Crates.io | generics |
lib.rs | generics |
version | 0.5.3 |
source | src |
created_at | 2020-09-18 10:36:37.380174 |
updated_at | 2024-02-28 05:39:51.504295 |
description | Provides macros for parsing generics (with optional where clause) in `macro_rules!`. |
homepage | |
repository | https://github.com/A1-Triard/generics |
max_upload_size | |
id | 290061 |
size | 49,391 |
Provides macros for parsing generics and where clauses in macro_rules!
.
pub trait TheTrait { }
#[doc(hidden)]
pub use generics::parse as generics_parse;
#[doc(hidden)]
pub use std::compile_error as std_compile_error;
#[macro_export]
macro_rules! impl_the_trait {
(
$name:ident $($token:tt)*
) => {
$crate::generics_parse! {
$crate::impl_the_trait {
@impl $name
}
$($token)*
}
};
(
@impl $name:ident [$($g:tt)*] [$($r:tt)*] [$($w:tt)*]
) => {
impl $($g)* $crate::TheTrait for $name $($r)* $($w)* { }
};
(
@impl $name:ident [$($g:tt)*] [$($r:tt)*] [$($w:tt)*] $($token:tt)+
) => {
$crate::std_compile_error!(
"invalid input, allowed input is '$name $( < $generics > $(where $where_clause)? )?'"
);
};
}