Info: (elisp) SMIE

elisp: SMIE

 
 22.7.1 Simple Minded Indentation Engine
 ---------------------------------------
 
 SMIE is a package that provides a generic navigation and indentation
 engine.  Based on a very simple parser using an operator precedence
 grammar, it lets major modes extend the sexp-based navigation of Lisp to
 non-Lisp languages as well as provide a simple to use but reliable
 auto-indentation.
 
    Operator precedence grammar is a very primitive technology for
 parsing compared to some of the more common techniques used in
 compilers.  It has the following characteristics: its parsing power is
 very limited, and it is largely unable to detect syntax errors, but it
 has the advantage of being algorithmically efficient and able to parse
 forward just as well as backward.  In practice that means that SMIE can
 use it for indentation based on backward parsing, that it can provide
 both ‘forward-sexp’ and ‘backward-sexp’ functionality, and that it will
 naturally work on syntactically incorrect code without any extra effort.
 The downside is that it also means that most programming languages
 cannot be parsed correctly using SMIE, at least not without resorting to
 some special tricks (SMIE Tricks).

 
· SMIE setup                  SMIE setup and features.
· Operator Precedence Grammars  A very simple parsing technique.
· SMIE Grammar                Defining the grammar of a language.
· SMIE Lexer                  Defining tokens.
· SMIE Tricks                 Working around the parser’s limitations.
· SMIE Indentation            Specifying indentation rules.
· SMIE Indentation Helpers    Helper functions for indentation rules.
· SMIE Indentation Example    Sample indentation rules.
· SMIE Customization          Customizing indentation.

Info Catalog

elisp: Auto-Indentation

elisp: SMIE

Menu