vis

a vi-like editor based on Plan 9's structural regular expressions
ini.lua

(1128B)
      1 -- Copyright 2006-2025 Mitchell. See LICENSE.
      2 -- Ini LPeg lexer.
      3 
      4 local lexer = require('lexer')
      5 local token, word_match = lexer.token, lexer.word_match
      6 local P, S = lpeg.P, lpeg.S
      7 
      8 local lex = lexer.new('ini')
      9 
     10 -- Whitespace.
     11 lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
     12 
     13 -- Keywords.
     14 lex:add_rule('keyword', token(lexer.KEYWORD, word_match('true false on off yes no')))
     15 
     16 -- Identifiers.
     17 lex:add_rule('identifier', token(lexer.IDENTIFIER, (lexer.alpha + '_') * (lexer.alnum + S('_.'))^0))
     18 
     19 -- Strings.
     20 local sq_str = lexer.range("'")
     21 local dq_str = lexer.range('"')
     22 lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
     23 
     24 -- Labels.
     25 lex:add_rule('label', token(lexer.LABEL, lexer.range('[', ']', true)))
     26 
     27 -- Comments.
     28 lex:add_rule('comment', token(lexer.COMMENT, lexer.to_eol(lexer.starts_line(S(';#')))))
     29 
     30 -- Numbers.
     31 local integer = S('+-')^-1 * (lexer.hex_num + lexer.oct_num_('_') + lexer.dec_num_('_'))
     32 lex:add_rule('number', token(lexer.NUMBER, lexer.float + integer))
     33 
     34 -- Operators.
     35 lex:add_rule('operator', token(lexer.OPERATOR, '='))
     36 
     37 lexer.property['scintillua.comment'] = '#'
     38 
     39 return lex