Attribute macro for code duplication with substitution.
If you find yourself in need of copying a block of code and then making some small changes to fit the new use case, this crate is for you.
The duplicate attribute macro will duplicate an item any number of times while inserting custom code in the designated places in each duplicate.
For an in-depth explanation of the syntax and features, see the documentation.
``` use duplicate::duplicate;
/// Trait we want to implement for u8, u16, and u32 trait IsMax { /// Returns true if self is its maximum possible value. fn is_max(&self) -> bool; }
inttype [ u8 ] [ u16 ] [ u32 ] maxvalue [ 255 ] [ 65535 ] [ 4294967295 ] )] impl IsMax for inttype { fn ismax(&self) -> bool { *self == max_value } }
assert!(!42u8.ismax()); assert!(!42u16.ismax()); assert!(!42u32.is_max()); ``` Expands to:
``` use duplicate::duplicate;
/// Trait we want to implement for u8, u16, and u32 trait IsMax { /// Returns true if self is its maximum possible value. fn is_max(&self) -> bool; }
impl IsMax for u8 { fn ismax(&self) -> bool { *self == 255 } } impl IsMax for u16 { fn ismax(&self) -> bool { *self == 65535 } } impl IsMax for u32 { fn ismax(&self) -> bool { *self == 4294967_295 } }
assert!(!42u8.ismax()); assert!(!42u16.ismax()); assert!(!42u32.is_max()); ```
Licensed under either of Apache License, Version 2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.