C++ Notes C14 Namespaces
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在閱讀 The C++ Programming Language 4th Edition - Bjarne Stroustrup 過程中的紀錄。
14.1 - Composition Problems
14.2 - Namespaces
14.2.1 - Explicit Qualification
Classes are namespaces
14.2.2 - using-Declarations
using std::string; // "string" means "std::string"
14.2.3 - using-Directives
using namespace std;
Don’t use using-directives in global scope.
14.2.4 - Argument-Dependent Lookup
14.2.5 - Namespaces Are Open
14.3 - Modularization and Interfaces
14.3.1 - Namespaces as Modules
14.3.2 - Implementations
14.3.3 - Interfaces and Implementations
14.4 - Composition Using Namespaces
14.4.2 - Namespace Aliases
14.4.3 - Namespace Composition
14.4.4 - Composition and Selection
14.4.5 - Namespaces and Overloading
避免將 using-directives 放在 header files，因為容易造成 name clashes.
using namespace A;