fqa.anubis
13.4 KB
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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
/*
* Created by PyramIDE.
* User: フランスのトトロ aka (David RENÉ)
* Date: 12/07/2017
* Time: 22:28
* © David RENÉ
*/
This is an example of use of 'lexer_maker'.
read tools/basis.anubis
We want to test email addresses. Below is a regular expression for that
purpose. Actually, this expression is too naïve. A real one would be more complicated.
read tools/streams.anubis
type LM_TokenOrError_FQA:
end_of_file,
token(List(Word8)),
error.
type LM_LexerState_FQA: ...
type LM_Match_FQA:
match(List(Word8) characters,
(LM_LexerState_FQA,List(Word8)) -> (LM_LexerState_FQA,LM_TokenOrError_FQA) action,
Bool aeol,
Bool abol).
type LM_LexerState_FQA:
lexer_state(Stream input,
List(Word8) unput, // in natural order
List(Word8) more, // in reverse order
LM_LexerState_FQA -> (LM_LexerState_FQA,LM_TokenOrError_FQA) lexer,
Bool at_end_of_line,
Bool at_beginning_of_line,
Maybe(LM_Match_FQA) match).
define LM_LexerState_FQA
lm_initial_state
(
Stream input,
LM_LexerState_FQA -> (LM_LexerState_FQA,LM_TokenOrError_FQA) lexer
) =
lexer_state(input,[],[],lexer,false,true,failure).
define (LM_LexerState_FQA,Word8)
lm_next_char
(
LM_LexerState_FQA ls
) =
if ls is lexer_state(input,unput,more,lex,aeol,abol,match) then
if unput is
{
[ ] then
if read_byte(input) is
{
failure then
(lexer_state(input,
[],
more,
lex,
true,
aeol,
match),
-1),
success(c) then
(lexer_state(input,
[],
[c . more],
lex,
c = '\n',
aeol,
match),
c),
},
[h . t] then
(lexer_state(input,
t,
[h . more],
lex,
h = '\n',
aeol,
match),
h)
}.
define LM_LexerState_FQA
lm_remember_match
(
(LM_LexerState_FQA,List(Word8)) -> (LM_LexerState_FQA,LM_TokenOrError_FQA) action,
LM_LexerState_FQA ls
) =
if ls is lexer_state(input,unput,more,lex,aeol,abol,m) then
with chars = if m is
{
failure then [],
success(match) then
if match is match(chars,_,_,_) then chars
},
lexer_state(input,
unput,
[],
lex,
aeol,
abol,
success(match(append(more,chars),action,aeol,abol))).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
lm_find_match
(
LM_LexerState_FQA ls
) =
if ls is lexer_state(input,unput,more,lex,_,_,mb_m) then
if mb_m is
{
failure then (ls,error),
success(m) then
if m is match(chars,action,aeol,abol) then
action(lexer_state(input,
append(more,unput),
[],
lex,
aeol,
abol,
failure),
reverse(chars))
}.
define LM_LexerState_FQA
change_lexer
(
LM_LexerState_FQA ls,
LM_LexerState_FQA -> (LM_LexerState_FQA,LM_TokenOrError_FQA) lex
) =
if ls is lexer_state(input,unput,more,_,aeol,abol,mb_m) then
lexer_state(input,unput,more,lex,aeol,abol,mb_m).
define LM_LexerState_FQA
clear_abol
(
LM_LexerState_FQA ls
) =
if ls is lexer_state(input,unput,more,lex,aeol,_,mb_m) then
lexer_state(input,unput,more,lex,aeol,false,mb_m).
Declarations of all lexer states.
public define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_1(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_2(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_3(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_4(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_5(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_6(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_7(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_8(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_9(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_10(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_11(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_12(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_state_13(LM_LexerState_FQA ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_action_0
(LM_LexerState_FQA ls, List(Word8) text).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_action_1
(LM_LexerState_FQA ls, List(Word8) text).
define (LM_LexerState_FQA,LM_TokenOrError_FQA) email_tester_action_2
(LM_LexerState_FQA ls, List(Word8) text).
Lexer states.
public define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester
(
LM_LexerState_FQA ls,
) =
if at_beginning_of_line(ls)
then email_tester_state_3(clear_abol(ls)) else
if lm_next_char(ls) is (_ls,c) then
if c = -1 then email_tester_state_1(_ls) else
if c = 45 then email_tester_state_4(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_4(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_4(_ls) else
if c = 95 then email_tester_state_4(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_4(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_1
(
LM_LexerState_FQA ls,
) =
with _ls = lm_remember_match(email_tester_action_2,ls),
if lm_next_char(_ls) is (__ls,c) then
lm_find_match(__ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_2
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_3
(
LM_LexerState_FQA ls,
) =
with _ls = lm_remember_match(email_tester_action_1,ls),
if lm_next_char(_ls) is (__ls,c) then
lm_find_match(__ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_4
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_4(_ls) else
if c = 46 then email_tester_state_5(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_4(_ls) else
if c = 64 then email_tester_state_7(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_4(_ls) else
if c = 95 then email_tester_state_4(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_4(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_5
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_6(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_6(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_6(_ls) else
if c = 95 then email_tester_state_6(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_6(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_6
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_6(_ls) else
if c = 46 then email_tester_state_5(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_6(_ls) else
if c = 64 then email_tester_state_7(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_6(_ls) else
if c = 95 then email_tester_state_6(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_6(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_7
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_8(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_8(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_8(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_8(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_8
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_8(_ls) else
if c = 46 then email_tester_state_9(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_8(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_8(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_8(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_9
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_10(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_11(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_11(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_11(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_10
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_10(_ls) else
if c = 46 then email_tester_state_9(_ls) else
if (48 +=< c & c +=< 57) then email_tester_state_10(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_10(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_10(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_11
(
LM_LexerState_FQA ls,
) =
with _ls = lm_remember_match(email_tester_action_0,ls),
if lm_next_char(_ls) is (__ls,c) then
if c = 45 then email_tester_state_10(__ls) else
if c = 46 then email_tester_state_12(__ls) else
if (48 +=< c & c +=< 57) then email_tester_state_11(__ls) else
if (65 +=< c & c +=< 90) then email_tester_state_11(__ls) else
if (97 +=< c & c +=< 122) then email_tester_state_11(__ls) else
lm_find_match(__ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_12
(
LM_LexerState_FQA ls,
) =
if lm_next_char(ls) is (_ls,c) then
if c = 45 then email_tester_state_10(ls) else
if (48 +=< c & c +=< 57) then email_tester_state_13(_ls) else
if (65 +=< c & c +=< 90) then email_tester_state_13(_ls) else
if (97 +=< c & c +=< 122) then email_tester_state_13(_ls) else
lm_find_match(_ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_state_13
(
LM_LexerState_FQA ls,
) =
with _ls = lm_remember_match(email_tester_action_0,ls),
if lm_next_char(_ls) is (__ls,c) then
if c = 45 then email_tester_state_10(__ls) else
if c = 46 then email_tester_state_12(__ls) else
if (48 +=< c & c +=< 57) then email_tester_state_13(__ls) else
if (65 +=< c & c +=< 90) then email_tester_state_13(__ls) else
if (97 +=< c & c +=< 122) then email_tester_state_13(__ls) else
lm_find_match(__ls).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_action_0
(
LM_LexerState_FQA ls,
List(Word8) text
) =
(ls,token(text)).
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_action_1
(
LM_LexerState_FQA ls,
List(Word8) text
) =
/* default action */ email_tester(ls) .
define (LM_LexerState_FQA,LM_TokenOrError_FQA)
email_tester_action_2
(
LM_LexerState_FQA ls,
List(Word8) text
) =
/* default action */ (ls,end_of_file) .
Since '@' is a normal character, a string needs to contain exactly one '@' for being
accepted. What is accepted before and after this '@' is described by:
[a-zA-Z]+(\.[a-zA-Z]+)*
The first part: [a-zA-Z]+ means ``at least one letter''. The last part: (\.[a-zA-Z]+)*
means: ``a dot followed by at least one letter, and this may be repeated any number of
times (including zero)''.
This part of the source file is the 'postambule' (just Anubis text, which is copied 'as
is' to the lexer_maker output file).
The above stuff produces a function named 'email_tester' into the lexer_maker output
file. This function is used below:
public define Bool
test_fqa
(
String account
) =
with ls = lexer_state(make_stream(account),[],[],email_tester,true,false,failure),
if email_tester(ls) is (_,result) then if result is
{
end_of_file then false,
token(t) then
(
with _result = implode(t),
if length(_result) = length(account) then
//logDebug(debug_log,"["+account +"] is FQA valid");
true
else
println("["+account+"] is valid FQA but different than ["+_result+"]");
false
),
error then
//logWarning(debug_log,"["+account+"] isn't valid FQA ");
false
}.