Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 304 insertions, 0 deletions

diff --git a/vendor/serde_json/src/macros.rs b/vendor/serde_json/src/macros.rs
new file mode 100644
index 0000000..e8c6cd2
--- /dev/null
+++ b/vendor/serde_json/src/macros.rs
@@ -0,0 +1,304 @@
+/// Construct a `serde_json::Value` from a JSON literal.
+///
+/// ```
+/// # use serde_json::json;
+/// #
+/// let value = json!({
+///     "code": 200,
+///     "success": true,
+///     "payload": {
+///         "features": [
+///             "serde",
+///             "json"
+///         ],
+///         "homepage": null
+///     }
+/// });
+/// ```
+///
+/// Variables or expressions can be interpolated into the JSON literal. Any type
+/// interpolated into an array element or object value must implement Serde's
+/// `Serialize` trait, while any type interpolated into a object key must
+/// implement `Into<String>`. If the `Serialize` implementation of the
+/// interpolated type decides to fail, or if the interpolated type contains a
+/// map with non-string keys, the `json!` macro will panic.
+///
+/// ```
+/// # use serde_json::json;
+/// #
+/// let code = 200;
+/// let features = vec!["serde", "json"];
+///
+/// let value = json!({
+///     "code": code,
+///     "success": code == 200,
+///     "payload": {
+///         features[0]: features[1]
+///     }
+/// });
+/// ```
+///
+/// Trailing commas are allowed inside both arrays and objects.
+///
+/// ```
+/// # use serde_json::json;
+/// #
+/// let value = json!([
+///     "notice",
+///     "the",
+///     "trailing",
+///     "comma -->",
+/// ]);
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! json {
+    // Hide distracting implementation details from the generated rustdoc.
+    ($($json:tt)+) => {
+        json_internal!($($json)+)
+    };
+}
+
+// Rocket relies on this because they export their own `json!` with a different
+// doc comment than ours, and various Rust bugs prevent them from calling our
+// `json!` from their `json!` so they call `json_internal!` directly. Check with
+// @SergioBenitez before making breaking changes to this macro.
+//
+// Changes are fine as long as `json_internal!` does not call any new helper
+// macros and can still be invoked as `json_internal!($($json)+)`.
+#[macro_export(local_inner_macros)]
+#[doc(hidden)]
+macro_rules! json_internal {
+    //////////////////////////////////////////////////////////////////////////
+    // TT muncher for parsing the inside of an array [...]. Produces a vec![...]
+    // of the elements.
+    //
+    // Must be invoked as: json_internal!(@array [] $($tt)*)
+    //////////////////////////////////////////////////////////////////////////
+
+    // Done with trailing comma.
+    (@array [$($elems:expr,)*]) => {
+        json_internal_vec![$($elems,)*]
+    };
+
+    // Done without trailing comma.
+    (@array [$($elems:expr),*]) => {
+        json_internal_vec![$($elems),*]
+    };
+
+    // Next element is `null`.
+    (@array [$($elems:expr,)*] null $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)* json_internal!(null)] $($rest)*)
+    };
+
+    // Next element is `true`.
+    (@array [$($elems:expr,)*] true $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)* json_internal!(true)] $($rest)*)
+    };
+
+    // Next element is `false`.
+    (@array [$($elems:expr,)*] false $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)* json_internal!(false)] $($rest)*)
+    };
+
+    // Next element is an array.
+    (@array [$($elems:expr,)*] [$($array:tt)*] $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)* json_internal!([$($array)*])] $($rest)*)
+    };
+
+    // Next element is a map.
+    (@array [$($elems:expr,)*] {$($map:tt)*} $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)* json_internal!({$($map)*})] $($rest)*)
+    };
+
+    // Next element is an expression followed by comma.
+    (@array [$($elems:expr,)*] $next:expr, $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)* json_internal!($next),] $($rest)*)
+    };
+
+    // Last element is an expression with no trailing comma.
+    (@array [$($elems:expr,)*] $last:expr) => {
+        json_internal!(@array [$($elems,)* json_internal!($last)])
+    };
+
+    // Comma after the most recent element.
+    (@array [$($elems:expr),*] , $($rest:tt)*) => {
+        json_internal!(@array [$($elems,)*] $($rest)*)
+    };
+
+    // Unexpected token after most recent element.
+    (@array [$($elems:expr),*] $unexpected:tt $($rest:tt)*) => {
+        json_unexpected!($unexpected)
+    };
+
+    //////////////////////////////////////////////////////////////////////////
+    // TT muncher for parsing the inside of an object {...}. Each entry is
+    // inserted into the given map variable.
+    //
+    // Must be invoked as: json_internal!(@object $map () ($($tt)*) ($($tt)*))
+    //
+    // We require two copies of the input tokens so that we can match on one
+    // copy and trigger errors on the other copy.
+    //////////////////////////////////////////////////////////////////////////
+
+    // Done.
+    (@object $object:ident () () ()) => {};
+
+    // Insert the current entry followed by trailing comma.
+    (@object $object:ident [$($key:tt)+] ($value:expr) , $($rest:tt)*) => {
+        let _ = $object.insert(($($key)+).into(), $value);
+        json_internal!(@object $object () ($($rest)*) ($($rest)*));
+    };
+
+    // Current entry followed by unexpected token.
+    (@object $object:ident [$($key:tt)+] ($value:expr) $unexpected:tt $($rest:tt)*) => {
+        json_unexpected!($unexpected);
+    };
+
+    // Insert the last entry without trailing comma.
+    (@object $object:ident [$($key:tt)+] ($value:expr)) => {
+        let _ = $object.insert(($($key)+).into(), $value);
+    };
+
+    // Next value is `null`.
+    (@object $object:ident ($($key:tt)+) (: null $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!(null)) $($rest)*);
+    };
+
+    // Next value is `true`.
+    (@object $object:ident ($($key:tt)+) (: true $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!(true)) $($rest)*);
+    };
+
+    // Next value is `false`.
+    (@object $object:ident ($($key:tt)+) (: false $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!(false)) $($rest)*);
+    };
+
+    // Next value is an array.
+    (@object $object:ident ($($key:tt)+) (: [$($array:tt)*] $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!([$($array)*])) $($rest)*);
+    };
+
+    // Next value is a map.
+    (@object $object:ident ($($key:tt)+) (: {$($map:tt)*} $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!({$($map)*})) $($rest)*);
+    };
+
+    // Next value is an expression followed by comma.
+    (@object $object:ident ($($key:tt)+) (: $value:expr , $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!($value)) , $($rest)*);
+    };
+
+    // Last value is an expression with no trailing comma.
+    (@object $object:ident ($($key:tt)+) (: $value:expr) $copy:tt) => {
+        json_internal!(@object $object [$($key)+] (json_internal!($value)));
+    };
+
+    // Missing value for last entry. Trigger a reasonable error message.
+    (@object $object:ident ($($key:tt)+) (:) $copy:tt) => {
+        // "unexpected end of macro invocation"
+        json_internal!();
+    };
+
+    // Missing colon and value for last entry. Trigger a reasonable error
+    // message.
+    (@object $object:ident ($($key:tt)+) () $copy:tt) => {
+        // "unexpected end of macro invocation"
+        json_internal!();
+    };
+
+    // Misplaced colon. Trigger a reasonable error message.
+    (@object $object:ident () (: $($rest:tt)*) ($colon:tt $($copy:tt)*)) => {
+        // Takes no arguments so "no rules expected the token `:`".
+        json_unexpected!($colon);
+    };
+
+    // Found a comma inside a key. Trigger a reasonable error message.
+    (@object $object:ident ($($key:tt)*) (, $($rest:tt)*) ($comma:tt $($copy:tt)*)) => {
+        // Takes no arguments so "no rules expected the token `,`".
+        json_unexpected!($comma);
+    };
+
+    // Key is fully parenthesized. This avoids clippy double_parens false
+    // positives because the parenthesization may be necessary here.
+    (@object $object:ident () (($key:expr) : $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object ($key) (: $($rest)*) (: $($rest)*));
+    };
+
+    // Refuse to absorb colon token into key expression.
+    (@object $object:ident ($($key:tt)*) (: $($unexpected:tt)+) $copy:tt) => {
+        json_expect_expr_comma!($($unexpected)+);
+    };
+
+    // Munch a token into the current key.
+    (@object $object:ident ($($key:tt)*) ($tt:tt $($rest:tt)*) $copy:tt) => {
+        json_internal!(@object $object ($($key)* $tt) ($($rest)*) ($($rest)*));
+    };
+
+    //////////////////////////////////////////////////////////////////////////
+    // The main implementation.
+    //
+    // Must be invoked as: json_internal!($($json)+)
+    //////////////////////////////////////////////////////////////////////////
+
+    (null) => {
+        $crate::Value::Null
+    };
+
+    (true) => {
+        $crate::Value::Bool(true)
+    };
+
+    (false) => {
+        $crate::Value::Bool(false)
+    };
+
+    ([]) => {
+        $crate::Value::Array(json_internal_vec![])
+    };
+
+    ([ $($tt:tt)+ ]) => {
+        $crate::Value::Array(json_internal!(@array [] $($tt)+))
+    };
+
+    ({}) => {
+        $crate::Value::Object($crate::Map::new())
+    };
+
+    ({ $($tt:tt)+ }) => {
+        $crate::Value::Object({
+            let mut object = $crate::Map::new();
+            json_internal!(@object object () ($($tt)+) ($($tt)+));
+            object
+        })
+    };
+
+    // Any Serialize type: numbers, strings, struct literals, variables etc.
+    // Must be below every other rule.
+    ($other:expr) => {
+        $crate::to_value(&$other).unwrap()
+    };
+}
+
+// The json_internal macro above cannot invoke vec directly because it uses
+// local_inner_macros. A vec invocation there would resolve to $crate::vec.
+// Instead invoke vec here outside of local_inner_macros.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! json_internal_vec {
+    ($($content:tt)*) => {
+        vec![$($content)*]
+    };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! json_unexpected {
+    () => {};
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! json_expect_expr_comma {
+    ($e:expr , $($tt:tt)*) => {};
+}