Add integer sqrt function

[mborland]

Closes: #51

[cppalliance-bot]

An automated preview of the documentation is available at https://52.safe-numbers.prtest3.cppalliance.org/libs/safe_numbers/doc/html/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-02-13 21:24:06 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.8%. Comparing base (0d2bc22) to head (f499cff).
⚠️ Report is 7 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop     #52     +/-   ##
=========================================
+ Coverage     98.8%   98.8%   +0.1%     
=========================================
  Files           96      98      +2     
  Lines         5778    5925    +147     
  Branches      1874    1943     +69     
=========================================
+ Hits          5704    5851    +147     
  Misses          27      27             
  Partials        47      47             

Files with missing lines	Coverage Δ
include/boost/safe_numbers/integer_utilities.hpp	100.0% <100.0%> (ø)
test/test_isqrt.cpp	100.0% <100.0%> (ø)
test/test_verified_mixed_ops.cpp	100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0d2bc22...f499cff. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.