vis

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

(1736B)
      1 -- Copyright 2006-2025 Mitchell. See LICENSE.
      2 -- IDL 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('idl')
      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{
     15 	'abstract', 'attribute', 'case', 'const', 'context', 'custom', 'default', 'enum', 'exception',
     16 	'factory', 'FALSE', 'in', 'inout', 'interface', 'local', 'module', 'native', 'oneway', 'out',
     17 	'private', 'public', 'raises', 'readonly', 'struct', 'support', 'switch', 'TRUE', 'truncatable',
     18 	'typedef', 'union', 'valuetype'
     19 }))
     20 
     21 -- Types.
     22 lex:add_rule('type', token(lexer.TYPE, word_match{
     23 	'any', 'boolean', 'char', 'double', 'fixed', 'float', 'long', 'Object', 'octet', 'sequence',
     24 	'short', 'string', 'unsigned', 'ValueBase', 'void', 'wchar', 'wstring'
     25 }))
     26 
     27 -- Identifiers.
     28 lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
     29 
     30 -- Strings.
     31 local sq_str = lexer.range("'", true)
     32 local dq_str = lexer.range('"', true)
     33 lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
     34 
     35 -- Comments.
     36 local line_comment = lexer.to_eol('//', true)
     37 local block_comment = lexer.range('/*', '*/')
     38 lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
     39 
     40 -- Numbers.
     41 lex:add_rule('number', token(lexer.NUMBER, lexer.number))
     42 
     43 -- Preprocessor.
     44 lex:add_rule('preproc', token(lexer.PREPROCESSOR, lexer.starts_line('#') *
     45 	word_match('define undef ifdef ifndef if elif else endif include warning pragma')))
     46 
     47 -- Operators.
     48 lex:add_rule('operator', token(lexer.OPERATOR, S('!<>=+-/*%&|^~.,:;?()[]{}')))
     49 
     50 lexer.property['scintillua.comment'] = '//'
     51 
     52 return lex