constness must also occur in header file
tree36c1769d2cc99d8e6ec0a82347ee3b06cdd1522f
-rw-r--r-- 439 .gitignore
-rw-r--r-- 530 CMakeLists.txt
-rw-r--r-- 1069 LICENSE
-rw-r--r-- 601 README.md
drwxr-xr-x - doc
drwxr-xr-x - lib
drwxr-xr-x - src
drwxr-xr-x - test