Statically forbid polymorphic recursion.
静态禁止多态递归。
This type will be used later to dispatch polymorphic behavior.
稍后，我们将利用这种类型来分派多态行为。
Probing of overloaded and polymorphic functions is not supported.
不支持探测重载和多态的函数。
An even better definition of polymorphic record is presented below.
下面给出一个更好的多态记录的定义。
You saw an example of a polymorphic association earlier in Address.
在之前的Address，您已经看到了多态关联的示例。
Listing 15 Improved polymorphic definition of Facebook Special user.
清单15Facebook特殊用户的改进多态定义。
Listing 11 Improved polymorphic definition of Facebook Special user.
清单11Facebook特殊用户的改进多态定义。
The following definitions can be used to create a polymorphic record.
下面的定义可用于创建一个多态的纪录。
Here's an example involving polymorphic recursion across two classes.
下面的示例涉及两个类之间的多态递归。
Listing 13 Result of execution of polymorphic Facebook user record test.
清单13多态Facebook用户记录测试的执行结果。
Three or more tables are involved. A polymorphic query generates SQL like
涉及三张或更多的表，多态查询生成的SQL是这样的
Protocols allow you to define polymorphic functions over preexisting types.
协议允许您在先前存在的类型上定义多态函数。
This constraint disqualifies the use of this analysis for polymorphic viruses.
由于有此约束，图中的分析不能用于多态病毒。
These proteins are highly “polymorphic” i.e., they show variation in different individuals.
这些蛋白高度多态。 例如，它们在不同的人中显示差异。
The more serious problem is the potential for polymorphic recursion in class definitions.
更严重的问题是类定义中可能存在多态递归。
Why don't we issue a command to the compiler like "statically forbid polymorphic recursion."
为什么我们不向编译器发出类似“静态禁止多态递归”这样的命令呢？
Listing 16 Result of execution of polymorphic Facebook user record test with extended definition.
清单16多态Facebook用户记录对扩展定义测试的执行结果。
Factory pattern is a common pattern for creation of polymorphic objects of different concrete types.
工厂模式是根据不同类型创建多态对象的一个常见方法。
Here are some of the more common SPU intrinsics (types are not given as most of them are polymorphic).
下面是比较常见的一些SPUintrinsic(类型没有给出，这是因为它们大多为多态)。
After all, the ability to add such polymorphic methods is one of the key advantages of an object-oriented language.
毕竟，添加这种多态方法的能力是面向对象语言的关键优势之一。
I think this symmetry in polymorphic dispatch on multiple arguments is much more elegant than is the prior style.
我认为对多个参数进行多态分派所具有的这种对称性比先前的样式要雅致得多。
Listing 17 Result of execution of polymorphic Facebook user record test with extended definition and JSON encoding.
清单17应用JSON编码多态Facebook用户记录对扩展定义测试的执行结果。
Scala is statically typed which allows it to provide generic classes, inner classes and even polymorphic methods.
Scala是静态类型的，这就允许它提供泛型类、内部类、甚至多态方法（Polymorphic Method）。
But assuming the types are okay, the code path is chosen first by a polymorphic dispatch, and second by procedural switch.
但是假定类型没问题，那么代码路径首先由多态分派选中，其次由过程切换选中。
ActiveRecord has a feature called polymorphic associations that is ideal for attaching common behavior to a class without inheritance.
ActiveRecord具有一种称为多态关联的特性，非常适合将通用行为附加给类，完全无需继承。
This fact may be obfuscated by our simple example earlier in which the polymorphic recursion occurs as a simple, direct self-reference.
我们先前的简单示例(其中，多态递归作为一个简单直接的自引用发生)会使这一事实变得模糊。
This is classic polymorphic behavior - different implementations (different XML parsing algorithms) that provide the same behavior.
这是一种典型的多态行为—提供相同行为的不同实现(不同的xml解析算法)。
Just like static detection of bad generic constructor calls, forbidding polymorphic recursion conflicts with incremental class compilation.
就象静态检测糟糕的泛型构造函数调用一样，禁止多态递归会与递增式类编译发生冲突。
Haskell also has subtypes and is completely polymorphic; these features go beyond this article's scope, but they're worth exploring on your own if you're interested.
Haskell还有子类型，而且完全是多态的；这些特性超出了本文的范围，但如果您对此感兴趣，它们也值得研究。
Perl is happily polymorphic: prices are Numbers while calculating the 20% price increase, but if you write them back as strings they remain in whatever format you wrote them in.
Perl具有很方便的多态性：在将价格提高20%时，价格是数字；但是，如果将它们作为字符串写回，它们会保持您所指定的格式。
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