nomsu/nomsu_tree.lua

local utils = require('utils')
local re = require('re')
local repr, stringify, min, max, equivalent, set, is_list, sum
repr, stringify, min, max, equivalent, set, is_list, sum = utils.repr, utils.stringify, utils.min, utils.max, utils.equivalent, utils.set, utils.is_list, utils.sum
local immutable = require('immutable')
local insert, remove, concat
do
  local _obj_0 = table
  insert, remove, concat = _obj_0.insert, _obj_0.remove, _obj_0.concat
end
local Lua, Location
do
  local _obj_0 = require("lua_obj")
  Lua, Location = _obj_0.Lua, _obj_0.Location
end
local Types = { }
Types.DictEntry = immutable({
  "key",
  "value"
}, {
  name = "DictEntry"
})
Types.is_node = function(n)
  return type(n) == 'userdata' and getmetatable(n) and Types[n.type] == getmetatable(n)
end
local Tree
Tree = function(name, methods)
  do
    methods.__tostring = function(self)
      return tostring(self.name) .. "(" .. tostring(repr(self.value)) .. ", " .. tostring(repr(self.source)) .. ")"
    end
    methods.with_value = function(self, value)
      return getmetatable(self)(value, self.source)
    end
    methods.type = name
    methods.name = name
    methods.as_nomsu = function(self)
      local leading_space = 0
      local src_file = FILE_CACHE[self.source.filename]
      while src_file:sub(self.source.start - leading_space - 1, self.source.start - leading_space - 1) == " " do
        leading_space = leading_space + 1
      end
      if src_file:sub(self.source.start - leading_space - 1, self.source.start - leading_space - 1) ~= "\n" then
        leading_space = 0
      end
      local ret = tostring(self.source:get_text()):gsub("\n" .. ((" "):rep(leading_space)), "\n")
      return ret
    end
  end
  Types[name] = immutable({
    "value",
    "source"
  }, methods)
end
Tree("File", {
  as_lua = function(self, nomsu)
    if #self.value == 1 then
      return self.value[1]:as_lua(nomsu)
    end
    local lua = Lua(self.source)
    for i, line in ipairs(self.value) do
      local line_lua = line:as_lua(nomsu)
      if not line_lua then
        error("No lua produced by " .. tostring(repr(line)), 0)
      end
      if i < #self.value then
        lua:append("\n")
      end
      lua:convert_to_statements()
      lua:append(line_lua)
    end
    lua:declare_locals()
    return lua
  end
})
Tree("Nomsu", {
  as_lua = function(self, nomsu)
    return Lua.Value(self.source, "nomsu:parse(Nomsu(", repr(self.value.source), ", ", repr(tostring(self.value.source:get_text())), ")).value[1]")
  end
})
Tree("Block", {
  as_lua = function(self, nomsu)
    if #self.value == 1 then
      return self.value[1]:as_lua(nomsu)
    end
    local lua = Lua(self.source)
    for i, line in ipairs(self.value) do
      local line_lua = line:as_lua(nomsu)
      if i < #self.value then
        lua:append("\n")
      end
      line_lua:convert_to_statements()
      lua:append(line_lua)
    end
    return lua
  end
})
local math_expression = re.compile([[ "%" (" " [*/^+-] " %")+ ]])
Tree("Action", {
  as_lua = function(self, nomsu)
    local stub = self:get_stub()
    local action = rawget(nomsu.environment.ACTIONS, stub)
    local metadata = nomsu.action_metadata[action]
    if metadata and metadata.compile_time then
      local args
      do
        local _accum_0 = { }
        local _len_0 = 1
        local _list_0 = self.value
        for _index_0 = 1, #_list_0 do
          local arg = _list_0[_index_0]
          if arg.type ~= "Word" then
            _accum_0[_len_0] = arg
            _len_0 = _len_0 + 1
          end
        end
        args = _accum_0
      end
      if metadata.arg_orders then
        local new_args
        do
          local _accum_0 = { }
          local _len_0 = 1
          local _list_0 = metadata.arg_orders[stub]
          for _index_0 = 1, #_list_0 do
            local p = _list_0[_index_0]
            _accum_0[_len_0] = args[p - 1]
            _len_0 = _len_0 + 1
          end
          new_args = _accum_0
        end
        args = new_args
      end
      local ret = action(Lua(self.source), unpack(args))
      return ret
    end
    local lua = Lua.Value(self.source)
    if not metadata and math_expression:match(stub) then
      for i, tok in ipairs(self.value) do
        if tok.type == "Word" then
          lua:append(tok.value)
        else
          local tok_lua = tok:as_lua(nomsu)
          if not (tok_lua.is_value) then
            local src = tok.source:get_text()
            error("non-expression value inside math expression: " .. tostring(colored.yellow(src)))
          end
          lua:append(tok_lua)
        end
        if i < #self.value then
          lua:append(" ")
        end
      end
      lua:parenthesize()
      return lua
    end
    local args = { }
    for i, tok in ipairs(self.value) do
      local _continue_0 = false
      repeat
        if tok.type == "Word" then
          _continue_0 = true
          break
        end
        local arg_lua = tok:as_lua(nomsu)
        if not (arg_lua.is_value) then
          local line, src = tok.source:get_line(), tok.source:get_text()
          error(tostring(line) .. ": Cannot use:\n" .. tostring(colored.yellow(src)) .. "\nas an argument to " .. tostring(stub) .. ", since it's not an expression, it produces: " .. tostring(repr(arg_lua)), 0)
        end
        insert(args, arg_lua)
        _continue_0 = true
      until true
      if not _continue_0 then
        break
      end
    end
    if metadata and metadata.arg_orders then
      do
        local _accum_0 = { }
        local _len_0 = 1
        local _list_0 = metadata.arg_orders[stub]
        for _index_0 = 1, #_list_0 do
          local p = _list_0[_index_0]
          _accum_0[_len_0] = args[p]
          _len_0 = _len_0 + 1
        end
        args = _accum_0
      end
    end
    lua:append("ACTIONS[", repr(stub), "](")
    for i, arg in ipairs(args) do
      lua:append(arg)
      if i < #args then
        lua:append(", ")
      end
    end
    lua:append(")")
    return lua
  end,
  get_stub = function(self, include_names)
    if include_names == nil then
      include_names = false
    end
    local bits
    if include_names then
      do
        local _accum_0 = { }
        local _len_0 = 1
        local _list_0 = self.value
        for _index_0 = 1, #_list_0 do
          local t = _list_0[_index_0]
          _accum_0[_len_0] = (t.type == "Word" and t.value or "%" .. tostring(t.value))
          _len_0 = _len_0 + 1
        end
        bits = _accum_0
      end
    else
      do
        local _accum_0 = { }
        local _len_0 = 1
        local _list_0 = self.value
        for _index_0 = 1, #_list_0 do
          local t = _list_0[_index_0]
          _accum_0[_len_0] = (t.type == "Word" and t.value or "%")
          _len_0 = _len_0 + 1
        end
        bits = _accum_0
      end
    end
    return concat(bits, " ")
  end
})
Tree("Text", {
  as_lua = function(self, nomsu)
    local lua = Lua.Value(self.source)
    local string_buffer = ""
    local _list_0 = self.value
    for _index_0 = 1, #_list_0 do
      local _continue_0 = false
      repeat
        local bit = _list_0[_index_0]
        if type(bit) == "string" then
          string_buffer = string_buffer .. bit
          _continue_0 = true
          break
        end
        if string_buffer ~= "" then
          if #lua.bits > 0 then
            lua:append("..")
          end
          lua:append(repr(string_buffer))
          string_buffer = ""
        end
        local bit_lua = bit:as_lua(nomsu)
        if not (bit_lua.is_value) then
          local line, src = bit.source:get_line(), bit.source:get_text()
          error(tostring(line) .. ": Cannot use " .. tostring(colored.yellow(bit)) .. " as a string interpolation value, since it's not an expression.", 0)
        end
        if #lua.bits > 0 then
          lua:append("..")
        end
        if bit.type ~= "Text" then
          bit_lua = Lua.Value(bit.source, "stringify(", bit_lua, ")")
        end
        lua:append(bit_lua)
        _continue_0 = true
      until true
      if not _continue_0 then
        break
      end
    end
    if string_buffer ~= "" or #lua.bits == 0 then
      if #lua.bits > 0 then
        lua:append("..")
      end
      lua:append(repr(string_buffer))
    end
    if #lua.bits > 1 then
      lua:parenthesize()
    end
    return lua
  end
})
Tree("List", {
  as_lua = function(self, nomsu)
    local lua = Lua.Value(self.source, "{")
    local line_length = 0
    for i, item in ipairs(self.value) do
      local item_lua = item:as_lua(nomsu)
      if not (item_lua.is_value) then
        local line, src = item.source:get_line(), item.source:get_text()
        error(tostring(line) .. ": Cannot use " .. tostring(colored.yellow(src)) .. " as a list item, since it's not an expression.", 0)
      end
      lua:append(item_lua)
      local newlines, last_line = tostring(item_lua):match("^(.-)([^\n]*)$")
      if #newlines > 0 then
        line_length = #last_line
      else
        line_length = line_length + #last_line
      end
      if i < #self.value then
        if line_length >= 80 then
          lua:append(",\n")
          line_length = 0
        else
          lua:append(", ")
          line_length = line_length + 2
        end
      end
    end
    lua:append("}")
    return lua
  end
})
Tree("Dict", {
  as_lua = function(self, nomsu)
    local lua = Lua.Value(self.source, "{")
    local line_length = 0
    for i, entry in ipairs(self.value) do
      local key_lua = entry.key:as_lua(nomsu)
      if not (key_lua.is_value) then
        local line, src = key.source:get_line(), key.source:get_text()
        error(tostring(line) .. ": Cannot use " .. tostring(colored.yellow(src)) .. " as a dict key, since it's not an expression.", 0)
      end
      local value_lua = entry.value:as_lua(nomsu)
      if not (value_lua.is_value) then
        local line, src = value.source:get_line(), value.source:get_text()
        error(tostring(line) .. ": Cannot use " .. tostring(colored.yellow(src)) .. " as a dict value, since it's not an expression.", 0)
      end
      local key_str = tostring(key_lua):match([=[["']([a-zA-Z_][a-zA-Z0-9_]*)['"]]=])
      if key_str then
        lua:append(key_str, "=", value_lua)
      elseif tostring(key_lua):sub(1, 1) == "[" then
        lua:append("[ ", key_lua, "]=", value_lua)
      else
        lua:append("[", key_lua, "]=", value_lua)
      end
      local newlines, last_line = ("[" .. tostring(key_lua) .. "=" .. tostring(value_lua)):match("^(.-)([^\n]*)$")
      if #newlines > 0 then
        line_length = #last_line
      else
        line_length = line_length + #last_line
      end
      if i < #self.value then
        if line_length >= 80 then
          lua:append(",\n")
          line_length = 0
        else
          lua:append(", ")
          line_length = line_length + 2
        end
      end
    end
    lua:append("}")
    return lua
  end
})
Tree("IndexChain", {
  as_lua = function(self, nomsu)
    local lua = self.value[1]:as_lua(nomsu)
    if not (lua.is_value) then
      local line, src = self.value[1].source:get_line(), self.value[1].source:get_text()
      error(tostring(line) .. ": Cannot index " .. tostring(colored.yellow(src)) .. ", since it's not an expression.", 0)
    end
    local first_char = tostring(lua):sub(1, 1)
    if first_char == "{" or first_char == '"' or first_char == "[" then
      lua:parenthesize()
    end
    for i = 2, #self.value do
      local _continue_0 = false
      repeat
        local key = self.value[i]
        if key.type == 'Text' and #key.value == 1 and type(key.value[1]) == 'string' and key.value[1]:match("^[a-zA-Z_][a-zA-Z0-9_]$") then
          lua:append("." .. tostring(key.value[1]))
          _continue_0 = true
          break
        end
        local key_lua = key:as_lua(nomsu)
        if not (key_lua.is_value) then
          local line, src = key.source:get_line(), key.source:get_text()
          error(tostring(line) .. ": Cannot use " .. tostring(colored.yellow(src)) .. " as an index, since it's not an expression.", 0)
        end
        if tostring(key_lua):sub(1, 1) == '[' then
          lua:append("[ ", key_lua, "]")
        else
          lua:append("[", key_lua, "]")
        end
        _continue_0 = true
      until true
      if not _continue_0 then
        break
      end
    end
    return lua
  end
})
Tree("Number", {
  as_lua = function(self, nomsu)
    return Lua.Value(self.source, tostring(self.value))
  end
})
Tree("Var", {
  as_lua = function(self, nomsu)
    local lua_id = "_" .. (self.value:gsub("%W", function(verboten)
      if verboten == "_" then
        return "__"
      else
        return ("_%x"):format(verboten:byte())
      end
    end))
    return Lua.Value(self.source, lua_id)
  end
})
Tree("Word", {
  as_lua = function(self, nomsu)
    return error("Attempt to convert Word to lua")
  end
})
Tree("Comment", {
  as_lua = function(self, nomsu)
    return Lua(self.source, "--" .. self.value:gsub("\n", "\n--") .. "\n")
  end
})
return Types