Adding `generics2` library as a dependency

Run this command in a terminal, in your project's directory:

cargo add generics2

To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:

generics2 = "0.3.3"

The generics2 library will be automatically available globally. Read the generics2 library documentation.

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Readme

generics2

Provides macros for parsing generics and where clauses in macro_rules!.

pub trait TheTrait { }

#[doc(hidden)]
pub use generics2::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)? )?'"
        );
    };
}

Adding generics2 library as a dependency

Adding `generics2` library as a dependency