If an explicit deduction guide matches a constructor call, it will always take precedence over an implicitly generated guide. Troubleshooting Common Errors "Failed to deduce template arguments"
Deduction guides serve as "hints" or rules that teach the compiler how to map a specific signature to a class specialization. Implicit Guides: the deduction guide pdf work
The Deduction Guide PDF covers a wide range of deductions, including: If an explicit deduction guide matches a constructor