generator/enums.lua

   1 module("enums", package.seeall)
   2
   3 local print_enum = fprint(assert(io.open(module_name.._src..module_name..'_enum.cpp', 'w')))
   4
   5 local function filter(enum)
   6         local n = enum.xarg.name
   7         if n~=string.lower(n) and not string.match(n, '_') then
   8                 return false
   9         end
  10         return true
  11 end
  12
  13 local enum_list = {}
  14
  15 local function copy_enums(index)
  16         for e in pairs(index) do
  17                 if e.label=='Enum'
  18                         and not string.match(e.xarg.fullname, '%b<>') then
  19                         if e.xarg.access=='public' and not filter(e) then
  20                                 enum_list[e.xarg.fullname] = e
  21                         elseif e.xarg.access == 'protected' then
  22                                 -- register it anyway
  23                                 enum_list[e.xarg.fullname] = e
  24                                 local c = fullnames[e.xarg.context]
  25                                 assert(type(c) == "table" and c.label == "Class", "cannot find parent of enum "..e.xarg.fullname)
  26                                 if not c.protected_enums then c.protected_enums = {} end
  27                                 table.insert(c.protected_enums, e)
  28                         end
  29                 end
  30         end
  31 end
  32
  33 local function fill_enum_values()
  34         for _,e in pairs(enum_list) do
  35                 local values = {}
  36                 for _, v in ipairs(e) do
  37                         if v.label=='Enumerator' then
  38                                 table.insert(values, v)
  39                         end
  40                 end
  41                 e.values = values
  42         end
  43 end
  44
  45 function fill_enum_tables()
  46         for _,e in pairs(enum_list) do
  47                 local table = 'lqt_Enum lqt_enum'..e.xarg.id..'[] = {\n'
  48                 for _,v in pairs(e.values) do
  49                         table = table .. '  { "' .. v.xarg.name
  50                                 .. '", static_cast<int>('..v.xarg.fullname..') },\n'
  51                 end
  52                 table = table .. '  { 0, 0 }\n'
  53                 table = table .. '};\n'
  54                 e.enum_table = table
  55         end
  56 end
  57
  58 function fill_typesystem(types)
  59         local etype = function(en)
  60                 return {
  61                         push = function(n)
  62                                 return 'lqtL_pushenum(L, '..n..', "'..string.gsub(en, '::', '.')..'")', 1
  63                         end,
  64                         get = function(n)
  65                                 return 'static_cast<'..en..'>'
  66                                 ..'(lqtL_toenum(L, '..n..', "'..string.gsub(en, '::', '.')..'"))', 1
  67                         end,
  68                         test = function(n)
  69                                 return 'lqtL_isenum(L, '..n..', "'..string.gsub(en, '::', '.')..'")', 1
  70                         end,
  71                         onstack = string.gsub(en, '::', '.')..',',
  72                 }
  73         end
  74         for _,e in pairs(enum_list) do
  75                 if not types[e.xarg.fullname] then
  76                         types[e.xarg.fullname] = etype(e.xarg.fullname)
  77                 else
  78                         --io.stderr:write(e.xarg.fullname, ': already present\n')
  79                 end
  80         end
  81 end
  82
  83
  84 function print_enum_tables()
  85         for _,e in pairs(enum_list) do
  86                 if e.xarg.access == 'public' then print_enum('static ' .. e.enum_table) end
  87         end
  88         return enums
  89 end
  90
  91 function print_enum_creator(mod)
  92         local out = 'static lqt_Enumlist lqt_enum_list[] = {\n'
  93         for _,e in pairs(enum_list) do
  94                 if e.xarg.access == 'public' then
  95                         out = out..'  { lqt_enum'..e.xarg.id..', "'..string.gsub(e.xarg.fullname, "::", ".")..'" },\n'
  96                 end
  97         end
  98         out = out..'  { 0, 0 },\n};\n'
  99         out = out .. 'void lqt_create_enums_'..mod..' (lua_State *L) {\n'
 100         out = out .. '  lqtL_createenumlist(L, lqt_enum_list);  return;\n}\n'
 101         print_enum(out)
 102 end
 103
 104 ---------------------------------------------------------------------
 105
 106 function preprocess(index)
 107         copy_enums(index)
 108 end
 109
 110 function process(index, types)
 111         fill_enum_values()
 112         fill_enum_tables()
 113         fill_typesystem(types)
 114 end
 115
 116 function output()
 117         print_enum(output_includes)
 118         print_enum_tables()
 119         print_enum_creator(module_name)
 120 end