1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
-- Copyright 2006-2017 Mitchell mitchell.att.foicica.com. See LICENSE.
-- Nemerle LPeg lexer.
local l = require('lexer')
local token, word_match = l.token, l.word_match
local P, R, S = lpeg.P, lpeg.R, lpeg.S
local M = {_NAME = 'nemerle'}
-- Whitespace.
local ws = token(l.WHITESPACE, l.space^1)
-- Comments.
local line_comment = '//' * l.nonnewline_esc^0
local block_comment = '/*' * (l.any - '*/')^0 * P('*/')^-1
local comment = token(l.COMMENT, line_comment + block_comment)
-- Strings.
local sq_str = P('L')^-1 * l.delimited_range("'", true)
local dq_str = P('L')^-1 * l.delimited_range('"', true)
local string = token(l.STRING, sq_str + dq_str)
-- Numbers.
local number = token(l.NUMBER, l.float + l.integer)
-- Preprocessor.
local preproc_word = word_match{
'define', 'elif', 'else', 'endif', 'endregion', 'error', 'if', 'ifdef',
'ifndef', 'line', 'pragma', 'region', 'undef', 'using', 'warning'
}
local preproc = token(l.PREPROCESSOR,
l.starts_line('#') * S('\t ')^0 * preproc_word)
-- Keywords.
local keyword = token(l.KEYWORD, word_match{
'_', 'abstract', 'and', 'array', 'as', 'base', 'catch', 'class', 'def', 'do',
'else', 'extends', 'extern', 'finally', 'foreach', 'for', 'fun', 'if',
'implements', 'in', 'interface', 'internal', 'lock', 'macro', 'match',
'module', 'mutable', 'namespace', 'new', 'out', 'override', 'params',
'private', 'protected', 'public', 'ref', 'repeat', 'sealed', 'static',
'struct', 'syntax', 'this', 'throw', 'try', 'type', 'typeof', 'unless',
'until', 'using', 'variant', 'virtual', 'when', 'where', 'while',
-- Values.
'null', 'true', 'false'
})
-- Types.
local type = token(l.TYPE, word_match{
'bool', 'byte', 'char', 'decimal', 'double', 'float', 'int', 'list', 'long',
'object', 'sbyte', 'short', 'string', 'uint', 'ulong', 'ushort', 'void'
})
-- Identifiers.
local identifier = token(l.IDENTIFIER, l.word)
-- Operators.
local operator = token(l.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}'))
M._rules = {
{'whitespace', ws},
{'keyword', keyword},
{'type', type},
{'identifier', identifier},
{'string', string},
{'comment', comment},
{'number', number},
{'preproc', preproc},
{'operator', operator},
}
M._foldsymbols = {
_patterns = {'%l+', '[{}]', '/%*', '%*/', '//'},
[l.PREPROCESSOR] = {
region = 1, endregion = -1,
['if'] = 1, ifdef = 1, ifndef = 1, endif = -1
},
[l.OPERATOR] = {['{'] = 1, ['}'] = -1},
[l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
}
return M
|
