Fix synth literal function for enums

[kchristin22]

Tested in PR #1111

[github-actions[bot]]

clang-tidy review says "All clean, LGTM! :+1:"

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.24%. Comparing base (8ed2707) to head (b3cae4a). Report is 4 commits behind head on master.

Additional details and impacted files

[](https://app.codecov.io/gh/vgvassilev/clad/pull/1113?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev) ```diff @@ Coverage Diff @@ ## master #1113 +/- ## ========================================== + Coverage 94.21% 94.24% +0.02% ========================================== Files 48 48 Lines 8131 8164 +33 ========================================== + Hits 7661 7694 +33 Misses 470 470 ``` | [Files with missing lines](https://app.codecov.io/gh/vgvassilev/clad/pull/1113?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev) | Coverage Δ | | |---|---|---| | [lib/Differentiator/ConstantFolder.cpp](https://app.codecov.io/gh/vgvassilev/clad/pull/1113?src=pr&el=tree&filepath=lib%2FDifferentiator%2FConstantFolder.cpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev#diff-bGliL0RpZmZlcmVudGlhdG9yL0NvbnN0YW50Rm9sZGVyLmNwcA==) | `43.13% <100.00%> (+3.55%)` | :arrow_up: | ... and [4 files with indirect coverage changes](https://app.codecov.io/gh/vgvassilev/clad/pull/1113/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev) | [Files with missing lines](https://app.codecov.io/gh/vgvassilev/clad/pull/1113?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev) | Coverage Δ | | |---|---|---| | [lib/Differentiator/ConstantFolder.cpp](https://app.codecov.io/gh/vgvassilev/clad/pull/1113?src=pr&el=tree&filepath=lib%2FDifferentiator%2FConstantFolder.cpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev#diff-bGliL0RpZmZlcmVudGlhdG9yL0NvbnN0YW50Rm9sZGVyLmNwcA==) | `43.13% <100.00%> (+3.55%)` | :arrow_up: | ... and [4 files with indirect coverage changes](https://app.codecov.io/gh/vgvassilev/clad/pull/1113/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vassil+Vassilev)

[github-actions[bot]]

clang-tidy review says "All clean, LGTM! :+1:"

[github-actions[bot]]

clang-tidy review says "All clean, LGTM! :+1:"

[github-actions[bot]]

clang-tidy review says "All clean, LGTM! :+1:"

[github-actions[bot]]

clang-tidy review says "All clean, LGTM! :+1:"

[github-actions[bot]]

clang-tidy review says "All clean, LGTM! :+1:"