Member Initializer Lists

Snippet

Member Initializer Lists

Member initializer lists are used in constructors to initialize class members before the constructor body executes, which is more efficient than assignment.

snippet.cpp
cpp
class Database {
    std::string connectionString;
    int timeout;
public:
    Database(std::string conn, int t)
        : connectionString(conn), timeout(t) {}
};

Breakdown

: connectionString(conn), timeout(t)

The colon starts the initializer list, setting values directly into the members.

{}

The empty constructor body since initialization is already handled.

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Member Initializer Lists

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