Tuples
A tuple is a primary expression ( expr ), where at least expr is a binary operator , comma expression.
A tuple with & id or id as elements must be the the left hand side of the := assignment. Tuples with vardecl as elements must be the left hand side of the = assignment. Tuples with just types must be a function's result-type. Tuple with just values as elements must be a the function's return-value, but can also be used in normal code. In the last case the are expanded, as if you would have written the contents with surrounding brackets. Thus
myfunc(hello, (1, 2, 3), 4)
is transformed to
myfunc(hello, 1, 2, 3, 4)
The rules are:
- First every tuple that is in a tuple is expanded, afterwards itself will be expanded
- As the comma operator is left associative, the most left element will be the first on to be removed from the tuple and added to the left side. While the operator on the left is automatically removed.