Weaves | 773
Example Expansion
13 upto'' 5812 13456781234567812345812
DOWNTO
Operator usage Short form
<pattern> extend <count> ext, ->
Operator usage: <pattern> downto <pattern> Short form: >, -
The “-” may be used as an downto operator only when the last element of the left operand is strictly
greater than the first element of the right operand.
The left and right operands are both patterns of any length.
The expansion is the left operand concatenated with the descending sequence between the last element
of the left operand and the first element of the right operand, concatenated with the rest of the right
operand.
Downto wraps around on the domain. For example, 2 downto 7 expands to 2187.
The downto operator may be followed immediately (with no intervening characters) by any number of tick
marks ( ' ). A tick mark indicates to cycle through the domain before running down to the right operand.
The number of tick marks sets the number of cycles.
Example Expansion
8-1 87654321
1-8-1 123456787654321
5-''1 543218765432187654321
567-321 567654321
2>1 21
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