17.1. The tuple Type
A tuple is a template that is similar to a pair (§ 11.2.3, p. 426). Each pair type has different types for its members, but every pair always has exactly two members. A tuple also has members whose types vary from one tuple type to another, but a tuple can have any number of members. Each distinct tuple type has a fixed number of members, but the number of members in one tuple type can differ from the number of members in another.
A tuple is most useful when we want to combine some data into a single object but do not want to bother to define a data structure to represent those data. Table 17.1 lists the operations that ...
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