"Point" is a special buffer position used by many editing commands. Like other positions, point designates a place between two characters (or before the first character, or after the last character), rather than a particular character. The value of point is a number no less than 1, and no greater than the buffer size plus 1.
Each buffer has its own value of point, which is independent of the value of point in other buffers. Each window also has a value of point, which is independent of the value of point in other windows on the same buffer. This is why point can have different values in various windows that display the same buffer. When a buffer appears in only one window, the buffer's point and the window's point normally have the same value, so the distinction is rarely important.
(Info-goto-node "(elisp)Point").
val get : unit -> Position.t(describe-function 'point).
val min : unit -> Position.t(describe-function 'point-min).
val max : unit -> Position.t(describe-function 'point-max).
val goto_char : Position.t -> unit(describe-function 'goto-char).
val count_lines : start:Position.t -> end_:Position.t -> int(describe-function 'count-lines).
forward_char_exn n moves point n characters forward (backward if n is negative). forward_char_exn raises on reaching end or beginning of buffer. (describe-function
'forward-char).
delete_backward_char_exn n = delete_forward_char_exn (- n).
forward_line n moves n lines forward (backward if n is negative). Precisely, if point is on line i, move to the start of line i + n ("start of line" in the logical order). If there isn’t room, go as far as possible (no error). (describe-function 'forward-line). (Info-goto-node "(elisp)Text Lines")
forward_line_exn n is like forward_line n, but it raises if it could not move the full n lines.
(describe-function 'forward-sexp) (Info-goto-node "(elisp)List Motion")
(describe-function 'backward-sexp) (Info-goto-node "(elisp)List Motion")
(describe-function 'forward-word) (Info-goto-node "(elisp)Word Motion")
(describe-function 'backward-word) (Info-goto-node "(elisp)Word Motion")
val following_char : unit -> Char_code.t(describe-function 'following-char)
line_number returns the line number of the character after point, where the first line of the buffer is line 1. (describe-function 'line-number-at-pos). (Info-goto-node "(elisp)Text Lines")
column_number returns the colum of point, where the beginning of line is column 0. (describe-function 'current-column). (Info-goto-node "(elisp)Columns")
goto_column c moves point to column c on the current line. (describe-function 'move-to-column). (Info-goto-node "(elisp)Columns")
val insert_text : Text.t -> unit(describe-function 'insert-file-contents-literally)
(Info-goto-node "(elisp)Creating Markers")
val marker_at : unit -> Marker.t(describe-function 'point-marker).
val marker_at_min : unit -> Marker.t(describe-function 'point-min-marker).
val marker_at_max : unit -> Marker.t(describe-function 'point-max-marker).
There are eight search functions, varying by whether they:
Searching backward sets point to the start of the match. Searching forward sets point to the end of the match. With ~bound, when searching backward, the match must start before bound; when searching forward, the match must end before bound. With ~update_last_match:true, searching updates Regexp.Last_match.
(Info-goto-node "(elisp)String Search") (describe-function 'search-backward) (describe-function 'search-forward)
(Info-goto-node "(elisp)Regexp Search") (describe-function 'search-backward-regexp) (describe-function 'search-forward-regexp)
type 'a with_search_options =
?bound:Position.t ->
?update_last_match:bool ->
'aval search_backward : (string -> bool) with_search_optionsval search_backward_exn : (string -> unit) with_search_optionsval search_forward : (string -> bool) with_search_optionsval search_forward_exn : (string -> unit) with_search_optionsval search_backward_regexp : (Regexp.t -> bool) with_search_optionsval search_backward_regexp_exn : (Regexp.t -> unit) with_search_optionsval search_forward_regexp : (Regexp.t -> bool) with_search_optionsval search_forward_regexp_exn : (Regexp.t -> unit) with_search_optionsval looking_at : ?update_last_match:bool -> Regexp.t -> boollooking_at regexp returns true if the text after point matches regexp. (describe-function 'looking-at) (describe-function 'looking-at-p) (Info-goto-node "(elisp)Regexp Search")