Martin Atkins 6c7802d404 zclsyntax: Parsing of ForExpr
The ForExpr is essentially a list/map comprehension, allowing projecting
one expression into another. From a syntactic standpoint it's the most
complex structure we've dealt with so far, with many separate parts.

The tests introduced here are not exhaustive but illustrate that the
basic mechanism is working.
2017-06-13 08:53:33 -07:00
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2017-06-13 08:53:33 -07:00