Improve template instantiation for GetMethodTemplate

[aaronj0]

No description provided.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[vgvassilev]

I suspect this needs tests. Otherwise lgtm.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.30%. Comparing base (12e6e69) to head (8315f8c).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/Interpreter/CppInterOp.cpp	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #326      +/-   ##
==========================================
+ Coverage   73.71%   74.30%   +0.58%     
==========================================
  Files           8        8              
  Lines        3021     3191     +170     
==========================================
+ Hits         2227     2371     +144     
- Misses        794      820      +26     

Files with missing lines	Coverage Δ
lib/Interpreter/CppInterOp.cpp	79.86% <85.71%> (+0.29%)	⬆️

... and 6 files with indirect coverage changes

Files with missing lines	Coverage Δ
lib/Interpreter/CppInterOp.cpp	79.86% <85.71%> (+0.29%)	⬆️

... and 6 files with indirect coverage changes

[aaronj0]

I suspect this needs tests. Otherwise lgtm.

@vgvassilev This allows the calls like cppyy.ll.cast["float"](1) to succeed, and enables 2 tests on all platforms that can be seen in the CI. A unittest has also been added.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[vgvassilev]

Lgtm!