Hiya, have just published tynm , a crate that provides functions to get shorter type names.

Links:

Examples:

// === std library === // assert_eq!( std::any::type_name::<Option<String>>(), "core::option::Option<alloc::string::String>", ); // === tynm === // // Simple type name: assert_eq!(tynm::type_name::<Option<String>>(), "Option<String>",); // Type name with 1 module segment, starting from the most significant module. assert_eq!( tynm::type_namem::<Option<String>>(1), "core::..::Option<alloc::..::String>", ); // Type name with 1 module segment, starting from the least significant module. assert_eq!( tynm::type_namen::<Option<String>>(1), "..::option::Option<..::string::String>", ); // Type name with 1 module segment from both the most and least significant modules. #[rustfmt::skip] mod rust_out { pub mod two { pub mod three { pub struct Struct; } } } assert_eq!( tynm::type_namemn::<rust_out::two::three::Struct>(1, 1), "rust_out::..::three::Struct", );

Motivation:

The std::any::type_name function stabilized in Rust 1.38 returns the fully qualified type name with all module segments. This can be difficult to read in error messages, especially for type-parameterized types.

Often, the simple type name is more readable, and enough to distinguish the type referenced in an error.