message: Add sectionid enum
diff: @@ -52,6 +52,22 @@ struct code
  bytes immediates;
  };
  +enum class sectionid : uint8_t
  +{
  + custom = 0,
  + type = 1,
  + import = 2,
  + function = 3,
  + table = 4,
  + memory = 5,
  + global = 6,
  + export_ = 7,
  + start = 8,
  + element = 9,
  + code = 10,
  + data = 11
  +};
  +
  struct module
  {
  // https://webassembly.github.io/spec/core/binary/modules.html#type-section
  