2 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "FunctionConstructor.h"
24 #include "FunctionPrototype.h"
25 #include "JSFunction.h"
26 #include "JSGlobalObject.h"
35 ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
37 FunctionConstructor::FunctionConstructor(ExecState* exec, PassRefPtr<Structure> structure, FunctionPrototype* functionPrototype)
38 : InternalFunction(&exec->globalData(), structure, Identifier(exec, functionPrototype->classInfo()->className))
40 putDirectWithoutTransition(exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
42 // Number of arguments for constructor
43 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontDelete | DontEnum);
46 static JSObject* constructWithFunctionConstructor(ExecState* exec, JSObject*, const ArgList& args)
48 return constructFunction(exec, args);
51 ConstructType FunctionConstructor::getConstructData(ConstructData& constructData)
53 constructData.native.function = constructWithFunctionConstructor;
54 return ConstructTypeHost;
57 static JSValuePtr callFunctionConstructor(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
59 return constructFunction(exec, args);
62 // ECMA 15.3.1 The Function Constructor Called as a Function
63 CallType FunctionConstructor::getCallData(CallData& callData)
65 callData.native.function = callFunctionConstructor;
69 FunctionBodyNode* extractFunctionBody(ProgramNode* program)
74 StatementVector& children = program->children();
75 if (children.size() != 1)
78 ExprStatementNode* exprStatement = static_cast<ExprStatementNode*>(children[0].get());
79 ASSERT(exprStatement->isExprStatement());
80 if (!exprStatement || !exprStatement->isExprStatement())
83 FuncExprNode* funcExpr = static_cast<FuncExprNode*>(exprStatement->expr());
84 ASSERT(funcExpr->isFuncExprNode());
85 if (!funcExpr || !funcExpr->isFuncExprNode())
88 FunctionBodyNode* body = funcExpr->body();
93 // ECMA 15.3.2 The Function Constructor
94 JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
98 program = "(function(){})";
99 else if (args.size() == 1)
100 program = "(function(){" + args.at(exec, 0).toString(exec) + "})";
102 program = "(function(" + args.at(exec, 0).toString(exec);
103 for (size_t i = 1; i < args.size() - 1; i++)
104 program += "," + args.at(exec, i).toString(exec);
105 program += "){" + args.at(exec, args.size() - 1).toString(exec) + "})";
110 SourceCode source = makeSource(program, sourceURL, lineNumber);
111 RefPtr<ProgramNode> programNode = exec->globalData().parser->parse<ProgramNode>(exec, exec->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
113 FunctionBodyNode* body = extractFunctionBody(programNode.get());
115 return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
117 JSGlobalObject* globalObject = exec->lexicalGlobalObject();
118 ScopeChain scopeChain(globalObject, globalObject->globalData(), exec->globalThisValue());
119 return new (exec) JSFunction(exec, functionName, body, scopeChain.node());
122 // ECMA 15.3.2 The Function Constructor
123 JSObject* constructFunction(ExecState* exec, const ArgList& args)
125 return constructFunction(exec, args, Identifier(exec, "anonymous"), UString(), 1);