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|
local repr
repr = require('utils').repr
local insert, remove, concat
do
local _obj_0 = table
insert, remove, concat = _obj_0.insert, _obj_0.remove, _obj_0.concat
end
local Source
Source = require("code_obj").Source
local unpack = unpack or table.unpack
local AST = { }
AST.is_syntax_tree = function(n, t)
if t == nil then
t = nil
end
return type(n) == 'table' and getmetatable(n) and AST[n.type] == getmetatable(n) and (t == nil or n.type == t)
end
local types = {
"Number",
"Var",
"Block",
"EscapedNomsu",
"Text",
"List",
"Dict",
"DictEntry",
"IndexChain",
"Action",
"FileChunks",
"Method"
}
for _index_0 = 1, #types do
local name = types[_index_0]
local cls = { }
do
cls.__class = cls
cls.__index = cls
cls.__name = name
cls.type = name
cls.is_instance = function(self, x)
return getmetatable(x) == self
end
cls.__tostring = function(self)
return tostring(self.type) .. tostring(repr(self, (function(x)
return Source:is_instance(x) and tostring(x) or nil
end)))
end
cls.__repr = function(self)
return tostring(self.type) .. tostring(repr(self, (function(x)
return Source:is_instance(x) and tostring(x) or nil
end)))
end
cls.map = function(self, fn)
local replacement = fn(self)
if replacement == false then
return nil
end
if replacement then
if AST.is_syntax_tree(replacement) then
replacement = setmetatable((function()
local _tbl_0 = { }
for k, v in pairs(replacement) do
_tbl_0[k] = v
end
return _tbl_0
end)(), getmetatable(replacement))
replacement.source = self.source
if self.comments then
replacement.comments = {
unpack(self.comments)
}
end
end
else
replacement = {
source = self.source,
comments = self.comments and {
unpack(self.comments)
}
}
local changes = false
for k, v in pairs(self) do
local _continue_0 = false
repeat
replacement[k] = v
if AST.is_syntax_tree(v) then
local r = v:map(fn)
if r == v or r == nil then
_continue_0 = true
break
end
changes = true
replacement[k] = r
end
_continue_0 = true
until true
if not _continue_0 then
break
end
end
if not (changes) then
return self
end
replacement = setmetatable(replacement, getmetatable(self))
end
return replacement
end
cls.__eq = function(self, other)
if type(self) ~= type(other) or #self ~= #other or getmetatable(self) ~= getmetatable(other) then
return false
end
for i = 1, #self do
if self[i] ~= other[i] then
return false
end
end
if self.target ~= other.target then
return false
end
return true
end
end
AST[name] = setmetatable(cls, {
__tostring = function(self)
return self.__name
end,
__call = function(self, t)
if type(t.source) == 'string' then
t.source = Source:from_string(t.source)
else
assert(Source:is_instance(t.source))
end
setmetatable(t, self)
if t.__init then
t:__init()
end
return t
end
})
end
AST.Action.__init = function(self)
local stub_bits = { }
local arg_i = 1
for _index_0 = 1, #self do
local a = self[_index_0]
if type(a) == 'string' then
stub_bits[#stub_bits + 1] = a
else
stub_bits[#stub_bits + 1] = tostring(arg_i)
arg_i = arg_i + 1
end
end
self.stub = concat(stub_bits, " ")
end
AST.Action.get_args = function(self)
local _accum_0 = { }
local _len_0 = 1
for _index_0 = 1, #self do
local tok = self[_index_0]
if type(tok) ~= 'string' then
_accum_0[_len_0] = tok
_len_0 = _len_0 + 1
end
end
return _accum_0
end
return AST
|
