Michael Schimmel
1202 lines
46 KiB
ObjectPascal
1202 lines
46 KiB
ObjectPascal
unit Myc.Ast.Binding;
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interface
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uses
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System.SysUtils,
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System.Classes,
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System.Generics.Collections,
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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.Visitor,
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Myc.Ast.Scope,
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Myc.Ast.Analyzer,
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Myc.Ast.Types,
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Myc.Ast;
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type
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IAstBinder = interface(IAstVisitor)
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function Execute(const RootNode: IAstNode; out Descriptor: IScopeDescriptor): IAstNode;
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end;
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TAstBinder = class; // Forward declaration
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TEvaluateProc = reference to function(const Node: IAstNode): TDataValue;
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// This visitor handles the expansion of a single macro body (` `...`).
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TExpansionVisitor = class(TAstTransformer)
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private
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FEvaluate: TEvaluateProc;
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FMacroScope: IExecutionScope;
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function TransformAndSpliceNodes(const ANodes: TArray<IAstNode>): TArray<IAstNode>;
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protected
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function VisitUnquote(const Node: IUnquoteNode): TDataValue; override;
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function VisitUnquoteSplicing(const Node: IUnquoteSplicingNode): TDataValue; override;
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function VisitFunctionCall(const Node: IFunctionCallNode): TDataValue; override;
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function VisitBlockExpression(const Node: IBlockExpressionNode): TDataValue; override;
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function VisitRecordLiteral(const Node: IRecordLiteralNode): TDataValue; override;
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public
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constructor Create(const AMacroScope: IExecutionScope; const AEvaluate: TEvaluateProc);
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class function Expand(const MacroScope: IExecutionScope; const RootNode: IAstNode; const AEvaluate: TEvaluateProc): IAstNode;
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end;
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TAstBinder = class(TAstTransformer, IAstBinder)
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private
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type
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TUpvalueMapping = class
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public
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Map: TDictionary<TResolvedAddress, Integer>;
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constructor Create;
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destructor Destroy; override;
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end;
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private
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FInitialScope: IExecutionScope;
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FCurrentDescriptor: IScopeDescriptor;
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FUpvalueStack: TStack<TUpvalueMapping>;
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FNestedLambdaCount: Integer;
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FIsTailStack: TStack<Boolean>;
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FNextIsTail: Boolean;
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FBoxedDeclarations: THashSet<IVariableDeclarationNode>;
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FEvaluatorFactory: TEvaluatorFactory;
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// Operator folding maps
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FBinaryOperators: TDictionary<string, TScalar.TBinaryOp>;
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FUnaryOperators: TDictionary<string, TScalar.TUnaryOp>;
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procedure EnterScope;
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procedure ExitScope;
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function IsValidIdentifier(const Name: string): Boolean;
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function SetType(const NodeData: TDataValue; const AType: IStaticType): TDataValue; overload;
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protected
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function Accept(const Node: IAstNode): TDataValue; override;
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function VisitIdentifier(const Node: IIdentifierNode): TDataValue; override;
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function VisitKeyword(const Node: IKeywordNode): TDataValue; override;
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function VisitVariableDeclaration(const Node: IVariableDeclarationNode): TDataValue; override;
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function VisitAssignment(const Node: IAssignmentNode): TDataValue; override;
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function VisitLambdaExpression(const Node: ILambdaExpressionNode): TDataValue; override;
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function VisitMacroDefinition(const Node: IMacroDefinitionNode): TDataValue; override;
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function VisitFunctionCall(const Node: IFunctionCallNode): TDataValue; override;
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function VisitMacroExpansionNode(const Node: IMacroExpansionNode): TDataValue; override;
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function VisitRecurNode(const Node: IRecurNode): TDataValue; override;
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function VisitBlockExpression(const Node: IBlockExpressionNode): TDataValue; override;
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function VisitIfExpression(const Node: IIfExpressionNode): TDataValue; override;
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function VisitTernaryExpression(const Node: ITernaryExpressionNode): TDataValue; override;
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function VisitBinaryExpression(const Node: IBinaryExpressionNode): TDataValue; override;
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function VisitUnaryExpression(const Node: IUnaryExpressionNode): TDataValue; override;
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function VisitConstant(const Node: IConstantNode): TDataValue; override;
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function VisitMemberAccess(const Node: IMemberAccessNode): TDataValue; override;
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function VisitIndexer(const Node: IIndexerNode): TDataValue; override;
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function VisitRecordLiteral(const Node: IRecordLiteralNode): TDataValue; override;
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function VisitCreateSeries(const Node: ICreateSeriesNode): TDataValue; override;
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function VisitAddSeriesItem(const Node: IAddSeriesItemNode): TDataValue; override;
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function VisitSeriesLength(const Node: ISeriesLengthNode): TDataValue; override;
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public
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constructor Create(const AInitialScope: IExecutionScope; const AEvaluatorFactory: TEvaluatorFactory);
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destructor Destroy; override;
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function Execute(const RootNode: IAstNode; out Descriptor: IScopeDescriptor): IAstNode;
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class function Bind(
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const InitialScope: IExecutionScope;
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const RootNode: IAstNode;
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out Descriptor: IScopeDescriptor;
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const EvaluatorFactory: TEvaluatorFactory
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): IAstNode; static;
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end;
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TBoundIdentifierNode = class(TIdentifierNode)
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private
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FAddress: TResolvedAddress;
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public
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constructor Create(const AUnboundNode: IIdentifierNode; const AAddress: TResolvedAddress);
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property Address: TResolvedAddress read FAddress;
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end;
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TBoundVariableDeclarationNode = class(TVariableDeclarationNode)
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private
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FIsBoxed: Boolean;
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public
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constructor Create(const AIdentifier: IIdentifierNode; AInitializer: IAstNode; AIsBoxed: Boolean);
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property IsBoxed: Boolean read FIsBoxed;
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end;
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TBoundLambdaExpressionNode = class(TLambdaExpressionNode)
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private
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FScopeDescriptor: IScopeDescriptor;
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FUpvalues: TArray<TResolvedAddress>;
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FHasNestedLambdas: Boolean;
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public
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constructor Create(
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const AUnboundNode: ILambdaExpressionNode;
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const ABody: IAstNode;
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const AParameters: TArray<IIdentifierNode>;
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const AScopeDescriptor: IScopeDescriptor;
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const AUpvalues: TArray<TResolvedAddress>;
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AHasNestedLambdas: Boolean
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);
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property ScopeDescriptor: IScopeDescriptor read FScopeDescriptor;
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property Upvalues: TArray<TResolvedAddress> read FUpvalues;
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property HasNestedLambdas: Boolean read FHasNestedLambdas;
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end;
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TBoundFunctionCallNode = class(TFunctionCallNode)
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private
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FIsTailCall: Boolean;
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public
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constructor Create(
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const AUnboundNode: IFunctionCallNode;
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const ACallee: IAstNode;
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const AArguments: TArray<IAstNode>;
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AIsTailCall: Boolean
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);
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property IsTailCall: Boolean read FIsTailCall;
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end;
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TBoundRecordLiteralNode = class(TRecordLiteralNode)
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private
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FDefinition: IScalarRecordDefinition;
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public
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constructor Create(const AFields: TArray<TRecordFieldLiteral>; const ADef: IScalarRecordDefinition);
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property Definition: IScalarRecordDefinition read FDefinition;
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end;
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implementation
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uses
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System.Generics.Defaults,
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System.Character,
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Myc.Data.Keyword;
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type
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TResolvedAddressComparer = class(TEqualityComparer<TResolvedAddress>)
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public
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function Equals(const Left, Right: TResolvedAddress): Boolean; override;
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function GetHashCode(const Value: TResolvedAddress): Integer; override;
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end;
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{ TExpansionVisitor }
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constructor TExpansionVisitor.Create(const AMacroScope: IExecutionScope; const AEvaluate: TEvaluateProc);
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begin
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inherited Create;
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FMacroScope := AMacroScope;
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FEvaluate := AEvaluate;
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end;
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class function TExpansionVisitor.Expand(
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const MacroScope: IExecutionScope;
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const RootNode: IAstNode;
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const AEvaluate: TEvaluateProc
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): IAstNode;
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begin
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var expander := TExpansionVisitor.Create(MacroScope, AEvaluate) as IAstTransformer;
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Result := expander.Execute(RootNode);
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end;
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function TExpansionVisitor.TransformAndSpliceNodes(const ANodes: TArray<IAstNode>): TArray<IAstNode>;
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var
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newList: TList<IAstNode>;
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nodeToSplice: IAstNode;
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begin
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newList := TList<IAstNode>.Create;
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try
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for var node in ANodes do
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begin
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if (node is TUnquoteSplicingNode) then
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begin
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var spliceExpr := (node as TUnquoteSplicingNode).Expression;
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var evaluatedSpliceValue := VisitUnquote(TAst.Unquote(spliceExpr));
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if (not evaluatedSpliceValue.IsVoid) and (evaluatedSpliceValue.Kind = vkInterface) then
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begin
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nodeToSplice := evaluatedSpliceValue.AsIntf<IAstNode>;
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if (nodeToSplice is TBlockExpressionNode) then
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newList.AddRange((nodeToSplice as TBlockExpressionNode).Expressions)
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else
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raise Exception.Create('Expression inside unquote-splicing (`~@`) must be a list of nodes (a block).');
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end
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else
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raise Exception.Create('Expression inside unquote-splicing (`~@`) must evaluate to a list of nodes (a block).');
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end
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else
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begin
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var transformedValue := node.Accept(self);
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if not transformedValue.IsVoid then
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newList.Add(transformedValue.AsIntf<IAstNode>);
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end;
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end;
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Result := newList.ToArray;
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finally
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newList.Free;
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end;
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end;
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function TExpansionVisitor.VisitUnquote(const Node: IUnquoteNode): TDataValue;
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var
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value: TDataValue;
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expr: IAstNode;
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symbol: TResolvedSymbol;
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begin
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expr := Node.Expression;
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if (expr is TIdentifierNode) then
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begin
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// Use new FindSymbol
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symbol := FMacroScope.CreateDescriptor.FindSymbol((expr as TIdentifierNode).Name);
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if (symbol.Address.Kind = akLocalOrParent) and (symbol.Address.ScopeDepth = 0) then
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begin
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// Use symbol.Address
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var argValue := FMacroScope.Values[symbol.Address];
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if argValue.Kind = vkInterface then
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begin
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Result := argValue;
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exit;
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end;
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end;
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end;
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// externally evaluate the expression using the injected evaluator
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value := FEvaluate(expr);
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// Allow unquoting keywords
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if value.Kind in [vkScalar, vkText, vkVoid, vkKeyword] then
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begin
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// vkKeyword needs to be handled differently than other constants
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if value.Kind = vkKeyword then
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Result := TDataValue.FromIntf<IAstNode>(TAst.Keyword(value.AsKeyword.Name))
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else
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Result := TDataValue.FromIntf<IAstNode>(TAst.Constant(value));
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end
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else
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raise Exception.CreateFmt('Cannot unquote complex value of type %s at compile time.', [value.Kind.ToString]);
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end;
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function TExpansionVisitor.VisitUnquoteSplicing(const Node: IUnquoteSplicingNode): TDataValue;
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begin
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raise Exception.Create('Unquote-splicing (`~@`) can only appear inside a list form (e.g., a function call or a `do` block).');
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end;
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function TExpansionVisitor.VisitFunctionCall(const Node: IFunctionCallNode): TDataValue;
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var
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newArgs: TArray<IAstNode>;
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transformedCallee: IAstNode;
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begin
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transformedCallee := Self.Accept(Node.Callee).AsIntf<IAstNode>;
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newArgs := TransformAndSpliceNodes(Node.Arguments);
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Result := TDataValue.FromIntf<IFunctionCallNode>(TAst.FunctionCall(transformedCallee, newArgs));
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end;
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function TExpansionVisitor.VisitBlockExpression(const Node: IBlockExpressionNode): TDataValue;
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var
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newExprs: TArray<IAstNode>;
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begin
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newExprs := TransformAndSpliceNodes(Node.Expressions);
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Result := TDataValue.FromIntf<IBlockExpressionNode>(TAst.Block(newExprs));
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end;
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function TExpansionVisitor.VisitRecordLiteral(const Node: IRecordLiteralNode): TDataValue;
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begin
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// Record literals do not support splicing.
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// We just use the default TAstTransformer implementation which visits child values.
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Result := inherited VisitRecordLiteral(Node);
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end;
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{ TBoundIdentifierNode }
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constructor TBoundIdentifierNode.Create(const AUnboundNode: IIdentifierNode; const AAddress: TResolvedAddress);
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begin
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inherited Create(AUnboundNode.Name);
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FAddress := AAddress;
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end;
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{ TBoundVariableDeclarationNode }
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constructor TBoundVariableDeclarationNode.Create(const AIdentifier: IIdentifierNode; AInitializer: IAstNode; AIsBoxed: Boolean);
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begin
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inherited Create(AIdentifier, AInitializer);
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FIsBoxed := AIsBoxed;
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end;
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{ TBoundLambdaExpressionNode }
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constructor TBoundLambdaExpressionNode.Create(
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const AUnboundNode: ILambdaExpressionNode;
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const ABody: IAstNode;
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const AParameters: TArray<IIdentifierNode>;
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const AScopeDescriptor: IScopeDescriptor;
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const AUpvalues: TArray<TResolvedAddress>;
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AHasNestedLambdas: Boolean
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);
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begin
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inherited Create(AParameters, ABody);
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FScopeDescriptor := AScopeDescriptor;
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FUpvalues := AUpvalues;
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FHasNestedLambdas := AHasNestedLambdas;
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end;
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{ TBoundFunctionCallNode }
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constructor TBoundFunctionCallNode.Create(
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const AUnboundNode: IFunctionCallNode;
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const ACallee: IAstNode;
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const AArguments: TArray<IAstNode>;
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AIsTailCall: Boolean
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);
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begin
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inherited Create(ACallee, AArguments);
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FIsTailCall := AIsTailCall;
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end;
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{ TBoundRecordLiteralNode }
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constructor TBoundRecordLiteralNode.Create(const AFields: TArray<TRecordFieldLiteral>; const ADef: IScalarRecordDefinition);
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begin
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inherited Create(AFields);
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FDefinition := ADef;
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end;
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{ TResolvedAddressComparer }
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function TResolvedAddressComparer.Equals(const Left, Right: TResolvedAddress): Boolean;
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begin
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Result := (Left = Right);
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end;
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function TResolvedAddressComparer.GetHashCode(const Value: TResolvedAddress): Integer;
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begin
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Result := 17;
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Result := Result * 23 + Ord(Value.Kind);
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Result := Result * 23 + Value.ScopeDepth;
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Result := Result * 23 + Value.SlotIndex;
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end;
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{ TAstBinder.TUpvalueMapping }
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constructor TAstBinder.TUpvalueMapping.Create;
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begin
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inherited Create;
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Map := TDictionary<TResolvedAddress, Integer>.Create(TResolvedAddressComparer.Create);
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end;
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destructor TAstBinder.TUpvalueMapping.Destroy;
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begin
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Map.Free;
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inherited Destroy;
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end;
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{ TAstBinder }
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constructor TAstBinder.Create(const AInitialScope: IExecutionScope; const AEvaluatorFactory: TEvaluatorFactory);
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var
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op: TScalar.TBinaryOp;
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begin
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inherited Create;
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Assert(Assigned(AInitialScope));
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Assert(Assigned(AEvaluatorFactory));
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FInitialScope := AInitialScope;
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FEvaluatorFactory := AEvaluatorFactory;
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FCurrentDescriptor := AInitialScope.CreateDescriptor;
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FUpvalueStack := TObjectStack<TUpvalueMapping>.Create(True);
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FNestedLambdaCount := 0;
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FIsTailStack := TStack<Boolean>.Create;
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FNextIsTail := True;
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FBoxedDeclarations := nil;
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// Initialize operator folding maps
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FBinaryOperators := TDictionary<string, TScalar.TBinaryOp>.Create;
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for op := Low(TScalar.TBinaryOp) to High(TScalar.TBinaryOp) do
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FBinaryOperators.Add(op.ToString, op);
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FUnaryOperators := TDictionary<string, TScalar.TUnaryOp>.Create;
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FUnaryOperators.Add('not', TScalar.TUnaryOp.Not);
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// Note: '-' is handled as a special case in VisitFunctionCall
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end;
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destructor TAstBinder.Destroy;
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begin
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FUnaryOperators.Free;
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FBinaryOperators.Free;
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FIsTailStack.Free;
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FUpvalueStack.Free;
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FBoxedDeclarations.Free;
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inherited;
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end;
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function TAstBinder.SetType(const NodeData: TDataValue; const AType: IStaticType): TDataValue;
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begin
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if (not NodeData.IsVoid) and (NodeData.Kind = vkInterface) then
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(NodeData.AsIntf<IAstNode> as TAstNode).StaticType := AType;
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Result := NodeData;
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end;
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function TAstBinder.Accept(const Node: IAstNode): TDataValue;
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begin
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if (not Assigned(Node)) or Done then
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exit;
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FIsTailStack.Push(FNextIsTail);
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try
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Result := inherited Accept(Node);
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finally
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FNextIsTail := FIsTailStack.Pop;
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end;
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end;
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class function TAstBinder.Bind(
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const InitialScope: IExecutionScope;
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const RootNode: IAstNode;
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out Descriptor: IScopeDescriptor;
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const EvaluatorFactory: TEvaluatorFactory
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): IAstNode;
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begin
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var binder := TAstBinder.Create(InitialScope, EvaluatorFactory) as IAstBinder;
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Result := binder.Execute(RootNode, Descriptor);
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end;
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procedure TAstBinder.EnterScope;
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begin
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FCurrentDescriptor := TScope.CreateDescriptor(FCurrentDescriptor);
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end;
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function TAstBinder.Execute(const RootNode: IAstNode; out Descriptor: IScopeDescriptor): IAstNode;
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var
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rootType: IStaticType;
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begin
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FBoxedDeclarations := TUpvalueAnalyzer.Analyze(RootNode, FCurrentDescriptor.Parent);
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try
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EnterScope;
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try
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var transformedValue := Accept(RootNode);
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if transformedValue.IsVoid then
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begin
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Result := TAst.Block([]);
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rootType := TTypes.Void;
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end
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else
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begin
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Result := transformedValue.AsIntf<IAstNode>;
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rootType := (Result as TAstNode).StaticType;
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end;
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// Set the type for the root node (which is often a block)
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(Result as TAstNode).StaticType := rootType;
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Descriptor := FCurrentDescriptor;
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finally
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ExitScope;
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end;
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finally
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// The binder now owns the hash set, which will be freed in the destructor.
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end;
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end;
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function TAstBinder.VisitMacroDefinition(const Node: IMacroDefinitionNode): TDataValue;
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begin
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FCurrentDescriptor.DefineMacro(Node.Name.Name, Node);
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Result := TDataValue.Void;
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// Macros have no type at runtime
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(Node as TAstNode).StaticType := TTypes.Void;
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end;
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function TAstBinder.VisitFunctionCall(const Node: IFunctionCallNode): TDataValue;
|
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var
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calleeIdentifier: TIdentifierNode;
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binaryOp: TScalar.TBinaryOp;
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unaryOp: TScalar.TUnaryOp;
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macroDef: IMacroDefinitionNode;
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left, right: IAstNode;
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leftType, rightType, resultType: IStaticType;
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boundCall: TBoundFunctionCallNode;
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|
callee: IAstNode;
|
|
calleeType: IStaticType;
|
|
args: TArray<IAstNode>;
|
|
i: Integer;
|
|
begin
|
|
// --- Transformation: Keyword-as-Function ---
|
|
// Check if the callee is a keyword literal
|
|
if (Node.Callee is TKeywordNode) then
|
|
begin
|
|
var keywordNode := (Node.Callee as TKeywordNode);
|
|
var keywordName := keywordNode.Value.Name;
|
|
|
|
// 1. Validate argument count
|
|
if Length(Node.Arguments) <> 1 then
|
|
raise ETypeException
|
|
.CreateFmt('Keyword :%s expects exactly one argument (the record/map), but got %d', [keywordName, Length(Node.Arguments)]);
|
|
|
|
// 2. Bind the base (the record/map)
|
|
FNextIsTail := False; // Accessing a member is not a tail call
|
|
var baseNode := Accept(Node.Arguments[0]).AsIntf<IAstNode>;
|
|
|
|
// 3. Create a synthetic IMemberAccessNode
|
|
var memberAccessNode := TAst.MemberAccess(baseNode, TAst.Keyword(keywordName));
|
|
|
|
// 4. Re-bind the synthetic node by calling Accept (which dispatches to VisitMemberAccess)
|
|
// This ensures type checking and type inference for member access is centralized.
|
|
Result := Accept(memberAccessNode);
|
|
exit;
|
|
end;
|
|
|
|
if (Node.Callee is TIdentifierNode) then
|
|
begin
|
|
calleeIdentifier := Node.Callee as TIdentifierNode;
|
|
|
|
// --- Optimization: Operator Folding ---
|
|
|
|
// Try to fold binary operators
|
|
if Length(Node.Arguments) = 2 then
|
|
begin
|
|
if FBinaryOperators.TryGetValue(calleeIdentifier.Name, binaryOp) then
|
|
begin
|
|
FNextIsTail := False;
|
|
left := Accept(Node.Arguments[0]).AsIntf<IAstNode>;
|
|
right := Accept(Node.Arguments[1]).AsIntf<IAstNode>;
|
|
leftType := (left as TAstNode).StaticType;
|
|
rightType := (right as TAstNode).StaticType;
|
|
resultType := TTypeRules.ResolveBinaryOp(binaryOp, leftType, rightType);
|
|
var binExpr := TAst.BinaryExpr(left, binaryOp, right);
|
|
(binExpr as TAstNode).StaticType := resultType;
|
|
Result := TDataValue.FromIntf<IAstNode>(binExpr);
|
|
exit;
|
|
end;
|
|
end;
|
|
|
|
// Try to fold unary operators
|
|
if Length(Node.Arguments) = 1 then
|
|
begin
|
|
if FUnaryOperators.TryGetValue(calleeIdentifier.Name, unaryOp) then
|
|
begin
|
|
FNextIsTail := False;
|
|
right := Accept(Node.Arguments[0]).AsIntf<IAstNode>;
|
|
rightType := (right as TAstNode).StaticType;
|
|
resultType := TTypeRules.ResolveUnaryOp(unaryOp, rightType);
|
|
var unExpr := TAst.UnaryExpr(unaryOp, right);
|
|
(unExpr as TAstNode).StaticType := resultType;
|
|
Result := TDataValue.FromIntf<IAstNode>(unExpr);
|
|
exit;
|
|
end;
|
|
|
|
// Special case for negation '-'
|
|
if (calleeIdentifier.Name = '-') then
|
|
begin
|
|
FNextIsTail := False;
|
|
right := Accept(Node.Arguments[0]).AsIntf<IAstNode>;
|
|
rightType := (right as TAstNode).StaticType;
|
|
resultType := TTypeRules.ResolveUnaryOp(TScalar.TUnaryOp.Negate, rightType);
|
|
var unExpr := TAst.UnaryExpr(TScalar.TUnaryOp.Negate, right);
|
|
(unExpr as TAstNode).StaticType := resultType;
|
|
Result := TDataValue.FromIntf<IAstNode>(unExpr);
|
|
exit;
|
|
end;
|
|
end;
|
|
|
|
// --- Macro Expansion ---
|
|
|
|
macroDef := FCurrentDescriptor.FindMacro(calleeIdentifier.Name);
|
|
if macroDef <> nil then
|
|
begin
|
|
var expansionScope := TAst.CreateScope(nil);
|
|
var params := macroDef.Parameters;
|
|
if Length(Node.Arguments) <> Length(params) then
|
|
raise Exception.CreateFmt(
|
|
'Macro %s expects %d arguments, but got %d',
|
|
[calleeIdentifier.Name, Length(params), Length(Node.Arguments)]);
|
|
|
|
for i := 0 to High(params) do
|
|
expansionScope.Define(params[i].Name, TDataValue.FromIntf<IAstNode>(Node.Arguments[i]));
|
|
|
|
// expand
|
|
var expandedBody :=
|
|
TExpansionVisitor.Expand(
|
|
expansionScope,
|
|
macroDef.Body.Expression,
|
|
function(const Node: IAstNode): TDataValue
|
|
var
|
|
subDescriptor: IScopeDescriptor;
|
|
begin
|
|
// in place evaluator for expanded expressions
|
|
var tempInitScope := TScope.CreateScope(FInitialScope.Parent, FCurrentDescriptor, nil);
|
|
var boundSubAst := TAstBinder.Bind(tempInitScope, Node, subDescriptor, FEvaluatorFactory);
|
|
var evalScope := subDescriptor.CreateScope(tempInitScope);
|
|
var evaluator := FEvaluatorFactory(evalScope);
|
|
Result := evaluator.Execute(boundSubAst);
|
|
end
|
|
);
|
|
|
|
// bind expanded body
|
|
var boundExpandedBody := Self.Accept(expandedBody).AsIntf<IAstNode>;
|
|
|
|
// wrap in new expansion node
|
|
var macroNode := TMacroExpansionNode.Create(Node, boundExpandedBody) as IMacroExpansionNode;
|
|
// The type of the macro node is the type of its expanded body
|
|
(macroNode as TAstNode).StaticType := (boundExpandedBody as TAstNode).StaticType;
|
|
|
|
// done
|
|
exit(TDataValue.FromIntf<IMacroExpansionNode>(macroNode));
|
|
end;
|
|
end;
|
|
|
|
// --- Default: Bind as a standard function call ---
|
|
var isTailCall := FIsTailStack.Peek;
|
|
FNextIsTail := False;
|
|
callee := Accept(Node.Callee).AsIntf<IAstNode>;
|
|
args := TransformNodes<IAstNode>(Node.Arguments);
|
|
|
|
var retType: IStaticType := TTypes.Unknown;
|
|
calleeType := (callee as TAstNode).StaticType;
|
|
if calleeType.Kind = TStaticTypeKind.stMethod then
|
|
begin
|
|
var signature := calleeType.Signature;
|
|
if Length(args) <> Length(signature.ParamTypes) then
|
|
raise ETypeException.CreateFmt('Function expects %d arguments, but got %d', [Length(signature.ParamTypes), Length(args)]);
|
|
retType := signature.ReturnType;
|
|
end;
|
|
|
|
// Check argument types (param types are not yet inferred, so skip check for now)
|
|
// for i := 0 to High(args) do
|
|
// begin
|
|
// var argType := (args[i] as TAstNode).StaticType;
|
|
// var paramType := signature.ParamTypes[i];
|
|
// if not TTypeRules.CanAssign(paramType, argType) then
|
|
// raise ETypeException.CreateFmt('Cannot assign argument %d (type %s) to parameter (type %s)', [i, argType.ToString, paramType.ToString]);
|
|
// end;
|
|
|
|
boundCall := TBoundFunctionCallNode.Create(Node, callee, args, isTailCall);
|
|
Result := SetType(TDataValue.FromIntf<IFunctionCallNode>(boundCall), retType);
|
|
end;
|
|
|
|
function TAstBinder.VisitMacroExpansionNode(const Node: IMacroExpansionNode): TDataValue;
|
|
var
|
|
boundCallee: IAstNode;
|
|
boundArgs: TArray<IAstNode>;
|
|
boundExpandedBody: IAstNode;
|
|
boundOriginalCall: IFunctionCallNode;
|
|
newMacroNode: IMacroExpansionNode;
|
|
begin
|
|
boundCallee := Accept(Node.Callee).AsIntf<IAstNode>;
|
|
boundArgs := TransformNodes<IAstNode>(Node.Arguments);
|
|
boundExpandedBody := Accept(Node.ExpandedBody).AsIntf<IAstNode>;
|
|
boundOriginalCall := TAst.FunctionCall(boundCallee, boundArgs);
|
|
newMacroNode := TMacroExpansionNode.Create(boundOriginalCall, boundExpandedBody);
|
|
|
|
// The type of the macro node is the type of its expanded body
|
|
Result := SetType(TDataValue.FromIntf<IMacroExpansionNode>(newMacroNode), (boundExpandedBody as TAstNode).StaticType);
|
|
end;
|
|
|
|
procedure TAstBinder.ExitScope;
|
|
begin
|
|
FCurrentDescriptor := FCurrentDescriptor.Parent;
|
|
end;
|
|
|
|
function TAstBinder.IsValidIdentifier(const Name: string): Boolean;
|
|
var
|
|
c: Char;
|
|
begin
|
|
if Name.IsEmpty then
|
|
exit(False);
|
|
c := Name[1];
|
|
if not (c.IsLetter or (c = '_')) then
|
|
exit(False);
|
|
for c in Name do
|
|
begin
|
|
if not (c.IsLetterOrDigit or (c = '_') or (c = '-')) then
|
|
exit(False);
|
|
end;
|
|
Result := True;
|
|
end;
|
|
|
|
function TAstBinder.VisitAssignment(const Node: IAssignmentNode): TDataValue;
|
|
var
|
|
boundIdentifier, boundValue: IAstNode;
|
|
targetType, sourceType: IStaticType;
|
|
boundNode: IAssignmentNode;
|
|
begin
|
|
FNextIsTail := False;
|
|
boundIdentifier := Accept(Node.Identifier).AsIntf<IAstNode>;
|
|
boundValue := Accept(Node.Value).AsIntf<IAstNode>;
|
|
|
|
targetType := (boundIdentifier as TAstNode).StaticType;
|
|
sourceType := (boundValue as TAstNode).StaticType;
|
|
|
|
if not TTypeRules.CanAssign(targetType, sourceType) then
|
|
raise ETypeException.CreateFmt('Cannot assign type %s to %s', [sourceType.ToString, targetType.ToString]);
|
|
|
|
boundNode := TAst.Assign(boundIdentifier as TBoundIdentifierNode, boundValue);
|
|
Result := SetType(TDataValue.FromIntf<IAssignmentNode>(boundNode), targetType);
|
|
end;
|
|
|
|
function TAstBinder.VisitBinaryExpression(const Node: IBinaryExpressionNode): TDataValue;
|
|
var
|
|
left, right: IAstNode;
|
|
leftType, rightType, resultType: IStaticType;
|
|
boundNode: IBinaryExpressionNode;
|
|
begin
|
|
FNextIsTail := False;
|
|
left := Accept(Node.Left).AsIntf<IAstNode>;
|
|
right := Accept(Node.Right).AsIntf<IAstNode>;
|
|
leftType := (left as TAstNode).StaticType;
|
|
rightType := (right as TAstNode).StaticType;
|
|
resultType := TTypeRules.ResolveBinaryOp(Node.Operator, leftType, rightType);
|
|
boundNode := TAst.BinaryExpr(left, Node.Operator, right);
|
|
Result := SetType(TDataValue.FromIntf<IBinaryExpressionNode>(boundNode), resultType);
|
|
end;
|
|
|
|
function TAstBinder.VisitBlockExpression(const Node: IBlockExpressionNode): TDataValue;
|
|
var
|
|
exprs: TArray<IAstNode>;
|
|
i: Integer;
|
|
isContextTail: Boolean;
|
|
transformedValue: TDataValue;
|
|
exprList: TList<IAstNode>;
|
|
blockType: IStaticType;
|
|
boundNode: IBlockExpressionNode;
|
|
begin
|
|
isContextTail := FIsTailStack.Peek;
|
|
exprList := TList<IAstNode>.Create;
|
|
try
|
|
for i := 0 to High(Node.Expressions) do
|
|
begin
|
|
FNextIsTail := isContextTail and (i = High(Node.Expressions));
|
|
transformedValue := Accept(Node.Expressions[i]);
|
|
if not transformedValue.IsVoid then
|
|
exprList.Add(transformedValue.AsIntf<IAstNode>);
|
|
end;
|
|
exprs := exprList.ToArray;
|
|
finally
|
|
exprList.Free;
|
|
end;
|
|
|
|
if (Length(exprs) = Length(Node.Expressions)) then
|
|
begin
|
|
var same := True;
|
|
for i := 0 to High(exprs) do
|
|
if exprs[i] <> Node.Expressions[i] then
|
|
begin
|
|
same := False;
|
|
break;
|
|
end;
|
|
if same then
|
|
begin
|
|
boundNode := Node; // Use original node
|
|
end
|
|
else
|
|
boundNode := TAst.Block(exprs); // Create new node
|
|
end
|
|
else
|
|
boundNode := TAst.Block(exprs); // Create new node
|
|
|
|
// Type of the block is the type of the last expression
|
|
if Length(exprs) > 0 then
|
|
blockType := (exprs[High(exprs)] as TAstNode).StaticType
|
|
else
|
|
blockType := TTypes.Void;
|
|
|
|
Result := SetType(TDataValue.FromIntf<IBlockExpressionNode>(boundNode), blockType);
|
|
end;
|
|
|
|
function TAstBinder.VisitConstant(const Node: IConstantNode): TDataValue;
|
|
begin
|
|
case Node.Value.Kind of
|
|
TDataValueKind.vkScalar:
|
|
Result := SetType(TDataValue.FromIntf<IConstantNode>(Node), TTypes.FromScalarKind(Node.Value.AsScalar.Kind));
|
|
TDataValueKind.vkText: Result := SetType(TDataValue.FromIntf<IConstantNode>(Node), TTypes.Text);
|
|
TDataValueKind.vkVoid: Result := SetType(TDataValue.FromIntf<IConstantNode>(Node), TTypes.Void);
|
|
TDataValueKind.vkKeyword: Result := SetType(TDataValue.FromIntf<IConstantNode>(Node), TTypes.Keyword);
|
|
else
|
|
// Handle other constant types if they become supported
|
|
Result := SetType(TDataValue.FromIntf<IConstantNode>(Node), TTypes.Unknown);
|
|
end;
|
|
end;
|
|
|
|
function TAstBinder.VisitKeyword(const Node: IKeywordNode): TDataValue;
|
|
begin
|
|
// Keywords are literals. Their type is set in TKeywordNode.Create.
|
|
Result := TDataValue.FromIntf<IKeywordNode>(Node);
|
|
end;
|
|
|
|
function TAstBinder.VisitCreateSeries(const Node: ICreateSeriesNode): TDataValue;
|
|
var
|
|
elemType: IStaticType;
|
|
begin
|
|
try
|
|
elemType := TTypes.FromScalarKind(TScalar.StringToKind(Node.Definition));
|
|
except
|
|
on E: Exception do
|
|
raise ETypeException.CreateFmt('Invalid series type definition: "%s". %s', [Node.Definition, E.Message]);
|
|
end;
|
|
Result := SetType(TDataValue.FromIntf<ICreateSeriesNode>(Node), TTypes.CreateSeries(elemType));
|
|
end;
|
|
|
|
function TAstBinder.VisitAddSeriesItem(const Node: IAddSeriesItemNode): TDataValue;
|
|
var
|
|
seriesNode, valueNode, lookbackNode: IAstNode;
|
|
seriesType, valueType: IStaticType;
|
|
begin
|
|
seriesNode := Accept(Node.Series).AsIntf<IAstNode>;
|
|
valueNode := Accept(Node.Value).AsIntf<IAstNode>;
|
|
if Node.Lookback <> nil then
|
|
lookbackNode := Accept(Node.Lookback).AsIntf<IAstNode>
|
|
else
|
|
lookbackNode := nil;
|
|
|
|
seriesType := (seriesNode as TAstNode).StaticType;
|
|
valueType := (valueNode as TAstNode).StaticType;
|
|
|
|
if seriesType.Kind <> TStaticTypeKind.stSeries then
|
|
raise ETypeException.CreateFmt('"add" requires a series as its first argument, but got %s', [seriesType.ToString]);
|
|
|
|
if not TTypeRules.CanAssign(seriesType.ElementType, valueType) then
|
|
raise ETypeException
|
|
.CreateFmt('Cannot add item of type %s to series of type %s', [valueType.ToString, seriesType.ElementType.ToString]);
|
|
|
|
if (lookbackNode <> nil) and not ((lookbackNode as TAstNode).StaticType.Kind = TStaticTypeKind.stOrdinal) then
|
|
raise ETypeException.Create('Lookback parameter for "add" must be an ordinal value.');
|
|
|
|
var boundNode := TAst.AddSeriesItem(seriesNode as TIdentifierNode, valueNode, lookbackNode);
|
|
Result := SetType(TDataValue.FromIntf<IAddSeriesItemNode>(boundNode), TTypes.Void);
|
|
end;
|
|
|
|
function TAstBinder.VisitSeriesLength(const Node: ISeriesLengthNode): TDataValue;
|
|
var
|
|
seriesNode: IAstNode;
|
|
seriesType: IStaticType;
|
|
begin
|
|
seriesNode := Accept(Node.Series).AsIntf<IAstNode>;
|
|
seriesType := (seriesNode as TAstNode).StaticType;
|
|
if (seriesType.Kind <> TStaticTypeKind.stSeries) and (seriesType.Kind <> TStaticTypeKind.stRecordSeries) then
|
|
raise ETypeException.CreateFmt('"length" requires a series, but got %s', [seriesType.ToString]);
|
|
Result := SetType(TDataValue.FromIntf<ISeriesLengthNode>(Node), TTypes.Ordinal);
|
|
end;
|
|
|
|
function TAstBinder.VisitIfExpression(const Node: IIfExpressionNode): TDataValue;
|
|
var
|
|
isContextTail: Boolean;
|
|
condition, thenBranch, elseBranch: IAstNode;
|
|
conditionType, thenType, elseType, resultType: IStaticType;
|
|
boundNode: IIfExpressionNode;
|
|
begin
|
|
isContextTail := FIsTailStack.Peek;
|
|
FNextIsTail := False;
|
|
condition := Accept(Node.Condition).AsIntf<IAstNode>;
|
|
FNextIsTail := isContextTail;
|
|
thenBranch := Accept(Node.ThenBranch).AsIntf<IAstNode>;
|
|
if Assigned(Node.ElseBranch) then
|
|
elseBranch := Accept(Node.ElseBranch).AsIntf<IAstNode>;
|
|
|
|
conditionType := (condition as TAstNode).StaticType;
|
|
if not TTypeRules.CanAssign(TTypes.Ordinal, conditionType) then
|
|
raise ETypeException.CreateFmt('If condition must be Ordinal, but got %s', [conditionType.ToString]);
|
|
|
|
thenType := (thenBranch as TAstNode).StaticType;
|
|
elseType :=
|
|
if elseBranch <> nil then (elseBranch as TAstNode).StaticType
|
|
else TTypes.Void;
|
|
resultType := TTypeRules.Promote(thenType, elseType);
|
|
|
|
if (condition <> Node.Condition) or (thenBranch <> Node.ThenBranch) or (elseBranch <> Node.ElseBranch) then
|
|
boundNode := TAst.IfExpr(condition, thenBranch, elseBranch)
|
|
else
|
|
boundNode := Node;
|
|
|
|
Result := SetType(TDataValue.FromIntf<IIfExpressionNode>(boundNode), resultType);
|
|
end;
|
|
|
|
function TAstBinder.VisitIndexer(const Node: IIndexerNode): TDataValue;
|
|
var
|
|
baseNode, indexNode: IAstNode;
|
|
baseType, indexType, elemType: IStaticType;
|
|
begin
|
|
baseNode := Accept(Node.Base).AsIntf<IAstNode>;
|
|
indexNode := Accept(Node.Index).AsIntf<IAstNode>;
|
|
baseType := (baseNode as TAstNode).StaticType;
|
|
indexType := (indexNode as TAstNode).StaticType;
|
|
|
|
elemType := TTypes.Unknown;
|
|
if (baseType.Kind <> TStaticTypeKind.stUnknown) then
|
|
begin
|
|
if (baseType.Kind <> TStaticTypeKind.stSeries) and (baseType.Kind <> TStaticTypeKind.stRecordSeries) then
|
|
raise ETypeException.CreateFmt('Indexer `[]` can only be applied to series types, but got %s', [baseType.ToString]);
|
|
|
|
if not TTypeRules.CanAssign(TTypes.Ordinal, indexType) then
|
|
raise ETypeException.CreateFmt('Indexer `[]` requires an Ordinal index, but got %s', [indexType.ToString]);
|
|
|
|
if baseType.Kind = TStaticTypeKind.stSeries then
|
|
elemType := baseType.ElementType
|
|
else // stRecordSeries
|
|
elemType := TTypes.CreateRecord(baseType.Definition);
|
|
end;
|
|
|
|
var boundNode := TAst.Indexer(baseNode, indexNode);
|
|
Result := SetType(TDataValue.FromIntf<IIndexerNode>(boundNode), elemType);
|
|
end;
|
|
|
|
function TAstBinder.VisitMemberAccess(const Node: IMemberAccessNode): TDataValue;
|
|
var
|
|
baseNode: IAstNode;
|
|
baseType, elemType: IStaticType;
|
|
fieldIndex: Integer;
|
|
begin
|
|
baseNode := Accept(Node.Base).AsIntf<IAstNode>;
|
|
baseType := (baseNode as TAstNode).StaticType;
|
|
|
|
elemType := TTypes.Unknown;
|
|
if (baseType.Kind <> TStaticTypeKind.stUnknown) then
|
|
begin
|
|
if (baseType.Kind <> TStaticTypeKind.stRecord) and (baseType.Kind <> TStaticTypeKind.stRecordSeries) then
|
|
raise ETypeException.CreateFmt('Member access requires a record or record series, but got %s', [baseType.ToString]);
|
|
|
|
// Use IndexOf(string) which correctly delegates to IndexOf(IKeyword)
|
|
fieldIndex := baseType.Definition.IndexOf(Node.Member.Value);
|
|
if fieldIndex < 0 then
|
|
raise ETypeException.CreateFmt('Member "%s" not found in type %s', [Node.Member.Value.Name, baseType.ToString]);
|
|
|
|
var fieldType := TTypes.FromScalarKind(baseType.Definition.Fields[fieldIndex].Value);
|
|
|
|
if baseType.Kind = TStaticTypeKind.stRecord then
|
|
elemType := fieldType
|
|
else // stRecordSeries
|
|
elemType := TTypes.CreateSeries(fieldType);
|
|
end;
|
|
|
|
var boundNode := TAst.MemberAccess(baseNode, Node.Member);
|
|
Result := SetType(TDataValue.FromIntf<IMemberAccessNode>(boundNode), elemType);
|
|
end;
|
|
|
|
function TAstBinder.VisitRecordLiteral(const Node: IRecordLiteralNode): TDataValue;
|
|
var
|
|
i: Integer;
|
|
boundFields: TArray<TRecordFieldLiteral>;
|
|
defFields: TArray<TScalarRecordField>;
|
|
def: IScalarRecordDefinition;
|
|
staticType: IStaticType;
|
|
boundNode: IRecordLiteralNode;
|
|
valNode: IAstNode;
|
|
valType: IStaticType;
|
|
begin
|
|
FNextIsTail := False;
|
|
SetLength(boundFields, Length(Node.Fields));
|
|
SetLength(defFields, Length(Node.Fields));
|
|
|
|
// We assume this is a TScalarRecord (Path A) until proven otherwise.
|
|
// The "dual path" logic for stDictionary is not yet implemented.
|
|
|
|
for i := 0 to High(Node.Fields) do
|
|
begin
|
|
valNode := Accept(Node.Fields[i].Value).AsIntf<IAstNode>;
|
|
valType := (valNode as TAstNode).StaticType;
|
|
|
|
// Path A: Records can only store scalar values
|
|
if not (valType.Kind in [stOrdinal, stFloat]) then
|
|
raise ETypeException.CreateFmt(
|
|
'Record fields must be scalar (Ordinal or Float), but field ":%s" is %s',
|
|
[Node.Fields[i].Key.Value.Name, valType.ToString]);
|
|
|
|
boundFields[i] := TRecordFieldLiteral.Create(Node.Fields[i].Key, valNode);
|
|
|
|
var scalarKind: TScalar.TKind;
|
|
if valType.Kind = stOrdinal then
|
|
scalarKind := TScalar.TKind.Ordinal
|
|
else
|
|
scalarKind := TScalar.TKind.Float;
|
|
|
|
// Create the definition field using the Keyword's name
|
|
defFields[i] := TScalarRecordField.Create(Node.Fields[i].Key.Value, scalarKind);
|
|
end;
|
|
|
|
def := TScalarRecordRegistry.Intern(defFields);
|
|
staticType := TTypes.CreateRecord(def);
|
|
boundNode := TBoundRecordLiteralNode.Create(boundFields, def);
|
|
|
|
Result := SetType(TDataValue.FromIntf<IRecordLiteralNode>(boundNode), staticType);
|
|
end;
|
|
|
|
function TAstBinder.VisitLambdaExpression(const Node: ILambdaExpressionNode): TDataValue;
|
|
var
|
|
i: integer;
|
|
boundParams: TArray<IIdentifierNode>;
|
|
boundBody: IAstNode;
|
|
lambdaScope: IScopeDescriptor;
|
|
upvalues: TArray<TResolvedAddress>;
|
|
hasNestedLambdas: Boolean;
|
|
lastNestedLambdaCount: Integer;
|
|
boundLambda: ILambdaExpressionNode;
|
|
bodyType, methodType: IStaticType;
|
|
paramTypes: TArray<IStaticType>;
|
|
selfSlot: Integer;
|
|
begin
|
|
FUpvalueStack.Push(TUpvalueMapping.Create);
|
|
try
|
|
EnterScope;
|
|
try
|
|
// Define placeholder for <self> (rekursion)
|
|
selfSlot := FCurrentDescriptor.Define('<self>', TTypes.Unknown);
|
|
|
|
SetLength(boundParams, Length(Node.Parameters));
|
|
SetLength(paramTypes, Length(Node.Parameters));
|
|
for i := 0 to High(Node.Parameters) do
|
|
begin
|
|
var paramNode := Node.Parameters[i];
|
|
// Parameters are not typed yet, use Unknown
|
|
var paramType := TTypes.Unknown;
|
|
var slotIndex := FCurrentDescriptor.Define(paramNode.Name, paramType);
|
|
var address := TResolvedAddress.Create(akLocalOrParent, 0, slotIndex);
|
|
boundParams[i] := TBoundIdentifierNode.Create(paramNode, address);
|
|
(boundParams[i] as TAstNode).StaticType := paramType;
|
|
paramTypes[i] := paramType;
|
|
end;
|
|
|
|
lastNestedLambdaCount := FNestedLambdaCount;
|
|
FNextIsTail := True;
|
|
boundBody := Accept(Node.Body).AsIntf<IAstNode>;
|
|
hasNestedLambdas := FNestedLambdaCount > lastNestedLambdaCount;
|
|
lambdaScope := FCurrentDescriptor;
|
|
|
|
// Now that body is bound, infer return type
|
|
bodyType := (boundBody as TAstNode).StaticType;
|
|
methodType := TTypes.CreateMethod(paramTypes, bodyType);
|
|
|
|
// Update the type for <self>
|
|
FCurrentDescriptor.UpdateType(selfSlot, methodType);
|
|
|
|
finally
|
|
ExitScope;
|
|
end;
|
|
|
|
var upvalueMapping := FUpvalueStack.Peek;
|
|
var sortedPairs := upvalueMapping.Map.ToArray;
|
|
TArray.Sort<TPair<TResolvedAddress, Integer>>(
|
|
sortedPairs,
|
|
TComparer<TPair<TResolvedAddress, Integer>>.Construct(
|
|
function(const Left, Right: TPair<TResolvedAddress, Integer>): Integer begin Result := Left.Value - Right.Value; end
|
|
)
|
|
);
|
|
SetLength(upvalues, Length(sortedPairs));
|
|
for i := 0 to High(sortedPairs) do
|
|
upvalues[i] := sortedPairs[i].Key;
|
|
finally
|
|
FUpvalueStack.Pop;
|
|
end;
|
|
|
|
inc(FNestedLambdaCount);
|
|
boundLambda := TBoundLambdaExpressionNode.Create(Node, boundBody, boundParams, lambdaScope, upvalues, hasNestedLambdas);
|
|
Result := SetType(TDataValue.FromIntf<ILambdaExpressionNode>(boundLambda), methodType);
|
|
end;
|
|
|
|
function TAstBinder.VisitRecurNode(const Node: IRecurNode): TDataValue;
|
|
begin
|
|
if not FIsTailStack.Peek then
|
|
raise Exception.Create('''recur'' can only be used in a tail position.');
|
|
FNextIsTail := False;
|
|
// TODO: Check argument count and types against current lambda signature
|
|
|
|
// 'recur' itself doesn't evaluate to a value, it jumps.
|
|
// We set its type to Void.
|
|
var boundNode := TAst.Recur(TransformNodes<IAstNode>(Node.Arguments));
|
|
Result := SetType(TDataValue.FromIntf<IRecurNode>(boundNode), TTypes.Void);
|
|
end;
|
|
|
|
function TAstBinder.VisitTernaryExpression(const Node: ITernaryExpressionNode): TDataValue;
|
|
var
|
|
isContextTail: Boolean;
|
|
condition, thenBranch, elseBranch: IAstNode;
|
|
conditionType, thenType, elseType, resultType: IStaticType;
|
|
boundNode: ITernaryExpressionNode;
|
|
begin
|
|
isContextTail := FIsTailStack.Peek;
|
|
FNextIsTail := False;
|
|
condition := Accept(Node.Condition).AsIntf<IAstNode>;
|
|
FNextIsTail := isContextTail;
|
|
thenBranch := Accept(Node.ThenBranch).AsIntf<IAstNode>;
|
|
elseBranch := Accept(Node.ElseBranch).AsIntf<IAstNode>;
|
|
|
|
conditionType := (condition as TAstNode).StaticType;
|
|
if not TTypeRules.CanAssign(TTypes.Ordinal, conditionType) then
|
|
raise ETypeException.CreateFmt('Ternary condition must be Ordinal, but got %s', [conditionType.ToString]);
|
|
|
|
thenType := (thenBranch as TAstNode).StaticType;
|
|
elseType := (elseBranch as TAstNode).StaticType;
|
|
resultType := TTypeRules.Promote(thenType, elseType);
|
|
|
|
if (condition <> Node.Condition) or (thenBranch <> Node.ThenBranch) or (elseBranch <> Node.ElseBranch) then
|
|
boundNode := TAst.TernaryExpr(condition, thenBranch, elseBranch)
|
|
else
|
|
boundNode := Node;
|
|
|
|
Result := SetType(TDataValue.FromIntf<ITernaryExpressionNode>(boundNode), resultType);
|
|
end;
|
|
|
|
function TAstBinder.VisitUnaryExpression(const Node: IUnaryExpressionNode): TDataValue;
|
|
var
|
|
right: IAstNode;
|
|
rightType, resultType: IStaticType;
|
|
boundNode: IUnaryExpressionNode;
|
|
begin
|
|
FNextIsTail := False;
|
|
right := Accept(Node.Right).AsIntf<IAstNode>;
|
|
rightType := (right as TAstNode).StaticType;
|
|
resultType := TTypeRules.ResolveUnaryOp(Node.Operator, rightType);
|
|
boundNode := TAst.UnaryExpr(Node.Operator, right);
|
|
Result := SetType(TDataValue.FromIntf<IUnaryExpressionNode>(boundNode), resultType);
|
|
end;
|
|
|
|
function TAstBinder.VisitIdentifier(const Node: IIdentifierNode): TDataValue;
|
|
var
|
|
symbol: TResolvedSymbol;
|
|
boundNode: IIdentifierNode;
|
|
adr: TResolvedAddress;
|
|
begin
|
|
symbol := FCurrentDescriptor.FindSymbol(Node.Name);
|
|
adr := symbol.Address;
|
|
|
|
if adr.Kind = akLocalOrParent then
|
|
begin
|
|
if (adr.ScopeDepth > 0) and (FUpvalueStack.Count > 0) then
|
|
begin
|
|
var upvalue := FUpvalueStack.Peek;
|
|
dec(adr.ScopeDepth); // Adjust address to be relative to the lambda's parent
|
|
var upvalueIndex: Integer;
|
|
if not upvalue.Map.TryGetValue(adr, upvalueIndex) then
|
|
begin
|
|
upvalueIndex := upvalue.Map.Count;
|
|
upvalue.Map.Add(adr, upvalueIndex);
|
|
end;
|
|
boundNode := TBoundIdentifierNode.Create(Node, TResolvedAddress.Create(akUpvalue, 0, upvalueIndex));
|
|
end
|
|
else
|
|
boundNode := TBoundIdentifierNode.Create(Node, adr);
|
|
|
|
Result := SetType(TDataValue.FromIntf<IIdentifierNode>(boundNode), symbol.StaticType);
|
|
end
|
|
else
|
|
raise Exception.CreateFmt('Undefined identifier: "%s"', [Node.Name]);
|
|
end;
|
|
|
|
function TAstBinder.VisitVariableDeclaration(const Node: IVariableDeclarationNode): TDataValue;
|
|
var
|
|
initializer: IAstNode;
|
|
slotIndex: Integer;
|
|
address: TResolvedAddress;
|
|
boundIdentifier: IIdentifierNode;
|
|
isBoxed: Boolean;
|
|
boundDecl: IVariableDeclarationNode;
|
|
initType: IStaticType;
|
|
begin
|
|
if not IsValidIdentifier(Node.Identifier.Name) then
|
|
raise Exception.CreateFmt('Invalid identifier name: "%s".', [Node.Identifier.Name]);
|
|
|
|
FNextIsTail := False;
|
|
initializer := nil;
|
|
if Node.Initializer <> nil then
|
|
begin
|
|
initializer := Accept(Node.Initializer).AsIntf<IAstNode>;
|
|
initType := (initializer as TAstNode).StaticType;
|
|
end
|
|
else
|
|
initType := TTypes.Void; // Default type if no initializer
|
|
|
|
slotIndex := FCurrentDescriptor.Define(Node.Identifier.Name, initType);
|
|
address := TResolvedAddress.Create(akLocalOrParent, 0, slotIndex);
|
|
boundIdentifier := TBoundIdentifierNode.Create(Node.Identifier, address);
|
|
(boundIdentifier as TAstNode).StaticType := initType;
|
|
|
|
isBoxed := (FBoxedDeclarations <> nil) and FBoxedDeclarations.Contains(Node);
|
|
boundDecl := TBoundVariableDeclarationNode.Create(boundIdentifier, initializer, isBoxed);
|
|
Result := SetType(TDataValue.FromIntf<IVariableDeclarationNode>(boundDecl), initType);
|
|
end;
|
|
|
|
end.
|