June 2007
Intermediate to advanced
624 pages
15h 14m
English
Content preview from Extended STL, Volume 1: Collections and Iterators
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Chapter 8. Constraints
I see, and I do not understand. I hear, and I forget. I do, and I remember. | ||
| --Proverb | ||
The average man doesn’t want to be free. He wants to be safe. | ||
| --Henry Louis Mencken | ||
A constraint is a condition that one software element places on another, at compile time, in order for them to successfully interoperate. Constraints may be thought of as compile-time contract enforcements. I bang on at great length about constraints in Section 1.2 of Imperfect C++. My editor would be quite distraught if I were to repeat that material here, so I will just describe the two main types of constraints supported by the language and give a couple of examples of each.
Type System Leverage
The classic constraint given by Bjarne Stroustrup (in a ...
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