Module macros

Macros to construct statically known values.

Macros

• date
  Construct a Date with a statically known value.
• datetime
  Construct a PrimitiveDateTime or OffsetDateTime with a statically known value.
• format_description
  Equivalent of performing format_description::parse() at compile time.
• offset
  Construct a UtcOffset with a statically known value.
• time
  Construct a Time with a statically known value.