diff --git a/tools/dump_cinit.lua b/tools/dump_cinit.lua
deleted file mode 100644
index 34d6ac6297..0000000000
--- a/tools/dump_cinit.lua
+++ /dev/null
@@ -1,751 +0,0 @@
---[[
-
-  Routines for dumping internal data structures into C initializers
-  that can be compiled into a .o file.
-
---]]
-
-local upbtable = require "upb.table"
-local upb = require "upb"
-local export = {}
-
--- A tiny little abstraction that decouples the dump_* functions from
--- what they're writing to (appending to a string, writing to file I/O, etc).
--- This could possibly matter since naive string building is O(n^2) in the
--- number of appends.
-function export.str_appender()
-  local str = ""
-  local function append(fmt, ...)
-    str = str .. string.format(fmt, ...)
-  end
-  local function get()
-    return str
-  end
-  return append, get
-end
-
-function export.file_appender(file)
-  local f = file
-  local function append(fmt, ...)
-    f:write(string.format(fmt, ...))
-  end
-  return append
-end
-
-function handler_types(base)
-  local ret = {}
-  for k, _ in pairs(base) do
-    if string.find(k, "^" .. "HANDLER_") then
-      ret[#ret + 1] = k
-    end
-  end
-  return ret
-end
-
-function octchar(num)
-  assert(num < 8)
-  local idx = num + 1  -- 1-based index
-  return string.sub("01234567", idx, idx)
-end
-
-function c_escape(num)
-  assert(num < 256)
-  return string.format("\\%s%s%s",
-                       octchar(math.floor(num / 64)),
-                       octchar(math.floor(num / 8) % 8),
-                       octchar(num % 8));
-end
-
--- const(f, label) -> UPB_LABEL_REPEATED, where f:label() == upb.LABEL_REPEATED
-function const(obj, name, base)
-  local val = obj[name]
-  base = base or upb
-
-  -- Support both f:label() and f.label.
-  if type(val) == "function" then
-    val = val(obj)
-  end
-
-  for k, v in pairs(base) do
-    if v == val and string.find(k, "^" .. string.upper(name)) then
-      return "UPB_" .. k
-    end
-  end
-  assert(false, "Couldn't find UPB_" .. string.upper(name) ..
-                " constant for value: " .. val)
-end
-
-function sortedkeys(tab)
-  arr = {}
-  for key in pairs(tab) do
-    arr[#arr + 1] = key
-  end
-  table.sort(arr)
-  return arr
-end
-
-function sorted_defs(defs)
-  local sorted = {}
-
-  for def in defs do
-    if def.type == deftype then
-      sorted[#sorted + 1] = def
-    end
-  end
-
-  table.sort(sorted,
-             function(a, b) return a:full_name() < b:full_name() end)
-
-  return sorted
-end
-
-function constlist(pattern)
-  local ret = {}
-  for k, v in pairs(upb) do
-    if string.find(k, "^" .. pattern) then
-      ret[k] = v
-    end
-  end
-  return ret
-end
-
-function boolstr(val)
-  if val == true then
-    return "true"
-  elseif val == false then
-    return "false"
-  else
-    assert(false, "Bad bool value: " .. tostring(val))
-  end
-end
-
---[[
-
-  LinkTable: an object that tracks all linkable objects and their offsets to
-  facilitate linking.
-
---]]
-
-local LinkTable = {}
-function LinkTable:new(types)
-  local linktab = {
-    types = types,
-    table = {},  -- ptr -> {type, 0-based offset}
-    obj_arrays = {}  -- Establishes the ordering for each object type
-  }
-  for type, _ in pairs(types) do
-    linktab.obj_arrays[type] = {}
-  end
-  setmetatable(linktab, {__index = LinkTable})  -- Inheritance
-  return linktab
-end
-
--- Adds a new object to the sequence of objects of this type.
-function LinkTable:add(objtype, ptr, obj)
-  obj = obj or ptr
-  assert(self.table[obj] == nil)
-  assert(self.types[objtype])
-  local arr = self.obj_arrays[objtype]
-  self.table[ptr] = {objtype, #arr}
-  arr[#arr + 1] = obj
-end
-
--- Returns a C symbol name for the given objtype and offset.
-function LinkTable:csym(objtype, offset)
-  local typestr = assert(self.types[objtype])
-  return string.format("%s[%d]", typestr, offset)
-end
-
--- Returns the address of the given C object.
-function LinkTable:addr(obj)
-  if obj == upbtable.NULL then
-    return "NULL"
-  else
-    local tabent = assert(self.table[obj], "unknown object: " .. tostring(obj))
-    return "&" .. self:csym(tabent[1], tabent[2])
-  end
-end
-
--- Returns an array declarator indicating how many objects have been added.
-function LinkTable:cdecl(objtype)
-  return self:csym(objtype, #self.obj_arrays[objtype])
-end
-
-function LinkTable:objs(objtype)
-  -- Return iterator function, allowing use as:
-  --   for obj in linktable:objs(type) do
-  --     -- ...
-  --   done
-  local array = self.obj_arrays[objtype]
-  local i = 0
-  return function()
-    i = i + 1
-    if array[i] then return array[i] end
-  end
-end
-
-function LinkTable:empty(objtype)
-  return #self.obj_arrays[objtype] == 0
-end
-
---[[
-
-  Dumper: an object that can dump C initializers for several constructs.
-  Uses a LinkTable to resolve references when necessary.
-
---]]
-
-local Dumper = {}
-function Dumper:new(linktab)
-  local obj = {linktab = linktab}
-  setmetatable(obj, {__index = Dumper})  -- Inheritance
-  return obj
-end
-
--- Dumps a upb_tabval, eg:
---   UPB_TABVALUE_INIT(5)
-function Dumper:_value(val, upbtype)
-  if type(val) == "nil" then
-    return "UPB_TABVALUE_EMPTY_INIT"
-  elseif type(val) == "number" then
-    -- Use upbtype to disambiguate what kind of number it is.
-    if upbtype == upbtable.CTYPE_INT32 then
-      return string.format("UPB_TABVALUE_INT_INIT(%d)", val)
-    else
-      -- TODO(haberman): add support for these so we can properly support
-      -- default values.
-      error("Unsupported number type " .. upbtype)
-    end
-  elseif type(val) == "string" then
-    return string.format('UPB_TABVALUE_PTR_INIT("%s")', val)
-  else
-    -- We take this as an object reference that has an entry in the link table.
-    return string.format("UPB_TABVALUE_PTR_INIT(%s)", self.linktab:addr(val))
-  end
-end
-
--- Dumps a table key.
-function Dumper:tabkey(key)
-  if type(key) == "nil" then
-    return "UPB_TABKEY_NONE"
-  elseif type(key) == "string" then
-    local len = #key
-    local len1 = c_escape(len % 256)
-    local len2 = c_escape(math.floor(len / 256) % 256)
-    local len3 = c_escape(math.floor(len / (256 * 256)) % 256)
-    local len4 = c_escape(math.floor(len / (256 * 256 * 256)) % 256)
-    return string.format('UPB_TABKEY_STR("%s", "%s", "%s", "%s", "%s")',
-                         len1, len2, len3, len4, key)
-  else
-    return string.format("UPB_TABKEY_NUM(%d)", key)
-  end
-end
-
--- Dumps a table entry.
-function Dumper:tabent(ent)
-  local key = self:tabkey(ent.key)
-  local val = self:_value(ent.value, ent.valtype)
-  local next = self.linktab:addr(ent.next)
-  return string.format('  {%s, %s, %s},\n', key, val, next)
-end
-
--- Dumps an inttable array entry.  This is almost the same as value() above,
--- except that nil values have a special value to indicate "empty".
-function Dumper:arrayval(val)
-  if val.val then
-    return string.format("  %s,\n", self:_value(val.val, val.valtype))
-  else
-    return "  UPB_TABVALUE_EMPTY_INIT,\n"
-  end
-end
-
--- Dumps an initializer for the given strtable/inttable (respectively).  Its
--- entries must have previously been added to the linktable.
-function Dumper:strtable(t)
-  -- UPB_STRTABLE_INIT(count, mask, type, size_lg2, entries)
-  return string.format(
-      "UPB_STRTABLE_INIT(%d, %d, %s, %d, %s)",
-      t.count, t.mask, const(t, "ctype", upbtable) , t.size_lg2,
-      self.linktab:addr(t.entries[1].ptr))
-end
-
-function Dumper:inttable(t)
-  local lt = assert(self.linktab)
-  -- UPB_INTTABLE_INIT(count, mask, type, size_lg2, ent, a, asize, acount)
-  local entries = "NULL"
-  if #t.entries > 0 then
-    entries = lt:addr(t.entries[1].ptr)
-  end
-  return string.format(
-      "UPB_INTTABLE_INIT(%d, %d, %s, %d, %s, %s, %d, %d)",
-      t.count, t.mask, const(t, "ctype", upbtable), t.size_lg2, entries,
-      lt:addr(t.array[1].ptr), t.array_size, t.array_count)
-end
-
--- A visitor for visiting all tables of a def.  Used first to count entries
--- and later to dump them.
-local function gettables(def)
-  if def:def_type() == upb.DEF_MSG then
-    return {int = upbtable.msgdef_itof(def), str = upbtable.msgdef_ntof(def)}
-  elseif def:def_type() == upb.DEF_ENUM then
-    return {int = upbtable.enumdef_iton(def), str = upbtable.enumdef_ntoi(def)}
-  end
-end
-
-local function emit_file_warning(filedef, append)
-  append('/* This file was generated by upbc (the upb compiler) from the input\n')
-  append(' * file:\n')
-  append(' *\n')
-  append(' *     %s\n', filedef:name())
-  append(' *\n')
-  append(' * Do not edit -- your changes will be discarded when the file is\n')
-  append(' * regenerated. */\n\n')
-end
-
-local function join(...)
-  return table.concat({...}, ".")
-end
-
-local function split(str)
-  local ret = {}
-  for word in string.gmatch(str, "%w+") do
-    table.insert(ret, word)
-  end
-  return ret
-end
-
-local function to_cident(...)
-  return string.gsub(join(...), "[%./]", "_")
-end
-
-local function to_preproc(...)
-  return string.upper(to_cident(...))
-end
-
--- Strips away last path element, ie:
---   foo.Bar.Baz -> foo.Bar
-local function remove_name(name)
-  local package_end = 0
-  for i=1,string.len(name) do
-    if string.byte(name, i) == string.byte(".", 1) then
-      package_end = i - 1
-    end
-  end
-  return string.sub(name, 1, package_end)
-end
-
-local function start_namespace(package, append)
-  local package_components = split(package)
-  for _, component in ipairs(package_components) do
-    append("namespace %s {\n", component)
-  end
-end
-
-local function end_namespace(package, append)
-  local package_components = split(package)
-  for i=#package_components,1,-1 do
-    append("}  /* namespace %s */\n", package_components[i])
-  end
-end
-
-local function well_known_type(m)
-  local type_map = {}
-  type_map["google.protobuf.Any"]         = "UPB_WELLKNOWN_ANY"
-  type_map["google.protobuf.FieldMask"]   = "UPB_WELLKNOWN_FIELDMASK"
-  type_map["google.protobuf.Duration"]    = "UPB_WELLKNOWN_DURATION"
-  type_map["google.protobuf.Timestamp"]   = "UPB_WELLKNOWN_TIMESTAMP"
-  type_map["google.protobuf.Value"]       = "UPB_WELLKNOWN_VALUE"
-  type_map["google.protobuf.ListValue"]   = "UPB_WELLKNOWN_LISTVALUE"
-  type_map["google.protobuf.Struct"]      = "UPB_WELLKNOWN_STRUCT"
-  type_map["google.protobuf.DoubleValue"] = "UPB_WELLKNOWN_DOUBLEVALUE"
-  type_map["google.protobuf.FloatValue"]  = "UPB_WELLKNOWN_FLOATVALUE"
-  type_map["google.protobuf.Int64Value"]  = "UPB_WELLKNOWN_INT64VALUE"
-  type_map["google.protobuf.UInt64Value"] = "UPB_WELLKNOWN_UINT64VALUE"
-  type_map["google.protobuf.Int32Value"]  = "UPB_WELLKNOWN_INT32VALUE"
-  type_map["google.protobuf.UInt32Value"] = "UPB_WELLKNOWN_UINT32VALUE"
-  type_map["google.protobuf.BoolValue"]   = "UPB_WELLKNOWN_BOOLVALUE"
-  type_map["google.protobuf.StringValue"] = "UPB_WELLKNOWN_STRINGVALUE"
-  type_map["google.protobuf.BytesValue"]  = "UPB_WELLKNOWN_BYTESVALUE"
-  local t = type_map[m:full_name()]
-  if (t == nil) then
-    t = "UPB_WELLKNOWN_UNSPECIFIED"
-  end
-  return t
-end
-
---[[
-
-  Top-level, exported dumper functions
-
---]]
-
-local function dump_defs_c(filedef, append)
-  local defs = {}
-  for def in filedef:defs(upb.DEF_ANY) do
-    defs[#defs + 1] = def
-    if (def:def_type() == upb.DEF_MSG) then
-      for field in def:fields() do
-        defs[#defs + 1] = field
-      end
-    end
-  end
-
-  -- Sort all defs by (type, name).
-  -- This gives us a linear ordering that we can use to create offsets into
-  -- shared arrays like REFTABLES, hash table entries, and arrays.
-  table.sort(defs, function(a, b)
-    if a:def_type() ~= b:def_type() then
-      return a:def_type() < b:def_type()
-    else
-      return a:full_name() < b:full_name() end
-    end
-  )
-
-  -- Perform pre-pass to build the link table.
-  local linktab = LinkTable:new{
-    [upb.DEF_MSG] = "msgs",
-    [upb.DEF_FIELD] = "fields",
-    [upb.DEF_ENUM] = "enums",
-    intentries = "intentries",
-    strentries = "strentries",
-    arrays = "arrays",
-  }
-  local reftable_count = 0
-
-  for _, def in ipairs(defs) do
-    assert(def:is_frozen(), "can only dump frozen defs.")
-    linktab:add(def:def_type(), def)
-    reftable_count = reftable_count + 2
-    local tables = gettables(def)
-    if tables then
-      for _, e in ipairs(tables.str.entries) do
-        linktab:add("strentries", e.ptr, e)
-      end
-      for _, e in ipairs(tables.int.entries) do
-        linktab:add("intentries", e.ptr, e)
-      end
-      for _, e in ipairs(tables.int.array) do
-        linktab:add("arrays", e.ptr, e)
-      end
-    end
-  end
-
-  -- Emit forward declarations.
-  emit_file_warning(filedef, append)
-  append('#include "upb/def.h"\n')
-  append('#include "upb/structdefs.int.h"\n\n')
-  append("static const upb_msgdef %s;\n", linktab:cdecl(upb.DEF_MSG))
-  append("static const upb_fielddef %s;\n", linktab:cdecl(upb.DEF_FIELD))
-  if not linktab:empty(upb.DEF_ENUM) then
-    append("static const upb_enumdef %s;\n", linktab:cdecl(upb.DEF_ENUM))
-  end
-  append("static const upb_tabent %s;\n", linktab:cdecl("strentries"))
-  if not linktab:empty("intentries") then
-    append("static const upb_tabent %s;\n", linktab:cdecl("intentries"))
-  end
-  append("static const upb_tabval %s;\n", linktab:cdecl("arrays"))
-  append("\n")
-  append("#ifdef UPB_DEBUG_REFS\n")
-  append("static upb_inttable reftables[%d];\n", reftable_count)
-  append("#endif\n")
-  append("\n")
-
-  -- Emit defs.
-  local dumper = Dumper:new(linktab)
-
-  local reftable = 0
-
-  append("static const upb_msgdef %s = {\n", linktab:cdecl(upb.DEF_MSG))
-  for m in linktab:objs(upb.DEF_MSG) do
-    local tables = gettables(m)
-    -- UPB_MSGDEF_INIT(name, selector_count, submsg_field_count, itof, ntof,
-    --                 refs, ref2s)
-    append('  UPB_MSGDEF_INIT("%s", %d, %d, %s, %s, %s, %s, %s,' ..
-           ' &reftables[%d], &reftables[%d]),\n',
-           m:full_name(),
-           upbtable.msgdef_selector_count(m),
-           upbtable.msgdef_submsg_field_count(m),
-           dumper:inttable(tables.int),
-           dumper:strtable(tables.str),
-           boolstr(m:_map_entry()),
-           const(m, "syntax"),
-           well_known_type(m),
-           reftable, reftable + 1)
-    reftable = reftable + 2
-  end
-  append("};\n\n")
-
-  append("static const upb_fielddef %s = {\n", linktab:cdecl(upb.DEF_FIELD))
-  for f in linktab:objs(upb.DEF_FIELD) do
-    local subdef = "NULL"
-    if f:has_subdef() then
-      subdef = string.format("(const upb_def*)(%s)", linktab:addr(f:subdef()))
-    end
-    local intfmt
-    if f:type() == upb.TYPE_UINT32 or
-       f:type() == upb.TYPE_INT32 or
-       f:type() == upb.TYPE_UINT64 or
-       f:type() == upb.TYPE_INT64 then
-      intfmt = const(f, "intfmt")
-    else
-      intfmt = "0"
-    end
-    -- UPB_FIELDDEF_INIT(label, type, intfmt, tagdelim, is_extension, lazy,
-    --                   packed, name, num, msgdef, subdef, selector_base,
-    --                   index, --                   default_value)
-    append('  UPB_FIELDDEF_INIT(%s, %s, %s, %s, %s, %s, %s, "%s", %d, %s, ' ..
-           '%s, %d, %d, {0},' .. -- TODO: support default value
-           '&reftables[%d], &reftables[%d]),\n',
-           const(f, "label"), const(f, "type"), intfmt,
-           boolstr(f:istagdelim()), boolstr(f:is_extension()),
-           boolstr(f:lazy()), boolstr(f:packed()), f:name(), f:number(),
-           linktab:addr(f:containing_type()), subdef,
-           upbtable.fielddef_selector_base(f), f:index(),
-           reftable, reftable + 1
-           )
-    reftable = reftable + 2
-  end
-  append("};\n\n")
-
-  if not linktab:empty(upb.DEF_ENUM) then
-    append("static const upb_enumdef %s = {\n", linktab:cdecl(upb.DEF_ENUM))
-    for e in linktab:objs(upb.DEF_ENUM) do
-      local tables = gettables(e)
-      -- UPB_ENUMDEF_INIT(name, ntoi, iton, defaultval)
-      append('  UPB_ENUMDEF_INIT("%s", %s, %s, %d, ' ..
-             '&reftables[%d], &reftables[%d]),\n',
-             e:full_name(),
-             dumper:strtable(tables.str),
-             dumper:inttable(tables.int),
-             --e:default())
-             0,
-             reftable, reftable + 1)
-      reftable = reftable + 2
-    end
-    append("};\n\n")
-  end
-
-  append("static const upb_tabent %s = {\n", linktab:cdecl("strentries"))
-  for ent in linktab:objs("strentries") do
-    append(dumper:tabent(ent))
-  end
-  append("};\n\n");
-
-  if not linktab:empty("intentries") then
-    append("static const upb_tabent %s = {\n", linktab:cdecl("intentries"))
-    for ent in linktab:objs("intentries") do
-      append(dumper:tabent(ent))
-    end
-    append("};\n\n");
-  end
-
-  append("static const upb_tabval %s = {\n", linktab:cdecl("arrays"))
-  for ent in linktab:objs("arrays") do
-    append(dumper:arrayval(ent))
-  end
-  append("};\n\n");
-
-  append("#ifdef UPB_DEBUG_REFS\n")
-  append("static upb_inttable reftables[%d] = {\n", reftable_count)
-  for i = 1,reftable_count do
-    append("  UPB_EMPTY_INTTABLE_INIT(UPB_CTYPE_PTR),\n")
-  end
-  append("};\n")
-  append("#endif\n\n")
-
-  append("static const upb_msgdef *refm(const upb_msgdef *m, const void *owner) {\n")
-  append("  upb_msgdef_ref(m, owner);\n")
-  append("  return m;\n")
-  append("}\n\n")
-  append("static const upb_enumdef *refe(const upb_enumdef *e, const void *owner) {\n")
-  append("  upb_enumdef_ref(e, owner);\n")
-  append("  return e;\n")
-  append("}\n\n")
-
-  append("/* Public API. */\n")
-
-  for m in linktab:objs(upb.DEF_MSG) do
-    append("const upb_msgdef *upbdefs_%s_get(const void *owner)" ..
-           " { return refm(%s, owner); }\n",
-           to_cident(m:full_name()), linktab:addr(m))
-  end
-
-  append("\n")
-
-  for e in linktab:objs(upb.DEF_ENUM) do
-    append("const upb_enumdef *upbdefs_%s_get(const void *owner)" ..
-           " { return refe(%s, owner); }\n",
-           to_cident(e:full_name()), linktab:addr(e))
-  end
-
-  return linktab
-end
-
-local function dump_defs_for_type(format, defs, append)
-  local sorted = sorted_defs(defs)
-  for _, def in ipairs(sorted) do
-    append(format, to_cident(def:full_name()), def:full_name())
-  end
-
-  append("\n")
-end
-
-local function make_children_map(file)
-  -- Maps file:package() or msg:full_name() -> children.
-  local map = {}
-  for def in file:defs(upb.DEF_ANY) do
-    local container = remove_name(def:full_name())
-    if not map[container] then
-      map[container] = {}
-    end
-    table.insert(map[container], def)
-  end
-
-  -- Sort all the lists for a consistent ordering.
-  for name, children in pairs(map) do
-    table.sort(children, function(a, b) return a:name() < b:name() end)
-  end
-
-  return map
-end
-
-local print_classes
-
-local function print_message(def, map, indent, append)
-  append("\n")
-  append("%sclass %s : public ::upb::reffed_ptr<const ::upb::MessageDef> {\n",
-         indent, def:name())
-  append("%s public:\n", indent)
-  append("%s  %s(const ::upb::MessageDef* m, const void *ref_donor = NULL)\n",
-         indent, def:name())
-  append("%s      : reffed_ptr(m, ref_donor) {\n", indent)
-  append("%s    UPB_ASSERT(upbdefs_%s_is(m));\n", indent, to_cident(def:full_name()))
-  append("%s  }\n", indent)
-  append("\n")
-  append("%s  static %s get() {\n", indent, def:name())
-  append("%s    const ::upb::MessageDef* m = upbdefs_%s_get(&m);\n", indent, to_cident(def:full_name()))
-  append("%s    return %s(m, &m);\n", indent, def:name())
-  append("%s  }\n", indent)
-  -- TODO(haberman): add fields
-  print_classes(def:full_name(), map, indent .. "  ", append)
-  append("%s};\n", indent)
-end
-
-local function print_enum(def, indent, append)
-  append("\n")
-  append("%sclass %s : public ::upb::reffed_ptr<const ::upb::EnumDef> {\n",
-         indent, def:name())
-  append("%s public:\n", indent)
-  append("%s  %s(const ::upb::EnumDef* e, const void *ref_donor = NULL)\n",
-         indent, def:name())
-  append("%s      : reffed_ptr(e, ref_donor) {\n", indent)
-  append("%s    UPB_ASSERT(upbdefs_%s_is(e));\n", indent, to_cident(def:full_name()))
-  append("%s  }\n", indent)
-  append("%s  static %s get() {\n", indent, def:name())
-  append("%s    const ::upb::EnumDef* e = upbdefs_%s_get(&e);\n", indent, to_cident(def:full_name()))
-  append("%s    return %s(e, &e);\n", indent, def:name())
-  append("%s  }\n", indent)
-  append("%s};\n", indent)
-end
-
-function print_classes(name, map, indent, append)
-  if not map[name] then
-    return
-  end
-
-  for _, def in ipairs(map[name]) do
-    if def:def_type() == upb.DEF_MSG then
-      print_message(def, map, indent, append)
-    elseif def:def_type() == upb.DEF_ENUM then
-      print_enum(def, indent, append)
-    else
-      error("Unknown def type for " .. def:full_name())
-    end
-  end
-end
-
-local function dump_defs_h(file, append, linktab)
-  local basename_preproc = to_preproc(file:name())
-  append("/* This file contains accessors for a set of compiled-in defs.\n")
-  append(" * Note that unlike Google's protobuf, it does *not* define\n")
-  append(" * generated classes or any other kind of data structure for\n")
-  append(" * actually storing protobufs.  It only contains *defs* which\n")
-  append(" * let you reflect over a protobuf *schema*.\n")
-  append(" */\n")
-  emit_file_warning(file, append)
-  append('#ifndef %s_UPB_H_\n', basename_preproc)
-  append('#define %s_UPB_H_\n\n', basename_preproc)
-  append('#include "upb/def.h"\n\n')
-  append('UPB_BEGIN_EXTERN_C\n\n')
-
-  -- Dump C enums for proto enums.
-
-  append("/* MessageDefs: call these functions to get a ref to a msgdef. */\n")
-  dump_defs_for_type(
-      "const upb_msgdef *upbdefs_%s_get(const void *owner);\n",
-      file:defs(upb.DEF_MSG), append)
-
-  append("/* EnumDefs: call these functions to get a ref to an enumdef. */\n")
-  dump_defs_for_type(
-      "const upb_enumdef *upbdefs_%s_get(const void *owner);\n",
-      file:defs(upb.DEF_ENUM), append)
-
-  append("/* Functions to test whether this message is of a certain type. */\n")
-  dump_defs_for_type(
-      "UPB_INLINE bool upbdefs_%s_is(const upb_msgdef *m) {\n" ..
-      "  return strcmp(upb_msgdef_fullname(m), \"%s\") == 0;\n}\n",
-      file:defs(upb.DEF_MSG), append)
-
-  append("/* Functions to test whether this enum is of a certain type. */\n")
-  dump_defs_for_type(
-      "UPB_INLINE bool upbdefs_%s_is(const upb_enumdef *e) {\n" ..
-      "  return strcmp(upb_enumdef_fullname(e), \"%s\") == 0;\n}\n",
-      file:defs(upb.DEF_ENUM), append)
-
-  append("\n")
-
-  -- fields
-  local fields = {}
-
-  for f in linktab:objs(upb.DEF_FIELD) do
-    local symname = f:containing_type():full_name() .. "." .. f:name()
-    fields[#fields + 1] = {to_cident(symname), f}
-  end
-
-  table.sort(fields, function(a, b) return a[1] < b[1] end)
-
-  append("/* Functions to get a fielddef from a msgdef reference. */\n")
-  for _, field in ipairs(fields) do
-    local f = field[2]
-    local msg_cident = to_cident(f:containing_type():full_name())
-    local field_cident = to_cident(f:name())
-    append("UPB_INLINE const upb_fielddef *upbdefs_%s_f_%s(const upb_msgdef *m) {" ..
-           " UPB_ASSERT(upbdefs_%s_is(m));" ..
-           " return upb_msgdef_itof(m, %d); }\n",
-           msg_cident, field_cident, msg_cident, f:number())
-  end
-
-  append('\nUPB_END_EXTERN_C\n\n')
-
-  -- C++ wrappers.
-  local children_map = make_children_map(file)
-
-  append("#ifdef __cplusplus\n\n")
-  append("namespace upbdefs {\n")
-  start_namespace(file:package(), append)
-  print_classes(file:package(), children_map, "", append)
-  append("\n")
-  end_namespace(file:package(), append)
-  append("}  /* namespace upbdefs */\n\n")
-  append("#endif  /* __cplusplus */\n")
-
-  append("\n")
-  append('#endif  /* %s_UPB_H_ */\n', basename_preproc)
-end
-
-function export.dump_defs(filedef, append_h, append_c)
-  local linktab = dump_defs_c(filedef, append_c)
-  dump_defs_h(filedef, append_h, linktab)
-end
-
-return export