JS_FS 编辑

Macros for describing functions, for use with JS_DefineProperties and JS_InitClass.

Syntax

#define JS_FS(name,call,nargs,flags) ...
#define JS_FN(name,call,nargs,flags) ...
#define JS_SYM_FN(symbol,call,nargs,flags) ... // Added in SpiderMonkey 38
#define JS_FNINFO(name,call,info,nargs,flags) ... // Added in SpiderMonkey 17
#define JS_SELF_HOSTED_FN(name,selfHostedName,nargs,flags) ... // Added in SpiderMonkey 31
#define JS_SELF_HOSTED_SYM_FN(symbol, selfHostedName, nargs, flags) ... // Added in SpiderMonkey 38
#define JS_SYM_FNSPEC(symbol, call, info, nargs, flags, selfHostedName) ... // Added in SpiderMonkey 38
#define JS_FNSPEC(name,call,info,nargs,flags,selfHostedName) ... // Added in SpiderMonkey 31

#define JS_FS_END ...

Description

Use these macros to define an array of JSFunctionSpecs to pass to JS_DefineFunctions or JS_InitClass.

JS_FN (whose name pays homage to the old JSNative/JSFastNative split) simply adds the flag JSFUN_STUB_GSOPS. JS_FNINFO allows the simple adding of JSJitInfos. JS_SELF_HOSTED_FN declares a self-hosted function. Finally JS_FNSPEC has slots for all the fields.

The _SYM variants allow defining a function with a symbol key rather than a string key. For example, use JS_SYM_FN(iterator, ...) to define an @@iterator method. (In builds without ES6 symbols, it defines a method with the string id "@@iterator".)

See an example in the JSAPI User Guide.

See Also

• MXR ID Search for JS_FS
• MXR ID Search for JS_FN
• MXR ID Search for JS_SYM_FN
• MXR ID Search for JS_FNINFO
• MXR ID Search for JS_SELF_HOSTED_FN
• MXR ID Search for JS_SELF_HOSTED_SYM_FN
• MXR ID Search for JS_SYM_FNSPEC
• MXR ID Search for JS_FNSPEC
• MXR ID Search for JS_FS_END
• JSFunctionSpec
• JS_DefineProperties
• JS_InitClass
• bug 775788 - added JS_FNINFO.
• bug 920433 - added JS_SELF_HOSTED_FN and JS_FNSPEC.
• bug 1082672 - added JS_SYM_FN JS_SELF_HOSTED_SYM_FN JS_SYM_FNSPEC.