What Is a Slot?
Slots are a function in C++ that is used to call any type of member function. However, slots are not very fast compared to callbacks. This is because of the overhead involved when executing a signal or connection in a slot.
The term “slot” is actually a word, and it is defined in the Wiktionary as the smallest opening. It can also be a keyway in machinery, or a slit for a coin in a vending machine.
In modern slot machines, the number of symbols that can appear on the reels is limited. A three-reel machine has about 1,000 possible combinations. These combinations are usually listed on the machine’s face.
In order to see the number of possible combinations, a player needs to know the pay table. There are usually a few different pay tables, and they are categorized by theme. Some of these pay tables include lucky sevens, stylized fruits, bells, and a few other symbols.
A slot also helps to keep repeated delays to a minimum. For example, a slot will tell a user if a signal is waiting for it, but it will not tell the user whether it is a pending or runtime error.
Slots are a good way to keep track of all of the signals and messages that need to be delivered to users. As long as each component uses the correct method, there should be no confusion. Using templates and slots has an explanation on how to use slots.