Implement #28 Fix stm

[codecov-commenter]

Codecov Report

Merging #42 (99b1458) into main (d014eee) will increase coverage by 0.16%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #42      +/-   ##
==========================================
+ Coverage   71.96%   72.12%   +0.16%     
==========================================
  Files           1        1              
  Lines         938      940       +2     
  Branches      261      261              
==========================================
+ Hits          675      678       +3     
+ Misses         32       31       -1     
  Partials      231      231              

Impacted Files	Coverage Δ
include/hspp.h	72.12% <0.00%> (+0.16%)	:arrow_up:

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[BowenFu]

Fix #28