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
|
#..
This File contains rules for making rules and macros and some helper functions to make
that easier.
# Rule to make macros:
immediately:
lua> ".."
nomsu:defmacro("compile %macro_def to %body", function(nomsu, vars)
nomsu:assert(\%macro_def.type == "List",
"Invalid type for compile definition signature. Expected List, but got: "..tostring(\%macro_def.type));
nomsu:assert(\%body.type == "Block",
"Invalid type for compile definition body. Expected Block, but got: "..tostring(\%body.type));
local signature = {};
for i, alias in ipairs(\%macro_def.value) do
signature[i] = alias.src;
end
local body_lua = nomsu:tree_to_lua(\%body);
body_lua = body_lua.statements or ("return "..body_lua.expr..";");
local lua = ([[
do
local function macro(nomsu, vars)
%s
end
local function macro_wrapper(...) return {expr=macro(...)}; end
nomsu:defmacro(%s, macro_wrapper, %s);
end]]):format(body_lua, nomsu:repr(signature), nomsu:repr(("compile %s\\n..to code %s"):format(\%macro_def.src, \%body.src)));
return {statements=lua};
end, \(__src__ 1));
lua> ".."
nomsu:defmacro("compile %macro_def to code %body", function(nomsu, vars)
nomsu:assert(\%macro_def.type == "List",
"Invalid type for compile definition signature. Expected List, but got: "..tostring(\%macro_def.type));
nomsu:assert(\%body.type == "Block",
"Invalid type for compile definition body. Expected Block, but got: "..tostring(\%body.type));
local signature = {};
for i, alias in ipairs(\%macro_def.value) do
signature[i] = alias.src;
end
local body_lua = nomsu:tree_to_lua(\%body);
body_lua = body_lua.statements or ("return "..body_lua.expr..";");
local lua = ([[
do
local function macro(nomsu, vars)
%s
end
local function macro_wrapper(...) return {statements=macro(...)}; end
nomsu:defmacro(%s, macro_wrapper, %s);
end]]):format(body_lua, nomsu:repr(signature), nomsu:repr(("compile %s\\n..to code %s"):format(\%macro_def.src, \%body.src)));
return {statements=lua};
end, \(__src__ 1));
compile [rand] to: "math.random()"
# Rule to make rules:
immediately:
compile [rule %signature = %body] to code:
lua> ".."
nomsu:assert(\%signature.type == "List",
"Invalid type for rule definition signature. Expected List, but got: "..tostring(\%signature.type));
nomsu:assert(\%body.type == "Block",
"Invalid type for rule definition body. Expected Block, but got: "..tostring(\%body.type));
local signature = {};
for i, alias in ipairs(\%signature.value) do
signature[i] = alias.src;
end
local body_lua = nomsu:tree_to_lua(\%body);
body_lua = body_lua.statements or ("return "..body_lua.expr..";");
local src = nomsu:dedent(nomsu:source_code(0));
local def_lua = ([[
nomsu:def(%s, function(nomsu, vars)
%s
end, %s);]]):format(nomsu:repr(signature), body_lua, nomsu:repr(src));
return def_lua;
# Rule to make nomsu macros:
immediately:
lua> ".."
nomsu:defmacro("parse %shorthand as %longhand", (function(nomsu, vars)
nomsu:assert(\%shorthand.type == "List",
"Invalid type for parse definition signature. Expected List, but got: "..tostring(\%shorthand.type));
nomsu:assert(\%longhand.type == "Block",
"Invalid type for parse definition body. Expected Block, but got: "..tostring(\%longhand.type));
local signature = {};
for i, alias in ipairs(\%shorthand.value) do
signature[i] = alias.src;
end
local template = {};
for i, line in ipairs(\%longhand.value) do
template[i] = nomsu:dedent(line.src);
end
signature, template = nomsu:repr(signature), nomsu:repr(table.concat(template, "\\n"));
return {expr=([[
nomsu:defmacro(%s, (function(nomsu, vars)
local template = nomsu:parse(%s, %s);
if #template.value == 1 then template = template.value[1]; end
local replacement = nomsu:replaced_vars(template, vars);
return nomsu:tree_to_lua(replacement);
end), %s)]]):format(signature, template, nomsu:repr(\%shorthand.line_no), nomsu:repr(nomsu:source_code(0)))};
end), \(__src__ 1));
rule [remove rule %stub] =:
lua> ".."
local def = nomsu.defs[\%stub];
for _, alias in ipairs(def.aliases) do
nomsu.defs[alias] = false;
end
immediately:
rule [%tree as lua] =:
=lua "nomsu:tree_to_lua(\%tree).expr"
rule [%tree as lua statements] =:
lua> ".."
local lua = nomsu:tree_to_lua(\%tree);
return lua.statements or (lua.expr..";");
rule [%tree as value] =:
=lua "nomsu:tree_to_value(\%tree, vars)"
compile [repr %obj] to:
"nomsu:repr(\(%obj as lua))"
compile [indented %obj] to:
"nomsu:indent(\(%obj as lua))"
compile [dedented %obj] to:
"nomsu:dedent(\(%obj as lua))"
compile [type %obj, type of %obj] to:
"type(\(%obj as lua))"
parse [lua do> %block] as:
lua> "do"
lua> %block
lua> "end"
compile [nomsu] to: "nomsu"
compile [nomsu's %key] to: "nomsu[\(%key as lua)]"
compile [nomsu %method %args] to: "nomsu[\(%method as lua)](nomsu, unpack(\(%args as lua)))"
compile [tree %tree with %replacements] to: ".."
nomsu:replaced_vars(\(%tree as lua), \(%replacements as lua))
parse [rule %signature] as:
(nomsu's "defs")->(nomsu "get_stub" [\%signature])
# Get the source code for a function
rule [help %rule] =:
lua> ".."
local fn_def = nomsu.defs[nomsu:get_stub(\%rule)]
if not fn_def then
nomsu:writeln("Rule not found: "..nomsu:repr(\%rule));
else
nomsu:writeln(fn_def.src or "<unknown source code>");
end
# Compiler tools
parse [eval %code, run %code] as: nomsu "run" [%code]
rule [source code from tree %tree] =:
lua> ".."
local _,_,leading_space = \%tree.src:find("\\n(%s*)%S");
if leading_space then
local chunk1, chunk2 = \%tree.src:match(":%s*([^\\n]*)(\\n.*)");
chunk2 = chunk2:gsub("\\n"..leading_space, "\\n");
return chunk1..chunk2.."\\n";
else
return \%tree.src:match(":%s*(%S.*)").."\\n";
end
parse [source code %body] as: source code from tree \%body
parse [parse tree %code] as: nomsu "tree_to_str" [\%code]
parse [enable debugging] as: lua> "nomsu.debug = true"
parse [disable debugging] as: lua> "nomsu.debug = false"
|
