RangeMap.MakeSourcemodule R : Range_intf.SMaps a position of the cursor (point) to the corresponding token of type 'a in a given text editor with a .lp file open.
module Range : Range_intf.Sfind pt map returns the only (token, range) couple in map such that pt is a point within the mapped interval range. Requires map to be well-defined (see add).
add range token map adds a mapping (key : range, value : token) to map.
Requires all added keys to be non overlapping intervals to be well-defined. /!\ Does not ensure proper functionning if the added keys are overlapping intervals, e.g might change a previously added (key, element) couple or throw an error.