#[macro_export]
macro_rules! builder_trait_decl {
    (
        $scope:vis trait $name:ident
        $(<
            $generic0Name:ident $(: $generic0Bound:path)? $(, $genericNName:ident $(: $genericNBound:path)?)*
        >)?
        $(: $base0:path $(, $baseN:path)*)?
        { $($body:tt)* }
    ) => {
        $scope trait $name
        <
            'source, 'pos, P:Pos<'pos>, CS:CollectedSubstring<'source>
            $(, $generic0Name $(: $generic0Bound)? $(, $genericNName $(: $genericNBound)?)* )?
        >
        $(: $base0 $(, $baseN)*)?
        { $($body)* }
    };
    
    (
        $scope:vis trait $name:ident
        <
            $lifetime0Name:lifetime $(, $lifetimeNName:lifetime)*
            $(, $genericNName:ident $(: $genericNBound:path)?)*
        >
        $(: $base0:path $(, $baseN:path)*)?
        { $($body:tt)* }
    ) => {
        $scope trait $name
        <
            'source, 'pos, $lifetime0Name $(, $lifetimeNName)*,
            P: Pos<'pos>, CS: CollectedSubstring<'source>
            $(, $genericNName $(: $genericNBound)?)*
        >
       $(: $base0 $(, $baseN)*)?
        { $($body)* }
    };
}