Macro variadic_closure::variadic_closure

macro_rules! variadic_closure {
    ( fn $fn:ident ( ) -> $ret:ty $body:block ) => { ... };
    ( fn $fn:ident (
        $arg1: ident : $argty1:ty
    ) -> $ret:ty $body:block ) => { ... };
    ( fn $fn:ident (
        $arg1: ident : $argty1:ty,
        $arg2: ident : $argty2:ty
    ) -> $ret:ty $body:block ) => { ... };
    ( fn $fn:ident (
        $arg1: ident : $argty1:ty,
        $arg2: ident : $argty2:ty,
        $arg3: ident : $argty3:ty
    ) -> $ret:ty $body:block ) => { ... };
    ( fn $fn:ident (
        $arg1: ident : $argty1:ty,
        $arg2: ident : $argty2:ty,
        $arg3: ident : $argty3:ty,
        $arg4: ident : $argty4:ty
    ) -> $ret:ty $body:block ) => { ... };
    ( fn $fn:ident (
        $arg1: ident : $argty1:ty,
        $arg2: ident : $argty2:ty,
        $arg3: ident : $argty3:ty,
        $arg4: ident : $argty4:ty,
        $arg5: ident : $argty5:ty
    ) -> $ret:ty $body:block ) => { ... };
    ( fn $fn:ident (
        $arg1: ident : $argty1:ty,
        $arg2: ident : $argty2:ty,
        $arg3: ident : $argty3:ty,
        $arg4: ident : $argty4:ty,
        $arg5: ident : $argty5:ty,
        $arg6: ident : $argty6:ty
    ) -> $ret:ty $body:block ) => { ... };
}