Challenge
Suppose you have a list of numbers, and a target value. Find the set of all combinations of your numbers which add up to the target value, returning them as list indices.
Input and Output
The input will take a list of numbers (not necessarily unique) and a target summation number. The output will be a set of non-empty lists, each list containing integer values corresponding to the position of the values in the original input list.
Examples
Input: values = [1, 2, 1, 5], target = 8
Output: [ [0,1,3], [1,2,3] ]
Input: values = [4.8, 9.5, 2.7, 11.12, 10], target = 14.8
Output: [ [0,4] ]
Input: values = [7, 8, 9, -10, 20, 27], target = 17
Output: [ [1,2], [0,3,4], [3,5] ]
Input: values = [1, 2, 3], target = 7
Output: [ ]
Scoring
This is code-golf, so the shortest code wins!