Add NoDiscard attributes

[Baptouuuu]

Fix #13

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.24%. Comparing base (a4fbeef) to head (b570827).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop      #15   +/-   ##
==========================================
  Coverage      99.24%   99.24%           
  Complexity        54       54           
==========================================
  Files             11       11           
  Lines            528      528           
==========================================
  Hits             524      524           
  Misses             4        4           

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