blob: 4a5a156067772a629bbafdcc5a000080548c0e1e (
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
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
|
(.module:
[lux #*
["." meta]
[abstract
["." monad (#+ do)]]
[control
["." try (#+ Try)]
["." exception (#+ exception:)]
["<>" parser ("#\." functor)
["<.>" code (#+ Parser)]]]
[data
["." bit ("#\." codec)]
["." text]
[collection
["." list ("#\." monad fold)]
["." dictionary (#+ Dictionary)
["." plist]]]]
[math
[number
["." nat ("#\." decimal)]
["." int ("#\." decimal)]
["." rev ("#\." decimal)]
["." frac ("#\." decimal)]]]]
[//
[syntax (#+ syntax:)]
["." code]])
(syntax: #export (splice {parts (<code>.tuple (<>.some <code>.any))})
(wrap parts))
(syntax: #export (count {parts (<code>.tuple (<>.some <code>.any))})
(wrap (list (code.nat (list.size parts)))))
(syntax: #export (with_locals {locals (<code>.tuple (<>.some <code>.local_identifier))}
body)
(do {! meta.monad}
[g!locals (|> locals
(list\map meta.gensym)
(monad.seq !))]
(wrap (list (` (.with_expansions [(~+ (|> (list.zip/2 locals g!locals)
(list\map (function (_ [name identifier])
(list (code.local_identifier name) (as_is identifier))))
list\join))]
(~ body)))))))
(def: (name_side module_side? parser)
(-> Bit (Parser Name) (Parser Text))
(do <>.monad
[[module short] parser]
(wrap (if module_side?
(case module
"" short
_ module)
short))))
(def: (snippet module_side?)
(-> Bit (Parser Text))
(let [full_identifier (..name_side module_side? <code>.identifier)
full_tag (..name_side module_side? <code>.tag)]
($_ <>.either
<code>.text
(if module_side?
full_identifier
(<>.either <code>.local_identifier
full_identifier))
(if module_side?
full_tag
(<>.either <code>.local_tag
full_tag))
(<>\map bit\encode <code>.bit)
(<>\map nat\encode <code>.nat)
(<>\map int\encode <code>.int)
(<>\map rev\encode <code>.rev)
(<>\map frac\encode <code>.frac)
)))
(def: (part module_side?)
(-> Bit (Parser (List Text)))
(<code>.tuple (<>.many (..snippet module_side?))))
(syntax: #export (text {simple (..part false)})
(wrap (list (|> simple (text.join_with "") code.text))))
(template [<name> <simple> <complex>]
[(syntax: #export (<name> {name (<>.or (<>.and (..part true) (..part false))
(..part false))})
(case name
(#.Left [simple complex])
(wrap (list (<complex> [(text.join_with "" simple)
(text.join_with "" complex)])))
(#.Right simple)
(wrap (list (|> simple (text.join_with "") <simple>)))))]
[identifier code.local_identifier code.identifier]
[tag code.local_tag code.tag]
)
(type: Environment
(Dictionary Text Code))
(def: (apply env template)
(-> Environment Code Code)
(case template
[_ (#.Identifier "" name)]
(case (dictionary.get name env)
(#.Some substitute)
substitute
#.None
template)
(^template [<tag>]
[[meta (<tag> elems)]
[meta (<tag> (list\map (apply env) elems))]])
([#.Tuple]
[#.Form])
[meta (#.Record members)]
[meta (#.Record (list\map (: (-> [Code Code] [Code Code])
(function (_ [key value])
[(apply env key)
(apply env value)]))
members))]
_
template))
(type: Local
{#name Text
#parameters (List Text)
#template Code})
(exception: #export (irregular_arguments {expected Nat} {actual Nat})
(exception.report
["Expected" (\ nat.decimal encode expected)]
["Actual" (\ nat.decimal encode actual)]))
(def: (macro (^slots [#parameters #template]))
(-> Local Macro')
(function (_ inputs compiler)
(let [parameters_count (list.size parameters)
inputs_count (list.size inputs)]
(if (nat.= parameters_count inputs_count)
(let [environment (: Environment
(|> (list.zip/2 parameters inputs)
(dictionary.from_list text.hash)))]
(#.Right [compiler (list (..apply environment template))]))
(exception.throw ..irregular_arguments [parameters_count inputs_count])))))
(def: local
(Parser Local)
(do <>.monad
[[name parameters] (<code>.form (<>.and <code>.local_identifier
(<>.many <code>.local_identifier)))
template <code>.any]
(wrap {#name name
#parameters parameters
#template template})))
(exception: #export (cannot_shadow_definition {module Text} {definition Text})
(exception.report
["Module" (text.format module)]
["Definition" (text.format definition)]))
(def: (push module_name local module)
(-> Text Local Module (Try Module))
(let [definition (get@ #name local)]
(case (plist.get definition (get@ #.definitions module))
#.None
(#try.Success (update@ #.definitions
(plist.put definition
(#.Definition [false .Macro (' []) (..macro local)]))
module))
(#.Some _)
(exception.throw ..cannot_shadow_definition [module_name definition]))))
(syntax: (pop {locals (<>.some <code>.text)})
(do meta.monad
[here_name meta.current_module_name
here meta.current_module]
(function (_ compiler)
(#.Right [(let [definitions (list\fold plist.remove
(get@ #.definitions here)
locals)]
(update@ #.modules
(plist.put here_name (set@ #.definitions definitions here))
compiler))
(case (get@ #.expected compiler)
#.None
(list)
(#.Some _)
(list (' [])))]))))
(syntax: #export (with {locals (<code>.tuple (<>.some ..local))}
body)
(do meta.monad
[here_name meta.current_module_name
here meta.current_module]
(meta.with_gensyms [g!body]
(function (_ compiler)
(do try.monad
[here (monad.fold try.monad (..push here_name) here locals)
#let [compiler (update@ #.modules (plist.put here_name here) compiler)
pop! (` ((~! ..pop) (~+ (list\map (|>> (get@ #name) code.text)
locals))))]]
(wrap [compiler
(case (get@ #.expected compiler)
#.None
(list body
pop!)
(#.Some _)
(list (` (let [(~ g!body) (~ body)]
(exec (~ pop!)
(~ g!body))))))]))))))
|
