Elisp: Find Syntax of a Char

By Xah Lee. Date: . Last updated: .

Find Char Syntax of Current Buffer by Command

use describe-char

Find Char Syntax by Emacs Lisp Code

The function char-syntax returns a character's syntax class.

(char-syntax (string-to-char "-")) ; returns 95
;; 95 (#o137, #x5f, ?_)
;; _ means it's in syntax class of symbol

Show Current Syntax Table

Syntax Table is Local to Buffer

Remember, each buffer has its own syntax table, typically set by a major mode.

Emacs has a standard-syntax-table, which is the syntax table used by fundamental-mode.

So, to find a character's syntax class in standard syntax table, first Alt+x fundamental-mode to switch to fundamental mode.

Elisp, character and syntax table