Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

18 files changed, 2642 insertions, 0 deletions

diff --git a/vendor/fluent-bundle/src/args.rs b/vendor/fluent-bundle/src/args.rs
new file mode 100644
index 000000000..b2d17a84b
--- /dev/null
+++ b/vendor/fluent-bundle/src/args.rs
@@ -0,0 +1,120 @@
+use std::borrow::Cow;
+use std::iter::FromIterator;
+
+use crate::types::FluentValue;
+
+/// A map of arguments passed from the code to
+/// the localization to be used for message
+/// formatting.
+///
+/// # Example
+///
+/// ```
+/// use fluent_bundle::{FluentArgs, FluentBundle, FluentResource};
+///
+/// let mut args = FluentArgs::new();
+/// args.set("user", "John");
+/// args.set("emailCount", 5);
+///
+/// let res = FluentResource::try_new(r#"
+///
+/// msg-key = Hello, { $user }. You have { $emailCount } messages.
+///
+/// "#.to_string())
+///     .expect("Failed to parse FTL.");
+///
+/// let mut bundle = FluentBundle::default();
+///
+/// // For this example, we'll turn on BiDi support.
+/// // Please, be careful when doing it, it's a risky move.
+/// bundle.set_use_isolating(false);
+///
+/// bundle.add_resource(res)
+///     .expect("Failed to add a resource.");
+///
+/// let mut err = vec![];
+///
+/// let msg = bundle.get_message("msg-key")
+///     .expect("Failed to retrieve a message.");
+/// let value = msg.value()
+///     .expect("Failed to retrieve a value.");
+///
+/// assert_eq!(
+///     bundle.format_pattern(value, Some(&args), &mut err),
+///     "Hello, John. You have 5 messages."
+/// );
+/// ```
+#[derive(Debug, Default)]
+pub struct FluentArgs<'args>(Vec<(Cow<'args, str>, FluentValue<'args>)>);
+
+impl<'args> FluentArgs<'args> {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn with_capacity(capacity: usize) -> Self {
+        Self(Vec::with_capacity(capacity))
+    }
+
+    pub fn get<K>(&self, key: K) -> Option<&FluentValue<'args>>
+    where
+        K: Into<Cow<'args, str>>,
+    {
+        let key = key.into();
+        if let Ok(idx) = self.0.binary_search_by_key(&&key, |(k, _)| k) {
+            Some(&self.0[idx].1)
+        } else {
+            None
+        }
+    }
+
+    pub fn set<K, V>(&mut self, key: K, value: V)
+    where
+        K: Into<Cow<'args, str>>,
+        V: Into<FluentValue<'args>>,
+    {
+        let key = key.into();
+        let idx = match self.0.binary_search_by_key(&&key, |(k, _)| k) {
+            Ok(idx) => idx,
+            Err(idx) => idx,
+        };
+        self.0.insert(idx, (key, value.into()));
+    }
+
+    pub fn iter(&self) -> impl Iterator<Item = (&str, &FluentValue)> {
+        self.0.iter().map(|(k, v)| (k.as_ref(), v))
+    }
+}
+
+impl<'args, K, V> FromIterator<(K, V)> for FluentArgs<'args>
+where
+    K: Into<Cow<'args, str>>,
+    V: Into<FluentValue<'args>>,
+{
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = (K, V)>,
+    {
+        let iter = iter.into_iter();
+        let mut args = if let Some(size) = iter.size_hint().1 {
+            FluentArgs::with_capacity(size)
+        } else {
+            FluentArgs::new()
+        };
+
+        for (k, v) in iter {
+            args.set(k, v);
+        }
+
+        args
+    }
+}
+
+impl<'args> IntoIterator for FluentArgs<'args> {
+    type Item = (Cow<'args, str>, FluentValue<'args>);
+    type IntoIter = std::vec::IntoIter<Self::Item>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}
diff --git a/vendor/fluent-bundle/src/bundle.rs b/vendor/fluent-bundle/src/bundle.rs
new file mode 100644
index 000000000..3d085cfee
--- /dev/null
+++ b/vendor/fluent-bundle/src/bundle.rs
@@ -0,0 +1,615 @@
+//! `FluentBundle` is a collection of localization messages in Fluent.
+//!
+//! It stores a list of messages in a single locale which can reference one another, use the same
+//! internationalization formatters, functions, scopeironmental variables and are expected to be used
+//! together.
+
+use rustc_hash::FxHashMap;
+use std::borrow::Borrow;
+use std::borrow::Cow;
+use std::collections::hash_map::Entry as HashEntry;
+use std::default::Default;
+use std::fmt;
+
+use fluent_syntax::ast;
+use intl_memoizer::IntlLangMemoizer;
+use unic_langid::LanguageIdentifier;
+
+use crate::args::FluentArgs;
+use crate::entry::Entry;
+use crate::entry::GetEntry;
+use crate::errors::{EntryKind, FluentError};
+use crate::memoizer::MemoizerKind;
+use crate::message::FluentMessage;
+use crate::resolver::{ResolveValue, Scope, WriteValue};
+use crate::resource::FluentResource;
+use crate::types::FluentValue;
+
+/// A collection of localization messages for a single locale, which are meant
+/// to be used together in a single view, widget or any other UI abstraction.
+///
+/// # Examples
+///
+/// ```
+/// use fluent_bundle::{FluentBundle, FluentResource, FluentValue, FluentArgs};
+/// use unic_langid::langid;
+///
+/// // 1. Create a FluentResource
+///
+/// let ftl_string = String::from("intro = Welcome, { $name }.");
+/// let resource = FluentResource::try_new(ftl_string)
+///     .expect("Could not parse an FTL string.");
+///
+///
+/// // 2. Create a FluentBundle
+///
+/// let langid_en = langid!("en-US");
+/// let mut bundle = FluentBundle::new(vec![langid_en]);
+///
+///
+/// // 3. Add the resource to the bundle
+///
+/// bundle.add_resource(&resource)
+///     .expect("Failed to add FTL resources to the bundle.");
+///
+///
+/// // 4. Retrieve a FluentMessage from the bundle
+///
+/// let msg = bundle.get_message("intro")
+///     .expect("Message doesn't exist.");
+///
+/// let mut args = FluentArgs::new();
+/// args.set("name", "Rustacean");
+///
+///
+/// // 5. Format the value of the message
+///
+/// let mut errors = vec![];
+///
+/// let pattern = msg.value()
+///     .expect("Message has no value.");
+///
+/// assert_eq!(
+///     bundle.format_pattern(&pattern, Some(&args), &mut errors),
+///     // The placeholder is wrapper in Unicode Directionality Marks
+///     // to indicate that the placeholder may be of different direction
+///     // than surrounding string.
+///     "Welcome, \u{2068}Rustacean\u{2069}."
+/// );
+///
+/// ```
+///
+/// # `FluentBundle` Life Cycle
+///
+/// ## Create a bundle
+///
+/// To create a bundle, call [`FluentBundle::new`] with a locale list that represents the best
+/// possible fallback chain for a given locale. The simplest case is a one-locale list.
+///
+/// Fluent uses [`LanguageIdentifier`] which can be created using `langid!` macro.
+///
+/// ## Add Resources
+///
+/// Next, call [`add_resource`](FluentBundle::add_resource) one or more times, supplying translations in the FTL syntax.
+///
+/// Since [`FluentBundle`] is generic over anything that can borrow a [`FluentResource`],
+/// one can use [`FluentBundle`] to own its resources, store references to them,
+/// or even [`Rc<FluentResource>`](std::rc::Rc) or [`Arc<FluentResource>`](std::sync::Arc).
+///
+/// The [`FluentBundle`] instance is now ready to be used for localization.
+///
+/// ## Format
+///
+/// To format a translation, call [`get_message`](FluentBundle::get_message) to retrieve a [`FluentMessage`],
+/// and then call [`format_pattern`](FluentBundle::format_pattern) on the message value or attribute in order to
+/// retrieve the translated string.
+///
+/// The result of [`format_pattern`](FluentBundle::format_pattern) is an
+/// [`Cow<str>`](std::borrow::Cow). It is
+/// recommended to treat the result as opaque from the perspective of the program and use it only
+/// to display localized messages. Do not examine it or alter in any way before displaying.  This
+/// is a general good practice as far as all internationalization operations are concerned.
+///
+/// If errors were encountered during formatting, they will be
+/// accumulated in the [`Vec<FluentError>`](FluentError) passed as the third argument.
+///
+/// While they are not fatal, they usually indicate problems with the translation,
+/// and should be logged or reported in a way that allows the developer to notice
+/// and fix them.
+///
+///
+/// # Locale Fallback Chain
+///
+/// [`FluentBundle`] stores messages in a single locale, but keeps a locale fallback chain for the
+/// purpose of language negotiation with i18n formatters. For instance, if date and time formatting
+/// are not available in the first locale, [`FluentBundle`] will use its `locales` fallback chain
+/// to negotiate a sensible fallback for date and time formatting.
+///
+/// # Concurrency
+///
+/// As you may have noticed, [`fluent_bundle::FluentBundle`](crate::FluentBundle) is a specialization of [`fluent_bundle::bundle::FluentBundle`](crate::bundle::FluentBundle)
+/// which works with an [`IntlLangMemoizer`] over [`RefCell`](std::cell::RefCell).
+/// In scenarios where the memoizer must work concurrently, there's an implementation of
+/// [`IntlLangMemoizer`](intl_memoizer::concurrent::IntlLangMemoizer) that uses [`Mutex`](std::sync::Mutex) and there's [`FluentBundle::new_concurrent`] which works with that.
+pub struct FluentBundle<R, M> {
+    pub locales: Vec<LanguageIdentifier>,
+    pub(crate) resources: Vec<R>,
+    pub(crate) entries: FxHashMap<String, Entry>,
+    pub(crate) intls: M,
+    pub(crate) use_isolating: bool,
+    pub(crate) transform: Option<fn(&str) -> Cow<str>>,
+    pub(crate) formatter: Option<fn(&FluentValue, &M) -> Option<String>>,
+}
+
+impl<R, M> FluentBundle<R, M> {
+    /// Adds a resource to the bundle, returning an empty [`Result<T>`] on success.
+    ///
+    /// If any entry in the resource uses the same identifier as an already
+    /// existing key in the bundle, the new entry will be ignored and a
+    /// `FluentError::Overriding` will be added to the result.
+    ///
+    /// The method can take any type that can be borrowed to `FluentResource`:
+    ///   - FluentResource
+    ///   - &FluentResource
+    ///   - Rc<FluentResource>
+    ///   - Arc<FluentResurce>
+    ///
+    /// This allows the user to introduce custom resource management and share
+    /// resources between instances of `FluentBundle`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("
+    /// hello = Hi!
+    /// goodbye = Bye!
+    /// ");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Could not parse an FTL string.");
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    /// bundle.add_resource(resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    /// assert_eq!(true, bundle.has_message("hello"));
+    /// ```
+    ///
+    /// # Whitespace
+    ///
+    /// Message ids must have no leading whitespace. Message values that span
+    /// multiple lines must have leading whitespace on all but the first line. These
+    /// are standard FTL syntax rules that may prove a bit troublesome in source
+    /// code formatting. The [`indoc!`] crate can help with stripping extra indentation
+    /// if you wish to indent your entire message.
+    ///
+    /// [FTL syntax]: https://projectfluent.org/fluent/guide/
+    /// [`indoc!`]: https://github.com/dtolnay/indoc
+    /// [`Result<T>`]: https://doc.rust-lang.org/std/result/enum.Result.html
+    pub fn add_resource(&mut self, r: R) -> Result<(), Vec<FluentError>>
+    where
+        R: Borrow<FluentResource>,
+    {
+        let mut errors = vec![];
+
+        let res = r.borrow();
+        let res_pos = self.resources.len();
+
+        for (entry_pos, entry) in res.entries().enumerate() {
+            let (id, entry) = match entry {
+                ast::Entry::Message(ast::Message { ref id, .. }) => {
+                    (id.name, Entry::Message((res_pos, entry_pos)))
+                }
+                ast::Entry::Term(ast::Term { ref id, .. }) => {
+                    (id.name, Entry::Term((res_pos, entry_pos)))
+                }
+                _ => continue,
+            };
+
+            match self.entries.entry(id.to_string()) {
+                HashEntry::Vacant(empty) => {
+                    empty.insert(entry);
+                }
+                HashEntry::Occupied(_) => {
+                    let kind = match entry {
+                        Entry::Message(..) => EntryKind::Message,
+                        Entry::Term(..) => EntryKind::Term,
+                        _ => unreachable!(),
+                    };
+                    errors.push(FluentError::Overriding {
+                        kind,
+                        id: id.to_string(),
+                    });
+                }
+            }
+        }
+        self.resources.push(r);
+
+        if errors.is_empty() {
+            Ok(())
+        } else {
+            Err(errors)
+        }
+    }
+
+    /// Adds a resource to the bundle, returning an empty [`Result<T>`] on success.
+    ///
+    /// If any entry in the resource uses the same identifier as an already
+    /// existing key in the bundle, the entry will override the previous one.
+    ///
+    /// The method can take any type that can be borrowed as FluentResource:
+    ///   - FluentResource
+    ///   - &FluentResource
+    ///   - Rc<FluentResource>
+    ///   - Arc<FluentResurce>
+    ///
+    /// This allows the user to introduce custom resource management and share
+    /// resources between instances of `FluentBundle`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("
+    /// hello = Hi!
+    /// goodbye = Bye!
+    /// ");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Could not parse an FTL string.");
+    ///
+    /// let ftl_string = String::from("
+    /// hello = Another Hi!
+    /// ");
+    /// let resource2 = FluentResource::try_new(ftl_string)
+    ///     .expect("Could not parse an FTL string.");
+    ///
+    /// let langid_en = langid!("en-US");
+    ///
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    /// bundle.add_resource(resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    ///
+    /// bundle.add_resource_overriding(resource2);
+    ///
+    /// let mut errors = vec![];
+    /// let msg = bundle.get_message("hello")
+    ///     .expect("Failed to retrieve the message");
+    /// let value = msg.value().expect("Failed to retrieve the value of the message");
+    /// assert_eq!(bundle.format_pattern(value, None, &mut errors), "Another Hi!");
+    /// ```
+    ///
+    /// # Whitespace
+    ///
+    /// Message ids must have no leading whitespace. Message values that span
+    /// multiple lines must have leading whitespace on all but the first line. These
+    /// are standard FTL syntax rules that may prove a bit troublesome in source
+    /// code formatting. The [`indoc!`] crate can help with stripping extra indentation
+    /// if you wish to indent your entire message.
+    ///
+    /// [FTL syntax]: https://projectfluent.org/fluent/guide/
+    /// [`indoc!`]: https://github.com/dtolnay/indoc
+    /// [`Result<T>`]: https://doc.rust-lang.org/std/result/enum.Result.html
+    pub fn add_resource_overriding(&mut self, r: R)
+    where
+        R: Borrow<FluentResource>,
+    {
+        let res = r.borrow();
+        let res_pos = self.resources.len();
+
+        for (entry_pos, entry) in res.entries().enumerate() {
+            let (id, entry) = match entry {
+                ast::Entry::Message(ast::Message { ref id, .. }) => {
+                    (id.name, Entry::Message((res_pos, entry_pos)))
+                }
+                ast::Entry::Term(ast::Term { ref id, .. }) => {
+                    (id.name, Entry::Term((res_pos, entry_pos)))
+                }
+                _ => continue,
+            };
+
+            self.entries.insert(id.to_string(), entry);
+        }
+        self.resources.push(r);
+    }
+
+    /// When formatting patterns, `FluentBundle` inserts
+    /// Unicode Directionality Isolation Marks to indicate
+    /// that the direction of a placeable may differ from
+    /// the surrounding message.
+    ///
+    /// This is important for cases such as when a
+    /// right-to-left user name is presented in the
+    /// left-to-right message.
+    ///
+    /// In some cases, such as testing, the user may want
+    /// to disable the isolating.
+    pub fn set_use_isolating(&mut self, value: bool) {
+        self.use_isolating = value;
+    }
+
+    /// This method allows to specify a function that will
+    /// be called on all textual fragments of the pattern
+    /// during formatting.
+    ///
+    /// This is currently primarly used for pseudolocalization,
+    /// and `fluent-pseudo` crate provides a function
+    /// that can be passed here.
+    pub fn set_transform(&mut self, func: Option<fn(&str) -> Cow<str>>) {
+        self.transform = func;
+    }
+
+    /// This method allows to specify a function that will
+    /// be called before any `FluentValue` is formatted
+    /// allowing overrides.
+    ///
+    /// It's particularly useful for plugging in an external
+    /// formatter for `FluentValue::Number`.
+    pub fn set_formatter(&mut self, func: Option<fn(&FluentValue, &M) -> Option<String>>) {
+        self.formatter = func;
+    }
+
+    /// Returns true if this bundle contains a message with the given id.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("hello = Hi!");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Failed to parse an FTL string.");
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    /// bundle.add_resource(&resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    /// assert_eq!(true, bundle.has_message("hello"));
+    ///
+    /// ```
+    pub fn has_message(&self, id: &str) -> bool
+    where
+        R: Borrow<FluentResource>,
+    {
+        self.get_entry_message(id).is_some()
+    }
+
+    /// Retrieves a `FluentMessage` from a bundle.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("hello-world = Hello World!");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Failed to parse an FTL string.");
+    ///
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    ///
+    /// bundle.add_resource(&resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    ///
+    /// let msg = bundle.get_message("hello-world");
+    /// assert_eq!(msg.is_some(), true);
+    /// ```
+    pub fn get_message<'l>(&'l self, id: &str) -> Option<FluentMessage<'l>>
+    where
+        R: Borrow<FluentResource>,
+    {
+        self.get_entry_message(id).map(Into::into)
+    }
+
+    /// Writes a formatted pattern which comes from a `FluentMessage`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("hello-world = Hello World!");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Failed to parse an FTL string.");
+    ///
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    ///
+    /// bundle.add_resource(&resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    ///
+    /// let msg = bundle.get_message("hello-world")
+    ///     .expect("Failed to retrieve a FluentMessage.");
+    ///
+    /// let pattern = msg.value()
+    ///     .expect("Missing Value.");
+    /// let mut errors = vec![];
+    ///
+    /// let mut s = String::new();
+    /// bundle.write_pattern(&mut s, &pattern, None, &mut errors)
+    ///     .expect("Failed to write.");
+    ///
+    /// assert_eq!(s, "Hello World!");
+    /// ```
+    pub fn write_pattern<'bundle, W>(
+        &'bundle self,
+        w: &mut W,
+        pattern: &'bundle ast::Pattern<&str>,
+        args: Option<&'bundle FluentArgs>,
+        errors: &mut Vec<FluentError>,
+    ) -> fmt::Result
+    where
+        R: Borrow<FluentResource>,
+        W: fmt::Write,
+        M: MemoizerKind,
+    {
+        let mut scope = Scope::new(self, args, Some(errors));
+        pattern.write(w, &mut scope)
+    }
+
+    /// Formats a pattern which comes from a `FluentMessage`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("hello-world = Hello World!");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Failed to parse an FTL string.");
+    ///
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    ///
+    /// bundle.add_resource(&resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    ///
+    /// let msg = bundle.get_message("hello-world")
+    ///     .expect("Failed to retrieve a FluentMessage.");
+    ///
+    /// let pattern = msg.value()
+    ///     .expect("Missing Value.");
+    /// let mut errors = vec![];
+    ///
+    /// let result = bundle.format_pattern(&pattern, None, &mut errors);
+    ///
+    /// assert_eq!(result, "Hello World!");
+    /// ```
+    pub fn format_pattern<'bundle>(
+        &'bundle self,
+        pattern: &'bundle ast::Pattern<&str>,
+        args: Option<&'bundle FluentArgs>,
+        errors: &mut Vec<FluentError>,
+    ) -> Cow<'bundle, str>
+    where
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        let mut scope = Scope::new(self, args, Some(errors));
+        let value = pattern.resolve(&mut scope);
+        value.as_string(&scope)
+    }
+
+    /// Makes the provided rust function available to messages with the name `id`. See
+    /// the [FTL syntax guide] to learn how these are used in messages.
+    ///
+    /// FTL functions accept both positional and named args. The rust function you
+    /// provide therefore has two parameters: a slice of values for the positional
+    /// args, and a `FluentArgs` for named args.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource, FluentValue};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("length = { STRLEN(\"12345\") }");
+    /// let resource = FluentResource::try_new(ftl_string)
+    ///     .expect("Could not parse an FTL string.");
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    /// bundle.add_resource(&resource)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    ///
+    /// // Register a fn that maps from string to string length
+    /// bundle.add_function("STRLEN", |positional, _named| match positional {
+    ///     [FluentValue::String(str)] => str.len().into(),
+    ///     _ => FluentValue::Error,
+    /// }).expect("Failed to add a function to the bundle.");
+    ///
+    /// let msg = bundle.get_message("length").expect("Message doesn't exist.");
+    /// let mut errors = vec![];
+    /// let pattern = msg.value().expect("Message has no value.");
+    /// let value = bundle.format_pattern(&pattern, None, &mut errors);
+    /// assert_eq!(&value, "5");
+    /// ```
+    ///
+    /// [FTL syntax guide]: https://projectfluent.org/fluent/guide/functions.html
+    pub fn add_function<F>(&mut self, id: &str, func: F) -> Result<(), FluentError>
+    where
+        F: for<'a> Fn(&[FluentValue<'a>], &FluentArgs) -> FluentValue<'a> + Sync + Send + 'static,
+    {
+        match self.entries.entry(id.to_owned()) {
+            HashEntry::Vacant(entry) => {
+                entry.insert(Entry::Function(Box::new(func)));
+                Ok(())
+            }
+            HashEntry::Occupied(_) => Err(FluentError::Overriding {
+                kind: EntryKind::Function,
+                id: id.to_owned(),
+            }),
+        }
+    }
+}
+
+impl<R> Default for FluentBundle<R, IntlLangMemoizer> {
+    fn default() -> Self {
+        Self::new(vec![LanguageIdentifier::default()])
+    }
+}
+
+impl<R> FluentBundle<R, IntlLangMemoizer> {
+    /// Constructs a FluentBundle. The first element in `locales` should be the
+    /// language this bundle represents, and will be used to determine the
+    /// correct plural rules for this bundle. You can optionally provide extra
+    /// languages in the list; they will be used as fallback date and time
+    /// formatters if a formatter for the primary language is unavailable.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use fluent_bundle::FluentBundle;
+    /// use fluent_bundle::FluentResource;
+    /// use unic_langid::langid;
+    ///
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle: FluentBundle<FluentResource> = FluentBundle::new(vec![langid_en]);
+    /// ```
+    ///
+    /// # Errors
+    ///
+    /// This will panic if no formatters can be found for the locales.
+    pub fn new(locales: Vec<LanguageIdentifier>) -> Self {
+        let first_locale = locales.get(0).cloned().unwrap_or_default();
+        Self {
+            locales,
+            resources: vec![],
+            entries: FxHashMap::default(),
+            intls: IntlLangMemoizer::new(first_locale),
+            use_isolating: true,
+            transform: None,
+            formatter: None,
+        }
+    }
+}
+
+impl crate::memoizer::MemoizerKind for IntlLangMemoizer {
+    fn new(lang: LanguageIdentifier) -> Self
+    where
+        Self: Sized,
+    {
+        Self::new(lang)
+    }
+
+    fn with_try_get_threadsafe<I, R, U>(&self, args: I::Args, cb: U) -> Result<R, I::Error>
+    where
+        Self: Sized,
+        I: intl_memoizer::Memoizable + Send + Sync + 'static,
+        I::Args: Send + Sync + 'static,
+        U: FnOnce(&I) -> R,
+    {
+        self.with_try_get(args, cb)
+    }
+
+    fn stringify_value(
+        &self,
+        value: &dyn crate::types::FluentType,
+    ) -> std::borrow::Cow<'static, str> {
+        value.as_string(self)
+    }
+}
diff --git a/vendor/fluent-bundle/src/concurrent.rs b/vendor/fluent-bundle/src/concurrent.rs
new file mode 100644
index 000000000..b87225efe
--- /dev/null
+++ b/vendor/fluent-bundle/src/concurrent.rs
@@ -0,0 +1,59 @@
+use intl_memoizer::{concurrent::IntlLangMemoizer, Memoizable};
+use rustc_hash::FxHashMap;
+use unic_langid::LanguageIdentifier;
+
+use crate::bundle::FluentBundle;
+use crate::memoizer::MemoizerKind;
+use crate::types::FluentType;
+
+impl<R> FluentBundle<R, IntlLangMemoizer> {
+    /// A constructor analogous to [`FluentBundle::new`] but operating
+    /// on a concurrent version of [`IntlLangMemoizer`] over [`Mutex`](std::sync::Mutex).
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::bundle::FluentBundle;
+    /// use fluent_bundle::FluentResource;
+    /// use unic_langid::langid;
+    ///
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle: FluentBundle<FluentResource, _> =
+    ///     FluentBundle::new_concurrent(vec![langid_en]);
+    /// ```
+    pub fn new_concurrent(locales: Vec<LanguageIdentifier>) -> Self {
+        let first_locale = locales.get(0).cloned().unwrap_or_default();
+        Self {
+            locales,
+            resources: vec![],
+            entries: FxHashMap::default(),
+            intls: IntlLangMemoizer::new(first_locale),
+            use_isolating: true,
+            transform: None,
+            formatter: None,
+        }
+    }
+}
+
+impl MemoizerKind for IntlLangMemoizer {
+    fn new(lang: LanguageIdentifier) -> Self
+    where
+        Self: Sized,
+    {
+        Self::new(lang)
+    }
+
+    fn with_try_get_threadsafe<I, R, U>(&self, args: I::Args, cb: U) -> Result<R, I::Error>
+    where
+        Self: Sized,
+        I: Memoizable + Send + Sync + 'static,
+        I::Args: Send + Sync + 'static,
+        U: FnOnce(&I) -> R,
+    {
+        self.with_try_get(args, cb)
+    }
+
+    fn stringify_value(&self, value: &dyn FluentType) -> std::borrow::Cow<'static, str> {
+        value.as_string_threadsafe(self)
+    }
+}
diff --git a/vendor/fluent-bundle/src/entry.rs b/vendor/fluent-bundle/src/entry.rs
new file mode 100644
index 000000000..1ac8ecf01
--- /dev/null
+++ b/vendor/fluent-bundle/src/entry.rs
@@ -0,0 +1,62 @@
+//! `Entry` is used to store Messages, Terms and Functions in `FluentBundle` instances.
+
+use std::borrow::Borrow;
+
+use fluent_syntax::ast;
+
+use crate::args::FluentArgs;
+use crate::bundle::FluentBundle;
+use crate::resource::FluentResource;
+use crate::types::FluentValue;
+
+pub type FluentFunction =
+    Box<dyn for<'a> Fn(&[FluentValue<'a>], &FluentArgs) -> FluentValue<'a> + Send + Sync>;
+
+pub enum Entry {
+    Message((usize, usize)),
+    Term((usize, usize)),
+    Function(FluentFunction),
+}
+
+pub trait GetEntry {
+    fn get_entry_message(&self, id: &str) -> Option<&ast::Message<&str>>;
+    fn get_entry_term(&self, id: &str) -> Option<&ast::Term<&str>>;
+    fn get_entry_function(&self, id: &str) -> Option<&FluentFunction>;
+}
+
+impl<'bundle, R: Borrow<FluentResource>, M> GetEntry for FluentBundle<R, M> {
+    fn get_entry_message(&self, id: &str) -> Option<&ast::Message<&str>> {
+        self.entries.get(id).and_then(|ref entry| match entry {
+            Entry::Message(pos) => {
+                let res = self.resources.get(pos.0)?.borrow();
+                if let ast::Entry::Message(ref msg) = res.get_entry(pos.1)? {
+                    Some(msg)
+                } else {
+                    None
+                }
+            }
+            _ => None,
+        })
+    }
+
+    fn get_entry_term(&self, id: &str) -> Option<&ast::Term<&str>> {
+        self.entries.get(id).and_then(|ref entry| match entry {
+            Entry::Term(pos) => {
+                let res = self.resources.get(pos.0)?.borrow();
+                if let ast::Entry::Term(ref msg) = res.get_entry(pos.1)? {
+                    Some(msg)
+                } else {
+                    None
+                }
+            }
+            _ => None,
+        })
+    }
+
+    fn get_entry_function(&self, id: &str) -> Option<&FluentFunction> {
+        self.entries.get(id).and_then(|ref entry| match entry {
+            Entry::Function(function) => Some(function),
+            _ => None,
+        })
+    }
+}
diff --git a/vendor/fluent-bundle/src/errors.rs b/vendor/fluent-bundle/src/errors.rs
new file mode 100644
index 000000000..ec4a02c4b
--- /dev/null
+++ b/vendor/fluent-bundle/src/errors.rs
@@ -0,0 +1,86 @@
+use crate::resolver::ResolverError;
+use fluent_syntax::parser::ParserError;
+use std::error::Error;
+
+#[derive(Debug, PartialEq, Clone)]
+pub enum EntryKind {
+    Message,
+    Term,
+    Function,
+}
+
+impl std::fmt::Display for EntryKind {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Message => f.write_str("message"),
+            Self::Term => f.write_str("term"),
+            Self::Function => f.write_str("function"),
+        }
+    }
+}
+
+/// Core error type for Fluent runtime system.
+///
+/// It contains three main types of errors that may come up
+/// during runtime use of the fluent-bundle crate.
+#[derive(Debug, PartialEq, Clone)]
+pub enum FluentError {
+    /// An error which occurs when
+    /// [`FluentBundle::add_resource`](crate::bundle::FluentBundle::add_resource)
+    /// adds entries that are already registered in a given [`FluentBundle`](crate::FluentBundle).
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::{FluentBundle, FluentResource};
+    /// use unic_langid::langid;
+    ///
+    /// let ftl_string = String::from("intro = Welcome, { $name }.");
+    /// let res1 = FluentResource::try_new(ftl_string)
+    ///     .expect("Could not parse an FTL string.");
+    ///
+    /// let ftl_string = String::from("intro = Hi, { $name }.");
+    /// let res2 = FluentResource::try_new(ftl_string)
+    ///     .expect("Could not parse an FTL string.");
+    ///
+    /// let langid_en = langid!("en-US");
+    /// let mut bundle = FluentBundle::new(vec![langid_en]);
+    ///
+    /// bundle.add_resource(&res1)
+    ///     .expect("Failed to add FTL resources to the bundle.");
+    ///
+    /// assert!(bundle.add_resource(&res2).is_err());
+    /// ```
+    Overriding {
+        kind: EntryKind,
+        id: String,
+    },
+    ParserError(ParserError),
+    ResolverError(ResolverError),
+}
+
+impl std::fmt::Display for FluentError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Overriding { kind, id } => {
+                write!(f, "Attempt to override an existing {}: \"{}\".", kind, id)
+            }
+            Self::ParserError(err) => write!(f, "Parser error: {}", err),
+            Self::ResolverError(err) => write!(f, "Resolver error: {}", err),
+        }
+    }
+}
+
+impl Error for FluentError {}
+
+impl From<ResolverError> for FluentError {
+    fn from(error: ResolverError) -> Self {
+        Self::ResolverError(error)
+    }
+}
+
+impl From<ParserError> for FluentError {
+    fn from(error: ParserError) -> Self {
+        Self::ParserError(error)
+    }
+}
diff --git a/vendor/fluent-bundle/src/lib.rs b/vendor/fluent-bundle/src/lib.rs
new file mode 100644
index 000000000..faf3e9ba6
--- /dev/null
+++ b/vendor/fluent-bundle/src/lib.rs
@@ -0,0 +1,127 @@
+//! Fluent is a modern localization system designed to improve how software is translated.
+//!
+//! `fluent-bundle` is a mid-level component of the [Fluent Localization
+//! System](https://www.projectfluent.org).
+//!
+//! The crate builds on top of the low level [`fluent-syntax`](../fluent-syntax) package, and provides
+//! foundational types and structures required for executing localization at runtime.
+//!
+//! There are four core concepts to understand Fluent runtime:
+//!
+//! * [`FluentMessage`] - A single translation unit
+//! * [`FluentResource`] - A list of [`FluentMessage`] units
+//! * [`FluentBundle`](crate::bundle::FluentBundle) - A collection of [`FluentResource`] lists
+//! * [`FluentArgs`] - A list of elements used to resolve a [`FluentMessage`] value
+//!
+//! ## Example
+//!
+//! ```
+//! use fluent_bundle::{FluentBundle, FluentValue, FluentResource, FluentArgs};
+//! // Used to provide a locale for the bundle.
+//! use unic_langid::langid;
+//!
+//! // 1. Crate a FluentResource
+//!
+//! let ftl_string = r#"
+//!
+//! hello-world = Hello, world!
+//! intro = Welcome, { $name }.
+//!
+//! "#.to_string();
+//!
+//! let res = FluentResource::try_new(ftl_string)
+//!     .expect("Failed to parse an FTL string.");
+//!
+//!
+//! // 2. Crate a FluentBundle
+//!
+//! let langid_en = langid!("en-US");
+//! let mut bundle = FluentBundle::new(vec![langid_en]);
+//!
+//!
+//! // 3. Add the resource to the bundle
+//!
+//! bundle
+//!     .add_resource(res)
+//!     .expect("Failed to add FTL resources to the bundle.");
+//!
+//!
+//! // 4. Retrieve a FluentMessage from the bundle
+//!
+//! let msg = bundle.get_message("hello-world")
+//!     .expect("Message doesn't exist.");
+//!
+//!
+//! // 5. Format the value of the simple message
+//!
+//! let mut errors = vec![];
+//!
+//! let pattern = msg.value()
+//!     .expect("Message has no value.");
+//!
+//! let value = bundle.format_pattern(&pattern, None, &mut errors);
+//!
+//! assert_eq!(
+//!     bundle.format_pattern(&pattern, None, &mut errors),
+//!     "Hello, world!"
+//! );
+//!
+//! // 6. Format the value of the message with arguments
+//!
+//! let mut args = FluentArgs::new();
+//! args.set("name", "John");
+//!
+//! let msg = bundle.get_message("intro")
+//!     .expect("Message doesn't exist.");
+//!
+//! let pattern = msg.value()
+//!     .expect("Message has no value.");
+//!
+//! // The FSI/PDI isolation marks ensure that the direction of
+//! // the text from the variable is not affected by the translation.
+//! assert_eq!(
+//!     bundle.format_pattern(&pattern, Some(&args), &mut errors),
+//!     "Welcome, \u{2068}John\u{2069}."
+//! );
+//! ```
+//!
+//! # Ergonomics & Higher Level APIs
+//!
+//! Reading the example, you may notice how verbose it feels.
+//! Many core methods are fallible, others accumulate errors, and there
+//! are intermediate structures used in operations.
+//!
+//! This is intentional as it serves as building blocks for variety of different
+//! scenarios allowing implementations to handle errors, cache and
+//! optimize results.
+//!
+//! At the moment it is expected that users will use
+//! the `fluent-bundle` crate directly, while the ecosystem
+//! matures and higher level APIs are being developed.
+mod args;
+pub mod bundle;
+mod concurrent;
+mod entry;
+mod errors;
+#[doc(hidden)]
+pub mod memoizer;
+mod message;
+#[doc(hidden)]
+pub mod resolver;
+mod resource;
+pub mod types;
+
+pub use args::FluentArgs;
+/// Specialized [`FluentBundle`](crate::bundle::FluentBundle) over
+/// non-concurrent [`IntlLangMemoizer`](intl_memoizer::IntlLangMemoizer).
+///
+/// This is the basic variant of the [`FluentBundle`](crate::bundle::FluentBundle).
+///
+/// The concurrent specialization, can be constructed with
+/// [`FluentBundle::new_concurrent`](crate::bundle::FluentBundle::new_concurrent).
+pub type FluentBundle<R> = bundle::FluentBundle<R, intl_memoizer::IntlLangMemoizer>;
+pub use errors::FluentError;
+pub use message::{FluentAttribute, FluentMessage};
+pub use resource::FluentResource;
+#[doc(inline)]
+pub use types::FluentValue;
diff --git a/vendor/fluent-bundle/src/memoizer.rs b/vendor/fluent-bundle/src/memoizer.rs
new file mode 100644
index 000000000..c738a857b
--- /dev/null
+++ b/vendor/fluent-bundle/src/memoizer.rs
@@ -0,0 +1,18 @@
+use crate::types::FluentType;
+use intl_memoizer::Memoizable;
+use unic_langid::LanguageIdentifier;
+
+pub trait MemoizerKind: 'static {
+    fn new(lang: LanguageIdentifier) -> Self
+    where
+        Self: Sized;
+
+    fn with_try_get_threadsafe<I, R, U>(&self, args: I::Args, cb: U) -> Result<R, I::Error>
+    where
+        Self: Sized,
+        I: Memoizable + Send + Sync + 'static,
+        I::Args: Send + Sync + 'static,
+        U: FnOnce(&I) -> R;
+
+    fn stringify_value(&self, value: &dyn FluentType) -> std::borrow::Cow<'static, str>;
+}
diff --git a/vendor/fluent-bundle/src/message.rs b/vendor/fluent-bundle/src/message.rs
new file mode 100644
index 000000000..a6cc00d77
--- /dev/null
+++ b/vendor/fluent-bundle/src/message.rs
@@ -0,0 +1,274 @@
+use fluent_syntax::ast;
+
+/// [`FluentAttribute`] is a component of a compound [`FluentMessage`].
+///
+/// It represents a key-value pair providing a translation of a component
+/// of a user interface widget localized by the given message.
+///
+/// # Example
+///
+/// ```
+/// use fluent_bundle::{FluentResource, FluentBundle};
+///
+/// let source = r#"
+///
+/// confirm-modal = Are you sure?
+///     .confirm = Yes
+///     .cancel = No
+///     .tooltip = Closing the window will lose all unsaved data.
+///
+/// "#;
+///
+/// let resource = FluentResource::try_new(source.to_string())
+///     .expect("Failed to parse the resource.");
+///
+/// let mut bundle = FluentBundle::default();
+/// bundle.add_resource(resource)
+///     .expect("Failed to add a resource.");
+///
+/// let msg = bundle.get_message("confirm-modal")
+///     .expect("Failed to retrieve a message.");
+///
+/// let mut err = vec![];
+///
+/// let attributes = msg.attributes().map(|attr| {
+///     bundle.format_pattern(attr.value(), None, &mut err)
+/// }).collect::<Vec<_>>();
+///
+/// assert_eq!(attributes[0], "Yes");
+/// assert_eq!(attributes[1], "No");
+/// assert_eq!(attributes[2], "Closing the window will lose all unsaved data.");
+/// ```
+#[derive(Debug, PartialEq)]
+pub struct FluentAttribute<'m> {
+    node: &'m ast::Attribute<&'m str>,
+}
+
+impl<'m> FluentAttribute<'m> {
+    /// Retrieves an id of an attribute.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use fluent_bundle::{FluentResource, FluentBundle};
+    /// # let source = r#"
+    /// # confirm-modal =
+    /// #     .confirm = Yes
+    /// # "#;
+    /// # let resource = FluentResource::try_new(source.to_string())
+    /// #     .expect("Failed to parse the resource.");
+    /// # let mut bundle = FluentBundle::default();
+    /// # bundle.add_resource(resource)
+    /// #     .expect("Failed to add a resource.");
+    /// let msg = bundle.get_message("confirm-modal")
+    ///     .expect("Failed to retrieve a message.");
+    ///
+    /// let attr1 = msg.attributes().next()
+    ///     .expect("Failed to retrieve an attribute.");
+    ///
+    /// assert_eq!(attr1.id(), "confirm");
+    /// ```
+    pub fn id(&self) -> &'m str {
+        &self.node.id.name
+    }
+
+    /// Retrieves an value of an attribute.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use fluent_bundle::{FluentResource, FluentBundle};
+    /// # let source = r#"
+    /// # confirm-modal =
+    /// #     .confirm = Yes
+    /// # "#;
+    /// # let resource = FluentResource::try_new(source.to_string())
+    /// #     .expect("Failed to parse the resource.");
+    /// # let mut bundle = FluentBundle::default();
+    /// # bundle.add_resource(resource)
+    /// #     .expect("Failed to add a resource.");
+    /// let msg = bundle.get_message("confirm-modal")
+    ///     .expect("Failed to retrieve a message.");
+    ///
+    /// let attr1 = msg.attributes().next()
+    ///     .expect("Failed to retrieve an attribute.");
+    ///
+    /// let mut err = vec![];
+    ///
+    /// let value = attr1.value();
+    /// assert_eq!(
+    ///     bundle.format_pattern(value, None, &mut err),
+    ///     "Yes"
+    /// );
+    /// ```
+    pub fn value(&self) -> &'m ast::Pattern<&'m str> {
+        &self.node.value
+    }
+}
+
+impl<'m> From<&'m ast::Attribute<&'m str>> for FluentAttribute<'m> {
+    fn from(attr: &'m ast::Attribute<&'m str>) -> Self {
+        FluentAttribute { node: attr }
+    }
+}
+
+/// [`FluentMessage`] is a basic translation unit of the Fluent system.
+///
+/// The instance of a message is returned from the
+/// [`FluentBundle::get_message`](crate::bundle::FluentBundle::get_message)
+/// method, for the lifetime of the [`FluentBundle`](crate::bundle::FluentBundle) instance.
+///
+/// # Example
+///
+/// ```
+/// use fluent_bundle::{FluentResource, FluentBundle};
+///
+/// let source = r#"
+///
+/// hello-world = Hello World!
+///
+/// "#;
+///
+/// let resource = FluentResource::try_new(source.to_string())
+///     .expect("Failed to parse the resource.");
+///
+/// let mut bundle = FluentBundle::default();
+/// bundle.add_resource(resource)
+///     .expect("Failed to add a resource.");
+///
+/// let msg = bundle.get_message("hello-world")
+///     .expect("Failed to retrieve a message.");
+///
+/// assert!(msg.value().is_some());
+/// ```
+///
+/// That value can be then passed to
+/// [`FluentBundle::format_pattern`](crate::bundle::FluentBundle::format_pattern) to be formatted
+/// within the context of a given [`FluentBundle`](crate::bundle::FluentBundle) instance.
+///
+/// # Compound Message
+///
+/// A message may contain a `value`, but it can also contain a list of [`FluentAttribute`] elements.
+///
+/// If a message contains attributes, it is called a "compound" message.
+///
+/// In such case, the message contains a list of key-value attributes that represent
+/// different translation values associated with a single translation unit.
+///
+/// This is useful for scenarios where a [`FluentMessage`] is associated with a
+/// complex User Interface widget which has multiple attributes that need to be translated.
+/// ```text
+/// confirm-modal = Are you sure?
+///     .confirm = Yes
+///     .cancel = No
+///     .tooltip = Closing the window will lose all unsaved data.
+/// ```
+#[derive(Debug, PartialEq)]
+pub struct FluentMessage<'m> {
+    node: &'m ast::Message<&'m str>,
+}
+
+impl<'m> FluentMessage<'m> {
+    /// Retrieves an option of a [`ast::Pattern`](fluent_syntax::ast::Pattern).
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use fluent_bundle::{FluentResource, FluentBundle};
+    /// # let source = r#"
+    /// # hello-world = Hello World!
+    /// # "#;
+    /// # let resource = FluentResource::try_new(source.to_string())
+    /// #     .expect("Failed to parse the resource.");
+    /// # let mut bundle = FluentBundle::default();
+    /// # bundle.add_resource(resource)
+    /// #     .expect("Failed to add a resource.");
+    /// let msg = bundle.get_message("hello-world")
+    ///     .expect("Failed to retrieve a message.");
+    ///
+    /// if let Some(value) = msg.value() {
+    ///     let mut err = vec![];
+    ///     assert_eq!(
+    ///         bundle.format_pattern(value, None, &mut err),
+    ///         "Hello World!"
+    ///     );
+    /// #   assert_eq!(err.len(), 0);
+    /// }
+    /// ```
+    pub fn value(&self) -> Option<&'m ast::Pattern<&'m str>> {
+        self.node.value.as_ref()
+    }
+
+    /// An iterator over [`FluentAttribute`] elements.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use fluent_bundle::{FluentResource, FluentBundle};
+    /// # let source = r#"
+    /// # hello-world =
+    /// #     .label = This is a label
+    /// #     .accesskey = C
+    /// # "#;
+    /// # let resource = FluentResource::try_new(source.to_string())
+    /// #     .expect("Failed to parse the resource.");
+    /// # let mut bundle = FluentBundle::default();
+    /// # bundle.add_resource(resource)
+    /// #     .expect("Failed to add a resource.");
+    /// let msg = bundle.get_message("hello-world")
+    ///     .expect("Failed to retrieve a message.");
+    ///
+    /// let mut err = vec![];
+    ///
+    /// for attr in msg.attributes() {
+    ///     let _ = bundle.format_pattern(attr.value(), None, &mut err);
+    /// }
+    /// # assert_eq!(err.len(), 0);
+    /// ```
+    pub fn attributes(&self) -> impl Iterator<Item = FluentAttribute<'m>> {
+        self.node.attributes.iter().map(Into::into)
+    }
+
+    /// Retrieve a single [`FluentAttribute`] element.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use fluent_bundle::{FluentResource, FluentBundle};
+    /// # let source = r#"
+    /// # hello-world =
+    /// #     .label = This is a label
+    /// #     .accesskey = C
+    /// # "#;
+    /// # let resource = FluentResource::try_new(source.to_string())
+    /// #     .expect("Failed to parse the resource.");
+    /// # let mut bundle = FluentBundle::default();
+    /// # bundle.add_resource(resource)
+    /// #     .expect("Failed to add a resource.");
+    /// let msg = bundle.get_message("hello-world")
+    ///     .expect("Failed to retrieve a message.");
+    ///
+    /// let mut err = vec![];
+    ///
+    /// if let Some(attr) = msg.get_attribute("label") {
+    ///     assert_eq!(
+    ///         bundle.format_pattern(attr.value(), None, &mut err),
+    ///         "This is a label"
+    ///     );
+    /// }
+    /// # assert_eq!(err.len(), 0);
+    /// ```
+    pub fn get_attribute(&self, key: &str) -> Option<FluentAttribute<'m>> {
+        self.node
+            .attributes
+            .iter()
+            .find(|attr| attr.id.name == key)
+            .map(Into::into)
+    }
+}
+
+impl<'m> From<&'m ast::Message<&'m str>> for FluentMessage<'m> {
+    fn from(msg: &'m ast::Message<&'m str>) -> Self {
+        FluentMessage { node: msg }
+    }
+}
diff --git a/vendor/fluent-bundle/src/resolver/errors.rs b/vendor/fluent-bundle/src/resolver/errors.rs
new file mode 100644
index 000000000..831d8474a
--- /dev/null
+++ b/vendor/fluent-bundle/src/resolver/errors.rs
@@ -0,0 +1,96 @@
+use fluent_syntax::ast::InlineExpression;
+use std::error::Error;
+
+#[derive(Debug, PartialEq, Clone)]
+pub enum ReferenceKind {
+    Function {
+        id: String,
+    },
+    Message {
+        id: String,
+        attribute: Option<String>,
+    },
+    Term {
+        id: String,
+        attribute: Option<String>,
+    },
+    Variable {
+        id: String,
+    },
+}
+
+impl<T> From<&InlineExpression<T>> for ReferenceKind
+where
+    T: ToString,
+{
+    fn from(exp: &InlineExpression<T>) -> Self {
+        match exp {
+            InlineExpression::FunctionReference { id, .. } => Self::Function {
+                id: id.name.to_string(),
+            },
+            InlineExpression::MessageReference { id, attribute } => Self::Message {
+                id: id.name.to_string(),
+                attribute: attribute.as_ref().map(|i| i.name.to_string()),
+            },
+            InlineExpression::TermReference { id, attribute, .. } => Self::Term {
+                id: id.name.to_string(),
+                attribute: attribute.as_ref().map(|i| i.name.to_string()),
+            },
+            InlineExpression::VariableReference { id, .. } => Self::Variable {
+                id: id.name.to_string(),
+            },
+            _ => unreachable!(),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Clone)]
+pub enum ResolverError {
+    Reference(ReferenceKind),
+    NoValue(String),
+    MissingDefault,
+    Cyclic,
+    TooManyPlaceables,
+}
+
+impl std::fmt::Display for ResolverError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Reference(exp) => match exp {
+                ReferenceKind::Function { id } => write!(f, "Unknown function: {}()", id),
+                ReferenceKind::Message {
+                    id,
+                    attribute: None,
+                } => write!(f, "Unknown message: {}", id),
+                ReferenceKind::Message {
+                    id,
+                    attribute: Some(attribute),
+                } => write!(f, "Unknown attribute: {}.{}", id, attribute),
+                ReferenceKind::Term {
+                    id,
+                    attribute: None,
+                } => write!(f, "Unknown term: -{}", id),
+                ReferenceKind::Term {
+                    id,
+                    attribute: Some(attribute),
+                } => write!(f, "Unknown attribute: -{}.{}", id, attribute),
+                ReferenceKind::Variable { id } => write!(f, "Unknown variable: ${}", id),
+            },
+            Self::NoValue(id) => write!(f, "No value: {}", id),
+            Self::MissingDefault => f.write_str("No default"),
+            Self::Cyclic => f.write_str("Cyclical dependency detected"),
+            Self::TooManyPlaceables => f.write_str("Too many placeables"),
+        }
+    }
+}
+
+impl<T> From<&InlineExpression<T>> for ResolverError
+where
+    T: ToString,
+{
+    fn from(exp: &InlineExpression<T>) -> Self {
+        Self::Reference(exp.into())
+    }
+}
+
+impl Error for ResolverError {}
diff --git a/vendor/fluent-bundle/src/resolver/expression.rs b/vendor/fluent-bundle/src/resolver/expression.rs
new file mode 100644
index 000000000..d0d02decd
--- /dev/null
+++ b/vendor/fluent-bundle/src/resolver/expression.rs
@@ -0,0 +1,66 @@
+use super::scope::Scope;
+use super::WriteValue;
+
+use std::borrow::Borrow;
+use std::fmt;
+
+use fluent_syntax::ast;
+
+use crate::memoizer::MemoizerKind;
+use crate::resolver::{ResolveValue, ResolverError};
+use crate::resource::FluentResource;
+use crate::types::FluentValue;
+
+impl<'p> WriteValue for ast::Expression<&'p str> {
+    fn write<'scope, 'errors, W, R, M>(
+        &'scope self,
+        w: &mut W,
+        scope: &mut Scope<'scope, 'errors, R, M>,
+    ) -> fmt::Result
+    where
+        W: fmt::Write,
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        match self {
+            Self::Inline(exp) => exp.write(w, scope),
+            Self::Select { selector, variants } => {
+                let selector = selector.resolve(scope);
+                match selector {
+                    FluentValue::String(_) | FluentValue::Number(_) => {
+                        for variant in variants {
+                            let key = match variant.key {
+                                ast::VariantKey::Identifier { name } => name.into(),
+                                ast::VariantKey::NumberLiteral { value } => {
+                                    FluentValue::try_number(value)
+                                }
+                            };
+                            if key.matches(&selector, scope) {
+                                return variant.value.write(w, scope);
+                            }
+                        }
+                    }
+                    _ => {}
+                }
+
+                for variant in variants {
+                    if variant.default {
+                        return variant.value.write(w, scope);
+                    }
+                }
+                scope.add_error(ResolverError::MissingDefault);
+                Ok(())
+            }
+        }
+    }
+
+    fn write_error<W>(&self, w: &mut W) -> fmt::Result
+    where
+        W: fmt::Write,
+    {
+        match self {
+            Self::Inline(exp) => exp.write_error(w),
+            Self::Select { .. } => unreachable!(),
+        }
+    }
+}
diff --git a/vendor/fluent-bundle/src/resolver/inline_expression.rs b/vendor/fluent-bundle/src/resolver/inline_expression.rs
new file mode 100644
index 000000000..b9e89b6e8
--- /dev/null
+++ b/vendor/fluent-bundle/src/resolver/inline_expression.rs
@@ -0,0 +1,181 @@
+use super::scope::Scope;
+use super::{ResolveValue, ResolverError, WriteValue};
+
+use std::borrow::Borrow;
+use std::fmt;
+
+use fluent_syntax::ast;
+use fluent_syntax::unicode::{unescape_unicode, unescape_unicode_to_string};
+
+use crate::entry::GetEntry;
+use crate::memoizer::MemoizerKind;
+use crate::resource::FluentResource;
+use crate::types::FluentValue;
+
+impl<'p> WriteValue for ast::InlineExpression<&'p str> {
+    fn write<'scope, 'errors, W, R, M>(
+        &'scope self,
+        w: &mut W,
+        scope: &mut Scope<'scope, 'errors, R, M>,
+    ) -> fmt::Result
+    where
+        W: fmt::Write,
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        match self {
+            Self::StringLiteral { value } => unescape_unicode(w, value),
+            Self::MessageReference { id, attribute } => {
+                if let Some(msg) = scope.bundle.get_entry_message(id.name) {
+                    if let Some(attr) = attribute {
+                        msg.attributes
+                            .iter()
+                            .find_map(|a| {
+                                if a.id.name == attr.name {
+                                    Some(scope.track(w, &a.value, self))
+                                } else {
+                                    None
+                                }
+                            })
+                            .unwrap_or_else(|| scope.write_ref_error(w, self))
+                    } else {
+                        msg.value
+                            .as_ref()
+                            .map(|value| scope.track(w, value, self))
+                            .unwrap_or_else(|| {
+                                scope.add_error(ResolverError::NoValue(id.name.to_string()));
+                                w.write_char('{')?;
+                                self.write_error(w)?;
+                                w.write_char('}')
+                            })
+                    }
+                } else {
+                    scope.write_ref_error(w, self)
+                }
+            }
+            Self::NumberLiteral { value } => FluentValue::try_number(*value).write(w, scope),
+            Self::TermReference {
+                id,
+                attribute,
+                arguments,
+            } => {
+                let (_, resolved_named_args) = scope.get_arguments(arguments.as_ref());
+
+                scope.local_args = Some(resolved_named_args);
+                let result = scope
+                    .bundle
+                    .get_entry_term(id.name)
+                    .and_then(|term| {
+                        if let Some(attr) = attribute {
+                            term.attributes.iter().find_map(|a| {
+                                if a.id.name == attr.name {
+                                    Some(scope.track(w, &a.value, self))
+                                } else {
+                                    None
+                                }
+                            })
+                        } else {
+                            Some(scope.track(w, &term.value, self))
+                        }
+                    })
+                    .unwrap_or_else(|| scope.write_ref_error(w, self));
+                scope.local_args = None;
+                result
+            }
+            Self::FunctionReference { id, arguments } => {
+                let (resolved_positional_args, resolved_named_args) =
+                    scope.get_arguments(Some(arguments));
+
+                let func = scope.bundle.get_entry_function(id.name);
+
+                if let Some(func) = func {
+                    let result = func(resolved_positional_args.as_slice(), &resolved_named_args);
+                    if let FluentValue::Error = result {
+                        self.write_error(w)
+                    } else {
+                        w.write_str(&result.as_string(scope))
+                    }
+                } else {
+                    scope.write_ref_error(w, self)
+                }
+            }
+            Self::VariableReference { id } => {
+                let args = scope.local_args.as_ref().or(scope.args);
+
+                if let Some(arg) = args.and_then(|args| args.get(id.name)) {
+                    arg.write(w, scope)
+                } else {
+                    if scope.local_args.is_none() {
+                        scope.add_error(self.into());
+                    }
+                    w.write_char('{')?;
+                    self.write_error(w)?;
+                    w.write_char('}')
+                }
+            }
+            Self::Placeable { expression } => expression.write(w, scope),
+        }
+    }
+
+    fn write_error<W>(&self, w: &mut W) -> fmt::Result
+    where
+        W: fmt::Write,
+    {
+        match self {
+            Self::MessageReference {
+                id,
+                attribute: Some(attribute),
+            } => write!(w, "{}.{}", id.name, attribute.name),
+            Self::MessageReference {
+                id,
+                attribute: None,
+            } => w.write_str(id.name),
+            Self::TermReference {
+                id,
+                attribute: Some(attribute),
+                ..
+            } => write!(w, "-{}.{}", id.name, attribute.name),
+            Self::TermReference {
+                id,
+                attribute: None,
+                ..
+            } => write!(w, "-{}", id.name),
+            Self::FunctionReference { id, .. } => write!(w, "{}()", id.name),
+            Self::VariableReference { id } => write!(w, "${}", id.name),
+            _ => unreachable!(),
+        }
+    }
+}
+
+impl<'p> ResolveValue for ast::InlineExpression<&'p str> {
+    fn resolve<'source, 'errors, R, M>(
+        &'source self,
+        scope: &mut Scope<'source, 'errors, R, M>,
+    ) -> FluentValue<'source>
+    where
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        match self {
+            Self::StringLiteral { value } => unescape_unicode_to_string(value).into(),
+            Self::NumberLiteral { value } => FluentValue::try_number(*value),
+            Self::VariableReference { id } => {
+                let args = scope.local_args.as_ref().or(scope.args);
+
+                if let Some(arg) = args.and_then(|args| args.get(id.name)) {
+                    arg.clone()
+                } else {
+                    if scope.local_args.is_none() {
+                        scope.add_error(self.into());
+                    }
+                    FluentValue::Error
+                }
+            }
+            _ => {
+                let mut result = String::new();
+                self.write(&mut result, scope).expect("Failed to write");
+                result.into()
+            }
+        }
+    }
+}
diff --git a/vendor/fluent-bundle/src/resolver/mod.rs b/vendor/fluent-bundle/src/resolver/mod.rs
new file mode 100644
index 000000000..f137bcc91
--- /dev/null
+++ b/vendor/fluent-bundle/src/resolver/mod.rs
@@ -0,0 +1,42 @@
+pub mod errors;
+mod expression;
+mod inline_expression;
+mod pattern;
+mod scope;
+
+pub use errors::ResolverError;
+pub use scope::Scope;
+
+use std::borrow::Borrow;
+use std::fmt;
+
+use crate::memoizer::MemoizerKind;
+use crate::resource::FluentResource;
+use crate::types::FluentValue;
+
+// Converts an AST node to a `FluentValue`.
+pub(crate) trait ResolveValue {
+    fn resolve<'source, 'errors, R, M>(
+        &'source self,
+        scope: &mut Scope<'source, 'errors, R, M>,
+    ) -> FluentValue<'source>
+    where
+        R: Borrow<FluentResource>,
+        M: MemoizerKind;
+}
+
+pub(crate) trait WriteValue {
+    fn write<'source, 'errors, W, R, M>(
+        &'source self,
+        w: &mut W,
+        scope: &mut Scope<'source, 'errors, R, M>,
+    ) -> fmt::Result
+    where
+        W: fmt::Write,
+        R: Borrow<FluentResource>,
+        M: MemoizerKind;
+
+    fn write_error<W>(&self, _w: &mut W) -> fmt::Result
+    where
+        W: fmt::Write;
+}
diff --git a/vendor/fluent-bundle/src/resolver/pattern.rs b/vendor/fluent-bundle/src/resolver/pattern.rs
new file mode 100644
index 000000000..4e01d4ca4
--- /dev/null
+++ b/vendor/fluent-bundle/src/resolver/pattern.rs
@@ -0,0 +1,108 @@
+use super::scope::Scope;
+use super::{ResolverError, WriteValue};
+
+use std::borrow::Borrow;
+use std::fmt;
+
+use fluent_syntax::ast;
+
+use crate::memoizer::MemoizerKind;
+use crate::resolver::ResolveValue;
+use crate::resource::FluentResource;
+use crate::types::FluentValue;
+
+const MAX_PLACEABLES: u8 = 100;
+
+impl<'p> WriteValue for ast::Pattern<&'p str> {
+    fn write<'scope, 'errors, W, R, M>(
+        &'scope self,
+        w: &mut W,
+        scope: &mut Scope<'scope, 'errors, R, M>,
+    ) -> fmt::Result
+    where
+        W: fmt::Write,
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        let len = self.elements.len();
+
+        for elem in &self.elements {
+            if scope.dirty {
+                return Ok(());
+            }
+
+            match elem {
+                ast::PatternElement::TextElement { value } => {
+                    if let Some(ref transform) = scope.bundle.transform {
+                        w.write_str(&transform(value))?;
+                    } else {
+                        w.write_str(value)?;
+                    }
+                }
+                ast::PatternElement::Placeable { ref expression } => {
+                    scope.placeables += 1;
+                    if scope.placeables > MAX_PLACEABLES {
+                        scope.dirty = true;
+                        scope.add_error(ResolverError::TooManyPlaceables);
+                        return Ok(());
+                    }
+
+                    let needs_isolation = scope.bundle.use_isolating
+                        && len > 1
+                        && !matches!(
+                            expression,
+                            ast::Expression::Inline(ast::InlineExpression::MessageReference { .. },)
+                                | ast::Expression::Inline(
+                                    ast::InlineExpression::TermReference { .. },
+                                )
+                                | ast::Expression::Inline(
+                                    ast::InlineExpression::StringLiteral { .. },
+                                )
+                        );
+                    if needs_isolation {
+                        w.write_char('\u{2068}')?;
+                    }
+                    scope.maybe_track(w, self, expression)?;
+                    if needs_isolation {
+                        w.write_char('\u{2069}')?;
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
+
+    fn write_error<W>(&self, _w: &mut W) -> fmt::Result
+    where
+        W: fmt::Write,
+    {
+        unreachable!()
+    }
+}
+
+impl<'p> ResolveValue for ast::Pattern<&'p str> {
+    fn resolve<'source, 'errors, R, M>(
+        &'source self,
+        scope: &mut Scope<'source, 'errors, R, M>,
+    ) -> FluentValue<'source>
+    where
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        let len = self.elements.len();
+
+        if len == 1 {
+            if let ast::PatternElement::TextElement { value } = self.elements[0] {
+                return scope
+                    .bundle
+                    .transform
+                    .map_or_else(|| value.into(), |transform| transform(value).into());
+            }
+        }
+
+        let mut result = String::new();
+        self.write(&mut result, scope)
+            .expect("Failed to write to a string.");
+        result.into()
+    }
+}
diff --git a/vendor/fluent-bundle/src/resolver/scope.rs b/vendor/fluent-bundle/src/resolver/scope.rs
new file mode 100644
index 000000000..004701137
--- /dev/null
+++ b/vendor/fluent-bundle/src/resolver/scope.rs
@@ -0,0 +1,141 @@
+use crate::bundle::FluentBundle;
+use crate::memoizer::MemoizerKind;
+use crate::resolver::{ResolveValue, ResolverError, WriteValue};
+use crate::types::FluentValue;
+use crate::{FluentArgs, FluentError, FluentResource};
+use fluent_syntax::ast;
+use std::borrow::Borrow;
+use std::fmt;
+
+/// State for a single `ResolveValue::to_value` call.
+pub struct Scope<'scope, 'errors, R, M> {
+    /// The current `FluentBundle` instance.
+    pub bundle: &'scope FluentBundle<R, M>,
+    /// The current arguments passed by the developer.
+    pub(super) args: Option<&'scope FluentArgs<'scope>>,
+    /// Local args
+    pub(super) local_args: Option<FluentArgs<'scope>>,
+    /// The running count of resolved placeables. Used to detect the Billion
+    /// Laughs and Quadratic Blowup attacks.
+    pub(super) placeables: u8,
+    /// Tracks hashes to prevent infinite recursion.
+    travelled: smallvec::SmallVec<[&'scope ast::Pattern<&'scope str>; 2]>,
+    /// Track errors accumulated during resolving.
+    pub errors: Option<&'errors mut Vec<FluentError>>,
+    /// Makes the resolver bail.
+    pub dirty: bool,
+}
+
+impl<'scope, 'errors, R, M> Scope<'scope, 'errors, R, M> {
+    pub fn new(
+        bundle: &'scope FluentBundle<R, M>,
+        args: Option<&'scope FluentArgs>,
+        errors: Option<&'errors mut Vec<FluentError>>,
+    ) -> Self {
+        Scope {
+            bundle,
+            args,
+            local_args: None,
+            placeables: 0,
+            travelled: Default::default(),
+            errors,
+            dirty: false,
+        }
+    }
+
+    pub fn add_error(&mut self, error: ResolverError) {
+        if let Some(errors) = self.errors.as_mut() {
+            errors.push(error.into());
+        }
+    }
+
+    // This method allows us to lazily add Pattern on the stack,
+    // only if the Pattern::resolve has been called on an empty stack.
+    //
+    // This is the case when pattern is called from Bundle and it
+    // allows us to fast-path simple resolutions, and only use the stack
+    // for placeables.
+    pub fn maybe_track<W>(
+        &mut self,
+        w: &mut W,
+        pattern: &'scope ast::Pattern<&str>,
+        exp: &'scope ast::Expression<&str>,
+    ) -> fmt::Result
+    where
+        R: Borrow<FluentResource>,
+        W: fmt::Write,
+        M: MemoizerKind,
+    {
+        if self.travelled.is_empty() {
+            self.travelled.push(pattern);
+        }
+        exp.write(w, self)?;
+        if self.dirty {
+            w.write_char('{')?;
+            exp.write_error(w)?;
+            w.write_char('}')
+        } else {
+            Ok(())
+        }
+    }
+
+    pub fn track<W>(
+        &mut self,
+        w: &mut W,
+        pattern: &'scope ast::Pattern<&str>,
+        exp: &ast::InlineExpression<&str>,
+    ) -> fmt::Result
+    where
+        R: Borrow<FluentResource>,
+        W: fmt::Write,
+        M: MemoizerKind,
+    {
+        if self.travelled.contains(&pattern) {
+            self.add_error(ResolverError::Cyclic);
+            w.write_char('{')?;
+            exp.write_error(w)?;
+            w.write_char('}')
+        } else {
+            self.travelled.push(pattern);
+            let result = pattern.write(w, self);
+            self.travelled.pop();
+            result
+        }
+    }
+
+    pub fn write_ref_error<W>(
+        &mut self,
+        w: &mut W,
+        exp: &ast::InlineExpression<&str>,
+    ) -> fmt::Result
+    where
+        W: fmt::Write,
+    {
+        self.add_error(exp.into());
+        w.write_char('{')?;
+        exp.write_error(w)?;
+        w.write_char('}')
+    }
+
+    pub fn get_arguments(
+        &mut self,
+        arguments: Option<&'scope ast::CallArguments<&'scope str>>,
+    ) -> (Vec<FluentValue<'scope>>, FluentArgs<'scope>)
+    where
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        if let Some(ast::CallArguments { positional, named }) = arguments {
+            let positional = positional.iter().map(|expr| expr.resolve(self)).collect();
+
+            let named = named
+                .iter()
+                .map(|arg| (arg.name.name, arg.value.resolve(self)))
+                .collect();
+
+            (positional, named)
+        } else {
+            (Vec::new(), FluentArgs::new())
+        }
+    }
+}
diff --git a/vendor/fluent-bundle/src/resource.rs b/vendor/fluent-bundle/src/resource.rs
new file mode 100644
index 000000000..0c39c838f
--- /dev/null
+++ b/vendor/fluent-bundle/src/resource.rs
@@ -0,0 +1,171 @@
+use fluent_syntax::ast;
+use fluent_syntax::parser::{parse_runtime, ParserError};
+
+use self_cell::self_cell;
+
+type Resource<'s> = ast::Resource<&'s str>;
+
+self_cell!(
+    pub struct InnerFluentResource {
+        owner: String,
+
+        #[covariant]
+        dependent: Resource,
+    }
+
+    impl {Debug}
+);
+
+/// A resource containing a list of localization messages.
+///
+/// [`FluentResource`] wraps an [`Abstract Syntax Tree`](../fluent_syntax/ast/index.html) produced by the
+/// [`parser`](../fluent_syntax/parser/index.html) and provides an access to a list
+/// of its entries.
+///
+/// A good mental model for a resource is a single FTL file, but in the future
+/// there's nothing preventing a resource from being stored in a data base,
+/// pre-parsed format or in some other structured form.
+///
+/// # Example
+///
+/// ```
+/// use fluent_bundle::FluentResource;
+///
+/// let source = r#"
+///
+/// hello-world = Hello World!
+///
+/// "#;
+///
+/// let resource = FluentResource::try_new(source.to_string())
+///     .expect("Errors encountered while parsing a resource.");
+///
+/// assert_eq!(resource.entries().count(), 1);
+/// ```
+///
+/// # Ownership
+///
+/// A resource owns the source string and the AST contains references
+/// to the slices of the source.
+#[derive(Debug)]
+pub struct FluentResource(InnerFluentResource);
+
+impl FluentResource {
+    /// A fallible constructor of a new [`FluentResource`].
+    ///
+    /// It takes an encoded `Fluent Translation List` string, parses
+    /// it and stores both, the input string and the AST view of it,
+    /// for runtime use.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::FluentResource;
+    ///
+    /// let source = r#"
+    ///
+    /// hello-world = Hello, { $user }!
+    ///
+    /// "#;
+    ///
+    /// let resource = FluentResource::try_new(source.to_string());
+    ///
+    /// assert!(resource.is_ok());
+    /// ```
+    ///
+    /// # Errors
+    ///
+    /// The method will return the resource irrelevant of parse errors
+    /// encountered during parsing of the source, but in case of errors,
+    /// the `Err` variant will contain both the structure and a vector
+    /// of errors.
+    pub fn try_new(source: String) -> Result<Self, (Self, Vec<ParserError>)> {
+        let mut errors = None;
+
+        let res = InnerFluentResource::new(source, |source| match parse_runtime(source.as_str()) {
+            Ok(ast) => ast,
+            Err((ast, err)) => {
+                errors = Some(err);
+                ast
+            }
+        });
+
+        match errors {
+            None => Ok(Self(res)),
+            Some(err) => Err((Self(res), err)),
+        }
+    }
+
+    /// Returns a reference to the source string that was used
+    /// to construct the [`FluentResource`].
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::FluentResource;
+    ///
+    /// let source = "hello-world = Hello, { $user }!";
+    ///
+    /// let resource = FluentResource::try_new(source.to_string())
+    ///     .expect("Failed to parse FTL.");
+    ///
+    /// assert_eq!(
+    ///     resource.source(),
+    ///     "hello-world = Hello, { $user }!"
+    /// );
+    /// ```
+    pub fn source(&self) -> &str {
+        &self.0.borrow_owner()
+    }
+
+    /// Returns an iterator over [`entries`](fluent_syntax::ast::Entry) of the [`FluentResource`].
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::FluentResource;
+    /// use fluent_syntax::ast;
+    ///
+    /// let source = r#"
+    ///
+    /// hello-world = Hello, { $user }!
+    ///
+    /// "#;
+    ///
+    /// let resource = FluentResource::try_new(source.to_string())
+    ///     .expect("Failed to parse FTL.");
+    ///
+    /// assert_eq!(
+    ///     resource.entries().count(),
+    ///     1
+    /// );
+    /// assert!(matches!(resource.entries().next(), Some(ast::Entry::Message(_))));
+    /// ```
+    pub fn entries(&self) -> impl Iterator<Item = &ast::Entry<&str>> {
+        self.0.borrow_dependent().body.iter()
+    }
+
+    /// Returns an [`Entry`](fluent_syntax::ast::Entry) at the
+    /// given index out of the [`FluentResource`].
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use fluent_bundle::FluentResource;
+    /// use fluent_syntax::ast;
+    ///
+    /// let source = r#"
+    ///
+    /// hello-world = Hello, { $user }!
+    ///
+    /// "#;
+    ///
+    /// let resource = FluentResource::try_new(source.to_string())
+    ///     .expect("Failed to parse FTL.");
+    ///
+    /// assert!(matches!(resource.get_entry(0), Some(ast::Entry::Message(_))));
+    /// ```
+    pub fn get_entry(&self, idx: usize) -> Option<&ast::Entry<&str>> {
+        self.0.borrow_dependent().body.get(idx)
+    }
+}
diff --git a/vendor/fluent-bundle/src/types/mod.rs b/vendor/fluent-bundle/src/types/mod.rs
new file mode 100644
index 000000000..714fe4c76
--- /dev/null
+++ b/vendor/fluent-bundle/src/types/mod.rs
@@ -0,0 +1,202 @@
+//! `types` module contains types necessary for Fluent runtime
+//! value handling.
+//! The core struct is [`FluentValue`] which is a type that can be passed
+//! to the [`FluentBundle::format_pattern`](crate::bundle::FluentBundle) as an argument, it can be passed
+//! to any Fluent Function, and any function may return it.
+//!
+//! This part of functionality is not fully hashed out yet, since we're waiting
+//! for the internationalization APIs to mature, at which point all number
+//! formatting operations will be moved out of Fluent.
+//!
+//! For now, [`FluentValue`] can be a string, a number, or a custom [`FluentType`]
+//! which allows users of the library to implement their own types of values,
+//! such as dates, or more complex structures needed for their bindings.
+mod number;
+mod plural;
+
+pub use number::*;
+use plural::PluralRules;
+
+use std::any::Any;
+use std::borrow::{Borrow, Cow};
+use std::fmt;
+use std::str::FromStr;
+
+use intl_pluralrules::{PluralCategory, PluralRuleType};
+
+use crate::memoizer::MemoizerKind;
+use crate::resolver::Scope;
+use crate::resource::FluentResource;
+
+pub trait FluentType: fmt::Debug + AnyEq + 'static {
+    fn duplicate(&self) -> Box<dyn FluentType + Send>;
+    fn as_string(&self, intls: &intl_memoizer::IntlLangMemoizer) -> Cow<'static, str>;
+    fn as_string_threadsafe(
+        &self,
+        intls: &intl_memoizer::concurrent::IntlLangMemoizer,
+    ) -> Cow<'static, str>;
+}
+
+impl PartialEq for dyn FluentType + Send {
+    fn eq(&self, other: &Self) -> bool {
+        self.equals(other.as_any())
+    }
+}
+
+pub trait AnyEq: Any + 'static {
+    fn equals(&self, other: &dyn Any) -> bool;
+    fn as_any(&self) -> &dyn Any;
+}
+
+impl<T: Any + PartialEq> AnyEq for T {
+    fn equals(&self, other: &dyn Any) -> bool {
+        other
+            .downcast_ref::<Self>()
+            .map_or(false, |that| self == that)
+    }
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+}
+
+/// The `FluentValue` enum represents values which can be formatted to a String.
+///
+/// Those values are either passed as arguments to [`FluentBundle::format_pattern`][] or
+/// produced by functions, or generated in the process of pattern resolution.
+///
+/// [`FluentBundle::format_pattern`]: ../bundle/struct.FluentBundle.html#method.format_pattern
+#[derive(Debug)]
+pub enum FluentValue<'source> {
+    String(Cow<'source, str>),
+    Number(FluentNumber),
+    Custom(Box<dyn FluentType + Send>),
+    None,
+    Error,
+}
+
+impl<'s> PartialEq for FluentValue<'s> {
+    fn eq(&self, other: &Self) -> bool {
+        match (self, other) {
+            (FluentValue::String(s), FluentValue::String(s2)) => s == s2,
+            (FluentValue::Number(s), FluentValue::Number(s2)) => s == s2,
+            (FluentValue::Custom(s), FluentValue::Custom(s2)) => s == s2,
+            _ => false,
+        }
+    }
+}
+
+impl<'s> Clone for FluentValue<'s> {
+    fn clone(&self) -> Self {
+        match self {
+            FluentValue::String(s) => FluentValue::String(s.clone()),
+            FluentValue::Number(s) => FluentValue::Number(s.clone()),
+            FluentValue::Custom(s) => {
+                let new_value: Box<dyn FluentType + Send> = s.duplicate();
+                FluentValue::Custom(new_value)
+            }
+            FluentValue::Error => FluentValue::Error,
+            FluentValue::None => FluentValue::None,
+        }
+    }
+}
+
+impl<'source> FluentValue<'source> {
+    pub fn try_number<S: ToString>(v: S) -> Self {
+        let s = v.to_string();
+        if let Ok(num) = FluentNumber::from_str(&s) {
+            num.into()
+        } else {
+            s.into()
+        }
+    }
+
+    pub fn matches<R: Borrow<FluentResource>, M>(
+        &self,
+        other: &FluentValue,
+        scope: &Scope<R, M>,
+    ) -> bool
+    where
+        M: MemoizerKind,
+    {
+        match (self, other) {
+            (&FluentValue::String(ref a), &FluentValue::String(ref b)) => a == b,
+            (&FluentValue::Number(ref a), &FluentValue::Number(ref b)) => a == b,
+            (&FluentValue::String(ref a), &FluentValue::Number(ref b)) => {
+                let cat = match a.as_ref() {
+                    "zero" => PluralCategory::ZERO,
+                    "one" => PluralCategory::ONE,
+                    "two" => PluralCategory::TWO,
+                    "few" => PluralCategory::FEW,
+                    "many" => PluralCategory::MANY,
+                    "other" => PluralCategory::OTHER,
+                    _ => return false,
+                };
+                scope
+                    .bundle
+                    .intls
+                    .with_try_get_threadsafe::<PluralRules, _, _>(
+                        (PluralRuleType::CARDINAL,),
+                        |pr| pr.0.select(b) == Ok(cat),
+                    )
+                    .unwrap()
+            }
+            _ => false,
+        }
+    }
+
+    pub fn write<W, R, M>(&self, w: &mut W, scope: &Scope<R, M>) -> fmt::Result
+    where
+        W: fmt::Write,
+        R: Borrow<FluentResource>,
+        M: MemoizerKind,
+    {
+        if let Some(formatter) = &scope.bundle.formatter {
+            if let Some(val) = formatter(self, &scope.bundle.intls) {
+                return w.write_str(&val);
+            }
+        }
+        match self {
+            FluentValue::String(s) => w.write_str(s),
+            FluentValue::Number(n) => w.write_str(&n.as_string()),
+            FluentValue::Custom(s) => w.write_str(&scope.bundle.intls.stringify_value(&**s)),
+            FluentValue::Error => Ok(()),
+            FluentValue::None => Ok(()),
+        }
+    }
+
+    pub fn as_string<R: Borrow<FluentResource>, M>(&self, scope: &Scope<R, M>) -> Cow<'source, str>
+    where
+        M: MemoizerKind,
+    {
+        if let Some(formatter) = &scope.bundle.formatter {
+            if let Some(val) = formatter(self, &scope.bundle.intls) {
+                return val.into();
+            }
+        }
+        match self {
+            FluentValue::String(s) => s.clone(),
+            FluentValue::Number(n) => n.as_string(),
+            FluentValue::Custom(s) => scope.bundle.intls.stringify_value(&**s),
+            FluentValue::Error => "".into(),
+            FluentValue::None => "".into(),
+        }
+    }
+}
+
+impl<'source> From<String> for FluentValue<'source> {
+    fn from(s: String) -> Self {
+        FluentValue::String(s.into())
+    }
+}
+
+impl<'source> From<&'source str> for FluentValue<'source> {
+    fn from(s: &'source str) -> Self {
+        FluentValue::String(s.into())
+    }
+}
+
+impl<'source> From<Cow<'source, str>> for FluentValue<'source> {
+    fn from(s: Cow<'source, str>) -> Self {
+        FluentValue::String(s)
+    }
+}
diff --git a/vendor/fluent-bundle/src/types/number.rs b/vendor/fluent-bundle/src/types/number.rs
new file mode 100644
index 000000000..d39291ff4
--- /dev/null
+++ b/vendor/fluent-bundle/src/types/number.rs
@@ -0,0 +1,252 @@
+use std::borrow::Cow;
+use std::convert::TryInto;
+use std::default::Default;
+use std::str::FromStr;
+
+use intl_pluralrules::operands::PluralOperands;
+
+use crate::args::FluentArgs;
+use crate::types::FluentValue;
+
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+pub enum FluentNumberStyle {
+    Decimal,
+    Currency,
+    Percent,
+}
+
+impl std::default::Default for FluentNumberStyle {
+    fn default() -> Self {
+        Self::Decimal
+    }
+}
+
+impl From<&str> for FluentNumberStyle {
+    fn from(input: &str) -> Self {
+        match input {
+            "decimal" => Self::Decimal,
+            "currency" => Self::Currency,
+            "percent" => Self::Percent,
+            _ => Self::default(),
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+pub enum FluentNumberCurrencyDisplayStyle {
+    Symbol,
+    Code,
+    Name,
+}
+
+impl std::default::Default for FluentNumberCurrencyDisplayStyle {
+    fn default() -> Self {
+        Self::Symbol
+    }
+}
+
+impl From<&str> for FluentNumberCurrencyDisplayStyle {
+    fn from(input: &str) -> Self {
+        match input {
+            "symbol" => Self::Symbol,
+            "code" => Self::Code,
+            "name" => Self::Name,
+            _ => Self::default(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Hash, PartialEq, Eq)]
+pub struct FluentNumberOptions {
+    pub style: FluentNumberStyle,
+    pub currency: Option<String>,
+    pub currency_display: FluentNumberCurrencyDisplayStyle,
+    pub use_grouping: bool,
+    pub minimum_integer_digits: Option<usize>,
+    pub minimum_fraction_digits: Option<usize>,
+    pub maximum_fraction_digits: Option<usize>,
+    pub minimum_significant_digits: Option<usize>,
+    pub maximum_significant_digits: Option<usize>,
+}
+
+impl Default for FluentNumberOptions {
+    fn default() -> Self {
+        Self {
+            style: Default::default(),
+            currency: None,
+            currency_display: Default::default(),
+            use_grouping: true,
+            minimum_integer_digits: None,
+            minimum_fraction_digits: None,
+            maximum_fraction_digits: None,
+            minimum_significant_digits: None,
+            maximum_significant_digits: None,
+        }
+    }
+}
+
+impl FluentNumberOptions {
+    pub fn merge(&mut self, opts: &FluentArgs) {
+        for (key, value) in opts.iter() {
+            match (key, value) {
+                ("style", FluentValue::String(n)) => {
+                    self.style = n.as_ref().into();
+                }
+                ("currency", FluentValue::String(n)) => {
+                    self.currency = Some(n.to_string());
+                }
+                ("currencyDisplay", FluentValue::String(n)) => {
+                    self.currency_display = n.as_ref().into();
+                }
+                ("useGrouping", FluentValue::String(n)) => {
+                    self.use_grouping = n != "false";
+                }
+                ("minimumIntegerDigits", FluentValue::Number(n)) => {
+                    self.minimum_integer_digits = Some(n.into());
+                }
+                ("minimumFractionDigits", FluentValue::Number(n)) => {
+                    self.minimum_fraction_digits = Some(n.into());
+                }
+                ("maximumFractionDigits", FluentValue::Number(n)) => {
+                    self.maximum_fraction_digits = Some(n.into());
+                }
+                ("minimumSignificantDigits", FluentValue::Number(n)) => {
+                    self.minimum_significant_digits = Some(n.into());
+                }
+                ("maximumSignificantDigits", FluentValue::Number(n)) => {
+                    self.maximum_significant_digits = Some(n.into());
+                }
+                _ => {}
+            }
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Clone)]
+pub struct FluentNumber {
+    pub value: f64,
+    pub options: FluentNumberOptions,
+}
+
+impl FluentNumber {
+    pub const fn new(value: f64, options: FluentNumberOptions) -> Self {
+        Self { value, options }
+    }
+
+    pub fn as_string(&self) -> Cow<'static, str> {
+        let mut val = self.value.to_string();
+        if let Some(minfd) = self.options.minimum_fraction_digits {
+            if let Some(pos) = val.find('.') {
+                let frac_num = val.len() - pos - 1;
+                let missing = if frac_num > minfd {
+                    0
+                } else {
+                    minfd - frac_num
+                };
+                val = format!("{}{}", val, "0".repeat(missing));
+            } else {
+                val = format!("{}.{}", val, "0".repeat(minfd));
+            }
+        }
+        val.into()
+    }
+}
+
+impl FromStr for FluentNumber {
+    type Err = std::num::ParseFloatError;
+
+    fn from_str(input: &str) -> Result<Self, Self::Err> {
+        f64::from_str(input).map(|n| {
+            let mfd = input.find('.').map(|pos| input.len() - pos - 1);
+            let opts = FluentNumberOptions {
+                minimum_fraction_digits: mfd,
+                ..Default::default()
+            };
+            Self::new(n, opts)
+        })
+    }
+}
+
+impl<'l> From<FluentNumber> for FluentValue<'l> {
+    fn from(input: FluentNumber) -> Self {
+        FluentValue::Number(input)
+    }
+}
+
+macro_rules! from_num {
+    ($num:ty) => {
+        impl From<$num> for FluentNumber {
+            fn from(n: $num) -> Self {
+                Self {
+                    value: n as f64,
+                    options: FluentNumberOptions::default(),
+                }
+            }
+        }
+        impl From<&$num> for FluentNumber {
+            fn from(n: &$num) -> Self {
+                Self {
+                    value: *n as f64,
+                    options: FluentNumberOptions::default(),
+                }
+            }
+        }
+        impl From<FluentNumber> for $num {
+            fn from(input: FluentNumber) -> Self {
+                input.value as $num
+            }
+        }
+        impl From<&FluentNumber> for $num {
+            fn from(input: &FluentNumber) -> Self {
+                input.value as $num
+            }
+        }
+        impl From<$num> for FluentValue<'_> {
+            fn from(n: $num) -> Self {
+                FluentValue::Number(n.into())
+            }
+        }
+        impl From<&$num> for FluentValue<'_> {
+            fn from(n: &$num) -> Self {
+                FluentValue::Number(n.into())
+            }
+        }
+    };
+    ($($num:ty)+) => {
+        $(from_num!($num);)+
+    };
+}
+
+impl From<&FluentNumber> for PluralOperands {
+    fn from(input: &FluentNumber) -> Self {
+        let mut operands: Self = input
+            .value
+            .try_into()
+            .expect("Failed to generate operands out of FluentNumber");
+        if let Some(mfd) = input.options.minimum_fraction_digits {
+            if mfd > operands.v {
+                operands.f *= 10_u64.pow(mfd as u32 - operands.v as u32);
+                operands.v = mfd;
+            }
+        }
+        // XXX: Add support for other options.
+        operands
+    }
+}
+
+from_num!(i8 i16 i32 i64 i128 isize);
+from_num!(u8 u16 u32 u64 u128 usize);
+from_num!(f32 f64);
+
+#[cfg(test)]
+mod tests {
+    use crate::types::FluentValue;
+
+    #[test]
+    fn value_from_copy_ref() {
+        let x = 1i16;
+        let y = &x;
+        let z: FluentValue = y.into();
+        assert_eq!(z, FluentValue::try_number(1));
+    }
+}
diff --git a/vendor/fluent-bundle/src/types/plural.rs b/vendor/fluent-bundle/src/types/plural.rs
new file mode 100644
index 000000000..1151fd6d3
--- /dev/null
+++ b/vendor/fluent-bundle/src/types/plural.rs
@@ -0,0 +1,22 @@
+use fluent_langneg::{negotiate_languages, NegotiationStrategy};
+use intl_memoizer::Memoizable;
+use intl_pluralrules::{PluralRuleType, PluralRules as IntlPluralRules};
+use unic_langid::LanguageIdentifier;
+
+pub struct PluralRules(pub IntlPluralRules);
+
+impl Memoizable for PluralRules {
+    type Args = (PluralRuleType,);
+    type Error = &'static str;
+    fn construct(lang: LanguageIdentifier, args: Self::Args) -> Result<Self, Self::Error> {
+        let default_lang: LanguageIdentifier = "en".parse().unwrap();
+        let pr_lang = negotiate_languages(
+            &[lang],
+            &IntlPluralRules::get_locales(args.0),
+            Some(&default_lang),
+            NegotiationStrategy::Lookup,
+        )[0]
+        .clone();
+        Ok(Self(IntlPluralRules::create(pr_lang, args.0)?))
+    }
+}