C++ FAQ / Section 4 / FAQ 4.17

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Revised Jul 4, 2012

[4.17] What updates were made for the 03/06 release?

2 New FAQs:

• [4.17] What updates were made for the 03/06 release?
  (created)
• [29.18] Why is cos(x) != cos(y) even though x == y? (Or sine or tangent or log or just about any other floating point computation)
  (created)

8 Changed FAQs:

• [13.9] What are some guidelines / "rules of thumb" for overloading operators?
  (clarified point #7)
• [13.12] I still don't get it. Why shouldn't my Matrix class's interface look like an array-of-array?
  (fixed call to Matrix::Row ctor thanks to John Pavel)
• [17.14] But MFC seems to encourage the use of catch-by-pointer; should I do the same?
  (changed rand() to rand() >> 8 to (typically) improve the period of lowest 2 bits)
• [23.3] Should I use protected virtuals instead of public virtuals?
  (connected in the (previously named) "Public Overloaded Non-Virtuals Call Protected Non-Overloaded Virtuals" Idiom)
• [34.3] Is the storage for a std::vector<T> guaranteed to be contiguous?
  (added new subject-index entries that point to this FAQ thanks to Peter Koch)
• [35.8] Huh? Can you provide an example of template specialization that doesn't use foo and bar?
  (rewrote the last paragraph for clarity)
• [35.9] But most of the code in my template function is the same; is there some way to get the benefits of template specialization without duplicating all that source code?
  (reworked the code-commentary to improve clarity)
• [38.1] Where can I download a free C++ compiler?
  (added the compilers.net site thanks to Dejan Milicic plus added Microsoft's command-line compiler)