Notes of Effective Modern C++

Because in C++11 const_iterator is finally usable.

Because it is easy to miss the 6 conditions for overriding to occur.

Delete functions replace the private-undefined-function trick and there are some nice tricks that only delete functions can do.

Scoped enums are better because they are scoped, strong-typed, and may be forward-declared out-of-the-box.

Because alias declarations may be templatized but typedefs can’t.

Because 0 and NULL doesn’t work well with function overloads and template type deduction.

Uniform initialization is usually preferred, but it may surprise you when combined with std::initializer_list and constructor overload resolution (and template makes the situation even more frustrating).

General rule: “Invisible” proxy classes don’t play well with auto. Use explicitly typed initializer idiom to work around it.

auto saves typing, prevents incorrect or less-performant (eliminate unnecessary temporary objects) usages, and sometimes is a must.

In additional to IDE support, you may use compiler diagonostics (e.g., use declared but undefined templates).

decltype rules are sometimes preferred in type deduction. Primary use case of decltype: When declaring function templates, make function’s return type depends on its parameter type.

Same as template type deduction, except for std::initializer_list.

Three general cases: 1. Reference or pointer but not universal reference; 2. Universal reference; 3. Neither reference nor pointer. Edge cases: Array arguments and function arguments.

C++11’s most pervasive feature is probably move semantics, and the foundation of it is distinguishing expression that are rvalues from those that are lvalues.