Fix several bugs related to macro expansions

[cschreib]

This PR does the following:

• Fixes #61
• Fixes #66
• Fixes #67
• Fixes #68

[codecov-commenter]

Codecov Report

Merging #69 (e0f3c48) into main (8dc9f62) will not change coverage. The diff coverage is n/a.

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Additional details and impacted files

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