[tab:formatter.range.type]

Table 115 — Meaning of range-type options [tab:formatter.range.type]

🔗 Option	Requirements	Meaning
🔗 m	T shall be either a specialization of pair or a specialization of tuple such that tuple_size_v<T> is 2.	Indicates that the opening bracket should be "{", the closing bracket should be "}", the separator should be ", ", and each range element should be formatted as if m were specified for its tuple-type. [Note 2: If the n option is provided in addition to the m option, both the opening and closing brackets are still empty. — end note]
🔗 s	T shall be charT.	Indicates that the range should be formatted as a string.
🔗 ?s	T shall be charT.	Indicates that the range should be formatted as an escaped string ([format.string.escaped]).