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Copy pathtransform.lua
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923 lines (923 loc) · 21.1 KB
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module("moonscript.transform", package.seeall)
local types = require("moonscript.types")
local util = require("moonscript.util")
local data = require("moonscript.data")
local reversed = util.reversed
local ntype, build, smart_node, is_slice = types.ntype, types.build, types.smart_node, types.is_slice
local insert = table.insert
local is_value
is_value = function(stm)
return moonscript.compile.Block:is_value(stm) or Value:can_transform(stm)
end
NameProxy = (function()
local _parent_0 = nil
local _base_0 = {
get_name = function(self, scope)
if not self.name then
self.name = scope:free_name(self.prefix, true)
end
return self.name
end,
chain = function(self, ...)
local items = {
...
}
items = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = items
for _index_0 = 1, #_list_0 do
local i = _list_0[_index_0]
local _value_0
if type(i) == "string" then
_value_0 = {
"dot",
i
}
else
_value_0 = i
end
if _value_0 ~= nil then
_len_0 = _len_0 + 1
_accum_0[_len_0] = _value_0
end
end
return _accum_0
end)()
return build.chain({
base = self,
unpack(items)
})
end,
index = function(self, key)
return build.chain({
base = self,
{
"index",
key
}
})
end,
__tostring = function(self)
if self.name then
return ("name<%s>"):format(self.name)
else
return ("name<prefix(%s)>"):format(self.prefix)
end
end
}
_base_0.__index = _base_0
if _parent_0 then
setmetatable(_base_0, getmetatable(_parent_0).__index)
end
local _class_0 = setmetatable({
__init = function(self, prefix)
self.prefix = prefix
self[1] = "temp_name"
end
}, {
__index = _base_0,
__call = function(cls, ...)
local _self_0 = setmetatable({}, _base_0)
cls.__init(_self_0, ...)
return _self_0
end
})
_base_0.__class = _class_0
return _class_0
end)()
Run = (function()
local _parent_0 = nil
local _base_0 = {
call = function(self, state)
return self.fn(state)
end
}
_base_0.__index = _base_0
if _parent_0 then
setmetatable(_base_0, getmetatable(_parent_0).__index)
end
local _class_0 = setmetatable({
__init = function(self, fn)
self.fn = fn
self[1] = "run"
end
}, {
__index = _base_0,
__call = function(cls, ...)
local _self_0 = setmetatable({}, _base_0)
cls.__init(_self_0, ...)
return _self_0
end
})
_base_0.__class = _class_0
return _class_0
end)()
local apply_to_last
apply_to_last = function(stms, fn)
local last_exp_id = 0
for i = #stms, 1, -1 do
local stm = stms[i]
if stm and util.moon.type(stm) ~= Run then
last_exp_id = i
break
end
end
return (function()
local _accum_0 = { }
local _len_0 = 0
for i, stm in ipairs(stms) do
local _value_0
if i == last_exp_id then
_value_0 = fn(stm)
else
_value_0 = stm
end
if _value_0 ~= nil then
_len_0 = _len_0 + 1
_accum_0[_len_0] = _value_0
end
end
return _accum_0
end)()
end
local is_singular
is_singular = function(body)
if #body ~= 1 then
return false
end
if "group" == ntype(body) then
return is_singular(body[2])
else
return true
end
end
local constructor_name = "new"
local Transformer
Transformer = (function()
local _parent_0 = nil
local _base_0 = {
transform = function(self, scope, node, ...)
if self.seen_nodes[node] then
return node
end
self.seen_nodes[node] = true
while true do
local transformer = self.transformers[ntype(node)]
local res
if transformer then
res = transformer(scope, node, ...) or node
else
res = node
end
if res == node then
return node
end
node = res
end
end,
__call = function(self, node, ...)
return self:transform(self.scope, node, ...)
end,
instance = function(self, scope)
return Transformer(self.transformers, scope)
end,
can_transform = function(self, node)
return self.transformers[ntype(node)] ~= nil
end
}
_base_0.__index = _base_0
if _parent_0 then
setmetatable(_base_0, getmetatable(_parent_0).__index)
end
local _class_0 = setmetatable({
__init = function(self, transformers, scope)
self.transformers, self.scope = transformers, scope
self.seen_nodes = { }
end
}, {
__index = _base_0,
__call = function(cls, ...)
local _self_0 = setmetatable({}, _base_0)
cls.__init(_self_0, ...)
return _self_0
end
})
_base_0.__class = _class_0
return _class_0
end)()
local construct_comprehension
construct_comprehension = function(inner, clauses)
local current_stms = inner
for _, clause in reversed(clauses) do
local t = clause[1]
if t == "for" then
local _, names, iter = unpack(clause)
current_stms = {
"foreach",
names,
iter,
current_stms
}
elseif t == "when" then
local _, cond = unpack(clause)
current_stms = {
"if",
cond,
current_stms
}
else
current_stms = error("Unknown comprehension clause: " .. t)
end
current_stms = {
current_stms
}
end
return current_stms[1]
end
Statement = Transformer({
assign = function(self, node)
local _, names, values = unpack(node)
if #values == 1 and types.cascading[ntype(values[1])] then
values[1] = self.transform.statement(values[1], function(stm)
local t = ntype(stm)
if is_value(stm) then
return {
"assign",
names,
{
stm
}
}
else
return stm
end
end)
return build.group({
{
"declare",
names
},
values[1]
})
else
return node
end
end,
export = function(self, node)
if #node > 2 then
if node[2] == "class" then
local cls = smart_node(node[3])
return build.group({
{
"export",
{
cls.name
}
},
cls
})
else
return build.group({
node,
build.assign({
names = node[2],
values = node[3]
})
})
end
else
return nil
end
end,
update = function(self, node)
local _, name, op, exp = unpack(node)
local op_final = op:match("^(.+)=$")
if not op_final then
error("Unknown op: " .. op)
end
return build.assign_one(name, {
"exp",
name,
op_final,
exp
})
end,
import = function(self, node)
local _, names, source = unpack(node)
local stubs = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = names
for _index_0 = 1, #_list_0 do
local name = _list_0[_index_0]
local _value_0
if type(name) == "table" then
_value_0 = name
else
_value_0 = {
"dot",
name
}
end
if _value_0 ~= nil then
_len_0 = _len_0 + 1
_accum_0[_len_0] = _value_0
end
end
return _accum_0
end)()
local real_names = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = names
for _index_0 = 1, #_list_0 do
local name = _list_0[_index_0]
local _value_0 = type(name) == "table" and name[2] or name
if _value_0 ~= nil then
_len_0 = _len_0 + 1
_accum_0[_len_0] = _value_0
end
end
return _accum_0
end)()
if type(source) == "string" then
return build.assign({
names = real_names,
values = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = stubs
for _index_0 = 1, #_list_0 do
local stub = _list_0[_index_0]
_len_0 = _len_0 + 1
_accum_0[_len_0] = build.chain({
base = source,
stub
})
end
return _accum_0
end)()
})
else
local source_name = NameProxy("table")
return build.group({
{
"declare",
real_names
},
build["do"]({
build.assign_one(source_name, source),
build.assign({
names = real_names,
values = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = stubs
for _index_0 = 1, #_list_0 do
local stub = _list_0[_index_0]
_len_0 = _len_0 + 1
_accum_0[_len_0] = build.chain({
base = source_name,
stub
})
end
return _accum_0
end)()
})
})
})
end
end,
comprehension = function(self, node, action)
local _, exp, clauses = unpack(node)
action = action or function(exp)
return {
exp
}
end
local out = construct_comprehension(action(exp, clauses))
return print(util.dump(out))
end,
["if"] = function(self, node, ret)
if ret then
smart_node(node)
node['then'] = apply_to_last(node['then'], ret)
for i = 4, #node do
local case = node[i]
local body_idx = #node[i]
case[body_idx] = apply_to_last(case[body_idx], ret)
end
end
return node
end,
with = function(self, node, ret)
local _, exp, block = unpack(node)
local scope_name = NameProxy("with")
return build["do"]({
build.assign_one(scope_name, exp),
Run(function(self)
return self:set("scope_var", scope_name)
end),
build.group(block),
(function()
if ret then
return ret(scope_name)
end
end)()
})
end,
foreach = function(self, node)
smart_node(node)
if ntype(node.iter) == "unpack" then
local list = node.iter[2]
local index_name = NameProxy("index")
local list_name = NameProxy("list")
local slice_var = nil
local bounds
if is_slice(list) then
local slice = list[#list]
table.remove(list)
table.remove(slice, 1)
if slice[2] and slice[2] ~= "" then
local max_tmp_name = NameProxy("max")
slice_var = build.assign_one(max_tmp_name, slice[2])
slice[2] = {
"exp",
max_tmp_name,
"<",
0,
"and",
{
"length",
list_name
},
"+",
max_tmp_name,
"or",
max_tmp_name
}
else
slice[2] = {
"length",
list_name
}
end
bounds = slice
else
bounds = {
1,
{
"length",
list_name
}
}
end
return build.group({
build.assign_one(list_name, list),
slice_var,
build["for"]({
name = index_name,
bounds = bounds,
body = {
{
"assign",
node.names,
{
list_name:index(index_name)
}
},
build.group(node.body)
}
})
})
end
end,
class = function(self, node)
local _, name, parent_val, tbl = unpack(node)
local constructor = nil
local properties = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = tbl[2]
for _index_0 = 1, #_list_0 do
local entry = _list_0[_index_0]
local _value_0
if entry[1] == constructor_name then
constructor = entry[2]
_value_0 = nil
else
_value_0 = entry
end
if _value_0 ~= nil then
_len_0 = _len_0 + 1
_accum_0[_len_0] = _value_0
end
end
return _accum_0
end)()
tbl[2] = properties
local parent_cls_name = NameProxy("parent")
local base_name = NameProxy("base")
local self_name = NameProxy("self")
local cls_name = NameProxy("class")
if not constructor then
constructor = build.fndef({
args = {
{
"..."
}
},
arrow = "fat",
body = {
build["if"]({
cond = parent_cls_name,
["then"] = {
build.chain({
base = "super",
{
"call",
{
"..."
}
}
})
}
})
}
})
else
smart_node(constructor)
constructor.arrow = "fat"
end
local cls = build.table({
{
"__init",
constructor
}
})
local cls_mt = build.table({
{
"__index",
base_name
},
{
"__call",
build.fndef({
args = {
{
"cls"
},
{
"..."
}
},
body = {
build.assign_one(self_name, build.chain({
base = "setmetatable",
{
"call",
{
"{}",
base_name
}
}
})),
build.chain({
base = "cls.__init",
{
"call",
{
self_name,
"..."
}
}
}),
self_name
}
})
}
})
cls = build.chain({
base = "setmetatable",
{
"call",
{
cls,
cls_mt
}
}
})
local value = nil
do
local _with_0 = build
value = _with_0.block_exp({
Run(function(self)
return self:set("super", function(block, chain)
local calling_name = block:get("current_block")
local slice = (function()
local _accum_0 = { }
local _len_0 = 0
local _list_0 = chain
for _index_0 = 3, #_list_0 do
local item = _list_0[_index_0]
_len_0 = _len_0 + 1
_accum_0[_len_0] = item
end
return _accum_0
end)()
slice[1] = {
"call",
{
"self",
unpack(slice[1][2])
}
}
local act
if ntype(calling_name) ~= "value" then
act = "index"
else
act = "dot"
end
return {
"chain",
parent_cls_name,
{
act,
calling_name
},
unpack(slice)
}
end)
end),
_with_0.assign_one(parent_cls_name, parent_val == "" and "nil" or parent_val),
_with_0.assign_one(base_name, tbl),
_with_0.assign_one(base_name:chain("__index"), base_name),
build["if"]({
cond = parent_cls_name,
["then"] = {
_with_0.chain({
base = "setmetatable",
{
"call",
{
base_name,
_with_0.chain({
base = "getmetatable",
{
"call",
{
parent_cls_name
}
},
{
"dot",
"__index"
}
})
}
}
})
}
}),
_with_0.assign_one(cls_name, cls),
_with_0.assign_one(base_name:chain("__class"), cls_name),
cls_name
})
value = _with_0.group({
_with_0.declare({
names = {
name
}
}),
_with_0.assign({
names = {
name
},
values = {
value
}
})
})
end
return value
end
})
local Accumulator
Accumulator = (function()
local _parent_0 = nil
local _base_0 = {
body_idx = {
["for"] = 4,
["while"] = 3,
foreach = 4
},
convert = function(self, node)
local index = self.body_idx[ntype(node)]
node[index] = self:mutate_body(node[index])
return self:wrap(node)
end,
wrap = function(self, node)
return build.block_exp({
build.assign_one(self.accum_name, build.table()),
build.assign_one(self.len_name, 0),
node,
self.accum_name
})
end,
mutate_body = function(self, body, skip_nil)
if skip_nil == nil then
skip_nil = true
end
local val
if not skip_nil and is_singular(body) then
do
local _with_0 = body[1]
body = { }
val = _with_0
end
else
body = apply_to_last(body, function(n)
return build.assign_one(self.value_name, n)
end)
val = self.value_name
end
local update = {
{
"update",
self.len_name,
"+=",
1
},
build.assign_one(self.accum_name:index(self.len_name), val)
}
if skip_nil then
table.insert(body, build["if"]({
cond = {
"exp",
self.value_name,
"!=",
"nil"
},
["then"] = update
}))
else
table.insert(body, build.group(update))
end
return body
end
}
_base_0.__index = _base_0
if _parent_0 then
setmetatable(_base_0, getmetatable(_parent_0).__index)
end
local _class_0 = setmetatable({
__init = function(self)
self.accum_name = NameProxy("accum")
self.value_name = NameProxy("value")
self.len_name = NameProxy("len")
end
}, {
__index = _base_0,
__call = function(cls, ...)
local _self_0 = setmetatable({}, _base_0)
cls.__init(_self_0, ...)
return _self_0
end
})
_base_0.__class = _class_0
return _class_0
end)()
local default_accumulator
default_accumulator = function(self, node)
return Accumulator():convert(node)
end
local implicitly_return
implicitly_return = function(scope)
local fn
fn = function(stm)
local t = ntype(stm)
if types.manual_return[t] or not is_value(stm) then
return stm
elseif types.cascading[t] then
return scope.transform.statement(stm, fn)
else
return {
"return",
stm
}
end
end
return fn
end
Value = Transformer({
["for"] = default_accumulator,
["while"] = default_accumulator,
foreach = default_accumulator,
comprehension = function(self, node)
local a = Accumulator()
node = self.transform.statement(node, function(exp)
return a:mutate_body({
exp
}, false)
end)
return a:wrap(node)
end,
tblcomprehension = function(self, node)
local key_exp, value_exp, clauses = unpack(node)
print(util.dump(node))
return "hello_world"
end,
fndef = function(self, node)
smart_node(node)
node.body = apply_to_last(node.body, implicitly_return(self))
return node
end,
["if"] = function(self, node)
return build.block_exp({
node
})
end,
with = function(self, node)
return build.block_exp({
node
})
end,
chain = function(self, node)
local stub = node[#node]
if type(stub) == "table" and stub[1] == "colon_stub" then
table.remove(node, #node)
local base_name = NameProxy("base")
local fn_name = NameProxy("fn")
return self.transform.value(build.block_exp({
build.assign({
names = {
base_name
},
values = {
node
}
}),
build.assign({
names = {
fn_name
},
values = {
build.chain({
base = base_name,
{
"dot",
stub[2]
}
})
}
}),
build.fndef({
args = {
{
"..."
}
},
body = {
build.chain({
base = fn_name,
{
"call",
{
base_name,
"..."
}
}
})
}
})
}))
end
end,
block_exp = function(self, node)
local _, body = unpack(node)
local fn = nil
local arg_list = { }
insert(body, Run(function(self)
if self.has_varargs then
insert(arg_list, "...")
return insert(fn.args, {
"..."
})
end
end))
fn = smart_node(build.fndef({
body = body
}))
return build.chain({
base = {
"parens",
fn
},
{
"call",
arg_list
}
})
end
})