Michael Schimmel
780 lines
26 KiB
ObjectPascal
780 lines
26 KiB
ObjectPascal
unit Myc.Ast.RTL;
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interface
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// This unit is intended to be included in a 'uses' clause.
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// It self-registers its functions via its initialization section.
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uses
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System.SysUtils,
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System.Generics.Collections,
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System.Generics.Defaults,
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System.Rtti,
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Myc.Data.Scalar,
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Myc.Data.Value,
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Myc.Ast,
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Myc.Ast.Scope,
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Myc.Ast.Nodes,
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Myc.Ast.Types;
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type
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// Defines the export parameters for a native RTL function.
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TRtlExportAttribute = class(TCustomAttribute)
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type
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TPurity = (Pure, Impure);
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public
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Name: string;
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IsPure: Boolean;
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constructor Create(const AName: string); overload;
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constructor Create(const AName: string; APurity: TPurity); overload;
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end;
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// Defines the key for the static bootstrap cache.
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type
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TStaticSignatureKey = record
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public
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Name: string;
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ArgTypes: TArray<IStaticType>;
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constructor Create(const AName: string; const AArgTypes: TArray<IStaticType>);
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end;
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// Comparer for the static signature key
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TStaticSignatureKeyComparer = class(TEqualityComparer<TStaticSignatureKey>)
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public
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function Equals(const Left, Right: TStaticSignatureKey): Boolean; override;
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function GetHashCode(const Value: TStaticSignatureKey): Integer; override;
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end;
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TSpecializedMethod = record
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public
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Target: TDataValue.TFunc;
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ReturnType: IStaticType;
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IsPure: Boolean;
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constructor Create(const ATarget: TDataValue.TFunc; const AReturnType: IStaticType; AIsPure: Boolean);
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end;
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// The cache holding TDataValue.TFunc wrappers for static native functions.
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TStaticBootstrapCache = TDictionary<TStaticSignatureKey, TSpecializedMethod>;
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TRtlFunctionInfo = class
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public
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DynamicWrapper: TDataValue.TFunc;
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Signatures: TList<IMethodSignature>;
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constructor Create;
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destructor Destroy; override;
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end;
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TRtlFunctionMap = TDictionary<string, TRtlFunctionInfo>;
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//--------------------------------------------------------------------------------------------------
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//== Library Registration (RTTI-based)
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//--------------------------------------------------------------------------------------------------
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// A helper record to encapsulate the RTTI-based registration logic.
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TRtlRegistry = record
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type
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// --- Static Wrapper Signatures ---
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TNativeFunc_O_O = function(A: Int64): Int64;
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TNativeFunc_F_F = function(A: Double): Double;
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TNativeFunc_F_O = function(A: Double): Int64;
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TNativeFunc_OO_O = function(A, B: Int64): Int64;
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TNativeFunc_OO_F = function(A, B: Int64): Double;
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TNativeFunc_FF_F = function(A, B: Double): Double;
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TNativeFunc_FF_O = function(A, B: Double): Int64;
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TNativeFunc_OF_F = function(A: Int64; B: Double): Double;
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TNativeFunc_OF_O = function(A: Int64; B: Double): Int64;
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TNativeFunc_FO_F = function(A: Double; B: Int64): Double;
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TNativeFunc_FO_O = function(A: Double; B: Int64): Int64;
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TNativeFunc_TT_T = function(const A: String; const B: String): String;
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private
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class var
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FStaticBootstrap: TStaticBootstrapCache;
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class var
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FStaticFuncMap: TRtlFunctionMap;
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class constructor Create;
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class destructor Destroy;
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// --- Wrapper Creation Helpers ---
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class function CreateWrapper_O_O(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_F_F(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_F_O(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_OO_O(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_OO_F(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_FF_F(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_FF_O(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_OF_F(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_OF_O(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_FO_F(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_FO_O(CodeAddress: Pointer): TDataValue.TFunc; static;
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class function CreateWrapper_TT_T(CodeAddress: Pointer): TDataValue.TFunc; static;
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// --- RTTI Helpers ---
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class function RttiTypeToStaticType(const AType: TRttiType): IStaticType; static;
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class function ParseStaticSuffix(
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const AMethodName: string;
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out AArgTypes: TArray<IStaticType>;
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out AReturnType: IStaticType
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): Boolean; static;
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public
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class procedure RegisterAll(const AScope: IExecutionScope); static;
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class function CreateStaticWrapper(
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method: TRttiMethod;
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retType: IStaticType;
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argTypes: TArray<IStaticType>;
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rttiParams: TArray<TRttiParameter>
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): TDataValue.TFunc; static;
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// Public accessor for the TStaticSpecializer
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class function GetStaticSpecialization(const AName: string; const AArgTypes: TArray<IStaticType>): TSpecializedMethod; static;
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class procedure RegisterStaticSpecialization(
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const AName: string;
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const AArgTypes: TArray<IStaticType>;
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const AMethod: TSpecializedMethod
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); static;
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end;
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procedure RegisterRtlFunctions(const AScope: IExecutionScope);
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implementation
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uses
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System.TypInfo,
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System.Hash,
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System.StrUtils,
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Myc.Ast.RTL.Core;
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type
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TNativeDataValueFunc = function(const Args: TArray<TDataValue>): TDataValue;
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TNativeScalarFunc = function(Arg: TScalar): TScalar;
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//--------------------------------------------------------------------------------------------------
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//== Native Function Implementation (Core Logic)
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//--------------------------------------------------------------------------------------------------
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constructor TRtlExportAttribute.Create(const AName: string);
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begin
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inherited Create;
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Self.Name := AName;
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Self.IsPure := False; // Default to impure (safe)
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end;
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constructor TRtlExportAttribute.Create(const AName: string; APurity: TPurity);
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begin
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inherited Create;
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Self.Name := AName;
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Self.IsPure := APurity = Pure;
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end;
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{ TStaticSignatureKey }
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constructor TStaticSignatureKey.Create(const AName: string; const AArgTypes: TArray<IStaticType>);
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begin
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Name := AName;
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ArgTypes := AArgTypes;
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end;
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{ TStaticSignatureKeyComparer }
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function TStaticSignatureKeyComparer.Equals(const Left, Right: TStaticSignatureKey): Boolean;
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var
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i: Integer;
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begin
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if Left.Name <> Right.Name then
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exit(False);
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if Length(Left.ArgTypes) <> Length(Right.ArgTypes) then
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exit(False);
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// Compare types
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for i := 0 to High(Left.ArgTypes) do
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begin
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if not Left.ArgTypes[i].IsEqual(Right.ArgTypes[i]) then
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exit(False);
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end;
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Result := True;
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end;
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function TStaticSignatureKeyComparer.GetHashCode(const Value: TStaticSignatureKey): Integer;
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var
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i: Integer;
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hash: Integer;
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ptrHash: Integer;
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begin
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// 1. Hash the function name to get the initial value
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hash := THashBobJenkins.GetHashValue(Value.Name);
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// 2. Iteratively combine the hash of each argument type
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for i := 0 to High(Value.ArgTypes) do
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begin
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if Assigned(Value.ArgTypes[i]) then
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ptrHash := Value.ArgTypes[i].GetHashCode
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else
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ptrHash := 0;
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hash := THashBobJenkins.GetHashValue(ptrHash, SizeOf(Integer), hash);
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end;
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Result := hash;
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end;
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{ TRtlFunctionInfo }
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constructor TRtlFunctionInfo.Create;
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begin
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inherited Create;
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Signatures := TList<IMethodSignature>.Create;
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DynamicWrapper := nil;
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end;
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destructor TRtlFunctionInfo.Destroy;
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begin
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Signatures.Free;
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inherited Destroy;
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end;
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{ TSpecializedMethod }
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constructor TSpecializedMethod.Create(const ATarget: TDataValue.TFunc; const AReturnType: IStaticType; AIsPure: Boolean);
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begin
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Target := ATarget;
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ReturnType := AReturnType;
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IsPure := AIsPure;
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end;
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{ TRtlRegistry }
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class constructor TRtlRegistry.Create;
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var
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ctx: TRttiContext;
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rtlType: TRttiType;
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method: TRttiMethod;
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attribute: TCustomAttribute;
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exportAttr: TRtlExportAttribute;
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rtlName: string;
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argTypes: TArray<IStaticType>;
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retType: IStaticType;
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methodRecord: TSpecializedMethod;
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funcInfo: TRtlFunctionInfo;
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rttiParams: TArray<TRttiParameter>;
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isDynamic: Boolean;
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i: Integer;
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begin
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// 1. Create global caches
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FStaticBootstrap := TStaticBootstrapCache.Create(TStaticSignatureKeyComparer.Create);
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FStaticFuncMap := TRtlFunctionMap.Create;
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// 2. Perform RTTI Scan
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ctx := TRttiContext.Create;
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try
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rtlType := ctx.GetType(TypeInfo(TRtlFunctions));
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for method in rtlType.GetMethods do
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begin
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if method.MethodKind <> mkClassFunction then
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continue;
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exportAttr := nil;
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for attribute in method.GetAttributes do
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begin
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if attribute is TRtlExportAttribute then
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begin
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exportAttr := attribute as TRtlExportAttribute;
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break;
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end;
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end;
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if not Assigned(exportAttr) then
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continue;
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rtlName := exportAttr.Name;
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if not FStaticFuncMap.TryGetValue(rtlName, funcInfo) then
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begin
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funcInfo := TRtlFunctionInfo.Create;
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FStaticFuncMap.Add(rtlName, funcInfo);
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end;
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// Check Signature Type (Dynamic vs Static)
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rttiParams := method.GetParameters;
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isDynamic :=
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(Length(rttiParams) = 1)
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and (method.ReturnType.Handle = TypeInfo(TDataValue))
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and (rttiParams[0].ParamType.Handle = TypeInfo(TArray<TDataValue>));
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if isDynamic then
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begin
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if Assigned(funcInfo.DynamicWrapper) then
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raise EInvalidOpException.CreateFmt('Duplicate dynamic fallback defined for %s', [rtlName]);
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var wrapperFactory :=
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function(CodeAddress: Pointer): TDataValue.TFunc
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begin
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Result :=
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function(const Args: TArray<TDataValue>): TDataValue
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begin
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Result := TNativeDataValueFunc(CodeAddress)(Args);
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end;
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end;
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funcInfo.DynamicWrapper := wrapperFactory(method.CodeAddress);
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end
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else
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begin
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// This is a STATIC SPECIALIZATION
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if not ParseStaticSuffix(method.Name, argTypes, retType) then
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begin
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SetLength(argTypes, Length(rttiParams));
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for i := 0 to High(rttiParams) do
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argTypes[i] := RttiTypeToStaticType(rttiParams[i].ParamType);
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retType := RttiTypeToStaticType(method.ReturnType);
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end;
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var sig := TMethodSignature.Create(argTypes, retType);
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funcInfo.Signatures.Add(sig);
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var wrapper := CreateStaticWrapper(method, retType, argTypes, rttiParams);
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if Assigned(wrapper) then
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begin
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methodRecord := TSpecializedMethod.Create(wrapper, retType, exportAttr.IsPure);
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RegisterStaticSpecialization(rtlName, argTypes, methodRecord);
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// If this is a generic wrapper (e.g. Abs(TScalar)) and no DynamicWrapper exists yet,
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// use this wrapper as the interpreter fallback!
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if (not Assigned(funcInfo.DynamicWrapper)) and (Length(argTypes) = 1) and (argTypes[0].Kind = stUnknown) then
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begin
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funcInfo.DynamicWrapper := wrapper;
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end
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else if (not Assigned(funcInfo.DynamicWrapper)) and (Length(argTypes) = 2) and (argTypes[0].Kind = stUnknown) then
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begin
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// Potentially handle 2-arg scalar wrappers here too if needed
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end;
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end
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else
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raise ENotImplemented.CreateFmt('Static native method wrapper for %s() not implemented', [method.Name]);
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end;
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end;
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finally
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ctx.Free;
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end;
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end;
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class destructor TRtlRegistry.Destroy;
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var
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funcInfo: TRtlFunctionInfo;
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begin
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for funcInfo in FStaticFuncMap.Values do
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funcInfo.Free;
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FStaticFuncMap.Free;
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FStaticBootstrap.Free;
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end;
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class function TRtlRegistry.GetStaticSpecialization(const AName: string; const AArgTypes: TArray<IStaticType>): TSpecializedMethod;
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var
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key: TStaticSignatureKey;
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begin
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key.Name := AName;
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key.ArgTypes := AArgTypes;
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FStaticBootstrap.TryGetValue(key, Result);
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end;
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class procedure TRtlRegistry.RegisterStaticSpecialization(
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const AName: string;
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const AArgTypes: TArray<IStaticType>;
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const AMethod: TSpecializedMethod
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);
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var
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key: TStaticSignatureKey;
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begin
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key := TStaticSignatureKey.Create(AName, AArgTypes);
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FStaticBootstrap.AddOrSetValue(key, AMethod);
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end;
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class function TRtlRegistry.RttiTypeToStaticType(const AType: TRttiType): IStaticType;
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begin
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if not Assigned(AType) then
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exit(TTypes.Unknown);
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if AType.Handle = TypeInfo(Int64) then
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Result := TTypes.Ordinal
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else if AType.Handle = TypeInfo(Double) then
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Result := TTypes.Float
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else if AType.Handle = TypeInfo(string) then
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Result := TTypes.Text
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else if (AType.Handle = TypeInfo(TScalar)) or (AType.Handle = TypeInfo(TDataValue)) then
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Result := TTypes.Unknown
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else
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Result := TTypes.Unknown;
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end;
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class function TRtlRegistry.ParseStaticSuffix(
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const AMethodName: string;
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out AArgTypes: TArray<IStaticType>;
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out AReturnType: IStaticType
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): Boolean;
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var
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parts: TArray<string>;
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i: Integer;
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t: IStaticType;
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function ParseType(const S: string): IStaticType;
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begin
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if SameText(S, 'Ordinal') then
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Result := TTypes.Ordinal
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else if SameText(S, 'Float') then
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Result := TTypes.Float
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else if SameText(S, 'Keyword') then
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Result := TTypes.Keyword
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else if SameText(S, 'Boolean') then
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Result := TTypes.Boolean
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else if SameText(S, 'DateTime') then
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Result := TTypes.DateTime
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else
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Result := TTypes.Unknown;
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end;
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begin
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Result := False;
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AReturnType := TTypes.Unknown;
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AArgTypes := nil;
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parts := AMethodName.Split(['_']);
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if Length(parts) < 2 then
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exit;
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AReturnType := ParseType(parts[High(parts)]);
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if AReturnType.Kind = stUnknown then
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exit;
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SetLength(AArgTypes, Length(parts) - 2);
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if Length(AArgTypes) = 0 then
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begin
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Result := True;
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exit;
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end;
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for i := 1 to High(parts) - 1 do
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begin
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t := ParseType(parts[i]);
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if t.Kind = stUnknown then
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begin
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AArgTypes := nil;
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AReturnType := TTypes.Unknown;
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exit(False);
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end;
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AArgTypes[i - 1] := t;
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end;
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Result := True;
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end;
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class procedure TRtlRegistry.RegisterAll(const AScope: IExecutionScope);
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var
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rtlName: string;
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funcInfo: TRtlFunctionInfo;
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staticType: IStaticType;
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pair: TPair<string, TRtlFunctionInfo>;
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begin
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for pair in FStaticFuncMap do
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begin
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rtlName := pair.Key;
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funcInfo := pair.Value;
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if funcInfo.Signatures.Count > 0 then
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staticType := TTypes.CreateMethodSet(funcInfo.Signatures.ToArray)
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else
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staticType := nil;
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var wrapper := funcInfo.DynamicWrapper; // Default is Void
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AScope.Define(rtlName, wrapper, staticType);
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end;
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end;
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// --- Wrapper Generation ---
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class function TRtlRegistry.CreateWrapper_O_O(CodeAddress: Pointer): TDataValue.TFunc;
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begin
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Result :=
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function(const Args: TArray<TDataValue>): TDataValue
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var
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A: Int64;
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Res: Int64;
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begin
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A := Args[0].AsScalar.Value.AsInt64;
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Res := TNativeFunc_O_O(CodeAddress)(A);
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Result := TDataValue(TScalar.FromInt64(Res));
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end;
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end;
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class function TRtlRegistry.CreateWrapper_F_F(CodeAddress: Pointer): TDataValue.TFunc;
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begin
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Result :=
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function(const Args: TArray<TDataValue>): TDataValue
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var
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A: Double;
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Res: Double;
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begin
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A := Args[0].AsScalar.Value.AsDouble;
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Res := TNativeFunc_F_F(CodeAddress)(A);
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Result := TDataValue(TScalar.FromDouble(Res));
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end;
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end;
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class function TRtlRegistry.CreateWrapper_F_O(CodeAddress: Pointer): TDataValue.TFunc;
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begin
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Result :=
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function(const Args: TArray<TDataValue>): TDataValue
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var
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A: Double;
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Res: Int64;
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begin
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A := Args[0].AsScalar.Value.AsDouble;
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Res := TNativeFunc_F_O(CodeAddress)(A);
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Result := TDataValue(TScalar.FromInt64(Res));
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end;
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end;
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class function TRtlRegistry.CreateWrapper_OO_O(CodeAddress: Pointer): TDataValue.TFunc;
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begin
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Result :=
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function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A, B, Res: Int64;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsInt64;
|
|
B := Args[1].AsScalar.Value.AsInt64;
|
|
Res := TNativeFunc_OO_O(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromInt64(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_OO_F(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A, B: Int64;
|
|
Res: Double;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsInt64;
|
|
B := Args[1].AsScalar.Value.AsInt64;
|
|
Res := TNativeFunc_OO_F(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromDouble(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_FF_F(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A, B, Res: Double;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsDouble;
|
|
B := Args[1].AsScalar.Value.AsDouble;
|
|
Res := TNativeFunc_FF_F(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromDouble(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_FF_O(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A, B: Double;
|
|
Res: Int64;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsDouble;
|
|
B := Args[1].AsScalar.Value.AsDouble;
|
|
Res := TNativeFunc_FF_O(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromInt64(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_OF_F(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A: Int64;
|
|
B: Double;
|
|
Res: Double;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsInt64;
|
|
B := Args[1].AsScalar.Value.AsDouble;
|
|
Res := TNativeFunc_OF_F(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromDouble(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_OF_O(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A: Int64;
|
|
B: Double;
|
|
Res: Int64;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsInt64;
|
|
B := Args[1].AsScalar.Value.AsDouble;
|
|
Res := TNativeFunc_OF_O(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromInt64(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_FO_F(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A: Double;
|
|
B: Int64;
|
|
Res: Double;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsDouble;
|
|
B := Args[1].AsScalar.Value.AsInt64;
|
|
Res := TNativeFunc_FO_F(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromDouble(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_FO_O(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A: Double;
|
|
B: Int64;
|
|
Res: Int64;
|
|
begin
|
|
A := Args[0].AsScalar.Value.AsDouble;
|
|
B := Args[1].AsScalar.Value.AsInt64;
|
|
Res := TNativeFunc_FO_O(CodeAddress)(A, B);
|
|
Result := TDataValue(TScalar.FromInt64(Res));
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateWrapper_TT_T(CodeAddress: Pointer): TDataValue.TFunc;
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
A: String;
|
|
B: String;
|
|
begin
|
|
A := Args[0].AsText;
|
|
B := Args[1].AsText;
|
|
Result := TNativeFunc_TT_T(CodeAddress)(A, B);
|
|
end;
|
|
end;
|
|
|
|
class function TRtlRegistry.CreateStaticWrapper(
|
|
method: TRttiMethod;
|
|
retType: IStaticType;
|
|
argTypes: TArray<IStaticType>;
|
|
rttiParams: TArray<TRttiParameter>
|
|
): TDataValue.TFunc;
|
|
var
|
|
ptr: Pointer;
|
|
begin
|
|
Result := nil;
|
|
ptr := method.CodeAddress;
|
|
|
|
// --- 1-Argument Functions ---
|
|
if Length(argTypes) = 1 then
|
|
begin
|
|
if (argTypes[0].Kind = stOrdinal) and (retType.Kind = stOrdinal) then
|
|
Result := CreateWrapper_O_O(ptr)
|
|
else if (argTypes[0].Kind = stFloat) and (retType.Kind = stFloat) then
|
|
Result := CreateWrapper_F_F(ptr)
|
|
else if (argTypes[0].Kind = stFloat) and (retType.Kind = stOrdinal) then
|
|
Result := CreateWrapper_F_O(ptr)
|
|
else if (argTypes[0].Kind = stUnknown) and (rttiParams[0].ParamType.Handle = TypeInfo(TScalar)) then
|
|
begin
|
|
// This is the wrapper for: class function(Arg: TScalar): TScalar;
|
|
var wrapperFactory :=
|
|
function(CodeAddress: Pointer): TDataValue.TFunc
|
|
begin
|
|
Result :=
|
|
function(const Args: TArray<TDataValue>): TDataValue
|
|
var
|
|
argScalar: TScalar;
|
|
begin
|
|
if (Length(Args) <> 1) or (Args[0].Kind <> vkScalar) then
|
|
raise EArgumentException.Create('Invalid argument for TScalar function.');
|
|
argScalar := Args[0].AsScalar;
|
|
Result := TDataValue(TNativeScalarFunc(CodeAddress)(argScalar));
|
|
end;
|
|
end;
|
|
Result := wrapperFactory(ptr);
|
|
end;
|
|
end
|
|
// --- 2-Argument Functions ---
|
|
else if Length(argTypes) = 2 then
|
|
begin
|
|
var k1 := argTypes[0].Kind;
|
|
var k2 := argTypes[1].Kind;
|
|
var rk := retType.Kind;
|
|
|
|
if (k1 = stOrdinal) and (k2 = stOrdinal) then
|
|
begin
|
|
if rk = stOrdinal then
|
|
Result := CreateWrapper_OO_O(ptr)
|
|
else if rk = stFloat then
|
|
Result := CreateWrapper_OO_F(ptr); // Divide
|
|
end
|
|
else if (k1 = stFloat) and (k2 = stFloat) then
|
|
begin
|
|
if rk = stFloat then
|
|
Result := CreateWrapper_FF_F(ptr)
|
|
else if rk = stOrdinal then
|
|
Result := CreateWrapper_FF_O(ptr); // Comparisons
|
|
end
|
|
else if (k1 = stOrdinal) and (k2 = stFloat) then
|
|
begin
|
|
if rk = stFloat then
|
|
Result := CreateWrapper_OF_F(ptr)
|
|
else if rk = stOrdinal then
|
|
Result := CreateWrapper_OF_O(ptr); // Comparisons
|
|
end
|
|
else if (k1 = stFloat) and (k2 = stOrdinal) then
|
|
begin
|
|
if rk = stFloat then
|
|
Result := CreateWrapper_FO_F(ptr)
|
|
else if rk = stOrdinal then
|
|
Result := CreateWrapper_FO_O(ptr); // Comparisons
|
|
end
|
|
else if (k1 = stKeyword) and (k2 = stKeyword) and (rk = stOrdinal) then
|
|
begin
|
|
// Keywords are passed as Int64 (index)
|
|
Result := CreateWrapper_OO_O(ptr); // e.g. Equal_Keyword_Keyword
|
|
end
|
|
else if (k1 = stText) and (k2 = stText) then
|
|
begin
|
|
Result := CreateWrapper_TT_T(ptr); // e.g. String concat
|
|
end
|
|
end;
|
|
end;
|
|
|
|
procedure RegisterRtlFunctions(const AScope: IExecutionScope);
|
|
begin
|
|
AScope.Define('true', TDataValue(TScalar.FromBoolean(True)), TTypes.Boolean);
|
|
AScope.Define('false', TDataValue(TScalar.FromBoolean(False)), TTypes.Boolean);
|
|
|
|
TRtlRegistry.RegisterAll(AScope);
|
|
end;
|
|
|
|
initialization
|
|
// Register this library's functions with the central AST factory.
|
|
TAst.RegisterLibrary(RegisterRtlFunctions);
|
|
|
|
end.
|