JS::AutoSaveExceptionState 编辑
This article covers features introduced in SpiderMonkey 31
Save and later restore the current exception state of a given JSContext.
Syntax
JS::AutoSaveExceptionState(JSContext *cx);
| Name | Type | Description |
|---|---|---|
cx | JSContext * | Pointer to a JS context from which to derive runtime information. Requires request. In a JS_THREADSAFE build, the caller must be in a request on this JSContext. |
Description
JS::AutoSaveExceptionState saves and later restores the current exception state of a given JSContext.
This is useful for implementing behavior in C++ that's like try/catch or try/finally in JS.
Example
// Typical usage:
bool ok = JS::Evaluate(cx, ...);
AutoSaveExceptionState savedExc(cx);
... cleanup that might re-enter JS ...
return ok;See Also
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