可重载的操作符，摘录自c++ primer第四版 表14.1：
|
+ |
- |
* |
/ |
% |
^ |
|
& |
| |
~ |
! |
, |
= |
|
< |
> |
<= |
>= |
++ |
-- |
|
<< |
>> |
== |
!= |
&& |
|| |
|
+= |
-= |
/= |
%= |
^= |
&= |
|
|= |
*= |
<<= |
>>= |
[] |
() |
|
-> |
->* |
new |
new [] |
delete |
delete [] |
c++中可以重载运算符，有两种实现形式，成员函数和非成员函数。
如何选择，之前记得有本书里直接有个推荐形式的表，没找到。先把《exceptional c++》第20条中写的文字摘录下来：
The standard requires that operators = () [] and -> must be members, and class-specific operators new, new[], delete, and delete[] must be static members.
For all other functions:
if the function is operator>> or operator<< for stream I/O,
or if it needs type conversions on its leftmost argument,
or if it can be implemented using the class's public interface alone,
make it a nonmember (and friend if needed in the first two cases)
if it needs to behave virtually,
add a virtual member function to provide the virtual behavior, and implement it in terms of that
else
make it a member
看了这个描述，感觉还是要把那个表找到啊。。。