Quick A: For source-level library versioning.
A StackOverflow classic:
What are inline namespaces for?
inline namespaces, all members of which are also automatically in the enclosing namespace. I cannot think of any useful application of this -- can somebody please give a brief, succinct example of a situation where an
inline namespaceis needed and where it is the most idiomatic solution?
(Also, it is not clear to me what happens when a
namespaceis declared inline in one but not all declarations, which may live in different files. Isn't this begging for trouble?)
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