Rudimentary type-safety in Rust macro_rules macros
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Published: June 30, 2025

Although Rust’s macro_rules macros operates on syntax trees and thus cannot propagate types, there are ways to make the compiler do it for you. One such trick is to insert a function call that expects only the specific type you want, which then fails for the other types that are not expected by the macro. Picked up from StackOverflow: https://stackoverflow.com/a/34214916