How to use `&` in a match expression?

Question

In the Symbol and Operator Reference, a symbol is &used to:

Links: Matching Expressions

• Computes the address of a mutable value to use when interacting with other languages.

• Used in AND patterns.

I looked at the Match Expression page, but I did not see any AND patterns. How to use templates &?

Answer 1

The syntax and pattern is as follows:

(a, b) & (_, "test")

This is documented here .