1\version "2.21.80"
2
3\header {
4  texidoc = "The Scheme function @code{ly:version?} checks that the version of
5LilyPond being used satisfies a comparison predicate against a given version."
6}
7
8#(if (not (ly:version? = (ly:version)))
9  (ly:error "Broken regression test: ly:version? says the current version is
10not equal to itself: ~a." (ly:version)))
11
12#(if (not (ly:version? > '(2 20)))
13  (ly:error "Broken regression test: ly:version? incorrectly compares versions
14of different lengths: ~a and ~a." (ly:version) '(2 20)))
15