prolog:complete

Compute auto completions for the input line BeforeCursor+AfterCursor. Implemented completions

Files<br>
- Text starting '<prefix> (single quotes) is completed as a file. If there is a single matching file a terminating `'` is added.
- If the start of the line is [<prefix> and text can be a non-quoted atom, look for Prolog files with this name. Directories can be inserted as / (unquoted), as long as each segment is a valid atom. If a single .pl file is found it is closed with ], without the extension.
- Text starting library(<prefix> is completed as a library file using the same rules as [<prefix>, but looking in all library directories instead of the current directory.
Atoms
<prefix> is used to complete atoms that can be written without quotes (excluding symbol atoms such as -->) and are permanent, i.e., have references from clauses records, flags, foreign code, etc.
Variables
<Prefix> is completed as an atom if it is a valid variable name. It is completed with other atoms from the query being edited using the same search as Emacs dabbrev (Dynamic Abbreviation). $<Prefix> expands to saved toplevel variables.

Arguments:

`Delete`	- is an atom or string representing the text that is replaced by the completion
`Completions`	- is a list of elements of this shape: Atom Used for a plain completion without comment `Atom` - `Comment` Used for a completion with comment. This will be used for predicates.