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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+ * JS configuration macros.
+ */
+#ifndef JS_VERSION
+#define JS_VERSION 180
+#endif
+
+/*
+ * Compile-time JS version configuration. The JS version numbers lie on the
+ * number line like so:
+ *
+ * 1.0 1.1 1.2 1.3 1.4 ECMAv3 1.5 1.6 1.7 1.8
+ * ^ ^
+ * | |
+ * basis for ECMAv1 close to ECMAv2
+ *
+ * where ECMAv3 stands for ECMA-262 Edition 3. See the runtime version enum
+ * JSVersion in jspubtd.h. Code in the engine can therefore count on version
+ * <= JSVERSION_1_4 to mean "before the Third Edition of ECMA-262" and version
+ * > JSVERSION_1_4 to mean "at or after the Third Edition".
+ *
+ * In the (likely?) event that SpiderMonkey grows to implement JavaScript 2.0,
+ * or ECMA-262 Edition 4 (JS2 without certain extensions), the version number
+ * to use would be near 200, or greater.
+ *
+ * The JS_VERSION_ECMA_3 version is the minimal configuration conforming to
+ * the ECMA-262 Edition 3 specification. Use it for minimal embeddings, where
+ * you're sure you don't need any of the extensions disabled in this version.
+ * In order to facilitate testing, JS_HAS_OBJ_PROTO_PROP is defined as part of
+ * the JS_VERSION_ECMA_3_TEST version.
+ *
+ * To keep things sane in the modern age, where we need exceptions in order to
+ * implement, e.g., iterators and generators, we are dropping support for all
+ * versions <= 1.4.
+ */
+#define JS_VERSION_ECMA_3 148
+#define JS_VERSION_ECMA_3_TEST 149
+
+#if JS_VERSION == JS_VERSION_ECMA_3 || \
+ JS_VERSION == JS_VERSION_ECMA_3_TEST
+
+#define JS_HAS_STR_HTML_HELPERS 0 /* has str.anchor, str.bold, etc. */
+#define JS_HAS_PERL_SUBSTR 0 /* has str.substr */
+#if JS_VERSION == JS_VERSION_ECMA_3_TEST
+#define JS_HAS_OBJ_PROTO_PROP 1 /* has o.__proto__ etc. */
+#else
+#define JS_HAS_OBJ_PROTO_PROP 0 /* has o.__proto__ etc. */
+#endif
+#define JS_HAS_OBJ_WATCHPOINT 0 /* has o.watch and o.unwatch */
+#define JS_HAS_EVAL_THIS_SCOPE 0 /* Math.eval is same as with (Math) */
+#define JS_HAS_SHARP_VARS 0 /* has #n=, #n# for object literals */
+#define JS_HAS_SCRIPT_OBJECT 0 /* has (new Script("x++")).exec() */
+#define JS_HAS_XDR 0 /* has XDR API and internal support */
+#define JS_HAS_XDR_FREEZE_THAW 0 /* has XDR freeze/thaw script methods */
+#define JS_HAS_TOSOURCE 0 /* has Object/Array toSource method */
+#define JS_HAS_DEBUGGER_KEYWORD 0 /* has hook for debugger keyword */
+#define JS_HAS_CATCH_GUARD 0 /* has exception handling catch guard */
+#define JS_HAS_SPARSE_ARRAYS 0 /* array methods preserve empty elems */
+#define JS_HAS_GETTER_SETTER 0 /* has JS2 getter/setter functions */
+#define JS_HAS_UNEVAL 0 /* has uneval() top-level function */
+#define JS_HAS_CONST 0 /* has JS2 const as alternative var */
+#define JS_HAS_FUN_EXPR_STMT 0 /* has function expression statement */
+#define JS_HAS_LVALUE_RETURN 1 /* has o.item(i) = j; for native item */
+#define JS_HAS_NO_SUCH_METHOD 0 /* has o.__noSuchMethod__ handler */
+#define JS_HAS_XML_SUPPORT 0 /* has ECMAScript for XML support */
+#define JS_HAS_ARRAY_EXTRAS 0 /* has indexOf and Lispy extras */
+#define JS_HAS_GENERATORS 0 /* has yield in generator function */
+#define JS_HAS_BLOCK_SCOPE 0 /* has block scope via let/arraycomp */
+#define JS_HAS_DESTRUCTURING 0 /* has [a,b] = ... or {p:a,q:b} = ... */
+#define JS_HAS_GENERATOR_EXPRS 0 /* has (expr for (lhs in iterable)) */
+#define JS_HAS_EXPR_CLOSURES 0 /* has function (formals) listexpr */
+
+#elif JS_VERSION < 150
+
+#error "unsupported JS_VERSION"
+
+#elif JS_VERSION == 150
+
+#define JS_HAS_STR_HTML_HELPERS 1 /* has str.anchor, str.bold, etc. */
+#define JS_HAS_PERL_SUBSTR 1 /* has str.substr */
+#define JS_HAS_OBJ_PROTO_PROP 1 /* has o.__proto__ etc. */
+#define JS_HAS_OBJ_WATCHPOINT 1 /* has o.watch and o.unwatch */
+#define JS_HAS_EVAL_THIS_SCOPE 1 /* Math.eval is same as with (Math) */
+#define JS_HAS_SHARP_VARS 1 /* has #n=, #n# for object literals */
+#define JS_HAS_SCRIPT_OBJECT 1 /* has (new Script("x++")).exec() */
+#define JS_HAS_XDR 1 /* has XDR API and internal support */
+#define JS_HAS_XDR_FREEZE_THAW 0 /* has XDR freeze/thaw script methods */
+#define JS_HAS_TOSOURCE 1 /* has Object/Array toSource method */
+#define JS_HAS_DEBUGGER_KEYWORD 1 /* has hook for debugger keyword */
+#define JS_HAS_CATCH_GUARD 1 /* has exception handling catch guard */
+#define JS_HAS_SPARSE_ARRAYS 0 /* array methods preserve empty elems */
+#define JS_HAS_GETTER_SETTER 1 /* has JS2 getter/setter functions */
+#define JS_HAS_UNEVAL 1 /* has uneval() top-level function */
+#define JS_HAS_CONST 1 /* has JS2 const as alternative var */
+#define JS_HAS_FUN_EXPR_STMT 1 /* has function expression statement */
+#define JS_HAS_LVALUE_RETURN 1 /* has o.item(i) = j; for native item */
+#define JS_HAS_NO_SUCH_METHOD 1 /* has o.__noSuchMethod__ handler */
+#define JS_HAS_XML_SUPPORT 0 /* has ECMAScript for XML support */
+#define JS_HAS_ARRAY_EXTRAS 0 /* has indexOf and Lispy extras */
+#define JS_HAS_GENERATORS 0 /* has yield in generator function */
+#define JS_HAS_BLOCK_SCOPE 0 /* has block scope via let/arraycomp */
+#define JS_HAS_DESTRUCTURING 0 /* has [a,b] = ... or {p:a,q:b} = ... */
+#define JS_HAS_GENERATOR_EXPRS 0 /* has (expr for (lhs in iterable)) */
+#define JS_HAS_EXPR_CLOSURES 0 /* has function (formals) listexpr */
+
+#elif JS_VERSION == 160
+
+#define JS_HAS_STR_HTML_HELPERS 1 /* has str.anchor, str.bold, etc. */
+#define JS_HAS_PERL_SUBSTR 1 /* has str.substr */
+#define JS_HAS_OBJ_PROTO_PROP 1 /* has o.__proto__ etc. */
+#define JS_HAS_OBJ_WATCHPOINT 1 /* has o.watch and o.unwatch */
+#define JS_HAS_EVAL_THIS_SCOPE 1 /* Math.eval is same as with (Math) */
+#define JS_HAS_SHARP_VARS 1 /* has #n=, #n# for object literals */
+#define JS_HAS_SCRIPT_OBJECT 1 /* has (new Script("x++")).exec() */
+#define JS_HAS_XDR 1 /* has XDR API and internal support */
+#define JS_HAS_XDR_FREEZE_THAW 0 /* has XDR freeze/thaw script methods */
+#define JS_HAS_TOSOURCE 1 /* has Object/Array toSource method */
+#define JS_HAS_DEBUGGER_KEYWORD 1 /* has hook for debugger keyword */
+#define JS_HAS_CATCH_GUARD 1 /* has exception handling catch guard */
+#define JS_HAS_SPARSE_ARRAYS 0 /* array methods preserve empty elems */
+#define JS_HAS_GETTER_SETTER 1 /* has JS2 getter/setter functions */
+#define JS_HAS_UNEVAL 1 /* has uneval() top-level function */
+#define JS_HAS_CONST 1 /* has JS2 const as alternative var */
+#define JS_HAS_FUN_EXPR_STMT 1 /* has function expression statement */
+#define JS_HAS_LVALUE_RETURN 1 /* has o.item(i) = j; for native item */
+#define JS_HAS_NO_SUCH_METHOD 1 /* has o.__noSuchMethod__ handler */
+#define JS_HAS_XML_SUPPORT 1 /* has ECMAScript for XML support */
+#define JS_HAS_ARRAY_EXTRAS 1 /* has indexOf and Lispy extras */
+#define JS_HAS_GENERATORS 0 /* has yield in generator function */
+#define JS_HAS_BLOCK_SCOPE 0 /* has block scope via let/arraycomp */
+#define JS_HAS_DESTRUCTURING 0 /* has [a,b] = ... or {p:a,q:b} = ... */
+#define JS_HAS_GENERATOR_EXPRS 0 /* has (expr for (lhs in iterable)) */
+#define JS_HAS_EXPR_CLOSURES 0 /* has function (formals) listexpr */
+
+#elif JS_VERSION == 170
+
+#define JS_HAS_STR_HTML_HELPERS 1 /* has str.anchor, str.bold, etc. */
+#define JS_HAS_PERL_SUBSTR 1 /* has str.substr */
+#define JS_HAS_OBJ_PROTO_PROP 1 /* has o.__proto__ etc. */
+#define JS_HAS_OBJ_WATCHPOINT 1 /* has o.watch and o.unwatch */
+#define JS_HAS_EVAL_THIS_SCOPE 1 /* Math.eval is same as with (Math) */
+#define JS_HAS_SHARP_VARS 1 /* has #n=, #n# for object literals */
+#define JS_HAS_SCRIPT_OBJECT 0 /* has (new Script("x++")).exec() */
+#define JS_HAS_XDR 1 /* has XDR API and internal support */
+#define JS_HAS_XDR_FREEZE_THAW 0 /* has XDR freeze/thaw script methods */
+#define JS_HAS_TOSOURCE 1 /* has Object/Array toSource method */
+#define JS_HAS_DEBUGGER_KEYWORD 1 /* has hook for debugger keyword */
+#define JS_HAS_CATCH_GUARD 1 /* has exception handling catch guard */
+#define JS_HAS_SPARSE_ARRAYS 0 /* array methods preserve empty elems */
+#define JS_HAS_GETTER_SETTER 1 /* has JS2 getter/setter functions */
+#define JS_HAS_UNEVAL 1 /* has uneval() top-level function */
+#define JS_HAS_CONST 1 /* has JS2 const as alternative var */
+#define JS_HAS_FUN_EXPR_STMT 1 /* has function expression statement */
+#define JS_HAS_LVALUE_RETURN 1 /* has o.item(i) = j; for native item */
+#define JS_HAS_NO_SUCH_METHOD 1 /* has o.__noSuchMethod__ handler */
+#define JS_HAS_XML_SUPPORT 1 /* has ECMAScript for XML support */
+#define JS_HAS_ARRAY_EXTRAS 1 /* has indexOf and Lispy extras */
+#define JS_HAS_GENERATORS 1 /* has yield in generator function */
+#define JS_HAS_BLOCK_SCOPE 1 /* has block scope via let/arraycomp */
+#define JS_HAS_DESTRUCTURING 1 /* has [a,b] = ... or {p:a,q:b} = ... */
+#define JS_HAS_GENERATOR_EXPRS 0 /* has (expr for (lhs in iterable)) */
+#define JS_HAS_EXPR_CLOSURES 0 /* has function (formals) listexpr */
+
+#elif JS_VERSION == 180
+
+#define JS_HAS_STR_HTML_HELPERS 1 /* has str.anchor, str.bold, etc. */
+#define JS_HAS_PERL_SUBSTR 1 /* has str.substr */
+#define JS_HAS_OBJ_PROTO_PROP 1 /* has o.__proto__ etc. */
+#define JS_HAS_OBJ_WATCHPOINT 1 /* has o.watch and o.unwatch */
+#define JS_HAS_EVAL_THIS_SCOPE 1 /* Math.eval is same as with (Math) */
+#define JS_HAS_SHARP_VARS 1 /* has #n=, #n# for object literals */
+#define JS_HAS_SCRIPT_OBJECT 0 /* has (new Script("x++")).exec() */
+#define JS_HAS_XDR 1 /* has XDR API and internal support */
+#define JS_HAS_XDR_FREEZE_THAW 0 /* has XDR freeze/thaw script methods */
+#define JS_HAS_TOSOURCE 1 /* has Object/Array toSource method */
+#define JS_HAS_DEBUGGER_KEYWORD 1 /* has hook for debugger keyword */
+#define JS_HAS_CATCH_GUARD 1 /* has exception handling catch guard */
+#define JS_HAS_SPARSE_ARRAYS 0 /* array methods preserve empty elems */
+#define JS_HAS_GETTER_SETTER 1 /* has JS2 getter/setter functions */
+#define JS_HAS_UNEVAL 1 /* has uneval() top-level function */
+#define JS_HAS_CONST 1 /* has JS2 const as alternative var */
+#define JS_HAS_FUN_EXPR_STMT 1 /* has function expression statement */
+#define JS_HAS_LVALUE_RETURN 1 /* has o.item(i) = j; for native item */
+#define JS_HAS_NO_SUCH_METHOD 1 /* has o.__noSuchMethod__ handler */
+#define JS_HAS_XML_SUPPORT 1 /* has ECMAScript for XML support */
+#define JS_HAS_ARRAY_EXTRAS 1 /* has indexOf and Lispy extras */
+#define JS_HAS_GENERATORS 1 /* has yield in generator function */
+#define JS_HAS_BLOCK_SCOPE 1 /* has block scope via let/arraycomp */
+#define JS_HAS_DESTRUCTURING 2 /* has [a,b] = ... or {p:a,q:b} = ... */
+#define JS_HAS_GENERATOR_EXPRS 1 /* has (expr for (lhs in iterable)) */
+#define JS_HAS_EXPR_CLOSURES 1 /* has function (formals) listexpr */
+
+#else
+
+#error "unknown JS_VERSION"
+
+#endif
+
+/* Features that are present in all versions. */
+#define JS_HAS_RESERVED_JAVA_KEYWORDS 1
+#define JS_HAS_RESERVED_ECMA_KEYWORDS 1
+
+/* Feature-test macro for evolving destructuring support. */
+#define JS_HAS_DESTRUCTURING_SHORTHAND (JS_HAS_DESTRUCTURING == 2)