Normally, in a typed language, the dispatch mechanism will be performed based on the type of the arguments (most commonly based on the type of the receiver of a message). This might be dubbed 'per-type dynamic dispatch'. Languages with weak or no typing systems often carry a dispatch table as part of the object data for each object. This allows instance behaviour as each instance may map a given message to a separate method.
c++是静态绑定
Late binding, or dynamic binding, is a computer programming mechanism in which the method being called upon an object or the function being called with arguments is looked up by name at .
With , or , in an object-oriented language, the compilation phase fixes all types of variables and expressions. This is usually stored in the compiled program as an offset in a ("v-table") and is very efficient. With late binding the compiler does not read enough information to verify the method exists or bind its slot on the v-table. Instead the method is looked up by name at runtime.
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