Very deep template instantiation stacks
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- C++
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Description
Just "hello world" example requires template depth limit be 229 for Clang 17.0.1 and 157 for GCC 13.2: https://gcc.godbolt.org/z/K45fxG75T. I think this is too much and cannot work in real world production code.
Do you have ideas what could be improved in this sense and why there are so deep template instantiation stacks?
Maybe something could be optimized in __meta.hpp?
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Research direction
Start with examples/hello_world.cpp and reproduce the reported template-depth measurements on the linked Compiler Explorer cases for Clang 17.0.1 and GCC 13.2. Then inspect __meta.hpp to identify which instantiations contribute to the depth. Done would require a clearly scoped, validated reduction or a documented explanation of why the depth cannot be reduced.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Refactor
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100