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
|
-- This file contains objects that are used to track code positions and incrementally
-- build up generated code, while keeping track of where it came from, and managing
-- indentation levels.
{:insert, :remove, :concat} = table
local LuaCode, NomsuCode, Source
export LINE_STARTS
class Source
new: (@filename, @start, @stop)=>
@from_string: (str)=>
filename,start,stop = str\match("^@(.-)%[(%d+):(%d+)%]$")
unless filename
filename,start = str\match("^@(.-)%[(%d+)%]$")
return @(filename or str, tonumber(start or 1), tonumber(stop))
@is_instance: (x)=> type(x) == 'table' and x.__class == @
__tostring: =>
if @stop
"@#{@filename}[#{@start}:#{@stop}]"
else
"@#{@filename}[#{@start}]"
__eq: (other)=>
getmetatable(@) == getmetatable(other) and @filename == other.filename and @start == other.start and @stop == other.stop
__lt: (other)=>
assert(@filename == other.filename, "Cannot compare sources from different files")
return if @start == other.start
(@stop or @start) < (other.stop or other.start)
else @start < other.start
__le: (other)=>
assert(@filename == other.filename, "Cannot compare sources from different files")
return if @start == other.start
(@stop or @start) <= (other.stop or other.start)
else @start <= other.start
__add: (offset)=>
if type(self) == 'number'
offset, self = self, offset
else if type(offset) != 'number' then error("Cannot add Source and #{type(offset)}")
return Source(@filename, @start+offset, @stop)
class Code
new: (@source, ...)=>
@bits, @indents, @current_indent = {}, {}, 0
@append(...)
if type(@source) == 'string'
@source = Source\from_string(@source)
assert(@source and Source\is_instance(@source))
append: (...)=>
n = select("#",...)
bits, indents = @bits, @indents
match = string.match
for i=1,n
b = select(i, ...)
assert(b)
bits[#bits+1] = b
if type(b) == 'string'
if spaces = match(b, "\n([ ]*)[^\n]*$")
@current_indent = #spaces
elseif @current_indent != 0
indents[#bits] = @current_indent
@__str = nil
concat_append: (values, joiner)=>
bits, indents = @bits, @indents
match = string.match
for i=1,#values
b = values[i]
assert(b)
if i > 1
bits[#bits+1] = joiner
bits[#bits+1] = b
if type(b) == 'string'
if spaces = match(b, "\n([ ]*)[^\n]*$")
@current_indent = #spaces
elseif @current_indent != 0
indents[#bits] = @current_indent
@__str = nil
prepend: (...)=>
n = select("#",...)
bits, indents = @bits, @indents
for i=#bits+n,n+1,-1
bits[i] = bits[i-n]
for i=1,n
bits[i] = select(i, ...)
@current_indent = 0
for i,b in ipairs(bits)
if type(b) == 'string'
if spaces = b\match("\n([ ]*)[^\n]*$")
@current_indent = #spaces
elseif @current_indent != 0
indents[i] = @current_indent
else indents[i] = nil
@__str = nil
class LuaCode extends Code
new: (...)=>
super ...
@free_vars = {}
@is_value = false
@__str = nil
@Value = (...)->
lua = LuaCode(...)
lua.is_value = true
return lua
add_free_vars: (vars)=>
return unless #vars > 0
seen = {[v]:true for v in *@free_vars}
for var in *vars
unless seen[var]
@free_vars[#@free_vars+1] = var
seen[var] = true
@__str = nil
remove_free_vars: (vars)=>
return unless #vars > 0
removals = {}
for var in *vars
removals[var[1]] = true
stack = {self}
while #stack > 0
lua, stack[#stack] = stack[#stack], nil
for i=#lua.free_vars,1,-1
if removals[lua.free_vars[i][1]]
remove lua.free_vars, i
for b in *lua.bits
if type(b) != 'string'
stack[#stack+1] = b
@__str = nil
as_statements: (prefix="", suffix=";")=>
unless @is_value
return self
statements = LuaCode(@source)
if prefix != ""
statements\append prefix
statements\append self
if suffix != ""
statements\append suffix
return statements
declare_locals: (to_declare=nil)=>
if to_declare == nil
to_declare, seen = {}, {}
gather_from = =>
for var in *@free_vars
unless seen[var]
seen[var] = true
to_declare[#to_declare+1] = var
for bit in *@bits
if bit.__class == LuaCode
gather_from bit
gather_from self
if #to_declare > 0
@remove_free_vars to_declare
@prepend "local #{concat [type(v) == 'string' and v or string.as_lua_id(v[1]) for v in *to_declare], ", "};\n"
return to_declare
__tostring: =>
if @__str == nil
buff, indents = {}, @indents
for i,b in ipairs @bits
b = tostring(b)
if indents[i]
b = b\gsub("\n", "\n"..((" ")\rep(indents[i])))
buff[#buff+1] = b
@__str = concat(buff, "")
return @__str
__len: =>
#tostring(self)
make_offset_table: =>
-- Return a mapping from output (lua) character number to input (nomsu) character number
lua_to_nomsu, nomsu_to_lua = {}, {}
walk = (lua, pos)->
for b in *lua.bits
if type(b) == 'string'
if lua.source
lua_to_nomsu[pos] = lua.source.start
nomsu_to_lua[lua.source.start] = pos
else
walk b, pos
pos += #tostring(b)
walk self, 1
return {
nomsu_filename:@source.filename
lua_filename:tostring(@source)..".lua", lua_file:@stringify!
:lua_to_nomsu, :nomsu_to_lua
}
parenthesize: =>
if @is_value
@prepend "("
@append ")"
else
error "Cannot parenthesize lua statements"
class NomsuCode extends Code
__tostring: =>
if @__str == nil
buff, indents = {}, @indents
for i,b in ipairs @bits
b = tostring(b)
if indents[i]
b = b\gsub("\n", "\n"..((" ")\rep(indents[i])))
buff[#buff+1] = b
@__str = concat(buff, "")
return @__str
__len: =>
#tostring(self)
parenthesize: =>
@prepend "("
@append ")"
return {:Code, :NomsuCode, :LuaCode, :Source}
|
