Implement total ordering function from IEEE 754

[mborland]

Closes: #1177

[cppalliance-bot]

An automated preview of the documentation is available at https://1183.decimal.prtest3.cppalliance.org/libs/decimal/doc/html/index.html

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

2025-11-04 13:20:19 UTC

[codecov]

Codecov Report

❌ Patch coverage is 90.58824% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.2%. Comparing base (c1aaf47) to head (0fb69af).
⚠️ Report is 16 commits behind head on develop.

Files with missing lines	Patch %	Lines
...nclude/boost/decimal/detail/cmath/comparetotal.hpp	69.3%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #1183     +/-   ##
=========================================
- Coverage     99.3%   99.2%   -0.0%     
=========================================
  Files          255     257      +2     
  Lines        17049   17134     +85     
  Branches      1915    1935     +20     
=========================================
+ Hits         16918   16995     +77     
- Misses         131     139      +8     

Files with missing lines	Coverage Δ
include/boost/decimal/cmath.hpp	100.0% <ø> (ø)
include/boost/decimal/decimal_fast64_t.hpp	100.0% <ø> (ø)
test/test_total_ordering.cpp	100.0% <100.0%> (ø)
...nclude/boost/decimal/detail/cmath/comparetotal.hpp	69.3% <69.3%> (ø)

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