Use of it modifier suppresses an effective derived category off further overriding the property. The brand new accessors away from a shut possessions also are closed.
With the exception of variations in declaration and you will invocation syntax, virtual, sealed, bypass, and you will abstract accessors perform just like digital, closed, override and you can conceptual steps. Specifically, the rules explained inside the §fourteen.6.4, §14.6.5, §14.six.six, and you can §14.6.eight use as if accessors had been methods of a matching mode:
- A get accessor represents an effective parameterless strategy having a profit property value the house form of and the same modifiers as the with which has possessions.
- A flat accessor represents a strategy with just one value factor of the house particular, a gap return variety of, additionally the same modifiers once the with assets.
X are an online understand-simply property, Y try a virtual realize-build property, and Z is a conceptual understand-establish property. As Z are conceptual, the latest who has class A should be also stated conceptual.
Right here, this new declarations out of X , Y , and you will Z try overriding property declarations. Each possessions report exactly fits the new usage of modifiers, sort of, and label of your corresponding inherited assets. The new get accessor out of X as well as the lay accessor of Y make use of the legs search term to gain access to brand new handed down accessors. The newest statement of Z overrides one another abstract accessors-thus, there are no an excellent abstract means people in B , and B are allowed to be a low-abstract class. prevent example
When a property is announced just like the a keen bypass, one overridden accessors will be open to the fresh new overriding password. At exactly the same time, the stated accessibility off both possessions otherwise indexer alone, as well as the brand new accessors, will match compared to the fresh overridden associate and you will accessors.
14.8.step one Standard
An event is a member that enables an object otherwise category to add notifications. Subscribers is attach executable code to possess events of the supplying feel handlers.
A conference_report start from a set of features (§21) and you can a valid blend of the brand new five supply modifiers (§fourteen.3.6), the (§fourteen.step three.5), static (§fourteen.six.step 3, §fourteen.8.4), digital (§14.six.4, §14.8.5), bypass (§14.6.5, §14.8.5), close (§fourteen.six.6), conceptual (§14.six.7, §fourteen.8.5), and extern (§fourteen.six.8) modifiers.
The type of a conference squirt report is going to be a outsource_sort of (§8.2.8), and this outsource_kind of will likely be at the very least as obtainable due to the fact experience by itself (§7.5.5).
14.8 Events
An event statement may include knowledge_accessor_declarations. not, in the event it will not, getting non-extern, non-abstract events, the compiler shall also have him or her automatically (§14.8.2); for extern occurrences, the newest accessors are given on the outside.
A conference declaration you to definitely omits event_accessor_declarations defines one or more incidents-you to definitely per of one’s changeable_declarators. Brand new functions and you may modifiers apply at most of the people declared of the eg an event_report.
When an event declaration includes a keen extern modifier, the big event is alleged to-be an outward feel. Because an outward feel declaration will bring not any execution, it is a blunder because of it to provide both extern modifier and you will experience_accessor_declarations.
It is a compile-go out mistake getting a variable_declarator of a meeting report that have an abstract or outside modifier to incorporate an adjustable_initializer.
A conference may be used due to the fact left-hands operand of the += and you can -= operators. These workers are used, respectively, to attach feel handlers to help you, or perhaps to reduce event handlers of a conference, while the supply modifiers of one’s experience manage this new contexts into the and this such as operations are permitted.
Truly the only operations that will be enabled into the an event from the code that is beyond your enter in hence one knowledge are stated, try += and you will -= . Therefore, if you find yourself such as code could add and remove handlers getting an event, it cannot yourself see otherwise customize the fundamental set of skills handlers.
Into the a process of the setting x += y otherwise x –= y , whenever x is an event the consequence of the newest procedure has actually style of gap (§.4) (instead of obtaining the sort of x , for the property value x following project, in terms of other the latest += and -= operators discussed with the non-experiences brands). This prevents additional code away from ultimately examining the fundamental delegate of an event.
