[2.4] support expr template values

[shanghaikid]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.17%. Comparing base (646418e) to head (6c565c5).
Report is 1 commits behind head on 2.4.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4     #391      +/-   ##
==========================================
+ Coverage   97.08%   97.17%   +0.08%     
==========================================
  Files          43       43              
  Lines        2749     2792      +43     
  Branches      646      667      +21     
==========================================
+ Hits         2669     2713      +44     
+ Misses         80       79       -1     

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