Pash-Project/Pash — pull request #227 by mrward (2014-06-14 14:30:09+00:00)
Title: Implement subexpression operator $(...)

The following subexpressions now work:

$(2,4,6)
$(1 + 2)
$($i = 10; ++$j)
$($i = 4) -eq $null # True

There is currently no support for subexpressions inside strings.