rust/tests/target/macro_rules.rs

// rustfmt-error_on_line_overflow: false

macro_rules! m {
    () => {};
    ($x:ident) => {};
    ($m1:ident, $m2:ident, $x:ident) => {};
    ($($beginning:ident),*; $middle:ident; $($end:ident),*) => {};
    (
        $($beginning:ident),*;
        $middle:ident;
        $($end:ident),*;
        $($beginning:ident),*;
        $middle:ident;
        $($end:ident),*
    ) => {};
    ($name:ident($($dol:tt $var:ident)*) $($body:tt)*) => {};
    (
        $($i:ident : $ty:ty, $def:expr, $stb:expr, $($dstring:tt),+);+ $(;)*
        $($i:ident : $ty:ty, $def:expr, $stb:expr, $($dstring:tt),+);+ $(;)*
    ) => {};
    ($foo:tt foo[$attr:meta] $name:ident) => {};
    ($foo:tt[$attr:meta] $name:ident) => {};
    ($foo:tt &'a[$attr:meta] $name:ident) => {};
    ($foo:tt foo #[$attr:meta] $name:ident) => {};
    ($foo:tt #[$attr:meta] $name:ident) => {};
    ($foo:tt &'a #[$attr:meta] $name:ident) => {};
    ($x:tt foo bar foo bar foo bar $y:tt => x * y * z $z:tt, $($a:tt),*) => {};
}

macro_rules! impl_a_method {
    ($n:ident($a:ident : $ta:ty) -> $ret:ty { $body:expr }) => {
        fn $n($a: $ta) -> $ret {
            $body
        }
        macro_rules! $n {
            ($va: expr) => {
                $n($va)
            };
        }
    };
    ($n:ident($a:ident : $ta:ty, $b:ident : $tb:ty) -> $ret:ty { $body:expr }) => {
        fn $n($a: $ta, $b: $tb) -> $ret {
            $body
        }
        macro_rules! $n {
            ($va: expr,$vb: expr) => {
                $n($va, $vb)
            };
        }
    };
    (
        $n:ident($a:ident : $ta:ty, $b:ident : $tb:ty, $c:ident : $tc:ty) -> $ret:ty { $body:expr }
    ) => {
        fn $n($a: $ta, $b: $tb, $c: $tc) -> $ret {
            $body
        }
        macro_rules! $n {
            ($va: expr,$vb: expr,$vc: expr) => {
                $n($va, $vb, $vc)
            };
        }
    };
    (
        $n:ident($a:ident : $ta:ty, $b:ident : $tb:ty, $c:ident : $tc:ty, $d:ident : $td:ty) ->
        $ret:ty { $body:expr }
    ) => {
        fn $n($a: $ta, $b: $tb, $c: $tc, $d: $td) -> $ret {
            $body
        }
        macro_rules! $n {
            ($va: expr,$vb: expr,$vc: expr,$vd: expr) => {
                $n($va, $vb, $vc, $vd)
            };
        }
    };
}

macro_rules! m {
    // a
    ($expr:expr, $($func:ident)*) => {{
        let x = $expr;
        $func(x)
    }};

    /* b */
    () => {
        /* c */
    };

    (@tag) => {};

    // d
    ($item:ident) => {
        mod macro_item {
            struct $item;
        }
    };
}

macro m2 {
    // a
    ($expr:expr, $($func:ident)*) => {{
        let x = $expr;
        $func(x)
    }}

    /* b */
    () => {
        /* c */
    }

    (@tag) => {}

    // d
    ($item:ident) => {
        mod macro_item {
            struct $item;
        }
    }
}

// #2438, #2476
macro_rules! m {
    () => {
        fn foo() {
            this_line_is_98_characters_long_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx();
        }
    };
}
macro_rules! m {
    () => {
        fn foo() {
            this_line_is_99_characters_long_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(
            );
        }
    };
}
macro_rules! m {
    () => {
        fn foo() {
            this_line_is_100_characters_long_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(
            );
        }
    };
}
macro_rules! m {
    () => {
        fn foo() {
            this_line_is_101_characters_long_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(
            );
        }
    };
}

// #2439
macro_rules! m {
    (
        $line0_xxxxxxxxxxxxxxxxx:expr,
        $line1_xxxxxxxxxxxxxxxxx:expr,
        $line2_xxxxxxxxxxxxxxxxx:expr,
        $line3_xxxxxxxxxxxxxxxxx:expr,
    ) => {};
}

// #2466
// Skip formatting `macro_rules!` that are not using `{}`.
macro_rules! m (
    () => ()
);
macro_rules! m [
    () => ()
];

// #2470
macro foo($type_name:ident, $docs:expr) {
    #[allow(non_camel_case_types)]
    #[doc=$docs]
    #[derive(Debug, Clone, Copy)]
    pub struct $type_name;
}

// #2534
macro_rules! foo {
    ($a:ident : $b:ty) => {};
    ($a:ident $b:ident $c:ident) => {};
}

// #2538
macro_rules! add_message_to_notes {
    ($msg:expr) => {{
        let mut lines = message.lines();
        notes.push_str(&format!("\n{}: {}", level, lines.next().unwrap()));
        for line in lines {
            notes.push_str(&format!(
                "\n{:indent$}{line}",
                "",
                indent = level.len() + 2,
                line = line,
            ));
        }
    }};
}

// #2560
macro_rules! binary {
    ($_self:ident, $expr:expr, $lhs:expr, $func:ident) => {
        while $_self.matched($expr) {
            let op = $_self.get_binary_op()?;

            let rhs = Box::new($_self.$func()?);

            $lhs = Spanned {
                span: $lhs.get_span().to(rhs.get_span()),
                value: Expression::Binary {
                    lhs: Box::new($lhs),
                    op,
                    rhs,
                },
            }
        }
    };
}

// #2558
macro_rules! m {
    ($x:) => {};
    ($($foo:expr)()?) => {};
}