jsconfig.h

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#define JS_HAS_INITIALIZERS     0       /* has var o = {'foo': 42, 'bar':3} */
#define JS_HAS_OBJ_WATCHPOINT   0       /* has o.watch and o.unwatch */
#define JS_HAS_EXPORT_IMPORT    0       /* has export fun; import obj.fun */
#define JS_HAS_EVAL_THIS_SCOPE  0       /* Math.eval is same as with (Math) */
#define JS_HAS_TRIPLE_EQOPS     0       /* has === and !== identity eqops */
#define JS_HAS_SHARP_VARS       0       /* has #n=, #n# for object literals */
#define JS_HAS_REPLACE_LAMBDA   0       /* has string.replace(re, lambda) */
#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_EXCEPTIONS       0       /* has exception handling */
#define JS_HAS_UNDEFINED        0       /* has global "undefined" property */
#define JS_HAS_TOSOURCE         0       /* has Object/Array toSource method */
#define JS_HAS_IN_OPERATOR      0       /* has in operator ('p' in {p:1}) */
#define JS_HAS_INSTANCEOF       0       /* has {p:1} instanceof Object */
#define JS_HAS_ARGS_OBJECT      0       /* has minimal ECMA arguments object */
#define JS_HAS_DEBUGGER_KEYWORD 0       /* has hook for debugger keyword */
#define JS_HAS_ERROR_EXCEPTIONS 0       /* has error object hierarchy */
#define JS_HAS_CATCH_GUARD      0       /* has exception handling catch guard */
#define JS_HAS_NEW_OBJ_METHODS  0       /* has Object.prototype query methods */
#define JS_HAS_SPARSE_ARRAYS    0       /* array methods preserve empty elems */
#define JS_HAS_DFLT_MSG_STRINGS 1       /* provides English error messages */
#define JS_HAS_NUMBER_FORMATS   0       /* numbers have formatting methods */
#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    0       /* has o.item(i) = j; for native item */
#define JS_HAS_NO_SUCH_METHOD   0       /* has o.__noSuchMethod__ handler */

#elif JS_VERSION == 110

#define JS_BUG_NULL_INDEX_PROPS 1       /* o[0] defaults to null, not void */
#define JS_BUG_EMPTY_INDEX_ZERO 1       /* o[""] is equivalent to o[0] */
#define JS_BUG_EAGER_TOSTRING   1       /* o.toString() trumps o.valueOf() */
#define JS_BUG_VOID_TOSTRING    0       /* void 0 + 0 == "undefined0" */
#define JS_BUG_EVAL_THIS_FUN    1       /* eval('this') in function f is f */
#define JS_BUG_EVAL_THIS_SCOPE  1       /* Math.eval('sin(x)') vs. local x */
#define JS_BUG_FALLIBLE_EQOPS   1       /* fallible/intransitive equality ops */
#define JS_BUG_FALLIBLE_TONUM   1       /* fallible ValueToNumber primitive */
#define JS_BUG_WITH_CLOSURE     0       /* with(o)function f(){} sets o.f */

#define JS_HAS_PROP_DELETE      0       /* delete o.p removes p from o */
#define JS_HAS_CALL_OBJECT      0       /* fun.caller is stack frame obj */
#define JS_HAS_LABEL_STATEMENT  0       /* has break/continue to label: */
#define JS_HAS_DO_WHILE_LOOP    0       /* has do {...} while (b) */
#define JS_HAS_SWITCH_STATEMENT 0       /* has switch (v) {case c: ...} */
#define JS_HAS_SOME_PERL_FUN    1       /* has array.join/reverse/sort */
#define JS_HAS_MORE_PERL_FUN    0       /* has array.push, str.substr, etc */
#define JS_HAS_STR_HTML_HELPERS 1       /* has str.anchor, str.bold, etc. */
#define JS_HAS_PERL_SUBSTR      0       /* has str.substr */
#define JS_HAS_VALUEOF_HINT     0       /* valueOf(hint) where hint is typeof */
#define JS_HAS_LEXICAL_CLOSURE  0       /* nested functions, lexically closed */
#define JS_HAS_APPLY_FUNCTION   0       /* has apply(fun, arg1, ... argN) */
#define JS_HAS_CALL_FUNCTION    0       /* has fun.call(obj, arg1, ... argN) */
#define JS_HAS_OBJ_PROTO_PROP   0       /* has o.__proto__ etc. */
#define JS_HAS_REGEXPS          0       /* has perl r.e.s via RegExp, /pat/ */
#define JS_HAS_SEQUENCE_OPS     0       /* has array.slice, string.concat */
#define JS_HAS_INITIALIZERS     0       /* has var o = {'foo': 42, 'bar':3} */
#define JS_HAS_OBJ_WATCHPOINT   0       /* has o.watch and o.unwatch */
#define JS_HAS_EXPORT_IMPORT    0       /* has export fun; import obj.fun */
#define JS_HAS_EVAL_THIS_SCOPE  0       /* Math.eval is same as with (Math) */
#define JS_HAS_TRIPLE_EQOPS     0       /* has === and !== identity eqops */
#define JS_HAS_SHARP_VARS       0       /* has #n=, #n# for object literals */
#define JS_HAS_REPLACE_LAMBDA   0       /* has string.replace(re, lambda) */
#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_EXCEPTIONS       0       /* has exception handling */
#define JS_HAS_UNDEFINED        0       /* has global "undefined" property */
#define JS_HAS_TOSOURCE         0       /* has Object/Array toSource method */
#define JS_HAS_IN_OPERATOR      0       /* has in operator ('p' in {p:1}) */
#define JS_HAS_INSTANCEOF       0       /* has {p:1} instanceof Object */
#define JS_HAS_ARGS_OBJECT      0       /* has minimal ECMA arguments object */
#define JS_HAS_DEBUGGER_KEYWORD 0       /* has hook for debugger keyword */
#define JS_HAS_ERROR_EXCEPTIONS 0       /* has error object hierarchy */
#define JS_HAS_CATCH_GUARD      0       /* has exception handling catch guard */
#define JS_HAS_NEW_OBJ_METHODS  0       /* has Object.prototype query methods */
#define JS_HAS_SPARSE_ARRAYS    0       /* array methods preserve empty elems */
#define JS_HAS_DFLT_MSG_STRINGS 1       /* provides English error messages */
#define JS_HAS_NUMBER_FORMATS   0       /* numbers have formatting methods */
#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    0       /* has o.item(i) = j; for native item */
#define JS_HAS_NO_SUCH_METHOD   0       /* has o.__noSuchMethod__ handler */

#elif JS_VERSION == 120

#define JS_BUG_NULL_INDEX_PROPS 0       /* o[0] defaults to null, not void */
#define JS_BUG_EMPTY_INDEX_ZERO 0       /* o[""] is equivalent to o[0] */
#define JS_BUG_EAGER_TOSTRING   0       /* o.toString() trumps o.valueOf() */
#define JS_BUG_VOID_TOSTRING    1       /* void 0 + 0 == "undefined0" */
#define JS_BUG_EVAL_THIS_FUN    0       /* eval('this') in function f is f */
#define JS_BUG_EVAL_THIS_SCOPE  0       /* Math.eval('sin(x)') vs. local x */
#define JS_BUG_FALLIBLE_EQOPS   0       /* fallible/intransitive equality ops */
#define JS_BUG_FALLIBLE_TONUM   0       /* fallible ValueToNumber primitive */
#define JS_BUG_WITH_CLOSURE     1       /* with(o)function f(){} sets o.f */

#define JS_HAS_PROP_DELETE      1       /* delete o.p removes p from o */
#define JS_HAS_CALL_OBJECT      1       /* fun.caller is stack frame obj */
#define JS_HAS_LABEL_STATEMENT  1       /* has break/continue to label: */
#define JS_HAS_DO_WHILE_LOOP    1       /* has do {...} while (b) */
#define JS_HAS_SWITCH_STATEMENT 1       /* has switch (v) {case c: ...} */
#define JS_HAS_SOME_PERL_FUN    1       /* has array.join/reverse/sort */
#define JS_HAS_MORE_PERL_FUN    1       /* has array.push, str.substr, etc */
#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_VALUEOF_HINT     1       /* valueOf(hint) where hint is typeof */
#define JS_HAS_LEXICAL_CLOSURE  1       /* nested functions, lexically closed */
#define JS_HAS_APPLY_FUNCTION   1       /* has apply(fun, arg1, ... argN) */
#define JS_HAS_CALL_FUNCTION    0       /* has fun.call(obj, arg1, ... argN) */
#define JS_HAS_OBJ_PROTO_PROP   1       /* has o.__proto__ etc. */
#define JS_HAS_REGEXPS          1       /* has perl r.e.s via RegExp, /pat/ */
#define JS_HAS_SEQUENCE_OPS     1       /* has array.slice, string.concat */
#define JS_HAS_INITIALIZERS     1       /* has var o = {'foo': 42, 'bar':3} */
#define JS_HAS_OBJ_WATCHPOINT   1       /* has o.watch and o.unwatch */
#define JS_HAS_EXPORT_IMPORT    1       /* has export fun; import obj.fun */
#define JS_HAS_EVAL_THIS_SCOPE  1       /* Math.eval is same as with (Math) */
#define JS_HAS_TRIPLE_EQOPS     0       /* has === and !== identity eqops */
#define JS_HAS_SHARP_VARS       0       /* has #n=, #n# for object literals */
#define JS_HAS_REPLACE_LAMBDA   0       /* has string.replace(re, lambda) */
#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_EXCEPTIONS       0       /* has exception handling */
#define JS_HAS_UNDEFINED        0       /* has global "undefined" property */
#define JS_HAS_TOSOURCE         0       /* has Object/Array toSource method */
#define JS_HAS_IN_OPERATOR      0       /* has in operator ('p' in {p:1}) */
#define JS_HAS_INSTANCEOF       0       /* has {p:1} instanceof Object */
#define JS_HAS_ARGS_OBJECT      0       /* has minimal ECMA arguments object */
#define JS_HAS_DEBUGGER_KEYWORD 0       /* has hook for debugger keyword */
#define JS_HAS_ERROR_EXCEPTIONS 0       /* has error object hierarchy */
#define JS_HAS_CATCH_GUARD      0       /* has exception handling catch guard */
#define JS_HAS_NEW_OBJ_METHODS  0       /* has Object.prototype query methods */
#define JS_HAS_SPARSE_ARRAYS    0       /* array methods preserve empty elems */
#define JS_HAS_DFLT_MSG_STRINGS 1       /* provides English error messages */
#define JS_HAS_NUMBER_FORMATS   0       /* numbers have formatting methods */
#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    0       /* has o.item(i) = j; for native item */
#define JS_HAS_NO_SUCH_METHOD   0       /* has o.__noSuchMethod__ handler */

#elif JS_VERSION == 130

#define JS_BUG_NULL_INDEX_PROPS 0       /* o[0] defaults to null, not void */
#define JS_BUG_EMPTY_INDEX_ZERO 0       /* o[""] is equivalent to o[0] */
#define JS_BUG_EAGER_TOSTRING   0       /* o.toString() trumps o.valueOf() */
#define JS_BUG_VOID_TOSTRING    0       /* void 0 + 0 == "undefined0" */
#define JS_BUG_EVAL_THIS_FUN    0       /* eval('this') in function f is f */
#define JS_BUG_EVAL_THIS_SCOPE  0       /* Math.eval('sin(x)') vs. local x */
#define JS_BUG_FALLIBLE_EQOPS   0       /* fallible/intransitive equality ops */
#define JS_BUG_FALLIBLE_TONUM   0       /* fallible ValueToNumber primitive */
#define JS_BUG_WITH_CLOSURE     1       /* with(o)function f(){} sets o.f */

#define JS_HAS_PROP_DELETE      1       /* delete o.p removes p from o */
#define JS_HAS_CALL_OBJECT      1       /* fun.caller is stack frame obj */
#define JS_HAS_LABEL_STATEMENT  1       /* has break/continue to label: */
#define JS_HAS_DO_WHILE_LOOP    1       /* has do {...} while (b) */
#define JS_HAS_SWITCH_STATEMENT 1       /* has switch (v) {case c: ...} */
#define JS_HAS_SOME_PERL_FUN    1       /* has array.join/reverse/sort */