blob: 751df7e6dd2cd42d8291ce85142b77ac5185d288 (
plain)
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
|
;; Copyright (c) Eduardo Julian. All rights reserved.
;; This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
;; If a copy of the MPL was not distributed with this file,
;; You can obtain one at http://mozilla.org/MPL/2.0/.
(ns lux.reader
(:require [clojure.string :as string]
clojure.core.match
clojure.core.match.array
[lux.base :as & :refer [deftags |do return* return fail fail* |let |case]]))
;; [Tags]
(deftags
["No"
"Done"
"Yes"])
;; [Utils]
(defn ^:private with-line [body]
(fn [state]
(|case (&/get$ &/$source state)
(&/$Nil)
(fail* "[Reader Error] EOF")
(&/$Cons [[file-name line-num column-num] line]
more)
(|case (body file-name line-num column-num line)
($No msg)
(fail* msg)
($Done output)
(return* (&/set$ &/$source more state)
output)
($Yes output line*)
(return* (&/set$ &/$source (&/Cons$ line* more) state)
output))
)))
(defn ^:private with-lines [body]
(fn [state]
(|case (body (&/get$ &/$source state))
(&/$Right reader* match)
(return* (&/set$ &/$source reader* state)
match)
(&/$Left msg)
(fail* msg)
)))
(defn ^:private re-find! [^java.util.regex.Pattern regex column ^String line]
(let [matcher (doto (.matcher regex line)
(.region column (.length line))
(.useAnchoringBounds true))]
(when (.find matcher)
(.group matcher 0))))
(defn ^:private re-find3! [^java.util.regex.Pattern regex column ^String line]
(let [matcher (doto (.matcher regex line)
(.region column (.length line))
(.useAnchoringBounds true))]
(when (.find matcher)
(list (.group matcher 0)
(.group matcher 1)
(.group matcher 2)))))
;; [Exports]
(defn read-regex [regex]
(with-line
(fn [file-name line-num column-num ^String line]
(if-let [^String match (re-find! regex column-num line)]
(let [match-length (.length match)
column-num* (+ column-num match-length)]
(if (= column-num* (.length line))
(&/V $Done (&/T (&/T file-name line-num column-num) match))
(&/V $Yes (&/T (&/T (&/T file-name line-num column-num) match)
(&/T (&/T file-name line-num column-num*) line)))))
(&/V $No (str "[Reader Error] Pattern failed: " regex))))))
(defn read-regex2 [regex]
(with-line
(fn [file-name line-num column-num ^String line]
(if-let [[^String match tok1 tok2] (re-find3! regex column-num line)]
(let [match-length (.length match)
column-num* (+ column-num match-length)]
(if (= column-num* (.length line))
(&/V $Done (&/T (&/T file-name line-num column-num) (&/T tok1 tok2)))
(&/V $Yes (&/T (&/T (&/T file-name line-num column-num) (&/T tok1 tok2))
(&/T (&/T file-name line-num column-num*) line)))))
(&/V $No (str "[Reader Error] Pattern failed: " regex))))))
(defn read-regex+ [regex]
(with-lines
(fn [reader]
(loop [prefix ""
reader* reader]
(|case reader*
(&/$Nil)
(&/V &/$Left "[Reader Error] EOF")
(&/$Cons [[file-name line-num column-num] ^String line]
reader**)
(if-let [^String match (re-find! regex column-num line)]
(let [match-length (.length match)
column-num* (+ column-num match-length)
prefix* (if (= 0 column-num)
(str prefix "\n" match)
(str prefix match))]
(if (= column-num* (.length line))
(recur prefix* reader**)
(&/V &/$Right (&/T (&/Cons$ (&/T (&/T file-name line-num column-num*) line)
reader**)
(&/T (&/T file-name line-num column-num) prefix*)))))
(&/V &/$Left (str "[Reader Error] Pattern failed: " regex))))))))
(defn read-text [^String text]
(with-line
(fn [file-name line-num column-num ^String line]
(if (.startsWith line text column-num)
(let [match-length (.length text)
column-num* (+ column-num match-length)]
(if (= column-num* (.length line))
(&/V $Done (&/T (&/T file-name line-num column-num) text))
(&/V $Yes (&/T (&/T (&/T file-name line-num column-num) text)
(&/T (&/T file-name line-num column-num*) line)))))
(&/V $No (str "[Reader Error] Text failed: " text))))))
(defn from [^String name ^String source-code]
(->> source-code
(string/split-lines)
(&/->list)
(&/enumerate)
(&/|filter (fn [line+line-num]
(|let [[line-num line] line+line-num]
(not= "" line))))
(&/|map (fn [line+line-num]
(|let [[line-num line] line+line-num]
(&/T (&/T name (inc line-num) 0)
line))))))
|
