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
|
#
This File contains actions for making actions and compile-time actions and some helper
functions to make that easier.
# Compile-time action to make compile-time actions:
immediately
lua> ".."
A_give_1_nickname_2 = compile_time(function(tree, \%action, \%nickname, is_compile_time)
local function arg_to_string(a) return tostring(nomsu:tree_to_lua(a)) end
local action_args = table.map(\%action:get_args(), arg_to_string)
local nickname_args = table.map(\%nickname:get_args(), arg_to_string)
if utils.equivalent(action_args, nickname_args) then
return Lua(tree.source, "A", string.as_lua_id(\%nickname.stub), " = A", string.as_lua_id(\%action.stub))
end
local lua = Lua(tree.source, "A", string.as_lua_id(\%nickname.stub), " = ")
if is_compile_time or COMPILE_TIME[_ENV["A"..string.as_lua_id(\%action.stub)]] then
lua:append("compile_time")
table.insert(action_args, 1, "tree")
table.insert(nickname_args, 1, "tree")
end
lua:append("(function(")
lua:concat_append(nickname_args, ", ")
lua:append(")\n return A", string.as_lua_id(\%action.stub), "(")
lua:concat_append(action_args, ", ")
lua:append(")\nend)")
return lua
end)
__MANGLE_INDEX = 0
A_parse_1_as_2 = compile_time(function(tree, \%actions, \%body)
local replacements = {}
for i,arg in ipairs(\%actions[1]:get_args()) do
replacements[arg[1]] = tostring(nomsu:tree_to_lua(arg))
end
local function make_tree(t)
if not AST.is_syntax_tree(t) then
return repr(t)
elseif t.type ~= 'Var' then
local args = table.map(t, make_tree)
table.insert(args, 1, repr(tostring(t.source)))
return t.type.."("..table.concat(args, ", ")..")"
elseif replacements[t[1]] then
return replacements[t[1]]
else
return t.type.."("..repr(tostring(t.source))..", "..repr(t[1].." \\0").."..('%X'):format(__MANGLE_INDEX))"
end
end
local lua = Lua(tree.source, "A", string.as_lua_id(\%actions[1].stub), " = compile_time(function(tree")
for _,arg in ipairs(\%actions[1]:get_args()) do
lua:append(", ", nomsu:tree_to_lua(arg))
end
lua:append(")\n __MANGLE_INDEX = __MANGLE_INDEX + 1",
"\n local tree = ", make_tree(\%body),
"\n local lua = nomsu:tree_to_lua(tree)",
"\n lua:remove_free_vars({")
local vars = table.map(\%actions[1]:get_args(), function(a)
return "Var("..repr(tostring(a.source))..", "..repr(a[1])..")"
end)
lua:concat_append(vars, ", ")
lua:append("})\n return lua\nend)")
for i=2,#\%actions do
lua:append("\n", A_give_1_nickname_2(\%actions[i], \%actions[1], \%actions[i], true))
end
return lua
end)
A_action_1_2 = compile_time(function(tree, \%actions, \%body, is_compile_time)
local lua = Lua(tree.source, "A", string.as_lua_id(\%actions[1].stub), " = ")
if is_compile_time then lua:append("compile_time") end
lua:append("(function(")
local args = \%actions[1]:get_args()
local lua_args = table.map(args, function(a) return nomsu:tree_to_lua(a) end)
if is_compile_time then table.insert(lua_args, 1, "tree") end
lua:concat_append(lua_args, ", ")
local body_lua = nomsu:tree_to_lua(\%body):as_statements("return ")
body_lua:remove_free_vars(args)
body_lua:declare_locals()
lua:append(")\n ", body_lua, "\nend)")
for i=2,#\%actions do
lua:append("\n", A_give_1_nickname_2(\%actions[i], \%actions[1], \%actions[i], is_compile_time))
end
return lua
end)
A_compile_1_to_2 = compile_time(function(tree, \%actions, \%body)
return A_action_1_2(tree, \%actions, \%body, true)
end)
compile [remove action %action] to
Lua ".."
A\(=lua "string.as_lua_id(\(%action.stub))") = nil
ARG_ORDERS[fn] = nil
COMPILE_TIME[fn] = nil
immediately
action [read file %filename]
lua> ".."
local file = io.open(\%filename)
local contents = file:read("*a")
file:close()
return contents
action [sh> %cmd]
lua> ".."
local result = io.popen(\%cmd)
local contents = result:read("*a")
result:close()
return contents
action [%tree as nomsu]
=lua "nomsu:tree_to_nomsu(\%tree)"
action [%tree as inline nomsu]
=lua "nomsu:tree_to_nomsu(\%tree, true)"
action [%tree as lua]
=lua "nomsu:tree_to_lua(\%tree)"
action [%tree as lua expr]
lua> ".."
local lua = nomsu:tree_to_lua(\%tree)
if not lua.is_value then
compile_error(\%tree, "Invalid thing to convert to lua expr:\n%s")
end
return lua
action [%tree as lua statements]
=lua "nomsu:tree_to_lua(\%tree):as_statements()"
action [%tree as lua return]
=lua "nomsu:tree_to_lua(\%tree):as_statements('return ')"
action [%var as lua identifier]
=lua "type(\%var) == 'string' and string.as_lua_id(\%var) or nomsu:tree_to_lua(\%var)"
immediately
compile [parse %text] to
Lua value ".."
nomsu:parse(Nomsu("\("\(%text.source)")", \(%text as lua expr)))
immediately
compile [%tree with %t -> %replacement] to
Lua value ".."
\(%tree as lua expr):map(function(\(%t as lua expr))
\(%replacement as lua return)
end)
compile [declare locals in %code] to
Lua value "\(%code as lua expr):declare_locals()"
compile [declare locals %locals in %code] to
Lua value "\(%code as lua expr):declare_locals(\(%locals as lua expr))"
compile [remove free vars %vars from %code] to
Lua "\(%code as lua expr):remove_free_vars(\(%vars as lua expr));"
action [%tree as value]
lua> ".."
if \%tree.type == 'Text' and #\%tree == 1 and type(\%tree[1]) == 'string' then
return \%tree[1]
end
local lua = Lua(\%tree.source, "return ",nomsu:tree_to_lua(\%tree))
return nomsu:run_lua(lua)
immediately
parse [%lua <-write %code, to %lua write %code] as: lua> "\%lua:append(\%code);"
immediately
compile [quote %s] to
Lua value ".."
('"'..\(%s as lua expr):gsub("\\\\", "\\\\\\\\"):gsub("\n","\\\\n"):gsub('"', '\\\\"')..'"')
compile [type of %obj] to: Lua value "type(\(%obj as lua expr))"
immediately
compile [nomsu] to: Lua value "nomsu"
# Compiler tools
immediately
compile [run %code] to
Lua value "nomsu:run(Nomsu(\(quote "\(%code.source)"), \(%code as lua expr)))"
immediately
compile [show lua %block] to
lua> ".."
local \%lua = nomsu:tree_to_lua(\%block);
return Lua(tree.source, "print(", repr(tostring(\%lua)), ");");
immediately
compile [say %message] to
lua> ".."
if \%message.type == "Text" then
return Lua(tree.source, "io.write(", \(%message as lua expr), ", '\\\\n');");
else
return Lua(tree.source, "io.write(tostring(", \(%message as lua expr), "), '\\\\n');");
end
compile [ask %prompt] to
lua> ".."
if \%prompt.type == "Text" then
return Lua.Value(tree.source, "(io.write(", \(%prompt as lua expr), ") and io.read())");
else
return Lua.Value(tree.source, "(io.write(tostring(", \(%prompt as lua expr), ")) and io.read())");
end
# Return
immediately
# Return statement is wrapped in a do..end block because Lua is unhappy if you
put code after a return statement, unless you wrap it in a block.
compile [return] to: Lua "do return; end"
compile [return %return_value] to: Lua "do return \(%return_value as lua expr); end"
# Error functions
immediately
compile [traceback] to: Lua value "debug.traceback()"
compile [traceback %] to: Lua value "debug.traceback('', \(% as lua expr))"
compile [barf] to: Lua "error(nil, 0);"
compile [barf %msg] to: Lua "error(\(%msg as lua expr), 0);"
compile [assume %condition] to
lua> "local \%assumption = 'Assumption failed: '..tostring(nomsu:tree_to_nomsu(\%condition));"
return
Lua ".."
if not \(%condition as lua expr) then
error(\(quote "\%assumption"), 0);
end
compile [assume %condition or barf %message] to
Lua ".."
if not \(%condition as lua expr) then
error(\(%message as lua expr), 0);
end
# Literals
immediately
compile [yes] to: Lua value "true"
compile [no] to: Lua value "false"
compile [nothing, nil, null] to: Lua value "nil"
|
