54 lines
1.6 KiB
Lua
54 lines
1.6 KiB
Lua
|
-- Copyright 2006-2019 Mitchell mitchell.att.foicica.com. See License.txt.
|
||
|
|
-- VisualBasic 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('vbscript')
|
||
|
|
|
||
|
|
-- Whitespace.
|
||
|
|
lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
|
||
|
|
|
||
|
|
-- Keywords.
|
||
|
|
lex:add_rule('keyword', token(lexer.KEYWORD, word_match([[
|
||
|
|
-- Control.
|
||
|
|
If Then Else ElseIf While Wend For To Each In Step Case Select Return Continue
|
||
|
|
Do Until Loop Next With Exit
|
||
|
|
-- Operators.
|
||
|
|
Mod And Not Or Xor Is
|
||
|
|
-- Storage types.
|
||
|
|
Call Class Const Dim ReDim Preserve Function Sub Property End Set Let Get New
|
||
|
|
Randomize Option Explicit On Error Execute
|
||
|
|
-- Storage modifiers.
|
||
|
|
Private Public Default
|
||
|
|
-- Constants.
|
||
|
|
Empty False Nothing Null True
|
||
|
|
]], true)))
|
||
|
|
|
||
|
|
-- Types.
|
||
|
|
lex:add_rule('type', token(lexer.TYPE, word_match([[
|
||
|
|
Boolean Byte Char Date Decimal Double Long Object Short Single String
|
||
|
|
]], true)))
|
||
|
|
|
||
|
|
-- Comments.
|
||
|
|
lex:add_rule('comment', token(lexer.COMMENT,
|
||
|
|
(P("'") + word_match([[rem]], true)) *
|
||
|
|
lexer.nonnewline^0))
|
||
|
|
|
||
|
|
-- Identifiers.
|
||
|
|
lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
|
||
|
|
|
||
|
|
-- Strings.
|
||
|
|
lex:add_rule('string', token(lexer.STRING,
|
||
|
|
lexer.delimited_range('"', true, true)))
|
||
|
|
|
||
|
|
-- Numbers.
|
||
|
|
lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) *
|
||
|
|
S('LlUuFf')^-2))
|
||
|
|
|
||
|
|
-- Operators.
|
||
|
|
lex:add_rule('operator', token(lexer.OPERATOR, S('=><+-*^&:.,_()')))
|
||
|
|
|
||
|
|
return lex
|