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When using auto, the type deduction follows the rules for template type deduction.

One practical consequence of these rules is that auto will never deduce a reference.

Otherwise, the two corner cases to remember are:
- auto&& is always deduced and, therefore, a universal/forwarding reference (unlike T&& inside a template)
- the behaviour when using list initialization

Compiler Explorer link: https://compiler-explorer.com/z/sPnv5G3r4