6.2.12. Tuple sections — Glasgow Haskell Compiler 9.2.6 User's Guide

# 6.2.12. Tuple sections

`TupleSections`

  Since: | 6.12

  Allow the use of tuple section syntax

The `TupleSections` extension enables partially applied tuple constructors. For example, the following program

    (, True)

is considered to be an alternative notation for the more unwieldy alternative

    \x -> (x, True)

You can omit any combination of arguments to the tuple, as in the following

    (, "I", , , "Love", , 1337)

which translates to

    \a b c d -> (a, "I", b, c, "Love", d, 1337)

If you have unboxed tuples enabled, tuple sections will also be available for them, like so

    (# , True #)

Because there is no unboxed unit tuple, the following expression

    (# #)

continues to stand for the unboxed singleton tuple data constructor.