$<_1>

This generator expression belongs to the Bound Operands family. See that section for related generator expressions.

Syntax

$<_1>

Added in version 4.5.

The second bound operand of a binding operation that binds at least two operands, expanding to the second supplied value.

For example, $<LIST:SORT,...,COMPARATOR,body> evaluates body once per comparison with $<_0> and $<_1> bound to the two items being compared.

$<_1> is only valid inside the body of a binding operation that binds at least two operands. Using it anywhere else is an error.