Method contextEval

source/core/StarLua.cpp:978–1010

}

LuaDetail::LuaFunctionReturn LuaEngine::contextEval(int handleIndex, String const& lua) {
  int stackSize = lua_gettop(m_state);
  lua_checkstack(m_state, 2);

  // First, try interpreting the lua as an expression by adding "return", then
  // as a statement.  This is the same thing the actual lua repl does.
  int loadRes = luaL_loadstring(m_state, ("return " + lua).utf8Ptr());
  if (loadRes == LUA_ERRSYNTAX) {
    lua_pop(m_state, 1);
    loadRes = luaL_loadstring(m_state, lua.utf8Ptr());
  }
  handleError(m_state, loadRes);

  pushHandle(m_state, handleIndex);
  lua_setupvalue(m_state, -2, 1);

  incrementRecursionLevel();
  int callRes = pcallWithTraceback(m_state, 0, LUA_MULTRET);
  decrementRecursionLevel();
  handleError(m_state, callRes);

  int returnValues = lua_gettop(m_state) - stackSize;
  if (returnValues == 0) {
    return LuaDetail::LuaFunctionReturn();
  } else if (returnValues == 1) {
    return LuaDetail::LuaFunctionReturn(popLuaValue(m_state));
  } else {
    LuaVariadic<LuaValue> ret(returnValues);
    for (int i = returnValues - 1; i >= 0; --i)
      ret[i] = popLuaValue(m_state);
    return LuaDetail::LuaFunctionReturn(ret);
  }
}

LuaValue LuaEngine::contextGetPath(int handleIndex, String path) {
  lua_checkstack(m_state, 2);