Original
The @ operator
The @
operator returns the address of a variable, or of a function, procedure, or
method; that is, @ constructs a pointer to its operand. For more
information about pointers, see Pointers and pointer types.
The following rules apply to @.
· If X is a variable, @X returns the address of X. (Special
rules apply when X is a procedural variable; see Procedural
types in statements and expressions.) The type of @X is Pointer
if the default {$T-} compiler directive is in effect. In the {$T+}
state, @X is of type ^T, where T is the type of X.
· If F is a routine (a function or procedure), @F returns F’s
entry point. The type of @F is always Pointer.
· When @ is applied to a method defined in a class, the method
identifier must be qualified with the class name. For example,
@TMyClass.DoSomething
points to the DoSomething method of TMyClass. For more information about classes and methods, see Classes and objects.
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译文
地址（@）运算符
@运算符返回变量、函数、过程或方法的地址；也就是说，@对其操作数构造了一个指针。有关指针的更多信息，见指针和指针类型。下列规则适用于@运算符。
· 如果X是一个变量，那么@X返回X的地址。（当X是程序型变量时适用特殊规则，见语句和表达式中的程序型类型。）当编译指示
{$T-} 有效时，@X是Pointer类型。而在编译指示 {$T+} 状态下时，@X是 ^T 类型，这里的T是X的类型。
· 如果 F 是一个例程（函数或过程），那么@F返回 F 的入口点，@F的类型总是Pointer。
· 当
@ 适用于定义在类中的方法时，方法标识符必需被类的名称限定。例如
@TMyClass.DoSomething
指向TMyClass类的DoSomething方法。更多关于类和方法的信息，见类和对象。
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