52 lines
1.7 KiB
Lua
52 lines
1.7 KiB
Lua
|
-- Copyright 2006-2019 Mitchell mitchell.att.foicica.com. See License.txt.
|
||
|
|
-- IDL LPeg lexer.
|
||
|
|
|
||
|
|
local lexer = require('lexer')
|
||
|
|
local token, word_match = lexer.token, lexer.word_match
|
||
|
|
local P, R, S = lpeg.P, lpeg.R, lpeg.S
|
||
|
|
|
||
|
|
local lex = lexer.new('idl')
|
||
|
|
|
||
|
|
-- Whitespace.
|
||
|
|
lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
|
||
|
|
|
||
|
|
-- Keywords.
|
||
|
|
lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
|
||
|
|
abstract attribute case const context custom default enum exception factory
|
||
|
|
FALSE in inout interface local module native oneway out private public raises
|
||
|
|
readonly struct support switch TRUE truncatable typedef union valuetype
|
||
|
|
]]))
|
||
|
|
|
||
|
|
-- Types.
|
||
|
|
lex:add_rule('type', token(lexer.TYPE, word_match[[
|
||
|
|
any boolean char double fixed float long Object octet sequence short string
|
||
|
|
unsigned ValueBase void wchar wstring
|
||
|
|
]]))
|
||
|
|
|
||
|
|
-- Identifiers.
|
||
|
|
lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
|
||
|
|
|
||
|
|
-- Strings.
|
||
|
|
lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'", true) +
|
||
|
|
lexer.delimited_range('"', true)))
|
||
|
|
|
||
|
|
-- Comments.
|
||
|
|
local line_comment = '//' * lexer.nonnewline_esc^0
|
||
|
|
local block_comment = '/*' * (lexer.any - '*/')^0 * P('*/')^-1
|
||
|
|
lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
|
||
|
|
|
||
|
|
-- Numbers.
|
||
|
|
lex:add_rule('number', token(lexer.NUMBER, lexer.float + lexer.integer))
|
||
|
|
|
||
|
|
-- Preprocessor.
|
||
|
|
local preproc_word = word_match[[
|
||
|
|
define undef ifdef ifndef if elif else endif include warning pragma
|
||
|
|
]]
|
||
|
|
lex:add_rule('preproc', token(lexer.PREPROCESSOR, lexer.starts_line('#') *
|
||
|
|
preproc_word))
|
||
|
|
|
||
|
|
-- Operators.
|
||
|
|
lex:add_rule('operator', token(lexer.OPERATOR, S('!<>=+-/*%&|^~.,:;?()[]{}')))
|
||
|
|
|
||
|
|
return lex
|