| 词条 | First-class message |
| 释义 |
In object-oriented programming, a programming language is said to have first-class messages or dynamic messages if in a method call not only the receiving object and parameter list can be varied dynamically (i.e. bound to a variable or computed as an expression) but also the specific method invoked. Typed object-oriented programming languages, such as Java and C++, often do not support first-class methods.[1] Smalltalk only support them in an untyped way.[2] In Objective-C (Cocoa), you can use NSInvocation to represent first-class messages in a way that is aware of the types at runtime; however, safe use still relies on the programmer. Some theoretical progress has been made to support first-class messages in a type-safe manner, but none of the proposed systems has been implemented in a programming language, possibly due to their complexity.[3] See also
Notes1. ^Shroff & Smith 2. ^Shroff & Smith 3. ^Shroff & Smith References
2 : Object-oriented programming|Subroutines |
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