英文:
Attempt to index a nil value in premake.lua
问题
我已经为我的C++游戏引擎创建了一个premake.lua文件。但当我运行 premake5.exe vs2017 时，我收到以下错误信息：
Game Engine/premake5.lua:35: 尝试索引一个空值
如果我转到第35行，它抱怨如下：
34 filter "system:windows":
35 cppdialect "C++17"
36 staticruntime "On"
37 systemversion "latest"
我发现，如果我注释掉第34行，似乎可以工作，但然后在第49行上出现相同的错误：
49 filter "configurations:Debug":
50 defines "BZ_DEBUG"
51 symbols "On"
如果我尝试注释掉所有我的筛选字段，我会收到以下错误信息：
Error: [string "return cfg-architecture"]:1: 尝试在一个表值上执行算术运算（全局 'cfg'），在标记: cfg-architecture
我尝试了多个版本的premake，也尝试了使用不同的VS版本编译，但每次都得到相同的结果。
英文:
I have made a premake.lua file for mye C++ Game Engine. But when i run premake5.exe vs2017 i get the error:
Game Engine/premake5.lua:35: attempt to index a nil value
if i go to line 35 where it complaines i see this:
34 filter "system:windows":
35 cppdialect "C++17"
36 staticruntime "On"
37 systemversion "latest"
i found out that if i comment out line 34 it seems to work but then proceedes to giving the same error on line 49:
49 filter "configurations:Debug":
50 defines "BZ_DEBUG"
51 symbols "On"
if i at try to comment out all my filter fields. i get this error:
Error: [string "return cfg-architecture"]:1: attempt to perform arithmetic on a table value (global 'cfg') in token: cfg-architecture
i have tried multiple versions of premake and have tried to compile multiple with different vs versions. But i get the same result every time.
答案1
得分: 2
你在 filter 中的字符串后面多了一个 :，所以你尝试调用 "some_string":cppdialect("C++17")，但字符串没有这个方法。
你的代码应该是：
filter "system:windows"
cppdialect "C++17"
staticruntime "On"
systemversion "latest"
英文:
You have extra : after your string in filter. so you try to call "some_string":cppdialect("C++17") and string doesn't have that method.
Your code should be
filter "system:windows"
cppdialect "C++17"
staticruntime "On"
systemversion "latest"
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