Function addreturn

src/Chain/libraries/glua/lua.cpp:330–342

** Try to compile line on the stack as 'return ;'; on return, stack ** has either compiled chunk or original line (if compilation failed). */

** has either compiled chunk or original line (if compilation failed).
*/
static int addreturn(lua_State *L) {
    const char *line = lua_tostring(L, -1);  /* original line */
    const char *retline = lua_pushfstring(L, "return %s;", line);
    int status = luaL_loadbuffer(L, retline, strlen(retline), "=stdin");
    if (status == LUA_OK) {
        lua_remove(L, -2);  /* remove modified line */
        if (line[0] != '\0')  /* non empty? */
            lua_saveline(L, line);  /* keep history */
    }
    else
        lua_pop(L, 2);  /* pop result from 'luaL_loadbuffer' and modified line */
    return status;
}


/*