Re: [問題] 谷哥coding style的學習
※ 引述《rosemary0401 (rosemary)》之銘言：
: 最近再看google的coding style
: http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml
: 有些地方不是很懂
: <Question 3>
: Names and Order of Includes
: Use standard order for readability and to avoid hidden dependencies: C
: library, C++ library, other libraries' .h, your project's .h.
: 這樣規定的好處是什麼呢？
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不是很懂為什麼錯誤的訊息會出現在別的header裡??
有人可以用sample code舉例一下，在什麼情況下，A.h的錯誤訊息會出現在B.h裡嗎??
<New Question 1>
Forward Declarations
Cons:
* It can be difficult to determine whether a forward declaration or a full
#include is needed for a given piece of code, particularly when implicit
conversion operations are involved. In extreme cases, replacing an #include
with a forward declaration can silently change the meaning of code.
若牽涉到隱式轉換的話，為什麼會難以決定到底要用#include或forward declaration呢？
而且用forward declaration來代替#include，為什麼會改變code的意思呢??
<New Question 2>
Copy Constructors
Decision:
Few classes need to be copyable. Most should have neither a copy constructor
nor an assignment operator....
這裡提到只有少數的class有copy的需求，
這就是為什麼c#和java會把class設為reference type，
而不是像C\C++一樣把class設為value type的原因嗎???
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