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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
-- Lua tokens
-- we need some stuff from here
local parser = require "parser"
local selfify = parser.selfify
local EOF = parser.EOF
local COLLECT = parser.COLLECT
local collect_fallback = parser.collect_fallback
-- "dummies"
local TK_STRING = {}
local tokens = {}
tokens.base = {
[" "] = "whitespace",
["\n"] = "newline",
["\r"] = "newline",
["\v"] = "whitespace",
["\t"] = "whitespace",
["\f"] = "whitespace",
["0"] = "digit",
["1"] = "digit",
["2"] = "digit",
["3"] = "digit",
["4"] = "digit",
["5"] = "digit",
["6"] = "digit",
["7"] = "digit",
["8"] = "digit",
["9"] = "digit",
["a"] = "hexdigit",
["b"] = "hexdigit",
["c"] = "hexdigit",
["d"] = "hexdigit",
["e"] = "hexdigit",
["f"] = "hexdigit",
["A"] = "hexdigit",
["B"] = "hexdigit",
["C"] = "hexdigit",
["D"] = "hexdigit",
["E"] = "hexdigit",
["F"] = "hexdigit",
["g"] = "alpha",
["h"] = "alpha",
["i"] = "alpha",
["j"] = "alpha",
["k"] = "alpha",
["l"] = "alpha",
["m"] = "alpha",
["n"] = "alpha",
["o"] = "alpha",
["p"] = "alpha",
["q"] = "alpha",
["r"] = "alpha",
["s"] = "alpha",
["t"] = "alpha",
["u"] = "alpha",
["v"] = "alpha",
["w"] = "alpha",
["x"] = "alpha",
["y"] = "alpha",
["z"] = "alpha",
["G"] = "alpha",
["H"] = "alpha",
["I"] = "alpha",
["J"] = "alpha",
["K"] = "alpha",
["L"] = "alpha",
["M"] = "alpha",
["N"] = "alpha",
["O"] = "alpha",
["P"] = "alpha",
["Q"] = "alpha",
["R"] = "alpha",
["S"] = "alpha",
["T"] = "alpha",
["U"] = "alpha",
["V"] = "alpha",
["W"] = "alpha",
["X"] = "alpha",
["Y"] = "alpha",
["Z"] = "alpha",
}
local function linecount(state, token, rule)
if token == "\n" or token == "\r" then
state.line = (state.line or 1) + 1
end
end
do local tstring = selfify({})
tokens.string = tstring
tstring.tokens = tokens
do local tsescapes = setmetatable({
["'"] = "insertraw",
['"'] = "insertraw",
['\\'] = "insertraw",
["a"] = "insertmap",
["b"] = "insertmap",
["f"] = "insertmap",
["n"] = "insertmap",
["r"] = "insertmap",
["t"] = "insertmap",
["v"] = "insertmap",
["z"] = "skipwhitespace",
["u"] = "unicode",
["x"] = "hex",
["\n"] = setmetatable({["\r"] = setmetatable({}, {__index=tstring})}, {__index=tstring}),
["\r"] = setmetatable({["\n"] = setmetatable({}, {__index=tstring})}, {__index=tstring}),
[1] = linecount,
}, {__index = tokens.base})
tokens.string.escapes = tsescapes
tsescapes.string = tokens.string
function tsescapes.insertraw(state, token)
collect_fallback(state, token)
return "string"
end
do
local map = { ["a"] = "\a", ["b"] = "\b", ["f"] = "\f", ["n"] = "\n", ["r"] = "\r", ["t"] = "\t", ["v"] = "\v" }
function tsescapes.insertmap(state, token)
collect_fallback(state, map[token])
return "string"
end
end
function tsescapes.digit(state, token)
print(state, token)
local digit = string.find("1234567890", token, 1, true)
local num = state.in_digit
if digit then
num = (num or 0) * 10 + digit % 10
state.c = (state.c or 0) + 1
if state.c < 3 then
state.in_digit = num
return "digitc"
end
end
if num > 255 then
return nil
end
collect_fallback(state, string.char(num))
state.in_digit = nil
state.c = nil
return "string"
end
tsescapes.digitc = setmetatable(selfify({[""] = tsescapes.digit, digitc = "self", string = tstring}), {__index=tstring})
tsescapes.hex = setmetatable(selfify({string = tokens.string, digit = "hexdigit"}), {__index=tokens.base})
function tsescapes.hex.hexdigit(state, token)
local digit = string.find("123456789ABCDEF0123456789abcdef0", token, 1, true)
assert(digit, "this should never be called for non-hex-digits")
local num = state.in_hex
if num then
num = num * 16 + digit % 16
collect_fallback(state, string.char(num))
state.in_hex = nil
return "string"
else
state.in_hex = digit % 16
return "self"
end
end
do local tseskipwhitespace = selfify({
string = tokens.string,
whitespace = "self",
[""] = "string",
[1] = collect_fallback,
[2] = linecount,
})
local tbase = tokens.base
local tbasemap = {whitespace = "whitespace", newline = "whitespace"}
setmetatable(tseskipwhitespace, {__index = function(t, k) return tbasemap[tbase[k]] or tstring[k] end})
tsescapes.skipwhitespace = tseskipwhitespace
end
end
tstring['\\'] = "escapes"
tstring['"'] = "close"
tstring["'"] = "close"
tstring['\n'] = false
tstring['\r'] = false
tstring[""] = "self"
tstring[1] = collect_fallback
function tstring.close(state, token)
if state.in_string == token then
state.in_string = nil
state[#state+1] = table.concat(state[COLLECT])
state[COLLECT] = nil
return "tokens"
else
state[#state+1] = token
return "self"
end
end
end
tokens["'"] = "string_open"
tokens['"'] = "string_open"
tokens[1] = linecount
setmetatable(tokens, {__index=whitespace})
function tokens.string_open(state, token)
if not state.in_string then
state[#state+1] = TK_STRING
state[COLLECT] = {}
state.in_string = token
return "string"
end
assert("this shouldn't happen")
end
return {
tokens = tokens,
TK_STRING = TK_STRING,
}
|
