Add is power of 10 helper function

[mborland]

Closes: #54

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.9%. Comparing base (ab11f3c) to head (54d147c).
⚠️ Report is 6 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop     #60     +/-   ##
=========================================
+ Coverage     98.9%   98.9%   +0.1%     
=========================================
  Files          100     101      +1     
  Lines         6175    6273     +98     
  Branches      2024    2083     +59     
=========================================
+ Hits          6101    6199     +98     
  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_is_power_10.cpp	100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes

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[cppalliance-bot]

An automated preview of the documentation is available at https://60.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.

2026-02-16 18:14:06 UTC