Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 1012 insertions, 0 deletions

diff --git a/third_party/rust/clap/src/macros.rs b/third_party/rust/clap/src/macros.rs
new file mode 100644
index 0000000000..f50b854959
--- /dev/null
+++ b/third_party/rust/clap/src/macros.rs
@@ -0,0 +1,1012 @@
+/// Deprecated in [Issue #3087](https://github.com/clap-rs/clap/issues/3087), maybe [`clap::Parser`][crate::Parser] would fit your use case?
+#[cfg(feature = "yaml")]
+#[deprecated(
+    since = "3.0.0",
+    note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?"
+)]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! load_yaml {
+    ($yaml:expr) => {
+        &$crate::YamlLoader::load_from_str(include_str!($yaml)).expect("failed to load YAML file")
+            [0]
+    };
+}
+
+/// Deprecated, replaced with [`ArgMatches::value_of_t`][crate::ArgMatches::value_of_t]
+#[macro_export]
+#[deprecated(since = "3.0.0", note = "Replaced with `ArgMatches::value_of_t`")]
+#[doc(hidden)]
+macro_rules! value_t {
+    ($m:ident, $v:expr, $t:ty) => {
+        $crate::value_t!($m.value_of($v), $t)
+    };
+    ($m:ident.value_of($v:expr), $t:ty) => {
+        $m.value_of_t::<$t>($v)
+    };
+}
+
+/// Deprecated, replaced with [`ArgMatches::value_of_t_or_exit`][crate::ArgMatches::value_of_t_or_exit]
+#[macro_export]
+#[deprecated(
+    since = "3.0.0",
+    note = "Replaced with `ArgMatches::value_of_t_or_exit`"
+)]
+#[doc(hidden)]
+macro_rules! value_t_or_exit {
+    ($m:ident, $v:expr, $t:ty) => {
+        value_t_or_exit!($m.value_of($v), $t)
+    };
+    ($m:ident.value_of($v:expr), $t:ty) => {
+        $m.value_of_t_or_exit::<$t>($v)
+    };
+}
+
+/// Deprecated, replaced with [`ArgMatches::values_of_t`][crate::ArgMatches::value_of_t]
+#[macro_export]
+#[deprecated(since = "3.0.0", note = "Replaced with `ArgMatches::values_of_t`")]
+#[doc(hidden)]
+macro_rules! values_t {
+    ($m:ident, $v:expr, $t:ty) => {
+        values_t!($m.values_of($v), $t)
+    };
+    ($m:ident.values_of($v:expr), $t:ty) => {
+        $m.values_of_t::<$t>($v)
+    };
+}
+
+/// Deprecated, replaced with [`ArgMatches::values_of_t_or_exit`][crate::ArgMatches::value_of_t_or_exit]
+#[macro_export]
+#[deprecated(
+    since = "3.0.0",
+    note = "Replaced with `ArgMatches::values_of_t_or_exit`"
+)]
+#[doc(hidden)]
+macro_rules! values_t_or_exit {
+    ($m:ident, $v:expr, $t:ty) => {
+        values_t_or_exit!($m.values_of($v), $t)
+    };
+    ($m:ident.values_of($v:expr), $t:ty) => {
+        $m.values_of_t_or_exit::<$t>($v)
+    };
+}
+
+#[deprecated(since = "3.0.0", note = "Replaced with `ArgEnum`")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! _clap_count_exprs {
+    () => { 0 };
+    ($e:expr) => { 1 };
+    ($e:expr, $($es:expr),+) => { 1 + $crate::_clap_count_exprs!($($es),*) };
+}
+
+/// Deprecated, replaced with [`ArgEnum`][crate::ArgEnum]
+#[deprecated(since = "3.0.0", note = "Replaced with `ArgEnum`")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! arg_enum {
+    (@as_item $($i:item)*) => ($($i)*);
+    (@impls ( $($tts:tt)* ) -> ($e:ident, $($v:ident),+)) => {
+        $crate::arg_enum!(@as_item
+        $($tts)*
+
+        impl ::std::str::FromStr for $e {
+            type Err = String;
+
+            fn from_str(s: &str) -> ::std::result::Result<Self,Self::Err> {
+                #[allow(deprecated, unused_imports)]
+                use ::std::ascii::AsciiExt;
+                match s {
+                    $(stringify!($v) |
+                    _ if s.eq_ignore_ascii_case(stringify!($v)) => Ok($e::$v)),+,
+                    _ => Err({
+                        let v = vec![
+                            $(stringify!($v),)+
+                        ];
+                        format!("valid values: {}",
+                            v.join(", "))
+                    }),
+                }
+            }
+        }
+        impl ::std::fmt::Display for $e {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                match *self {
+                    $($e::$v => write!(f, stringify!($v)),)+
+                }
+            }
+        }
+        impl $e {
+            #[allow(dead_code)]
+            pub fn variants() -> [&'static str; $crate::_clap_count_exprs!($(stringify!($v)),+)] {
+                [
+                    $(stringify!($v),)+
+                ]
+            }
+        });
+    };
+    ($(#[$($m:meta),+])+ pub enum $e:ident { $($v:ident $(=$val:expr)*,)+ } ) => {
+        $crate::arg_enum!(@impls
+            ($(#[$($m),+])+
+            pub enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+    ($(#[$($m:meta),+])+ pub enum $e:ident { $($v:ident $(=$val:expr)*),+ } ) => {
+        $crate::arg_enum!(@impls
+            ($(#[$($m),+])+
+            pub enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+    ($(#[$($m:meta),+])+ enum $e:ident { $($v:ident $(=$val:expr)*,)+ } ) => {
+        $crate::arg_enum!(@impls
+            ($(#[$($m),+])+
+             enum $e {
+                 $($v$(=$val)*),+
+             }) -> ($e, $($v),+)
+        );
+    };
+    ($(#[$($m:meta),+])+ enum $e:ident { $($v:ident $(=$val:expr)*),+ } ) => {
+        $crate::arg_enum!(@impls
+            ($(#[$($m),+])+
+            enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+    (pub enum $e:ident { $($v:ident $(=$val:expr)*,)+ } ) => {
+        $crate::arg_enum!(@impls
+            (pub enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+    (pub enum $e:ident { $($v:ident $(=$val:expr)*),+ } ) => {
+        $crate::arg_enum!(@impls
+            (pub enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+    (enum $e:ident { $($v:ident $(=$val:expr)*,)+ } ) => {
+        $crate::arg_enum!(@impls
+            (enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+    (enum $e:ident { $($v:ident $(=$val:expr)*),+ } ) => {
+        $crate::arg_enum!(@impls
+            (enum $e {
+                $($v$(=$val)*),+
+            }) -> ($e, $($v),+)
+        );
+    };
+}
+
+/// Allows you to pull the version from your Cargo.toml at compile time as
+/// `MAJOR.MINOR.PATCH_PKGVERSION_PRE`
+///
+/// # Examples
+///
+/// ```no_run
+/// # #[macro_use]
+/// # extern crate clap;
+/// # use clap::Command;
+/// # fn main() {
+/// let m = Command::new("cmd")
+///             .version(crate_version!())
+///             .get_matches();
+/// # }
+/// ```
+#[cfg(feature = "cargo")]
+#[macro_export]
+macro_rules! crate_version {
+    () => {
+        env!("CARGO_PKG_VERSION")
+    };
+}
+
+/// Allows you to pull the authors for the command from your Cargo.toml at
+/// compile time in the form:
+/// `"author1 lastname <author1@example.com>:author2 lastname <author2@example.com>"`
+///
+/// You can replace the colons with a custom separator by supplying a
+/// replacement string, so, for example,
+/// `crate_authors!(",\n")` would become
+/// `"author1 lastname <author1@example.com>,\nauthor2 lastname <author2@example.com>,\nauthor3 lastname <author3@example.com>"`
+///
+/// # Examples
+///
+/// ```no_run
+/// # #[macro_use]
+/// # extern crate clap;
+/// # use clap::Command;
+/// # fn main() {
+/// let m = Command::new("cmd")
+///             .author(crate_authors!("\n"))
+///             .get_matches();
+/// # }
+/// ```
+#[cfg(feature = "cargo")]
+#[macro_export]
+macro_rules! crate_authors {
+    ($sep:expr) => {{
+        clap::lazy_static::lazy_static! {
+            static ref CACHED: String = env!("CARGO_PKG_AUTHORS").replace(':', $sep);
+        }
+
+        let s: &'static str = &*CACHED;
+        s
+    }};
+    () => {
+        env!("CARGO_PKG_AUTHORS")
+    };
+}
+
+/// Allows you to pull the description from your Cargo.toml at compile time.
+///
+/// # Examples
+///
+/// ```no_run
+/// # #[macro_use]
+/// # extern crate clap;
+/// # use clap::Command;
+/// # fn main() {
+/// let m = Command::new("cmd")
+///             .about(crate_description!())
+///             .get_matches();
+/// # }
+/// ```
+#[cfg(feature = "cargo")]
+#[macro_export]
+macro_rules! crate_description {
+    () => {
+        env!("CARGO_PKG_DESCRIPTION")
+    };
+}
+
+/// Allows you to pull the name from your Cargo.toml at compile time.
+///
+/// # Examples
+///
+/// ```no_run
+/// # #[macro_use]
+/// # extern crate clap;
+/// # use clap::Command;
+/// # fn main() {
+/// let m = Command::new(crate_name!())
+///             .get_matches();
+/// # }
+/// ```
+#[cfg(feature = "cargo")]
+#[macro_export]
+macro_rules! crate_name {
+    () => {
+        env!("CARGO_PKG_NAME")
+    };
+}
+
+/// Allows you to build the `Command` instance from your Cargo.toml at compile time.
+///
+/// **NOTE:** Changing the values in your `Cargo.toml` does not trigger a re-build automatically,
+/// and therefore won't change the generated output until you recompile.
+///
+/// In some cases you can "trick" the compiler into triggering a rebuild when your
+/// `Cargo.toml` is changed by including this in your `src/main.rs` file
+/// `include_str!("../Cargo.toml");`
+///
+/// # Examples
+///
+/// ```no_run
+/// # #[macro_use]
+/// # extern crate clap;
+/// # fn main() {
+/// let m = command!().get_matches();
+/// # }
+/// ```
+#[cfg(feature = "cargo")]
+#[macro_export]
+macro_rules! command {
+    () => {{
+        $crate::command!($crate::crate_name!())
+    }};
+    ($name:expr) => {{
+        let mut cmd = $crate::Command::new($name).version($crate::crate_version!());
+
+        let author = $crate::crate_authors!();
+        if !author.is_empty() {
+            cmd = cmd.author(author)
+        }
+
+        let about = $crate::crate_description!();
+        if !about.is_empty() {
+            cmd = cmd.about(about)
+        }
+
+        cmd
+    }};
+}
+
+/// Requires `cargo` feature flag to be enabled.
+#[cfg(not(feature = "cargo"))]
+#[macro_export]
+macro_rules! command {
+    () => {{
+        compile_error!("`cargo` feature flag is required");
+    }};
+    ($name:expr) => {{
+        compile_error!("`cargo` feature flag is required");
+    }};
+}
+
+/// Deprecated, replaced with [`clap::command!`][crate::command]
+#[cfg(feature = "cargo")]
+#[deprecated(since = "3.1.0", note = "Replaced with `clap::command!")]
+#[macro_export]
+macro_rules! app_from_crate {
+    () => {{
+        let mut cmd = $crate::Command::new($crate::crate_name!()).version($crate::crate_version!());
+
+        let author = $crate::crate_authors!(", ");
+        if !author.is_empty() {
+            cmd = cmd.author(author)
+        }
+
+        let about = $crate::crate_description!();
+        if !about.is_empty() {
+            cmd = cmd.about(about)
+        }
+
+        cmd
+    }};
+    ($sep:expr) => {{
+        let mut cmd = $crate::Command::new($crate::crate_name!()).version($crate::crate_version!());
+
+        let author = $crate::crate_authors!($sep);
+        if !author.is_empty() {
+            cmd = cmd.author(author)
+        }
+
+        let about = $crate::crate_description!();
+        if !about.is_empty() {
+            cmd = cmd.about(about)
+        }
+
+        cmd
+    }};
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! arg_impl {
+    ( @string $val:ident ) => {
+        stringify!($val)
+    };
+    ( @string $val:literal ) => {{
+        let ident_or_string_literal: &str = $val;
+        ident_or_string_literal
+    }};
+    ( @string $val:tt ) => {
+        ::std::compile_error!("Only identifiers or string literals supported");
+    };
+    ( @string ) => {
+        None
+    };
+
+    ( @char $val:ident ) => {{
+        let ident_or_char_literal = stringify!($val);
+        debug_assert_eq!(
+            ident_or_char_literal.len(),
+            1,
+            "Single-letter identifier expected, got {}",
+            ident_or_char_literal
+        );
+        ident_or_char_literal.chars().next().unwrap()
+    }};
+    ( @char $val:literal ) => {{
+        let ident_or_char_literal: char = $val;
+        ident_or_char_literal
+    }};
+    ( @char ) => {{
+        None
+    }};
+
+    (
+        @arg
+        ($arg:expr)
+        --$long:ident
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert_eq!($arg.get_value_names(), None, "Flags should precede values");
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Flags should precede `...`");
+
+                let mut arg = $arg;
+                let long = $crate::arg_impl! { @string $long };
+                if arg.get_id().is_empty() {
+                    arg = arg.id(long);
+                }
+                arg.long(long)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        --$long:literal
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert_eq!($arg.get_value_names(), None, "Flags should precede values");
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Flags should precede `...`");
+
+                let mut arg = $arg;
+                let long = $crate::arg_impl! { @string $long };
+                if arg.get_id().is_empty() {
+                    arg = arg.id(long);
+                }
+                arg.long(long)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        -$short:ident
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert_eq!($arg.get_long(), None, "Short flags should precede long flags");
+                debug_assert_eq!($arg.get_value_names(), None, "Flags should precede values");
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Flags should precede `...`");
+
+                $arg.short($crate::arg_impl! { @char $short })
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        -$short:literal
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert_eq!($arg.get_long(), None, "Short flags should precede long flags");
+                debug_assert_eq!($arg.get_value_names(), None, "Flags should precede values");
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Flags should precede `...`");
+
+                $arg.short($crate::arg_impl! { @char $short })
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        <$value_name:ident>
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Values should precede `...`");
+                debug_assert_eq!($arg.get_value_names(), None, "Multiple values not yet supported");
+
+                let mut arg = $arg;
+
+                arg = arg.required(true);
+                arg = arg.takes_value(true);
+
+                let value_name = $crate::arg_impl! { @string $value_name };
+                if arg.get_id().is_empty() {
+                    arg = arg.id(value_name);
+                }
+                arg.value_name(value_name)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        <$value_name:literal>
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Values should precede `...`");
+                debug_assert_eq!($arg.get_value_names(), None, "Multiple values not yet supported");
+
+                let mut arg = $arg;
+
+                arg = arg.required(true);
+                arg = arg.takes_value(true);
+
+                let value_name = $crate::arg_impl! { @string $value_name };
+                if arg.get_id().is_empty() {
+                    arg = arg.id(value_name);
+                }
+                arg.value_name(value_name)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        [$value_name:ident]
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Values should precede `...`");
+                debug_assert_eq!($arg.get_value_names(), None, "Multiple values not yet supported");
+
+                let mut arg = $arg;
+
+                if arg.get_long().is_none() && arg.get_short().is_none() {
+                    arg = arg.required(false);
+                } else {
+                    arg = arg.min_values(0).max_values(1);
+                }
+                arg = arg.takes_value(true);
+
+                let value_name = $crate::arg_impl! { @string $value_name };
+                if arg.get_id().is_empty() {
+                    arg = arg.id(value_name);
+                }
+                arg.value_name(value_name)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        [$value_name:literal]
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                debug_assert!(!$arg.is_multiple_occurrences_set(), "Values should precede `...`");
+                debug_assert_eq!($arg.get_value_names(), None, "Multiple values not yet supported");
+
+                let mut arg = $arg;
+
+                if arg.get_long().is_none() && arg.get_short().is_none() {
+                    arg = arg.required(false);
+                } else {
+                    arg = arg.min_values(0).max_values(1);
+                }
+                arg = arg.takes_value(true);
+
+                let value_name = $crate::arg_impl! { @string $value_name };
+                if arg.get_id().is_empty() {
+                    arg = arg.id(value_name);
+                }
+                arg.value_name(value_name)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        ...
+        $($tail:tt)*
+    ) => {
+        $crate::arg_impl! {
+            @arg
+            ({
+                $arg.multiple_occurrences(true)
+            })
+            $($tail)*
+        }
+    };
+    (
+        @arg
+        ($arg:expr)
+        $help:literal
+    ) => {
+        $arg.help($help)
+    };
+    (
+        @arg
+        ($arg:expr)
+    ) => {
+        $arg
+    };
+}
+
+/// Create an [`Arg`] from a usage string.
+///
+/// Allows creation of basic settings for the [`Arg`].
+///
+/// **NOTE**: Not all settings may be set using the usage string method. Some properties are
+/// only available via the builder pattern.
+///
+/// # Syntax
+///
+/// Usage strings typically following the form:
+///
+/// ```notrust
+/// [explicit name] [short] [long] [value names] [...] [help string]
+/// ```
+///
+/// ### Explicit Name
+///
+/// The name may be either a bare-word or a string, followed by a `:`, like `name:` or
+/// `"name":`.
+///
+/// *Note:* This is an optional field, if it's omitted the argument will use one of the additional
+/// fields as the name using the following priority order:
+///
+///  1. Explicit Name
+///  2. Long
+///  3. Value Name
+///
+/// See [`Arg::name`][crate::Arg::name].
+///
+/// ### Short
+///
+/// A short flag is a `-` followed by either a bare-character or quoted character, like `-f` or
+/// `-'f'`.
+///
+/// See [`Arg::short`][crate::Arg::short].
+///
+/// ### Long
+///
+/// A long flag is a `--` followed by either a bare-word or a string, like `--foo` or
+/// `--"foo"`.
+///
+/// See [`Arg::long`][crate::Arg::long].
+///
+/// ### Values (Value Notation)
+///
+/// This is set by placing bare-word between:
+/// - `[]` like `[FOO]`
+///   - Positional argument: optional
+///   - Named argument: optional value
+/// - `<>` like `<FOO>`: required
+///
+/// See [`Arg::value_name`][crate::Arg::value_name].
+///
+/// ### `...`
+///
+/// `...` (three consecutive dots/periods) specifies that this argument may occur multiple
+/// times (not to be confused with multiple values per occurrence).
+///
+/// See [`Arg::multiple_occurrences`][crate::Arg::multiple_occurrences].
+///
+/// ### Help String
+///
+/// The help string is denoted between a pair of double quotes `""` and may contain any
+/// characters.
+///
+/// # Examples
+///
+/// ```rust
+/// # use clap::{Command, Arg, arg};
+/// Command::new("prog")
+///     .args(&[
+///         arg!(--config <FILE> "a required file for the configuration and no short"),
+///         arg!(-d --debug ... "turns on debugging information and allows multiples"),
+///         arg!([input] "an optional input file to use")
+/// ])
+/// # ;
+/// ```
+/// [`Arg`]: ./struct.Arg.html
+#[macro_export]
+macro_rules! arg {
+    ( $name:ident: $($tail:tt)+ ) => {
+        $crate::arg_impl! {
+            @arg ($crate::Arg::new($crate::arg_impl! { @string $name })) $($tail)+
+        }
+    };
+    ( $($tail:tt)+ ) => {{
+        let arg = $crate::arg_impl! {
+            @arg ($crate::Arg::default()) $($tail)+
+        };
+        debug_assert!(!arg.get_id().is_empty(), "Without a value or long flag, the `name:` prefix is required");
+        arg
+    }};
+}
+
+/// Deprecated, replaced with [`clap::Parser`][crate::Parser] and [`clap::arg!`][crate::arg] (Issue clap-rs/clap#2835)
+#[deprecated(
+    since = "3.0.0",
+    note = "Replaced with `clap::Parser` for a declarative API (Issue clap-rs/clap#2835)"
+)]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! clap_app {
+    (@app ($builder:expr)) => { $builder };
+    (@app ($builder:expr) (@arg ($name:expr): $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($builder.arg(
+                $crate::clap_app!{ @arg ($crate::Arg::new($name)) (-) $($tail)* }))
+            $($tt)*
+        }
+    };
+    (@app ($builder:expr) (@arg $name:ident: $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($builder.arg(
+                $crate::clap_app!{ @arg ($crate::Arg::new(stringify!($name))) (-) $($tail)* }))
+            $($tt)*
+        }
+    };
+    (@app ($builder:expr) (@setting $setting:ident) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($builder.setting($crate::AppSettings::$setting))
+            $($tt)*
+        }
+    };
+// Treat the application builder as an argument to set its attributes
+    (@app ($builder:expr) (@attributes $($attr:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app ($crate::clap_app!{ @arg ($builder) $($attr)* }) $($tt)* }
+    };
+    (@app ($builder:expr) (@group $name:ident => $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($crate::clap_app!{ @group ($builder, $crate::ArgGroup::new(stringify!($name))) $($tail)* })
+            $($tt)*
+        }
+    };
+    (@app ($builder:expr) (@group $name:ident !$ident:ident => $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($crate::clap_app!{ @group ($builder, $crate::ArgGroup::new(stringify!($name)).$ident(false)) $($tail)* })
+            $($tt)*
+        }
+    };
+    (@app ($builder:expr) (@group $name:ident +$ident:ident => $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($crate::clap_app!{ @group ($builder, $crate::ArgGroup::new(stringify!($name)).$ident(true)) $($tail)* })
+            $($tt)*
+        }
+    };
+// Handle subcommand creation
+    (@app ($builder:expr) (@subcommand $name:ident => $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @app
+            ($builder.subcommand(
+                $crate::clap_app!{ @app ($crate::Command::new(stringify!($name))) $($tail)* }
+            ))
+            $($tt)*
+        }
+    };
+// Yaml like function calls - used for setting various meta directly against the app
+    (@app ($builder:expr) ($ident:ident: $($v:expr),*) $($tt:tt)*) => {
+// $crate::clap_app!{ @app ($builder.$ident($($v),*)) $($tt)* }
+        $crate::clap_app!{ @app
+            ($builder.$ident($($v),*))
+            $($tt)*
+        }
+    };
+
+// Add members to group and continue argument handling with the parent builder
+    (@group ($builder:expr, $group:expr)) => { $builder.group($group) };
+    // Treat the group builder as an argument to set its attributes
+    (@group ($builder:expr, $group:expr) (@attributes $($attr:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @group ($builder, $crate::clap_app!{ @arg ($group) (-) $($attr)* }) $($tt)* }
+    };
+    (@group ($builder:expr, $group:expr) (@arg $name:ident: $($tail:tt)*) $($tt:tt)*) => {
+        $crate::clap_app!{ @group
+            ($crate::clap_app!{ @app ($builder) (@arg $name: $($tail)*) },
+             $group.arg(stringify!($name)))
+            $($tt)*
+        }
+    };
+
+// No more tokens to munch
+    (@arg ($arg:expr) $modes:tt) => { $arg };
+// Shorthand tokens influenced by the usage_string
+    (@arg ($arg:expr) $modes:tt --($long:expr) $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.long($long)) $modes $($tail)* }
+    };
+    (@arg ($arg:expr) $modes:tt --$long:ident $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.long(stringify!($long))) $modes $($tail)* }
+    };
+    (@arg ($arg:expr) $modes:tt -$short:ident $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.short(stringify!($short).chars().next().unwrap())) $modes $($tail)* }
+    };
+    (@arg ($arg:expr) (-) <$var:ident> $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.value_name(stringify!($var))) (+) +takes_value +required $($tail)* }
+    };
+    (@arg ($arg:expr) (+) <$var:ident> $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.value_name(stringify!($var))) (+) $($tail)* }
+    };
+    (@arg ($arg:expr) (-) [$var:ident] $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.value_name(stringify!($var))) (+) +takes_value $($tail)* }
+    };
+    (@arg ($arg:expr) (+) [$var:ident] $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.value_name(stringify!($var))) (+) $($tail)* }
+    };
+    (@arg ($arg:expr) $modes:tt ... $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg) $modes +multiple +takes_value $($tail)* }
+    };
+// Shorthand magic
+    (@arg ($arg:expr) $modes:tt #{$n:expr, $m:expr} $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg) $modes min_values($n) max_values($m) $($tail)* }
+    };
+    (@arg ($arg:expr) $modes:tt * $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg) $modes +required $($tail)* }
+    };
+// !foo -> .foo(false)
+    (@arg ($arg:expr) $modes:tt !$ident:ident $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.$ident(false)) $modes $($tail)* }
+    };
+// +foo -> .foo(true)
+    (@arg ($arg:expr) $modes:tt +$ident:ident $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.$ident(true)) $modes $($tail)* }
+    };
+// Validator
+    (@arg ($arg:expr) $modes:tt {$fn_:expr} $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.validator($fn_)) $modes $($tail)* }
+    };
+    (@as_expr $expr:expr) => { $expr };
+// Help
+    (@arg ($arg:expr) $modes:tt $desc:tt) => { $arg.help($crate::clap_app!{ @as_expr $desc }) };
+// Handle functions that need to be called multiple times for each argument
+    (@arg ($arg:expr) $modes:tt $ident:ident[$($target:ident)*] $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg $( .$ident(stringify!($target)) )*) $modes $($tail)* }
+    };
+// Inherit builder's functions, e.g. `index(2)`, `requires_if("val", "arg")`
+    (@arg ($arg:expr) $modes:tt $ident:ident($($expr:expr),*) $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.$ident($($expr),*)) $modes $($tail)* }
+    };
+// Inherit builder's functions with trailing comma, e.g. `index(2,)`, `requires_if("val", "arg",)`
+    (@arg ($arg:expr) $modes:tt $ident:ident($($expr:expr,)*) $($tail:tt)*) => {
+        $crate::clap_app!{ @arg ($arg.$ident($($expr),*)) $modes $($tail)* }
+    };
+
+// Build a subcommand outside of an app.
+    (@subcommand $name:ident => $($tail:tt)*) => {
+        $crate::clap_app!{ @app ($crate::Command::new(stringify!($name))) $($tail)* }
+    };
+// Start the magic
+    (($name:expr) => $($tail:tt)*) => {{
+        $crate::clap_app!{ @app ($crate::Command::new($name)) $($tail)*}
+    }};
+
+    ($name:ident => $($tail:tt)*) => {{
+        $crate::clap_app!{ @app ($crate::Command::new(stringify!($name))) $($tail)*}
+    }};
+}
+
+macro_rules! impl_settings {
+    ($settings:ident, $flags:ident,
+        $(
+            $(#[$inner:ident $($args:tt)*])*
+            $setting:ident => $flag:path
+        ),+
+    ) => {
+        impl $flags {
+            #[allow(dead_code)]
+            pub(crate) fn empty() -> Self {
+                $flags(Flags::empty())
+            }
+
+            #[allow(dead_code)]
+            pub(crate) fn insert(&mut self, rhs: Self) {
+                self.0.insert(rhs.0);
+            }
+
+            #[allow(dead_code)]
+            pub(crate) fn remove(&mut self, rhs: Self) {
+                self.0.remove(rhs.0);
+            }
+
+            #[allow(dead_code)]
+            pub(crate) fn set(&mut self, s: $settings) {
+                #[allow(deprecated)]  // some Settings might be deprecated
+                match s {
+                    $(
+                        $(#[$inner $($args)*])*
+                        $settings::$setting => self.0.insert($flag),
+                    )*
+                }
+            }
+
+            #[allow(dead_code)]
+            pub(crate) fn unset(&mut self, s: $settings) {
+                #[allow(deprecated)]  // some Settings might be deprecated
+                match s {
+                    $(
+                        $(#[$inner $($args)*])*
+                        $settings::$setting => self.0.remove($flag),
+                    )*
+                }
+            }
+
+            #[allow(dead_code)]
+            pub(crate) fn is_set(&self, s: $settings) -> bool {
+                #[allow(deprecated)]  // some Settings might be deprecated
+                match s {
+                    $(
+                        $(#[$inner $($args)*])*
+                        $settings::$setting => self.0.contains($flag),
+                    )*
+                }
+            }
+        }
+
+        impl BitOr for $flags {
+            type Output = Self;
+
+            fn bitor(mut self, rhs: Self) -> Self::Output {
+                self.0.insert(rhs.0);
+                self
+            }
+        }
+
+        impl From<$settings> for $flags {
+            fn from(setting: $settings) -> Self {
+                let mut flags = $flags::empty();
+                flags.set(setting);
+                flags
+            }
+        }
+
+        impl BitOr<$settings> for $flags {
+            type Output = Self;
+
+            fn bitor(mut self, rhs: $settings) -> Self::Output {
+                self.set(rhs);
+                self
+            }
+        }
+
+        impl BitOr for $settings {
+            type Output = $flags;
+
+            fn bitor(self, rhs: Self) -> Self::Output {
+                let mut flags = $flags::empty();
+                flags.set(self);
+                flags.set(rhs);
+                flags
+            }
+        }
+    }
+}
+
+// Convenience for writing to stderr thanks to https://github.com/BurntSushi
+macro_rules! wlnerr {
+    ($($arg:tt)*) => ({
+        use std::io::{Write, stderr};
+        writeln!(&mut stderr(), $($arg)*).ok();
+    })
+}
+
+#[cfg(feature = "debug")]
+macro_rules! debug {
+    ($($arg:tt)*) => ({
+        let prefix = format!("[{:>w$}] \t", module_path!(), w = 28);
+        let body = format!($($arg)*);
+        let mut color = $crate::output::fmt::Colorizer::new($crate::output::fmt::Stream::Stderr, $crate::ColorChoice::Auto);
+        color.hint(prefix);
+        color.hint(body);
+        color.none("\n");
+        let _ = color.print();
+    })
+}
+
+#[cfg(not(feature = "debug"))]
+macro_rules! debug {
+    ($($arg:tt)*) => {};
+}