lua 오류 처리

번역하다

오류 처리

-- 8   
function loadfileTest()
    f = loadfile("5function.lua")
    print("-------------after loadfile------------")
    f() --  
    print("-------------after dingyi--------------")
    main()
end

--[[  main ， loadfile main 
function main()
    loadfileTest()
    os.exit()
end]]

function errorTest()
    local function _foo(a)
        if not a then
             error{code=1, msg="arg is nil"}
         elseif tostring(type(a)) ~= "number" then
             error{code=2, msg="arg is not number"}
         elseif a%3==0 then
             error{code=3, msg="arg is multiple of 3"}
        end
        io.write(string.format("OK, number a is %d
", a))
        return true, "OK"
        --return false --test assert
    end

    local res = assert(_foo(31), "test assert") --assert 
    --assert(false, "test boolean")
    --pcall ， pcall ， 
    local pcallRes, errorMsg = pcall(_foo, "3") 
    if not pcallRes then
        print(errorMsg.code, errorMsg.msg)
    end

    print("Test xpcall______________________")
    local function debug_(eTable)
        print("debug_ is called")
        print("table from error to debug_:",eTable.code, eTable.msg)
        return {code=-1, msg="xpcall return debug_'s return value"}
    end

    local xpcallRes, _fooRes1, _fooRes2 = xpcall(_foo, debug_, 6)
    if not xpcallRes then
        -- res false， debug_ ， error ， debug_ 
        print("debug_ has been called")
    else
        print("_foo results are ", _fooRes1, _fooRes2)
    end

    os.exit()
end

--loadfileTest()
errorTest()