Cannot enumerate an int in a `for` expression

[Chuck]

for statements support both sequences and integers:

for cust in customers
    print cust
for i in 10
    print i, i*2

Then there is a for expression, but using it on integers causes an error:

custs = for cust in customers where cust.hasOutstandingBalance

# errors
nums = for i in 10 get i*2
objs = for i in j get items[i+1]

for expressions on integers are occasionally needed and would make the language more symmetrical.

[hopscc]

Patch supporting single int and slice like int expression in for-expr same as in for-stmt. Test files for this and enumerable for-expr

[Chuck]

Fixed in changeset:1829

Thanks.