('X'), boAdd, TAst.Identifier('summand')))
|
|
)
|
|
)
|
|
]
|
|
);
|
|
|
|
TriggerScope := TAstBinder.Bind(blk, FGScope).CreateScope(FGScope);
|
|
|
|
// This case is simple enough to just inline the logic from ExecuteAst
|
|
var visitor := CreateVisitor(TriggerScope);
|
|
visitor.Execute(blk);
|
|
|
|
FLastAst := blk;
|
|
|
|
Memo1.Lines.Add('Variable "X" and function "tickHandler" defined in persistent scope.');
|
|
Memo1.Lines.Add('Click "Do Trigger" to execute.');
|
|
end;
|
|
|
|
function TForm1.CreateVisitor(Scope: IExecutionScope): IAstVisitor;
|
|
begin
|
|
if DebugBox.IsChecked then
|
|
Result := TDebugEvaluatorVisitor.Create(Scope, Memo1.Lines, ShowScopeBox.IsChecked)
|
|
else
|
|
Result := TEvaluatorVisitor.Create(Scope);
|
|
end;
|
|
|
|
procedure TForm1.DoTriggerButtonClick(Sender: TObject);
|
|
var
|
|
callAst: IFunctionCallNode;
|
|
begin
|
|
callAst := TAst.FunctionCall(TAst.Identifier('tickHandler'), [TAst.Constant(TScalar.FromInt64(1))]);
|
|
FLastAst := callAst;
|
|
|
|
var X := ExecuteAst(callAst, TriggerScope);
|
|
|
|
Memo1.Lines.Add(Format('Tick(1)! New value of X: %s', [X.ToString]));
|
|
end;
|
|
|
|
procedure TForm1.DoTrigger2ButtonClick(Sender: TObject);
|
|
var
|
|
callAst: IFunctionCallNode;
|
|
begin
|
|
callAst := TAst.FunctionCall(TAst.Identifier('tickHandler'), [TAst.Constant(TScalar.FromInt64(2))]);
|
|
FLastAst := callAst;
|
|
|
|
var X := ExecuteAst(callAst, TriggerScope);
|
|
|
|
Memo1.Lines.Add(Format('Tick(2)! New value of X: %s', [X.ToString]));
|
|
end;
|
|
|
|
procedure TForm1.DumpButtonClick(Sender: TObject);
|
|
begin
|
|
// Call the dumper for the last AST.
|
|
Memo1.Lines.Clear;
|
|
Memo1.Lines.Add('--- AST Dump ---');
|
|
|
|
if not Assigned(FLastAst) then
|
|
begin
|
|
Memo1.Lines.Add('No AST has been generated yet. Click a test button first.');
|
|
exit;
|
|
end;
|
|
|
|
TAstDumper.Dump(FLastAst, Memo1.Lines);
|
|
end;
|
|
|
|
procedure TForm1.ExternalFuncButtonClick(Sender: TObject);
|
|
var
|
|
scope: IExecutionScope;
|
|
callAst: IAstNode;
|
|
resultValue: TDataValue;
|
|
begin
|
|
Memo1.Lines.Clear;
|
|
Memo1.Lines.Add('--- Calling external Delphi function from AST ---');
|
|
|
|
scope := TAst.CreateScope(FGScope);
|
|
|
|
scope.Define(
|
|
'delphiAdd',
|
|
function(const ArgNodes: TArray<TDataValue>): TDataValue
|
|
var
|
|
val1, val2: Int64;
|
|
begin
|
|
if Length(ArgNodes) <> 2 then
|
|
raise Exception.Create('delphiAdd requires exactly 2 arguments.');
|
|
val1 := ArgNodes[0].AsScalar.Value.AsInt64;
|
|
val2 := ArgNodes[1].AsScalar.Value.AsInt64;
|
|
Result := TScalar.FromInt64(val1 + val2);
|
|
end
|
|
);
|
|
|
|
callAst :=
|
|
TAst.FunctionCall(TAst.Identifier('delphiAdd'), [TAst.Constant(TScalar.FromInt64(100)), TAst.Constant(TScalar.FromInt64(23))]);
|
|
|
|
FLastAst := callAst;
|
|
resultValue := ExecuteAst(callAst, scope);
|
|
Memo1.Lines.Add(Format('Result from delphiAdd(100, 23): %s', [resultValue.ToString]));
|
|
end;
|
|
|
|
procedure TForm1.FailingUpvalueButtonClick(Sender: TObject);
|
|
var
|
|
mainBlock: IAstNode;
|
|
resultValue: TDataValue;
|
|
begin
|
|
mainBlock :=
|
|
TAst.Block(
|
|
[
|
|
// 1. Define the shared variable.
|
|
TAst.VarDecl(TAst.Identifier('a'), TAst.Constant(TScalar.FromInt64(10))),
|
|
// 2. Define a function that returns a closure that MODIFIES 'a'.
|
|
// This creates the multi-level capture scenario.
|
|
TAst.VarDecl(
|
|
TAst.Identifier('modifier'),
|
|
TAst.LambdaExpr(
|
|
[], // Outer modifier shell
|
|
TAst.LambdaExpr(
|
|
[], // Inner closure that is returned
|
|
TAst.Assign(
|
|
TAst.Identifier('a'),
|
|
TAst.BinaryExpr(TAst.Identifier('a'), boAdd, TAst.Constant(TScalar.FromInt64(5)))
|
|
)
|
|
)
|
|
)
|
|
),
|
|
// 3. Define a simple closure that READS 'a'.
|
|
TAst.VarDecl(TAst.Identifier('reader'), TAst.LambdaExpr([], TAst.Identifier('a'))),
|
|
// --- Execute the test ---
|
|
// 4. Get the inner modifier closure.
|
|
TAst.VarDecl(TAst.Identifier('innermost_closure'), TAst.FunctionCall(TAst.Identifier('modifier'), [])),
|
|
// 5. Call the inner closure to modify 'a'.
|
|
TAst.FunctionCall(TAst.Identifier('innermost_closure'), []),
|
|
// 6. Call the reader to get the final value.
|
|
TAst.FunctionCall(TAst.Identifier('reader'), [])
|
|
]
|
|
);
|
|
|
|
FLastAst := mainBlock;
|
|
Memo1.Lines.Clear;
|
|
Memo1.Lines.Add('--- Executing Corrected Upvalue Test ---');
|
|
|
|
resultValue := ExecuteAst(mainBlock, FGScope);
|
|
|
|
// With a correct binder and evaluator, the result must be 15.
|
|
var res := resultValue.AsScalar.Value.AsInt64;
|
|
if res = 15 then
|
|
begin
|
|
Memo1.Lines.Add('SUCCESS: The result is 15.');
|
|
end
|
|
else
|
|
begin
|
|
Memo1.Lines.Add(Format('FAILURE: Expected 15, but got %s.', [resultValue.ToString]));
|
|
end;
|
|
|
|
Assert(TScalar.FromInteger(15) = resultValue.AsScalar, 'The final result should be 15.');
|
|
Memo1.Lines.Add('Please check the new dump.');
|
|
end;
|
|
|
|
procedure TForm1.FromJSONButtonClick(Sender: TObject);
|
|
var
|
|
jsonString: string;
|
|
begin
|
|
Memo1.Lines.BeginUpdate;
|
|
try
|
|
jsonString := Memo1.Lines.Text;
|
|
Memo1.Lines.Clear;
|
|
|
|
if jsonString.IsEmpty then
|
|
begin
|
|
Memo1.Lines.Add('Memo is empty. Please paste an AST JSON string.');
|
|
exit;
|
|
end;
|
|
|
|
try
|
|
FLastAst := TAstJson.Deserialize(jsonString);
|
|
Memo1.Lines.Add('AST deserialized successfully from JSON.');
|
|
Memo1.Lines.Add('You can now visualize it (Middle Mouse Click) or pretty-print it.');
|
|
except
|
|
on E: Exception do
|
|
begin
|
|
FLastAst := nil;
|
|
Memo1.Lines.Add('Error deserializing AST from JSON:');
|
|
Memo1.Lines.Add(E.Message);
|
|
Memo1.Lines.Add('--- Original JSON ---');
|
|
Memo1.Lines.Text := Memo1.Lines.Text + sLineBreak + jsonString;
|
|
end;
|
|
end;
|
|
finally
|
|
Memo1.Lines.EndUpdate;
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.TailCallButtenClick(Sender: TObject);
|
|
const
|
|
// A large number to prove TCO prevents stack overflow
|
|
RecursionDepth = 1000000;
|
|
var
|
|
root: IAstNode;
|
|
result: TDataValue;
|
|
sw: TStopwatch;
|
|
begin
|
|
Memo1.Lines.Clear;
|
|
Memo1.Lines.Add(Format('--- Testing TCO with recursion depth of %d ---', [RecursionDepth]));
|
|
Application.ProcessMessages;
|
|
sw := TStopwatch.StartNew;
|
|
|
|
root :=
|
|
TAst.Block(
|
|
[
|
|
// var countDown = lambda(n) { ... };
|
|
TAst.VarDecl(
|
|
TAst.Identifier('countDown'),
|
|
TAst.LambdaExpr(
|
|
[TAst.Identifier('n')],
|
|
// if (n > 0) then recur(n-1) else 'done'
|
|
TAst.IfExpr(
|
|
TAst.BinaryExpr(TAst.Identifier('n'), boGreater, TAst.Constant(TScalar.FromInt64(0))),
|
|
// This is the tail call position, now using recur.
|
|
TAst.Recur([TAst.BinaryExpr(TAst.Identifier('n'), boSubtract, TAst.Constant(TScalar.FromInt64(1)))]),
|
|
// Base case of the recursion
|
|
TAst.Constant(TScalar.FromString('done'))
|
|
)
|
|
)
|
|
),
|
|
// Initial call to start the recursion
|
|
TAst.FunctionCall(TAst.Identifier('countDown'), [TAst.Constant(TScalar.FromInt64(RecursionDepth))])
|
|
]
|
|
);
|
|
|
|
FLastAst := root;
|
|
result := ExecuteAst(root, FGScope);
|
|
sw.Stop;
|
|
|
|
Memo1.Lines.Add(Format('Result: %s', [result.ToString]));
|
|
Memo1.Lines.Add(Format('Execution finished in %d ms without stack overflow.', [sw.ElapsedMilliseconds]));
|
|
end;
|
|
|
|
procedure TForm1.ToJSONButtonClick(Sender: TObject);
|
|
var
|
|
jsonString: string;
|
|
begin
|
|
Memo1.Lines.Clear;
|
|
|
|
if not Assigned(FLastAst) then
|
|
begin
|
|
Memo1.Lines.Add('No AST available to serialize. Please generate one first.');
|
|
exit;
|
|
end;
|
|
|
|
try
|
|
jsonString := TAstJson.Serialize(FLastAst);
|
|
Memo1.Lines.Text := jsonString;
|
|
except
|
|
on E: Exception do
|
|
begin
|
|
Memo1.Lines.Add('Error serializing AST to JSON:');
|
|
Memo1.Lines.Add(E.Message);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
end.
|