Adding upstream version 124.0.1.upstream/124.0.1

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

19 files changed, 1750 insertions, 0 deletions

diff --git a/third_party/rust/num-derive/.cargo-checksum.json b/third_party/rust/num-derive/.cargo-checksum.json
new file mode 100644
index 0000000000..22cbf847f3
--- /dev/null
+++ b/third_party/rust/num-derive/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"f332f5a9fab58d78a8e2be8ec8db83fe47436ef9225e73361f4f6596cb325c6c","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"6485b8ed310d3f0340bf1ad1f47645069ce4069dcc6bb46c7d5c6faf41de1fdb","README.md":"4087ceabb42281161bc074db61ad4d888343f159e60e49776559a179eda34193","RELEASES.md":"6270e75a054d3f14ae28f04abd27edb7ec41d67e131c4f1e798a3adb97aa4bc1","src/lib.rs":"724f81441d84672e684ca270cbfecddd741c8340a7e846ecf3cf6c9e9871349f","tests/empty_enum.rs":"1b2312ec2fc9866fce7172e71e0aa2efcc3cb9d7659d0b633eb352bb1e080d53","tests/issue-16.rs":"4a056b4a688805fc95f01642f016da6dadb46d1c67ceb82e5b5eaf9fe2db92cd","tests/issue-6.rs":"b7fbbe86ff82933c15ec09fabadca02d2c70e184af30b9887cae83ed2f60367e","tests/issue-9.rs":"4c87f70a63e56c24480028fafa39a845d127620141df21bc0abfa23f84ff9bb7","tests/newtype-2015.rs":"163f76f0c139c3621ba7416cec5f9fb966c86c5ebed270df77196cf75d62402f","tests/newtype-2018.rs":"ce5b005d805690b8200f6752d24a5ebe7d248703d0aa619489c6d821b3df4b9c","tests/newtype.rs":"bc1ff3fb3680935c2280cc91441c91ea104be24f525428987b49b86bc880217a","tests/num_derive_without_num.rs":"3ce528221a2cb752859e20c5423c4b474fec714b41d8c1b62f5614b165d7262b","tests/trivial-2015.rs":"1745e23dfafb8c717365e57d79323c61c7d4ceaa092d7399ed793fd4f2de8ff6","tests/trivial-2018.rs":"645f0ff3c3c0d014b6891bd310de2bc5f3ccb3019cb70d0b653061eb6571f7cf","tests/trivial.rs":"a6b0faab04527f6835f43cd72317a00065a7a6cf4c506d04e77f898134f7a59b","tests/with_custom_values.rs":"4f2ea85d1f987c6620efe5bda095477c3b669af3cb67f98935c5a7d59d28b339"},"package":"9e6a0fd4f737c707bd9086cc16c925f294943eb62eb71499e9fd4cf71f8b9f4e"}
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diff --git a/third_party/rust/num-derive/Cargo.toml b/third_party/rust/num-derive/Cargo.toml
new file mode 100644
index 0000000000..6ff605a52f
--- /dev/null
+++ b/third_party/rust/num-derive/Cargo.toml
@@ -0,0 +1,69 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2021"
+rust-version = "1.56.0"
+name = "num-derive"
+version = "0.4.0"
+authors = ["The Rust Project Developers"]
+exclude = [
+    "/bors.toml",
+    "/ci/*",
+    "/.github/*",
+]
+description = "Numeric syntax extensions"
+homepage = "https://github.com/rust-num/num-derive"
+documentation = "https://docs.rs/num-derive"
+readme = "README.md"
+keywords = [
+    "mathematics",
+    "numerics",
+]
+categories = ["science"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/rust-num/num-derive"
+
+[lib]
+name = "num_derive"
+test = false
+proc-macro = true
+
+[[test]]
+name = "newtype-2015"
+edition = "2015"
+
+[[test]]
+name = "newtype-2018"
+edition = "2018"
+
+[[test]]
+name = "trivial-2015"
+edition = "2015"
+
+[[test]]
+name = "trivial-2018"
+edition = "2018"
+
+[dependencies.proc-macro2]
+version = "1"
+
+[dependencies.quote]
+version = "1"
+
+[dependencies.syn]
+version = "2.0.5"
+
+[dev-dependencies.num]
+version = "0.4"
+
+[dev-dependencies.num-traits]
+version = "0.2"
diff --git a/third_party/rust/num-derive/LICENSE-APACHE b/third_party/rust/num-derive/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/third_party/rust/num-derive/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
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diff --git a/third_party/rust/num-derive/LICENSE-MIT b/third_party/rust/num-derive/LICENSE-MIT
new file mode 100644
index 0000000000..39d4bdb5ac
--- /dev/null
+++ b/third_party/rust/num-derive/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2014 The Rust Project Developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
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+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/num-derive/README.md b/third_party/rust/num-derive/README.md
new file mode 100644
index 0000000000..20d66a6334
--- /dev/null
+++ b/third_party/rust/num-derive/README.md
@@ -0,0 +1,69 @@
+# num-derive
+
+[![crate](https://img.shields.io/crates/v/num-derive.svg)](https://crates.io/crates/num-derive)
+[![documentation](https://docs.rs/num-derive/badge.svg)](https://docs.rs/num-derive)
+[![minimum rustc 1.56](https://img.shields.io/badge/rustc-1.56+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![build status](https://github.com/rust-num/num-derive/workflows/master/badge.svg)](https://github.com/rust-num/num-derive/actions)
+
+Procedural macros to derive numeric traits in Rust.
+
+## Usage
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+num-traits = "0.2"
+num-derive = "0.4"
+```
+
+and this to your crate root:
+
+```rust
+#[macro_use]
+extern crate num_derive;
+```
+
+Then you can derive traits on your own types:
+
+```rust
+#[derive(FromPrimitive, ToPrimitive)]
+enum Color {
+    Red,
+    Blue,
+    Green,
+}
+```
+
+## Optional features
+
+- **`full-syntax`** — Enables `num-derive` to handle enum discriminants
+  represented by complex expressions. Usually can be avoided by
+  [utilizing constants], so only use this feature if namespace pollution is
+  undesired and [compile time doubling] is acceptable.
+
+[utilizing constants]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359044704
+[compile time doubling]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359172588
+
+## Releases
+
+Release notes are available in [RELEASES.md](RELEASES.md).
+
+## Compatibility
+
+The `num-derive` crate is tested for rustc 1.56 and greater.
+
+## License
+
+Licensed under either of
+
+ * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [MIT license](http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/num-derive/RELEASES.md b/third_party/rust/num-derive/RELEASES.md
new file mode 100644
index 0000000000..fbb34da484
--- /dev/null
+++ b/third_party/rust/num-derive/RELEASES.md
@@ -0,0 +1,113 @@
+# Release 0.4.0 (2023-06-29)
+
+- [Update to syn-2][54] -- thanks @maurer!
+  - This raises the minimum supported rustc to 1.56.
+  - The "full-syntax" feature has also been removed.
+
+[54]: https://github.com/rust-num/num-derive/pull/54
+
+# Release 0.3.3 (2020-10-29)
+
+- [Make `NumOps` work with `no_std`][41] -- thanks @jedrzejboczar!
+
+[41]: https://github.com/rust-num/num-derive/pull/41
+
+# Release 0.3.2 (2020-08-24)
+
+- [Add `#[inline]` to all derived functions][40] -- thanks @Amanieu!
+
+[40]: https://github.com/rust-num/num-derive/pull/40
+
+# Release 0.3.1 (2020-07-28)
+
+- [Add `num_traits` proc_macro helper for explicit import][35] - thanks @jean-airoldie!
+- [Provide nicer parse errors and suggest "full-syntax"][39]
+
+[35]: https://github.com/rust-num/num-derive/pull/35
+[39]: https://github.com/rust-num/num-derive/pull/39
+
+# Release 0.3.0 (2019-09-27)
+
+- [Updated the `proc-macro2`, `quote`, and `syn` dependencies to 1.0][28],
+  which raises the minimum supported rustc to 1.31.
+
+[28]: https://github.com/rust-num/num-derive/pull/28
+
+# Release 0.2.5 (2019-04-23)
+
+- [Improved the masking of lints in derived code][23].
+
+[23]: https://github.com/rust-num/num-derive/pull/23
+
+# Release 0.2.4 (2019-01-25)
+
+- [Adjusted dependencies to allow no-std targets][22].
+
+[22]: https://github.com/rust-num/num-derive/pull/22
+
+# Release 0.2.3 (2018-10-03)
+
+- [Added newtype deriving][17] for `FromPrimitive`, `ToPrimitive`,
+  `NumOps<Self, Self>`, `NumCast`, `Zero`, `One`, `Num`, and `Float`.
+  Thanks @asayers!
+
+[17]: https://github.com/rust-num/num-derive/pull/17
+
+# Release 0.2.2 (2018-05-22)
+
+- [Updated dependencies][14].
+
+[14]: https://github.com/rust-num/num-derive/pull/14
+
+# Release 0.2.1 (2018-05-09)
+
+- [Updated dependencies][12] -- thanks @spearman!
+
+[12]: https://github.com/rust-num/num-derive/pull/12
+
+# Release 0.2.0 (2018-02-21)
+
+- [Discriminant matching is now simplified][10], casting values directly by
+  name, rather than trying to compute offsets from known values manually.
+- **breaking change**: [Derivations now import the traits from `num-traits`][11]
+  instead of the full `num` crate.  These are still compatible, but users need
+  to have an explicit `num-traits = "0.2"` dependency in their `Cargo.toml`.
+
+[10]: https://github.com/rust-num/num-derive/pull/10
+[11]: https://github.com/rust-num/num-derive/pull/11
+
+
+# Release 0.1.44 (2018-01-26)
+
+- [The derived code now explicitly allows `unused_qualifications`][9], so users
+  that globally deny that lint don't encounter an error.
+
+[9]: https://github.com/rust-num/num-derive/pull/9
+
+
+# Release 0.1.43 (2018-01-23)
+
+- [The derived code now explicitly allows `trivial_numeric_casts`][7], so users
+  that globally deny that lint don't encounter an error.
+
+[7]: https://github.com/rust-num/num-derive/pull/7
+
+
+# Release 0.1.42 (2018-01-22)
+
+- [num-derive now has its own source repository][num-356] at [rust-num/num-derive][home].
+- [The derivation macros have been updated][3] to using `syn` 0.12.  Support for complex
+  expressions in enum values can be enabled with the `full-syntax` feature.
+
+Thanks to @cuviper and @hcpl for their contributions!
+
+[home]: https://github.com/rust-num/num-derive
+[num-356]: https://github.com/rust-num/num/pull/356
+[3]: https://github.com/rust-num/num-derive/pull/3
+
+
+# Prior releases
+
+No prior release notes were kept.  Thanks all the same to the many
+contributors that have made this crate what it is!
+
diff --git a/third_party/rust/num-derive/src/lib.rs b/third_party/rust/num-derive/src/lib.rs
new file mode 100644
index 0000000000..26b9c77c21
--- /dev/null
+++ b/third_party/rust/num-derive/src/lib.rs
@@ -0,0 +1,954 @@
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![crate_type = "proc-macro"]
+#![doc(html_root_url = "https://docs.rs/num-derive/0.3")]
+#![recursion_limit = "512"]
+
+//! Procedural macros to derive numeric traits in Rust.
+//!
+//! ## Usage
+//!
+//! Add this to your `Cargo.toml`:
+//!
+//! ```toml
+//! [dependencies]
+//! num-traits = "0.2"
+//! num-derive = "0.3"
+//! ```
+//!
+//! Then you can derive traits on your own types:
+//!
+//! ```rust
+//! #[macro_use]
+//! extern crate num_derive;
+//!
+//! #[derive(FromPrimitive, ToPrimitive)]
+//! enum Color {
+//!     Red,
+//!     Blue,
+//!     Green,
+//! }
+//! # fn main() {}
+//! ```
+//!
+//! ## Explicit import
+//!
+//! By default the `num_derive` procedural macros assume that the
+//! `num_traits` crate is a direct dependency. If `num_traits` is instead
+//! a transitive dependency, the `num_traits` helper attribute can be
+//! used to tell `num_derive` to use a specific identifier for its imports.
+//!
+//! ```rust
+//! #[macro_use]
+//! extern crate num_derive;
+//! // Lets pretend this is a transitive dependency from another crate
+//! // reexported as `some_other_ident`.
+//! extern crate num_traits as some_other_ident;
+//!
+//! #[derive(FromPrimitive, ToPrimitive)]
+//! #[num_traits = "some_other_ident"]
+//! enum Color {
+//!     Red,
+//!     Blue,
+//!     Green,
+//! }
+//! # fn main() {}
+//! ```
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use proc_macro2::{Span, TokenStream as TokenStream2};
+use quote::quote;
+use syn::{Data, Fields, Ident};
+
+/// Try to parse the tokens, or else return a compilation error
+macro_rules! parse {
+    ($tokens:ident as $type:ty) => {
+        match syn::parse::<$type>($tokens) {
+            Ok(parsed) => parsed,
+            Err(error) => {
+                return TokenStream::from(error.to_compile_error());
+            }
+        }
+    };
+}
+
+// Within `exp`, you can bring things into scope with `extern crate`.
+//
+// We don't want to assume that `num_traits::` is in scope - the user may have imported it under a
+// different name, or may have imported it in a non-toplevel module (common when putting impls
+// behind a feature gate).
+//
+// Solution: let's just generate `extern crate num_traits as _num_traits` and then refer to
+// `_num_traits` in the derived code.  However, macros are not allowed to produce `extern crate`
+// statements at the toplevel.
+//
+// Solution: let's generate `mod _impl_foo` and import num_traits within that.  However, now we
+// lose access to private members of the surrounding module.  This is a problem if, for example,
+// we're deriving for a newtype, where the inner type is defined in the same module, but not
+// exported.
+//
+// Solution: use the dummy const trick.  For some reason, `extern crate` statements are allowed
+// here, but everything from the surrounding module is in scope.  This trick is taken from serde.
+fn dummy_const_trick(trait_: &str, name: &Ident, exp: TokenStream2) -> TokenStream2 {
+    let dummy_const = Ident::new(
+        &format!("_IMPL_NUM_{}_FOR_{}", trait_, unraw(name)),
+        Span::call_site(),
+    );
+    quote! {
+        #[allow(non_upper_case_globals, unused_qualifications)]
+        const #dummy_const: () = {
+            #[allow(clippy::useless_attribute)]
+            #[allow(rust_2018_idioms)]
+            extern crate num_traits as _num_traits;
+            #exp
+        };
+    }
+}
+
+fn unraw(ident: &Ident) -> String {
+    ident.to_string().trim_start_matches("r#").to_owned()
+}
+
+// If `data` is a newtype, return the type it's wrapping.
+fn newtype_inner(data: &syn::Data) -> Option<syn::Type> {
+    match *data {
+        Data::Struct(ref s) => {
+            match s.fields {
+                Fields::Unnamed(ref fs) => {
+                    if fs.unnamed.len() == 1 {
+                        Some(fs.unnamed[0].ty.clone())
+                    } else {
+                        None
+                    }
+                }
+                Fields::Named(ref fs) => {
+                    if fs.named.len() == 1 {
+                        panic!("num-derive doesn't know how to handle newtypes with named fields yet. \
+                           Please use a tuple-style newtype, or submit a PR!");
+                    }
+                    None
+                }
+                _ => None,
+            }
+        }
+        _ => None,
+    }
+}
+
+struct NumTraits {
+    import: Ident,
+    explicit: bool,
+}
+
+impl quote::ToTokens for NumTraits {
+    fn to_tokens(&self, tokens: &mut TokenStream2) {
+        self.import.to_tokens(tokens);
+    }
+}
+
+impl NumTraits {
+    fn new(ast: &syn::DeriveInput) -> Self {
+        // If there is a `num_traits` MetaNameValue attribute on the input,
+        // retrieve its value, and use it to create an `Ident` to be used
+        // to import the `num_traits` crate.
+        for attr in &ast.attrs {
+            if attr.path().is_ident("num_traits") {
+                if let Ok(syn::MetaNameValue {
+                    value:
+                        syn::Expr::Lit(syn::ExprLit {
+                            lit: syn::Lit::Str(ref lit_str),
+                            ..
+                        }),
+                    ..
+                }) = attr.meta.require_name_value()
+                {
+                    return NumTraits {
+                        import: syn::Ident::new(&lit_str.value(), lit_str.span()),
+                        explicit: true,
+                    };
+                } else {
+                    panic!("#[num_traits] attribute value must be a str");
+                }
+            }
+        }
+
+        // Otherwise, we'll implicitly import our own.
+        NumTraits {
+            import: Ident::new("_num_traits", Span::call_site()),
+            explicit: false,
+        }
+    }
+
+    fn wrap(&self, trait_: &str, name: &Ident, output: TokenStream2) -> TokenStream2 {
+        if self.explicit {
+            output
+        } else {
+            dummy_const_trick(trait_, &name, output)
+        }
+    }
+}
+
+/// Derives [`num_traits::FromPrimitive`][from] for simple enums and newtypes.
+///
+/// [from]: https://docs.rs/num-traits/0.2/num_traits/cast/trait.FromPrimitive.html
+///
+/// # Examples
+///
+/// Simple enums can be derived:
+///
+/// ```rust
+/// # #[macro_use]
+/// # extern crate num_derive;
+///
+/// #[derive(FromPrimitive)]
+/// enum Color {
+///     Red,
+///     Blue,
+///     Green = 42,
+/// }
+/// # fn main() {}
+/// ```
+///
+/// Enums that contain data are not allowed:
+///
+/// ```compile_fail
+/// # #[macro_use]
+/// # extern crate num_derive;
+///
+/// #[derive(FromPrimitive)]
+/// enum Color {
+///     Rgb(u8, u8, u8),
+///     Hsv(u8, u8, u8),
+/// }
+/// # fn main() {}
+/// ```
+///
+/// Structs are not allowed:
+///
+/// ```compile_fail
+/// # #[macro_use]
+/// # extern crate num_derive;
+/// #[derive(FromPrimitive)]
+/// struct Color {
+///     r: u8,
+///     g: u8,
+///     b: u8,
+/// }
+/// # fn main() {}
+/// ```
+#[proc_macro_derive(FromPrimitive, attributes(num_traits))]
+pub fn from_primitive(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = if let Some(inner_ty) = newtype_inner(&ast.data) {
+        quote! {
+            impl #import::FromPrimitive for #name {
+                #[inline]
+                fn from_i64(n: i64) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_i64(n).map(#name)
+                }
+                #[inline]
+                fn from_u64(n: u64) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_u64(n).map(#name)
+                }
+                #[inline]
+                fn from_isize(n: isize) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_isize(n).map(#name)
+                }
+                #[inline]
+                fn from_i8(n: i8) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_i8(n).map(#name)
+                }
+                #[inline]
+                fn from_i16(n: i16) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_i16(n).map(#name)
+                }
+                #[inline]
+                fn from_i32(n: i32) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_i32(n).map(#name)
+                }
+                #[inline]
+                fn from_i128(n: i128) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_i128(n).map(#name)
+                }
+                #[inline]
+                fn from_usize(n: usize) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_usize(n).map(#name)
+                }
+                #[inline]
+                fn from_u8(n: u8) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_u8(n).map(#name)
+                }
+                #[inline]
+                fn from_u16(n: u16) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_u16(n).map(#name)
+                }
+                #[inline]
+                fn from_u32(n: u32) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_u32(n).map(#name)
+                }
+                #[inline]
+                fn from_u128(n: u128) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_u128(n).map(#name)
+                }
+                #[inline]
+                fn from_f32(n: f32) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_f32(n).map(#name)
+                }
+                #[inline]
+                fn from_f64(n: f64) -> Option<Self> {
+                    <#inner_ty as #import::FromPrimitive>::from_f64(n).map(#name)
+                }
+            }
+        }
+    } else {
+        let variants = match ast.data {
+            Data::Enum(ref data_enum) => &data_enum.variants,
+            _ => panic!(
+                "`FromPrimitive` can be applied only to enums and newtypes, {} is neither",
+                name
+            ),
+        };
+
+        let from_i64_var = quote! { n };
+        let clauses: Vec<_> = variants
+            .iter()
+            .map(|variant| {
+                let ident = &variant.ident;
+                match variant.fields {
+                    Fields::Unit => (),
+                    _ => panic!(
+                        "`FromPrimitive` can be applied only to unitary enums and newtypes, \
+                         {}::{} is either struct or tuple",
+                        name, ident
+                    ),
+                }
+
+                quote! {
+                    if #from_i64_var == #name::#ident as i64 {
+                        Some(#name::#ident)
+                    }
+                }
+            })
+            .collect();
+
+        let from_i64_var = if clauses.is_empty() {
+            quote!(_)
+        } else {
+            from_i64_var
+        };
+
+        quote! {
+            impl #import::FromPrimitive for #name {
+                #[allow(trivial_numeric_casts)]
+                #[inline]
+                fn from_i64(#from_i64_var: i64) -> Option<Self> {
+                    #(#clauses else)* {
+                        None
+                    }
+                }
+
+                #[inline]
+                fn from_u64(n: u64) -> Option<Self> {
+                    Self::from_i64(n as i64)
+                }
+            }
+        }
+    };
+
+    import.wrap("FromPrimitive", &name, impl_).into()
+}
+
+/// Derives [`num_traits::ToPrimitive`][to] for simple enums and newtypes.
+///
+/// [to]: https://docs.rs/num-traits/0.2/num_traits/cast/trait.ToPrimitive.html
+///
+/// # Examples
+///
+/// Simple enums can be derived:
+///
+/// ```rust
+/// # #[macro_use]
+/// # extern crate num_derive;
+///
+/// #[derive(ToPrimitive)]
+/// enum Color {
+///     Red,
+///     Blue,
+///     Green = 42,
+/// }
+/// # fn main() {}
+/// ```
+///
+/// Enums that contain data are not allowed:
+///
+/// ```compile_fail
+/// # #[macro_use]
+/// # extern crate num_derive;
+///
+/// #[derive(ToPrimitive)]
+/// enum Color {
+///     Rgb(u8, u8, u8),
+///     Hsv(u8, u8, u8),
+/// }
+/// # fn main() {}
+/// ```
+///
+/// Structs are not allowed:
+///
+/// ```compile_fail
+/// # #[macro_use]
+/// # extern crate num_derive;
+/// #[derive(ToPrimitive)]
+/// struct Color {
+///     r: u8,
+///     g: u8,
+///     b: u8,
+/// }
+/// # fn main() {}
+/// ```
+#[proc_macro_derive(ToPrimitive, attributes(num_traits))]
+pub fn to_primitive(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = if let Some(inner_ty) = newtype_inner(&ast.data) {
+        quote! {
+            impl #import::ToPrimitive for #name {
+                #[inline]
+                fn to_i64(&self) -> Option<i64> {
+                    <#inner_ty as #import::ToPrimitive>::to_i64(&self.0)
+                }
+                #[inline]
+                fn to_u64(&self) -> Option<u64> {
+                    <#inner_ty as #import::ToPrimitive>::to_u64(&self.0)
+                }
+                #[inline]
+                fn to_isize(&self) -> Option<isize> {
+                    <#inner_ty as #import::ToPrimitive>::to_isize(&self.0)
+                }
+                #[inline]
+                fn to_i8(&self) -> Option<i8> {
+                    <#inner_ty as #import::ToPrimitive>::to_i8(&self.0)
+                }
+                #[inline]
+                fn to_i16(&self) -> Option<i16> {
+                    <#inner_ty as #import::ToPrimitive>::to_i16(&self.0)
+                }
+                #[inline]
+                fn to_i32(&self) -> Option<i32> {
+                    <#inner_ty as #import::ToPrimitive>::to_i32(&self.0)
+                }
+                #[inline]
+                fn to_i128(&self) -> Option<i128> {
+                    <#inner_ty as #import::ToPrimitive>::to_i128(&self.0)
+                }
+                #[inline]
+                fn to_usize(&self) -> Option<usize> {
+                    <#inner_ty as #import::ToPrimitive>::to_usize(&self.0)
+                }
+                #[inline]
+                fn to_u8(&self) -> Option<u8> {
+                    <#inner_ty as #import::ToPrimitive>::to_u8(&self.0)
+                }
+                #[inline]
+                fn to_u16(&self) -> Option<u16> {
+                    <#inner_ty as #import::ToPrimitive>::to_u16(&self.0)
+                }
+                #[inline]
+                fn to_u32(&self) -> Option<u32> {
+                    <#inner_ty as #import::ToPrimitive>::to_u32(&self.0)
+                }
+                #[inline]
+                fn to_u128(&self) -> Option<u128> {
+                    <#inner_ty as #import::ToPrimitive>::to_u128(&self.0)
+                }
+                #[inline]
+                fn to_f32(&self) -> Option<f32> {
+                    <#inner_ty as #import::ToPrimitive>::to_f32(&self.0)
+                }
+                #[inline]
+                fn to_f64(&self) -> Option<f64> {
+                    <#inner_ty as #import::ToPrimitive>::to_f64(&self.0)
+                }
+            }
+        }
+    } else {
+        let variants = match ast.data {
+            Data::Enum(ref data_enum) => &data_enum.variants,
+            _ => panic!(
+                "`ToPrimitive` can be applied only to enums and newtypes, {} is neither",
+                name
+            ),
+        };
+
+        let variants: Vec<_> = variants
+            .iter()
+            .map(|variant| {
+                let ident = &variant.ident;
+                match variant.fields {
+                    Fields::Unit => (),
+                    _ => {
+                        panic!("`ToPrimitive` can be applied only to unitary enums and newtypes, {}::{} is either struct or tuple", name, ident)
+                    },
+                }
+
+                // NB: We have to check each variant individually, because we'll only have `&self`
+                // for the input.  We can't move from that, and it might not be `Clone` or `Copy`.
+                // (Otherwise we could just do `*self as i64` without a `match` at all.)
+                quote!(#name::#ident => #name::#ident as i64)
+            })
+            .collect();
+
+        let match_expr = if variants.is_empty() {
+            // No variants found, so do not use Some to not to trigger `unreachable_code` lint
+            quote! {
+                match *self {}
+            }
+        } else {
+            quote! {
+                Some(match *self {
+                    #(#variants,)*
+                })
+            }
+        };
+
+        quote! {
+            impl #import::ToPrimitive for #name {
+                #[inline]
+                #[allow(trivial_numeric_casts)]
+                fn to_i64(&self) -> Option<i64> {
+                    #match_expr
+                }
+
+                #[inline]
+                fn to_u64(&self) -> Option<u64> {
+                    self.to_i64().map(|x| x as u64)
+                }
+            }
+        }
+    };
+
+    import.wrap("ToPrimitive", &name, impl_).into()
+}
+
+const NEWTYPE_ONLY: &str = "This trait can only be derived for newtypes";
+
+/// Derives [`num_traits::NumOps`][num_ops] for newtypes.  The inner type must already implement
+/// `NumOps`.
+///
+/// [num_ops]: https://docs.rs/num-traits/0.2/num_traits/trait.NumOps.html
+///
+/// Note that, since `NumOps` is really a trait alias for `Add + Sub + Mul + Div + Rem`, this macro
+/// generates impls for _those_ traits.  Furthermore, in all generated impls, `RHS=Self` and
+/// `Output=Self`.
+#[proc_macro_derive(NumOps)]
+pub fn num_ops(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+    let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY);
+    let impl_ = quote! {
+        impl ::core::ops::Add for #name {
+            type Output = Self;
+            #[inline]
+            fn add(self, other: Self) -> Self {
+                #name(<#inner_ty as ::core::ops::Add>::add(self.0, other.0))
+            }
+        }
+        impl ::core::ops::Sub for #name {
+            type Output = Self;
+            #[inline]
+            fn sub(self, other: Self) -> Self {
+                #name(<#inner_ty as ::core::ops::Sub>::sub(self.0, other.0))
+            }
+        }
+        impl ::core::ops::Mul for #name {
+            type Output = Self;
+            #[inline]
+            fn mul(self, other: Self) -> Self {
+                #name(<#inner_ty as ::core::ops::Mul>::mul(self.0, other.0))
+            }
+        }
+        impl ::core::ops::Div for #name {
+            type Output = Self;
+            #[inline]
+            fn div(self, other: Self) -> Self {
+                #name(<#inner_ty as ::core::ops::Div>::div(self.0, other.0))
+            }
+        }
+        impl ::core::ops::Rem for #name {
+            type Output = Self;
+            #[inline]
+            fn rem(self, other: Self) -> Self {
+                #name(<#inner_ty as ::core::ops::Rem>::rem(self.0, other.0))
+            }
+        }
+    };
+    impl_.into()
+}
+
+/// Derives [`num_traits::NumCast`][num_cast] for newtypes.  The inner type must already implement
+/// `NumCast`.
+///
+/// [num_cast]: https://docs.rs/num-traits/0.2/num_traits/cast/trait.NumCast.html
+#[proc_macro_derive(NumCast, attributes(num_traits))]
+pub fn num_cast(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+    let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY);
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = quote! {
+        impl #import::NumCast for #name {
+            #[inline]
+            fn from<T: #import::ToPrimitive>(n: T) -> Option<Self> {
+                <#inner_ty as #import::NumCast>::from(n).map(#name)
+            }
+        }
+    };
+
+    import.wrap("NumCast", &name, impl_).into()
+}
+
+/// Derives [`num_traits::Zero`][zero] for newtypes.  The inner type must already implement `Zero`.
+///
+/// [zero]: https://docs.rs/num-traits/0.2/num_traits/identities/trait.Zero.html
+#[proc_macro_derive(Zero, attributes(num_traits))]
+pub fn zero(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+    let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY);
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = quote! {
+        impl #import::Zero for #name {
+            #[inline]
+            fn zero() -> Self {
+                #name(<#inner_ty as #import::Zero>::zero())
+            }
+            #[inline]
+            fn is_zero(&self) -> bool {
+                <#inner_ty as #import::Zero>::is_zero(&self.0)
+            }
+        }
+    };
+
+    import.wrap("Zero", &name, impl_).into()
+}
+
+/// Derives [`num_traits::One`][one] for newtypes.  The inner type must already implement `One`.
+///
+/// [one]: https://docs.rs/num-traits/0.2/num_traits/identities/trait.One.html
+#[proc_macro_derive(One, attributes(num_traits))]
+pub fn one(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+    let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY);
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = quote! {
+        impl #import::One for #name {
+            #[inline]
+            fn one() -> Self {
+                #name(<#inner_ty as #import::One>::one())
+            }
+            #[inline]
+            fn is_one(&self) -> bool {
+                <#inner_ty as #import::One>::is_one(&self.0)
+            }
+        }
+    };
+
+    import.wrap("One", &name, impl_).into()
+}
+
+/// Derives [`num_traits::Num`][num] for newtypes.  The inner type must already implement `Num`.
+///
+/// [num]: https://docs.rs/num-traits/0.2/num_traits/trait.Num.html
+#[proc_macro_derive(Num, attributes(num_traits))]
+pub fn num(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+    let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY);
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = quote! {
+        impl #import::Num for #name {
+            type FromStrRadixErr = <#inner_ty as #import::Num>::FromStrRadixErr;
+            #[inline]
+            fn from_str_radix(s: &str, radix: u32) -> Result<Self, Self::FromStrRadixErr> {
+                <#inner_ty as #import::Num>::from_str_radix(s, radix).map(#name)
+            }
+        }
+    };
+
+    import.wrap("Num", &name, impl_).into()
+}
+
+/// Derives [`num_traits::Float`][float] for newtypes.  The inner type must already implement
+/// `Float`.
+///
+/// [float]: https://docs.rs/num-traits/0.2/num_traits/float/trait.Float.html
+#[proc_macro_derive(Float, attributes(num_traits))]
+pub fn float(input: TokenStream) -> TokenStream {
+    let ast = parse!(input as syn::DeriveInput);
+    let name = &ast.ident;
+    let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY);
+
+    let import = NumTraits::new(&ast);
+
+    let impl_ = quote! {
+        impl #import::Float for #name {
+            #[inline]
+            fn nan() -> Self {
+                #name(<#inner_ty as #import::Float>::nan())
+            }
+            #[inline]
+            fn infinity() -> Self {
+                #name(<#inner_ty as #import::Float>::infinity())
+            }
+            #[inline]
+            fn neg_infinity() -> Self {
+                #name(<#inner_ty as #import::Float>::neg_infinity())
+            }
+            #[inline]
+            fn neg_zero() -> Self {
+                #name(<#inner_ty as #import::Float>::neg_zero())
+            }
+            #[inline]
+            fn min_value() -> Self {
+                #name(<#inner_ty as #import::Float>::min_value())
+            }
+            #[inline]
+            fn min_positive_value() -> Self {
+                #name(<#inner_ty as #import::Float>::min_positive_value())
+            }
+            #[inline]
+            fn max_value() -> Self {
+                #name(<#inner_ty as #import::Float>::max_value())
+            }
+            #[inline]
+            fn is_nan(self) -> bool {
+                <#inner_ty as #import::Float>::is_nan(self.0)
+            }
+            #[inline]
+            fn is_infinite(self) -> bool {
+                <#inner_ty as #import::Float>::is_infinite(self.0)
+            }
+            #[inline]
+            fn is_finite(self) -> bool {
+                <#inner_ty as #import::Float>::is_finite(self.0)
+            }
+            #[inline]
+            fn is_normal(self) -> bool {
+                <#inner_ty as #import::Float>::is_normal(self.0)
+            }
+            #[inline]
+            fn classify(self) -> ::std::num::FpCategory {
+                <#inner_ty as #import::Float>::classify(self.0)
+            }
+            #[inline]
+            fn floor(self) -> Self {
+                #name(<#inner_ty as #import::Float>::floor(self.0))
+            }
+            #[inline]
+            fn ceil(self) -> Self {
+                #name(<#inner_ty as #import::Float>::ceil(self.0))
+            }
+            #[inline]
+            fn round(self) -> Self {
+                #name(<#inner_ty as #import::Float>::round(self.0))
+            }
+            #[inline]
+            fn trunc(self) -> Self {
+                #name(<#inner_ty as #import::Float>::trunc(self.0))
+            }
+            #[inline]
+            fn fract(self) -> Self {
+                #name(<#inner_ty as #import::Float>::fract(self.0))
+            }
+            #[inline]
+            fn abs(self) -> Self {
+                #name(<#inner_ty as #import::Float>::abs(self.0))
+            }
+            #[inline]
+            fn signum(self) -> Self {
+                #name(<#inner_ty as #import::Float>::signum(self.0))
+            }
+            #[inline]
+            fn is_sign_positive(self) -> bool {
+                <#inner_ty as #import::Float>::is_sign_positive(self.0)
+            }
+            #[inline]
+            fn is_sign_negative(self) -> bool {
+                <#inner_ty as #import::Float>::is_sign_negative(self.0)
+            }
+            #[inline]
+            fn mul_add(self, a: Self, b: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::mul_add(self.0, a.0, b.0))
+            }
+            #[inline]
+            fn recip(self) -> Self {
+                #name(<#inner_ty as #import::Float>::recip(self.0))
+            }
+            #[inline]
+            fn powi(self, n: i32) -> Self {
+                #name(<#inner_ty as #import::Float>::powi(self.0, n))
+            }
+            #[inline]
+            fn powf(self, n: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::powf(self.0, n.0))
+            }
+            #[inline]
+            fn sqrt(self) -> Self {
+                #name(<#inner_ty as #import::Float>::sqrt(self.0))
+            }
+            #[inline]
+            fn exp(self) -> Self {
+                #name(<#inner_ty as #import::Float>::exp(self.0))
+            }
+            #[inline]
+            fn exp2(self) -> Self {
+                #name(<#inner_ty as #import::Float>::exp2(self.0))
+            }
+            #[inline]
+            fn ln(self) -> Self {
+                #name(<#inner_ty as #import::Float>::ln(self.0))
+            }
+            #[inline]
+            fn log(self, base: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::log(self.0, base.0))
+            }
+            #[inline]
+            fn log2(self) -> Self {
+                #name(<#inner_ty as #import::Float>::log2(self.0))
+            }
+            #[inline]
+            fn log10(self) -> Self {
+                #name(<#inner_ty as #import::Float>::log10(self.0))
+            }
+            #[inline]
+            fn max(self, other: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::max(self.0, other.0))
+            }
+            #[inline]
+            fn min(self, other: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::min(self.0, other.0))
+            }
+            #[inline]
+            fn abs_sub(self, other: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::abs_sub(self.0, other.0))
+            }
+            #[inline]
+            fn cbrt(self) -> Self {
+                #name(<#inner_ty as #import::Float>::cbrt(self.0))
+            }
+            #[inline]
+            fn hypot(self, other: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::hypot(self.0, other.0))
+            }
+            #[inline]
+            fn sin(self) -> Self {
+                #name(<#inner_ty as #import::Float>::sin(self.0))
+            }
+            #[inline]
+            fn cos(self) -> Self {
+                #name(<#inner_ty as #import::Float>::cos(self.0))
+            }
+            #[inline]
+            fn tan(self) -> Self {
+                #name(<#inner_ty as #import::Float>::tan(self.0))
+            }
+            #[inline]
+            fn asin(self) -> Self {
+                #name(<#inner_ty as #import::Float>::asin(self.0))
+            }
+            #[inline]
+            fn acos(self) -> Self {
+                #name(<#inner_ty as #import::Float>::acos(self.0))
+            }
+            #[inline]
+            fn atan(self) -> Self {
+                #name(<#inner_ty as #import::Float>::atan(self.0))
+            }
+            #[inline]
+            fn atan2(self, other: Self) -> Self {
+                #name(<#inner_ty as #import::Float>::atan2(self.0, other.0))
+            }
+            #[inline]
+            fn sin_cos(self) -> (Self, Self) {
+                let (x, y) = <#inner_ty as #import::Float>::sin_cos(self.0);
+                (#name(x), #name(y))
+            }
+            #[inline]
+            fn exp_m1(self) -> Self {
+                #name(<#inner_ty as #import::Float>::exp_m1(self.0))
+            }
+            #[inline]
+            fn ln_1p(self) -> Self {
+                #name(<#inner_ty as #import::Float>::ln_1p(self.0))
+            }
+            #[inline]
+            fn sinh(self) -> Self {
+                #name(<#inner_ty as #import::Float>::sinh(self.0))
+            }
+            #[inline]
+            fn cosh(self) -> Self {
+                #name(<#inner_ty as #import::Float>::cosh(self.0))
+            }
+            #[inline]
+            fn tanh(self) -> Self {
+                #name(<#inner_ty as #import::Float>::tanh(self.0))
+            }
+            #[inline]
+            fn asinh(self) -> Self {
+                #name(<#inner_ty as #import::Float>::asinh(self.0))
+            }
+            #[inline]
+            fn acosh(self) -> Self {
+                #name(<#inner_ty as #import::Float>::acosh(self.0))
+            }
+            #[inline]
+            fn atanh(self) -> Self {
+                #name(<#inner_ty as #import::Float>::atanh(self.0))
+            }
+            #[inline]
+            fn integer_decode(self) -> (u64, i16, i8) {
+                <#inner_ty as #import::Float>::integer_decode(self.0)
+            }
+            #[inline]
+            fn epsilon() -> Self {
+                #name(<#inner_ty as #import::Float>::epsilon())
+            }
+            #[inline]
+            fn to_degrees(self) -> Self {
+                #name(<#inner_ty as #import::Float>::to_degrees(self.0))
+            }
+            #[inline]
+            fn to_radians(self) -> Self {
+                #name(<#inner_ty as #import::Float>::to_radians(self.0))
+            }
+        }
+    };
+
+    import.wrap("Float", &name, impl_).into()
+}
diff --git a/third_party/rust/num-derive/tests/empty_enum.rs b/third_party/rust/num-derive/tests/empty_enum.rs
new file mode 100644
index 0000000000..173996c8ed
--- /dev/null
+++ b/third_party/rust/num-derive/tests/empty_enum.rs
@@ -0,0 +1,23 @@
+// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate num as num_renamed;
+#[macro_use]
+extern crate num_derive;
+
+#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)]
+enum Color {}
+
+#[test]
+fn test_empty_enum() {
+    let v: [Option<Color>; 1] = [num_renamed::FromPrimitive::from_u64(0)];
+
+    assert_eq!(v, [None]);
+}
diff --git a/third_party/rust/num-derive/tests/issue-16.rs b/third_party/rust/num-derive/tests/issue-16.rs
new file mode 100644
index 0000000000..48cc2fbf8e
--- /dev/null
+++ b/third_party/rust/num-derive/tests/issue-16.rs
@@ -0,0 +1,11 @@
+macro_rules! get_an_isize {
+    () => {
+        0_isize
+    };
+}
+
+#[derive(num_derive::FromPrimitive)]
+pub enum CLikeEnum {
+    VarA = get_an_isize!(),
+    VarB = 2,
+}
diff --git a/third_party/rust/num-derive/tests/issue-6.rs b/third_party/rust/num-derive/tests/issue-6.rs
new file mode 100644
index 0000000000..9eae7fb3f5
--- /dev/null
+++ b/third_party/rust/num-derive/tests/issue-6.rs
@@ -0,0 +1,17 @@
+#![deny(trivial_numeric_casts)]
+
+#[macro_use]
+extern crate num_derive;
+
+#[derive(FromPrimitive, ToPrimitive)]
+pub enum SomeEnum {
+    A = 1,
+}
+
+#[test]
+fn test_trivial_numeric_casts() {
+    use num::{FromPrimitive, ToPrimitive};
+    assert!(SomeEnum::from_u64(1).is_some());
+    assert!(SomeEnum::from_i64(-1).is_none());
+    assert_eq!(SomeEnum::A.to_u64(), Some(1));
+}
diff --git a/third_party/rust/num-derive/tests/issue-9.rs b/third_party/rust/num-derive/tests/issue-9.rs
new file mode 100644
index 0000000000..30c04d2f46
--- /dev/null
+++ b/third_party/rust/num-derive/tests/issue-9.rs
@@ -0,0 +1,18 @@
+#![deny(unused_qualifications)]
+
+#[macro_use]
+extern crate num_derive;
+use num::FromPrimitive;
+use num::ToPrimitive;
+
+#[derive(FromPrimitive, ToPrimitive)]
+pub enum SomeEnum {
+    A = 1,
+}
+
+#[test]
+fn test_unused_qualifications() {
+    assert!(SomeEnum::from_u64(1).is_some());
+    assert!(SomeEnum::from_i64(-1).is_none());
+    assert!(SomeEnum::A.to_i64().is_some());
+}
diff --git a/third_party/rust/num-derive/tests/newtype-2015.rs b/third_party/rust/num-derive/tests/newtype-2015.rs
new file mode 100644
index 0000000000..2b581907ec
--- /dev/null
+++ b/third_party/rust/num-derive/tests/newtype-2015.rs
@@ -0,0 +1,2 @@
+// Same source, just compiled for 2015 edition
+include!("newtype.rs");
diff --git a/third_party/rust/num-derive/tests/newtype-2018.rs b/third_party/rust/num-derive/tests/newtype-2018.rs
new file mode 100644
index 0000000000..814529ec8a
--- /dev/null
+++ b/third_party/rust/num-derive/tests/newtype-2018.rs
@@ -0,0 +1,2 @@
+// Same source, just compiled for 2018 edition
+include!("newtype.rs");
diff --git a/third_party/rust/num-derive/tests/newtype.rs b/third_party/rust/num-derive/tests/newtype.rs
new file mode 100644
index 0000000000..6eafd0960b
--- /dev/null
+++ b/third_party/rust/num-derive/tests/newtype.rs
@@ -0,0 +1,89 @@
+extern crate num as num_renamed;
+#[macro_use]
+extern crate num_derive;
+
+use crate::num_renamed::{Float, FromPrimitive, Num, NumCast, One, ToPrimitive, Zero};
+use std::ops::Neg;
+
+#[derive(
+    Debug,
+    Clone,
+    Copy,
+    PartialEq,
+    PartialOrd,
+    ToPrimitive,
+    FromPrimitive,
+    NumOps,
+    NumCast,
+    One,
+    Zero,
+    Num,
+    Float,
+)]
+struct MyFloat(f64);
+
+impl Neg for MyFloat {
+    type Output = MyFloat;
+    fn neg(self) -> Self {
+        MyFloat(self.0.neg())
+    }
+}
+
+#[test]
+fn test_from_primitive() {
+    assert_eq!(MyFloat::from_u32(25), Some(MyFloat(25.0)));
+}
+
+#[test]
+fn test_from_primitive_128() {
+    assert_eq!(
+        MyFloat::from_i128(std::i128::MIN),
+        Some(MyFloat((-2.0).powi(127)))
+    );
+}
+
+#[test]
+fn test_to_primitive() {
+    assert_eq!(MyFloat(25.0).to_u32(), Some(25));
+}
+
+#[test]
+fn test_to_primitive_128() {
+    let f = MyFloat::from_f32(std::f32::MAX).unwrap();
+    assert_eq!(f.to_i128(), None);
+    assert_eq!(f.to_u128(), Some(0xffff_ff00_0000_0000_0000_0000_0000_0000));
+}
+
+#[test]
+fn test_num_ops() {
+    assert_eq!(MyFloat(25.0) + MyFloat(10.0), MyFloat(35.0));
+    assert_eq!(MyFloat(25.0) - MyFloat(10.0), MyFloat(15.0));
+    assert_eq!(MyFloat(25.0) * MyFloat(2.0), MyFloat(50.0));
+    assert_eq!(MyFloat(25.0) / MyFloat(10.0), MyFloat(2.5));
+    assert_eq!(MyFloat(25.0) % MyFloat(10.0), MyFloat(5.0));
+}
+
+#[test]
+fn test_num_cast() {
+    assert_eq!(<MyFloat as NumCast>::from(25u8), Some(MyFloat(25.0)));
+}
+
+#[test]
+fn test_zero() {
+    assert_eq!(MyFloat::zero(), MyFloat(0.0));
+}
+
+#[test]
+fn test_one() {
+    assert_eq!(MyFloat::one(), MyFloat(1.0));
+}
+
+#[test]
+fn test_num() {
+    assert_eq!(MyFloat::from_str_radix("25", 10).ok(), Some(MyFloat(25.0)));
+}
+
+#[test]
+fn test_float() {
+    assert_eq!(MyFloat(4.0).log(MyFloat(2.0)), MyFloat(2.0));
+}
diff --git a/third_party/rust/num-derive/tests/num_derive_without_num.rs b/third_party/rust/num-derive/tests/num_derive_without_num.rs
new file mode 100644
index 0000000000..edebbecbfa
--- /dev/null
+++ b/third_party/rust/num-derive/tests/num_derive_without_num.rs
@@ -0,0 +1,20 @@
+// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate num_derive;
+
+#[derive(Debug, FromPrimitive, ToPrimitive)]
+enum Direction {
+    Up,
+    Down,
+    Left,
+    Right,
+}
diff --git a/third_party/rust/num-derive/tests/trivial-2015.rs b/third_party/rust/num-derive/tests/trivial-2015.rs
new file mode 100644
index 0000000000..8309f0e889
--- /dev/null
+++ b/third_party/rust/num-derive/tests/trivial-2015.rs
@@ -0,0 +1,2 @@
+// Same source, just compiled for 2015 edition
+include!("trivial.rs");
diff --git a/third_party/rust/num-derive/tests/trivial-2018.rs b/third_party/rust/num-derive/tests/trivial-2018.rs
new file mode 100644
index 0000000000..92b971bc83
--- /dev/null
+++ b/third_party/rust/num-derive/tests/trivial-2018.rs
@@ -0,0 +1,2 @@
+// Same source, just compiled for 2018 edition
+include!("trivial.rs");
diff --git a/third_party/rust/num-derive/tests/trivial.rs b/third_party/rust/num-derive/tests/trivial.rs
new file mode 100644
index 0000000000..d3b56b6a25
--- /dev/null
+++ b/third_party/rust/num-derive/tests/trivial.rs
@@ -0,0 +1,64 @@
+// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate num as num_renamed;
+#[macro_use]
+extern crate num_derive;
+
+#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)]
+enum Color {
+    Red,
+    Blue,
+    Green,
+}
+
+#[test]
+fn test_from_primitive_for_trivial_case() {
+    let v: [Option<Color>; 4] = [
+        num_renamed::FromPrimitive::from_u64(0),
+        num_renamed::FromPrimitive::from_u64(1),
+        num_renamed::FromPrimitive::from_u64(2),
+        num_renamed::FromPrimitive::from_u64(3),
+    ];
+
+    assert_eq!(
+        v,
+        [
+            Some(Color::Red),
+            Some(Color::Blue),
+            Some(Color::Green),
+            None
+        ]
+    );
+}
+
+#[test]
+fn test_to_primitive_for_trivial_case() {
+    let v: [Option<u64>; 3] = [
+        num_renamed::ToPrimitive::to_u64(&Color::Red),
+        num_renamed::ToPrimitive::to_u64(&Color::Blue),
+        num_renamed::ToPrimitive::to_u64(&Color::Green),
+    ];
+
+    assert_eq!(v, [Some(0), Some(1), Some(2)]);
+}
+
+#[test]
+fn test_reflexive_for_trivial_case() {
+    let before: [u64; 3] = [0, 1, 2];
+    let after: Vec<Option<u64>> = before
+        .iter()
+        .map(|&x| -> Option<Color> { num_renamed::FromPrimitive::from_u64(x) })
+        .map(|x| x.and_then(|x| num_renamed::ToPrimitive::to_u64(&x)))
+        .collect();
+    let before = before.iter().cloned().map(Some).collect::<Vec<_>>();
+
+    assert_eq!(before, after);
+}
diff --git a/third_party/rust/num-derive/tests/with_custom_values.rs b/third_party/rust/num-derive/tests/with_custom_values.rs
new file mode 100644
index 0000000000..9b202f4c51
--- /dev/null
+++ b/third_party/rust/num-derive/tests/with_custom_values.rs
@@ -0,0 +1,68 @@
+// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate num as num_renamed;
+#[macro_use]
+extern crate num_derive;
+
+#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)]
+enum Color {
+    Red,
+    Blue = 5,
+    Green,
+    Alpha = (-3 - (-5isize)) - 10,
+}
+
+#[test]
+fn test_from_primitive_for_enum_with_custom_value() {
+    let v: [Option<Color>; 5] = [
+        num_renamed::FromPrimitive::from_u64(0),
+        num_renamed::FromPrimitive::from_u64(5),
+        num_renamed::FromPrimitive::from_u64(6),
+        num_renamed::FromPrimitive::from_u64(-8isize as u64),
+        num_renamed::FromPrimitive::from_u64(3),
+    ];
+
+    assert_eq!(
+        v,
+        [
+            Some(Color::Red),
+            Some(Color::Blue),
+            Some(Color::Green),
+            Some(Color::Alpha),
+            None
+        ]
+    );
+}
+
+#[test]
+fn test_to_primitive_for_enum_with_custom_value() {
+    let v: [Option<u64>; 4] = [
+        num_renamed::ToPrimitive::to_u64(&Color::Red),
+        num_renamed::ToPrimitive::to_u64(&Color::Blue),
+        num_renamed::ToPrimitive::to_u64(&Color::Green),
+        num_renamed::ToPrimitive::to_u64(&Color::Alpha),
+    ];
+
+    assert_eq!(v, [Some(0), Some(5), Some(6), Some(-8isize as u64)]);
+}
+
+#[test]
+fn test_reflexive_for_enum_with_custom_value() {
+    let before: [u64; 3] = [0, 5, 6];
+    let after: Vec<Option<u64>> = before
+        .iter()
+        .map(|&x| -> Option<Color> { num_renamed::FromPrimitive::from_u64(x) })
+        .map(|x| x.and_then(|x| num_renamed::ToPrimitive::to_u64(&x)))
+        .collect();
+    let before = before.iter().cloned().map(Some).collect::<Vec<_>>();
+
+    assert_eq!(before, after);
+}