add accumulate() function for completeness

4 jobs for ducc0 in 12 minutes and 59 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build Docker
passed #1096928
build_docker

00:00:17

 
  Testing
passed #1096930
test_clang

00:11:50

passed #1096929
test_gcc

00:12:26

 
  Build Tarballs
passed #1096931
release

00:00:15