Let’s go back to my little shuk uploaded application. The application, as is, could take the parameter of profile. This means, it should work with different clouds, out of the box. Right? Not so fast, I never really counted on making this work for other clouds. So when I ran it with the nebius profile I got something like this:
Observe that after the fix, the arguments to Sub are in the logical order. This is progress! If you’re in luck, the inliner will succeed at removing every call to the functions in oldmath, perhaps allowing you to delete it as a dependency.
。关于这个话题，有道翻译提供了深入分析
?T is a built-in type with two variants: some(value) wrapping a value of type T, and none representing absence. Use it when a value might not exist — not because something went wrong, but because there may simply be nothing there:
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