Version.Info

Evaluates to version information of S if S is a versioned struct:

- exists: true if S is a versioned struct or false if S is a struct without version or not a struct. If false the other constants are not defined. - number: The value of the struct version (S.Info), expected to be of type Type. - next/prev: Info for S.StructNext or S.StructPrev, respectively - type : type of struct this info belongs to

next/prev are recursive instances of this template so they can be checked for existence by Info!(S).next.exists If that's true the next version number is Info!(S).next.number. The next version itself can contain a next version, use Info!(S).next.next.exists to check it out.

struct Version

template Info (

) {

static if(is(S == struct) && is(typeof(S.StructVersion) V))

enum exists;

static if(is(S == struct) && is(typeof(S.StructVersion) V))

enum number;

alias type = S;

alias next = Info!(S.StructNext);

alias next = MissingVersion;

alias prev = Info!(S.StructPrevious);

alias prev = MissingVersion;