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Update Syntax.md #1247

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Update Syntax.md #1247

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2 changes: 1 addition & 1 deletion docs/Syntax.md
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Expand Up @@ -444,7 +444,7 @@ an infinite stream of bits.
[t1 .. t2 by n] // Enumeration (stride)
[t1 .. <t2 by n] // Enumeration (stride, ex. bound)
[t1 .. t2 down by n] // Enumeration (downward stride)
[t1 .. >t2 down by n] // Enumeration (downward stride, ex. bound)
[t1 .. <t2 down by n] // Enumeration (downward stride, ex. bound)
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I think the downward one is supposed to be using >? As in:

f = [ 3 .. > 1 down by 1]

[3, 2]

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Yes, you're right. I tried this on a docker nightly version of Cryptol from 2 weeks ago that did not yet have this feature and the interpreter complained so I though it was wrong. After updating to the nightly just now I see that this works.

[t1, t2 .. t3] // Enumeration (step by t2 - t1)

[e1 ...] // Infinite sequence starting at e1
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