Type Definition javascriptcore_sys::JSObjectSetPropertyCallback

pub type JSObjectSetPropertyCallback = Option<unsafe extern "C" fn(ctx: JSContextRef, object: JSObjectRef, propertyName: JSStringRef, value: JSValueRef, exception: *mut JSValueRef) -> bool>;

The callback invoked when setting a property’s value.

• ctx: The execution context to use.
• object: The JSObject on which to set the property’s value.
• propertyName: A JSString containing the name of the property to set.
• value: A JSValue to use as the property’s value.
• exception: A pointer to a JSValueRef in which to return an exception, if any.

Returns true if the property was set, otherwise false.

If you named your function SetProperty, you would declare it like this:

bool
SetProperty(JSContextRef ctx, JSObjectRef object,
            JSStringRef propertyName, JSValueRef value,
            JSValueRef* exception);

If this function returns false, the set request forwards to object’s statically declared properties, then its parent class chain (which includes the default object class).