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    pub use serde::de::{Deserialize, IntoDeserializer};

    use crate::value::{Array, Table, Value};

    /// Construct a [`toml::Value`] from TOML syntax.
    ///
    /// [`toml::Value`]: value/enum.Value.html
    ///
    /// ```rust
    /// let cargo_toml = toml::toml! {
    ///     [package]
    ///     name = "toml"
    ///     version = "0.4.5"
    ///     authors = ["Alex Crichton <alex@alexcrichton.com>"]
    ///
    ///     [badges]
    ///     travis-ci = { repository = "alexcrichton/toml-rs" }
    ///
    ///     [dependencies]
    ///     serde = "1.0"
    ///
    ///     [dev-dependencies]
    ///     serde_derive = "1.0"
    ///     serde_json = "1.0"
    /// };
    ///
    /// println!("{:#?}", cargo_toml);
    /// ```
    #[macro_export]
    macro_rules! toml {
        ($($toml:tt)+) => {{
            let table = $crate::value::Table::new();
            let mut root = $crate::Value::Table(table);
            $crate::toml_internal!(@toplevel root [] $($toml)+);
            root
        }};
    }

    // TT-muncher to parse TOML syntax into a toml::Value.
    //
    //    @toplevel -- Parse tokens outside of an inline table or inline array. In
    //                 this state, `[table headers]` and `[[array headers]]` are
    //                 allowed and `key = value` pairs are not separated by commas.
    //
    //    @topleveldatetime -- Helper to parse a Datetime from string and insert it
    //                 into a table, continuing in the @toplevel state.
    //
    //    @path -- Turn a path segment into a string. Segments that look like idents
    //                 are stringified, while quoted segments like `"cfg(windows)"`
    //                 are not.
    //
    //    @value -- Parse the value part of a `key = value` pair, which may be a
    //                 primitive or inline table or inline array.
    //
    //    @table -- Parse the contents of an inline table, returning them as a
    //                 toml::Value::Table.
    //
    //    @tabledatetime -- Helper to parse a Datetime from string and insert it
    //                 into a table, continuing in the @table state.
    //
    //    @array -- Parse the contents of an inline array, returning them as a
    //                 toml::Value::Array.
    //
    //    @arraydatetime -- Helper to parse a Datetime from string and push it into
    //                 an array, continuing in the @array state.
    //
    //    @trailingcomma -- Helper to append a comma to a sequence of tokens if the
    //                 sequence is non-empty and does not already end in a trailing
    //                 comma.
    //
    #[macro_export]
    #[doc(hidden)]
    macro_rules! toml_internal {
        // Base case, no elements remaining.
        (@toplevel $root:ident [$($path:tt)*]) => {};

        // Parse negative number `key = -value`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = - $v:tt $($rest:tt)*) => {
            $crate::toml_internal!(@toplevel $root [$($path)*] $($($k)-+).+ = (-$v) $($rest)*);
        };

        // Parse positive number `key = +value`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = + $v:tt $($rest:tt)*) => {
            $crate::toml_internal!(@toplevel $root [$($path)*] $($($k)-+).+ = ($v) $($rest)*);
        };

        // Parse offset datetime `key = 1979-05-27T00:32:00.999999-07:00`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt . $frac:tt - $tzh:tt : $tzm:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec . $frac - $tzh : $tzm) $($rest)*);
        };
        // Space instead of T.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt . $frac:tt - $tzh:tt : $tzm:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec . $frac - $tzh : $tzm) $($rest)*);
        };

        // Parse offset datetime `key = 1979-05-27T00:32:00-07:00`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt - $tzh:tt : $tzm:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec - $tzh : $tzm) $($rest)*);
        };
        // Space instead of T.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt - $tzh:tt : $tzm:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec - $tzh : $tzm) $($rest)*);
        };

        // Parse local datetime `key = 1979-05-27T00:32:00.999999`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt . $frac:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec . $frac) $($rest)*);
        };
        // Space instead of T.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt . $frac:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec . $frac) $($rest)*);
        };

        // Parse offset datetime `key = 1979-05-27T07:32:00Z` and local datetime `key = 1979-05-27T07:32:00`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec) $($rest)*);
        };
        // Space instead of T.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec) $($rest)*);
        };

        // Parse local date `key = 1979-05-27`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($yr - $mo - $day) $($rest)*);
        };

        // Parse local time `key = 00:32:00.999999`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $hr:tt : $min:tt : $sec:tt . $frac:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($hr : $min : $sec . $frac) $($rest)*);
        };

        // Parse local time `key = 07:32:00`.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $hr:tt : $min:tt : $sec:tt $($rest:tt)*) => {
            $crate::toml_internal!(@topleveldatetime $root [$($path)*] $($($k)-+).+ = ($hr : $min : $sec) $($rest)*);
        };

        // Parse any other `key = value` including string, inline array, inline
        // table, number, and boolean.
        (@toplevel $root:ident [$($path:tt)*] $($($k:tt)-+).+ = $v:tt $($rest:tt)*) => {{
            $crate::macros::insert_toml(
                &mut $root,
                &[$($path)* $(&concat!($("-", $crate::toml_internal!(@path $k),)+)[1..], )+],
                $crate::toml_internal!(@value $v));
            $crate::toml_internal!(@toplevel $root [$($path)*] $($rest)*);
        }};

        // Parse array header `[[bin]]`.
        (@toplevel $root:ident $oldpath:tt [[$($($path:tt)-+).+]] $($rest:tt)*) => {
            $crate::macros::push_toml(
                &mut $root,
                &[$(&concat!($("-", $crate::toml_internal!(@path $path),)+)[1..],)+]);
            $crate::toml_internal!(@toplevel $root [$(&concat!($("-", $crate::toml_internal!(@path $path),)+)[1..],)+] $($rest)*);
        };

        // Parse table header `[patch.crates-io]`.
        (@toplevel $root:ident $oldpath:tt [$($($path:tt)-+).+] $($rest:tt)*) => {
            $crate::macros::insert_toml(
                &mut $root,
                &[$(&concat!($("-", $crate::toml_internal!(@path $path),)+)[1..],)+],
                $crate::Value::Table($crate::value::Table::new()));
            $crate::toml_internal!(@toplevel $root [$(&concat!($("-", $crate::toml_internal!(@path $path),)+)[1..],)+] $($rest)*);
        };

        // Parse datetime from string and insert into table.
        (@topleveldatetime $root:ident [$($path:tt)*] $($($k:tt)-+).+ = ($($datetime:tt)+) $($rest:tt)*) => {
            $crate::macros::insert_toml(
                &mut $root,
                &[$($path)* $(&concat!($("-", $crate::toml_internal!(@path $k),)+)[1..], )+],
                $crate::Value::Datetime(concat!($(stringify!($datetime)),+).parse().unwrap()));
            $crate::toml_internal!(@toplevel $root [$($path)*] $($rest)*);
        };

        // Turn a path segment into a string.
        (@path $ident:ident) => {
            stringify!($ident)
        };

        // For a path segment that is not an ident, expect that it is already a
        // quoted string, like in `[target."cfg(windows)".dependencies]`.
        (@path $quoted:tt) => {
            $quoted
        };

        // Construct a Value from an inline table.
        (@value { $($inline:tt)* }) => {{
            let mut table = $crate::Value::Table($crate::value::Table::new());
            $crate::toml_internal!(@trailingcomma (@table table) $($inline)*);
            table
        }};

        // Construct a Value from an inline array.
        (@value [ $($inline:tt)* ]) => {{
            let mut array = $crate::value::Array::new();
            $crate::toml_internal!(@trailingcomma (@array array) $($inline)*);
            $crate::Value::Array(array)
        }};

        (@value (-nan)) => {
            $crate::Value::Float(-::std::f64::NAN)
        };

        (@value (nan)) => {
            $crate::Value::Float(::std::f64::NAN)
        };

        (@value nan) => {
            $crate::Value::Float(::std::f64::NAN)
        };

        (@value (-inf)) => {
            $crate::Value::Float(::std::f64::NEG_INFINITY)
        };

        (@value (inf)) => {
            $crate::Value::Float(::std::f64::INFINITY)
        };

        (@value inf) => {
            $crate::Value::Float(::std::f64::INFINITY)
        };

        // Construct a Value from any other type, probably string or boolean or number.
        (@value $v:tt) => {{
            // TODO: Implement this with something like serde_json::to_value instead.
            let de = $crate::macros::IntoDeserializer::<$crate::de::Error>::into_deserializer($v);
            <$crate::Value as $crate::macros::Deserialize>::deserialize(de).unwrap()
        }};

        // Base case of inline table.
        (@table $root:ident) => {};

        // Parse negative number `key = -value`.
        (@table $root:ident $($($k:tt)-+).+ = - $v:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@table $root $($($k)-+).+ = (-$v) , $($rest)*);
        };

        // Parse positive number `key = +value`.
        (@table $root:ident $($($k:tt)-+).+ = + $v:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@table $root $($($k)-+).+ = ($v) , $($rest)*);
        };

        // Parse offset datetime `key = 1979-05-27T00:32:00.999999-07:00`.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt . $frac:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec . $frac - $tzh : $tzm) $($rest)*);
        };
        // Space instead of T.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt . $frac:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec . $frac - $tzh : $tzm) $($rest)*);
        };

        // Parse offset datetime `key = 1979-05-27T00:32:00-07:00`.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec - $tzh : $tzm) $($rest)*);
        };
        // Space instead of T.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec - $tzh : $tzm) $($rest)*);
        };

        // Parse local datetime `key = 1979-05-27T00:32:00.999999`.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt . $frac:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec . $frac) $($rest)*);
        };
        // Space instead of T.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt . $frac:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec . $frac) $($rest)*);
        };

        // Parse offset datetime `key = 1979-05-27T07:32:00Z` and local datetime `key = 1979-05-27T07:32:00`.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $dhr : $min : $sec) $($rest)*);
        };
        // Space instead of T.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $day T $hr : $min : $sec) $($rest)*);
        };

        // Parse local date `key = 1979-05-27`.
        (@table $root:ident $($($k:tt)-+).+ = $yr:tt - $mo:tt - $day:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($yr - $mo - $day) $($rest)*);
        };

        // Parse local time `key = 00:32:00.999999`.
        (@table $root:ident $($($k:tt)-+).+ = $hr:tt : $min:tt : $sec:tt . $frac:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($hr : $min : $sec . $frac) $($rest)*);
        };

        // Parse local time `key = 07:32:00`.
        (@table $root:ident $($($k:tt)-+).+ = $hr:tt : $min:tt : $sec:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@tabledatetime $root $($($k)-+).+ = ($hr : $min : $sec) $($rest)*);
        };

        // Parse any other type, probably string or boolean or number.
        (@table $root:ident $($($k:tt)-+).+ = $v:tt , $($rest:tt)*) => {
            $crate::macros::insert_toml(
                &mut $root,
                &[$(&concat!($("-", $crate::toml_internal!(@path $k),)+)[1..], )+],
                $crate::toml_internal!(@value $v));
            $crate::toml_internal!(@table $root $($rest)*);
        };

        // Parse a Datetime from string and continue in @table state.
        (@tabledatetime $root:ident $($($k:tt)-+).+ = ($($datetime:tt)*) $($rest:tt)*) => {
            $crate::macros::insert_toml(
                &mut $root,
                &[$(&concat!($("-", $crate::toml_internal!(@path $k),)+)[1..], )+],
                $crate::Value::Datetime(concat!($(stringify!($datetime)),+).parse().unwrap()));
            $crate::toml_internal!(@table $root $($rest)*);
        };

        // Base case of inline array.
        (@array $root:ident) => {};

        // Parse negative number `-value`.
        (@array $root:ident - $v:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@array $root (-$v) , $($rest)*);
        };

        // Parse positive number `+value`.
        (@array $root:ident + $v:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@array $root ($v) , $($rest)*);
        };

        // Parse offset datetime `1979-05-27T00:32:00.999999-07:00`.
        (@array $root:ident $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt . $frac:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $dhr : $min : $sec . $frac - $tzh : $tzm) $($rest)*);
        };
        // Space instead of T.
        (@array $root:ident $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt . $frac:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $day T $hr : $min : $sec . $frac - $tzh : $tzm) $($rest)*);
        };

        // Parse offset datetime `1979-05-27T00:32:00-07:00`.
        (@array $root:ident $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $dhr : $min : $sec - $tzh : $tzm) $($rest)*);
        };
        // Space instead of T.
        (@array $root:ident $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt - $tzh:tt : $tzm:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $day T $hr : $min : $sec - $tzh : $tzm) $($rest)*);
        };

        // Parse local datetime `1979-05-27T00:32:00.999999`.
        (@array $root:ident $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt . $frac:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $dhr : $min : $sec . $frac) $($rest)*);
        };
        // Space instead of T.
        (@array $root:ident $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt . $frac:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $day T $hr : $min : $sec . $frac) $($rest)*);
        };

        // Parse offset datetime `1979-05-27T07:32:00Z` and local datetime `1979-05-27T07:32:00`.
        (@array $root:ident $yr:tt - $mo:tt - $dhr:tt : $min:tt : $sec:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $dhr : $min : $sec) $($rest)*);
        };
        // Space instead of T.
        (@array $root:ident $yr:tt - $mo:tt - $day:tt $hr:tt : $min:tt : $sec:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $day T $hr : $min : $sec) $($rest)*);
        };

        // Parse local date `1979-05-27`.
        (@array $root:ident $yr:tt - $mo:tt - $day:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($yr - $mo - $day) $($rest)*);
        };

        // Parse local time `00:32:00.999999`.
        (@array $root:ident $hr:tt : $min:tt : $sec:tt . $frac:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($hr : $min : $sec . $frac) $($rest)*);
        };

        // Parse local time `07:32:00`.
        (@array $root:ident $hr:tt : $min:tt : $sec:tt , $($rest:tt)*) => {
            $crate::toml_internal!(@arraydatetime $root ($hr : $min : $sec) $($rest)*);
        };

        // Parse any other type, probably string or boolean or number.
        (@array $root:ident $v:tt , $($rest:tt)*) => {
            $root.push($crate::toml_internal!(@value $v));
            $crate::toml_internal!(@array $root $($rest)*);
        };

        // Parse a Datetime from string and continue in @array state.
        (@arraydatetime $root:ident ($($datetime:tt)*) $($rest:tt)*) => {
            $root.push($crate::Value::Datetime(concat!($(stringify!($datetime)),+).parse().unwrap()));
            $crate::toml_internal!(@array $root $($rest)*);
        };

        // No trailing comma required if the tokens are empty.
        (@trailingcomma ($($args:tt)*)) => {
            $crate::toml_internal!($($args)*);
        };

        // Tokens end with a trailing comma, do not append another one.
        (@trailingcomma ($($args:tt)*) ,) => {
            $crate::toml_internal!($($args)* ,);
        };

        // Tokens end with something other than comma, append a trailing comma.
        (@trailingcomma ($($args:tt)*) $last:tt) => {
            $crate::toml_internal!($($args)* $last ,);
        };

        // Not yet at the last token.
        (@trailingcomma ($($args:tt)*) $first:tt $($rest:tt)+) => {
            $crate::toml_internal!(@trailingcomma ($($args)* $first) $($rest)+);
        };
    }

    // Called when parsing a `key = value` pair.
    // Inserts an entry into the table at the given path.
    pub fn insert_toml(root: &mut Value, path: &[&str], value: Value) {
        *traverse(root, path) = value;
    }

    // Called when parsing an `[[array header]]`.
    // Pushes an empty table onto the array at the given path.
    pub fn push_toml(root: &mut Value, path: &[&str]) {
        let target = traverse(root, path);
        if !target.is_array() {
            *target = Value::Array(Array::new());
        }
        target
            .as_array_mut()
            .unwrap()
            .push(Value::Table(Table::new()));
    }

    fn traverse<'a>(root: &'a mut Value, path: &[&str]) -> &'a mut Value {
        let mut cur = root;
        for &key in path {
            // Lexical lifetimes :D
            let cur1 = cur;

            // From the TOML spec:
            //
            // > Each double-bracketed sub-table will belong to the most recently
            // > defined table element above it.
            let cur2 = if cur1.is_array() {
                cur1.as_array_mut().unwrap().last_mut().unwrap()
            } else {
                cur1
            };

            // We are about to index into this value, so it better be a table.
            if !cur2.is_table() {
                *cur2 = Value::Table(Table::new());
            }

            if !cur2.as_table().unwrap().contains_key(key) {
                // Insert an empty table for the next loop iteration to point to.
                let empty = Value::Table(Table::new());
                cur2.as_table_mut().unwrap().insert(key.to_owned(), empty);
            }

            // Step into the current table.
            cur = cur2.as_table_mut().unwrap().get_mut(key).unwrap();
        }
        cur
    }