16 Library introduction [library]

16.4 Library-wide requirements [requirements]

16.4.4 Requirements on types and expressions [utility.requirements]

16.4.4.2 Template argument requirements [utility.arg.requirements]

Table 31: Cpp17CopyConstructible requirements (in addition to Cpp17MoveConstructible) [tab:cpp17.copyconstructible]
Expression
Post-condition
T u = v;
the value of v is unchanged and is equivalent to u
T(v)
the value of v is unchanged and is equivalent to T(v)