Macro Renames

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In versions of Rust prior to 1.31.0, Rust didn't support importing macros by path. They could only be brought into scope by #[macro_use]. This can create collisions if two packages export the same macros. See issue #30 for an example. To workaround this, Strum supports renaming specific macros using feature flags. The table below shows for each macro, the corresponding feature flag, and the name of the macro after the feature is enabled.

Original Macro Name	Feature Flag	New Macro Name
EnumString	verbose-enumstring-name	StrumEnumString
AsRefStr	verbose-asrefstr-name	StrumAsRefStr
AsStaticStr	verbose-asstaticstr-name	StrumAsStaticStr
IntoStaticStr	verbose-intostaticstr-name	StrumIntoStaticStr
ToString	verbose-tostring-name	StrumToString
Display	verbose-display-name	StrumDisplay
EnumIter	verbose-enumiter-name	StrumEnumIter
EnumMessage	verbose-enummessage-name	StrumEnumMessage
EnumProperty	verbose-enumproperty-name	StrumProperty
EnumDiscriminants	verbose-enumdiscriminants-name	StrumEnumDiscriminants
EnumCount	verbose-enumcount-name	StrumEnumCount

Example Cargo.toml:

[dependencies]
strum = { version = "0.14" }
strum_macros = { version = "0.14", features = [ "verbose-tostring-name" ] }

Now instead of writing #[derive(ToString)], a library would instead write #[derive(StrumToString)]. This way Strum can still be used in older versions of Rust without worrying about name collisions.

You do not need this in versions of rust >= 1.31. You can and should prefer importing macros by path use strum::ToString