Adding upstream version 124.0.1.upstream/124.0.1

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

9 files changed, 791 insertions, 0 deletions

diff --git a/third_party/rust/enum-map-derive/.cargo-checksum.json b/third_party/rust/enum-map-derive/.cargo-checksum.json
new file mode 100644
index 0000000000..2650ba111c
--- /dev/null
+++ b/third_party/rust/enum-map-derive/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"ebe51a5658f0e34f3f31cd0f4af2a90affbc5e562b6d4695fab1ae31348c2590","LICENSES/Apache-2.0.txt":"074e6e32c86a4c0ef8b3ed25b721ca23aca83df277cd88106ef7177c354615ff","LICENSES/CC0-1.0.txt":"a2010f343487d3f7618affe54f789f5487602331c0a8d03f49e9a7c547cf0499","LICENSES/MIT.txt":"b85dcd3e453d05982552c52b5fc9e0bdd6d23c6f8e844b984a88af32570b0cc0","README.md":"9ba5f04156a8fb4aeec6af6db17b6716c18dc73e1db59300340591f246f4558e","src/derive_enum.rs":"fc478b32e580dabfa31f71db2958faf05125e58b17bf420a881930d96e76ce11","src/derive_struct.rs":"ec7e4d1f44925713098713c8c77af87142f499999a812687d52306cc9255224f","src/lib.rs":"531dd501eced4ebf2733d525417adc9ef724e1c117ffb20be7453a79200c2988"},"package":"f282cfdfe92516eb26c2af8589c274c7c17681f5ecc03c18255fe741c6aa64eb"}
\ No newline at end of file
diff --git a/third_party/rust/enum-map-derive/Cargo.toml b/third_party/rust/enum-map-derive/Cargo.toml
new file mode 100644
index 0000000000..2e17e5d8ee
--- /dev/null
+++ b/third_party/rust/enum-map-derive/Cargo.toml
@@ -0,0 +1,54 @@
+# 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 = "1.61"
+name = "enum-map-derive"
+version = "0.17.0"
+authors = ["Kamila Borowska <kamila@borowska.pw>"]
+description = "Macros 1.1 implementation of #[derive(Enum)]"
+readme = "README.md"
+keywords = [
+    "data-structure",
+    "no_std",
+    "enum",
+]
+categories = [
+    "data-structures",
+    "no-std",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://codeberg.org/xfix/enum-map"
+
+[lib]
+proc-macro = true
+
+[dependencies.proc-macro2]
+version = "1.0.60"
+
+[dependencies.quote]
+version = "1.0.7"
+
+[dependencies.syn]
+version = "2.0.0"
+features = [
+    "derive",
+    "parsing",
+    "printing",
+    "proc-macro",
+]
+default-features = false
+
+[dev-dependencies]
+
+[badges.maintenance]
+status = "passively-maintained"
diff --git a/third_party/rust/enum-map-derive/LICENSES/Apache-2.0.txt b/third_party/rust/enum-map-derive/LICENSES/Apache-2.0.txt
new file mode 100644
index 0000000000..137069b823
--- /dev/null
+++ b/third_party/rust/enum-map-derive/LICENSES/Apache-2.0.txt
@@ -0,0 +1,73 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+Unless required by applicable law or agreed to in writing, software
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diff --git a/third_party/rust/enum-map-derive/LICENSES/CC0-1.0.txt b/third_party/rust/enum-map-derive/LICENSES/CC0-1.0.txt
new file mode 100644
index 0000000000..0e259d42c9
--- /dev/null
+++ b/third_party/rust/enum-map-derive/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
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+Statement of Purpose
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+
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+be judged legally invalid or ineffective under applicable law, then the
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+irrevocable and unconditional license to exercise Affirmer's Copyright and
+Related Rights in the Work (i) in all territories worldwide, (ii) for the
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+time extensions), (iii) in any current or future medium and for any number
+of copies, and (iv) for any purpose whatsoever, including without
+limitation commercial, advertising or promotional purposes (the
+"License"). The License shall be deemed effective as of the date CC0 was
+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
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+action with respect to the Work, in either case contrary to Affirmer's
+express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
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+    this CC0 or use of the Work.
diff --git a/third_party/rust/enum-map-derive/LICENSES/MIT.txt b/third_party/rust/enum-map-derive/LICENSES/MIT.txt
new file mode 100644
index 0000000000..2071b23b0e
--- /dev/null
+++ b/third_party/rust/enum-map-derive/LICENSES/MIT.txt
@@ -0,0 +1,9 @@
+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+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 limitation the rights to use, copy, modify, merge, 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/enum-map-derive/README.md b/third_party/rust/enum-map-derive/README.md
new file mode 100644
index 0000000000..a5b8481d7d
--- /dev/null
+++ b/third_party/rust/enum-map-derive/README.md
@@ -0,0 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2022 Kamila Borowska <kamila@borowska.pw>
+
+SPDX-License-Identifier: MIT OR Apache-2.0
+-->
+
+# enum-map-derive
+
+This is a derive macro for `enum-map`. You don't need to specify it
+in dependencies as `enum-map` crate re-exports it.
diff --git a/third_party/rust/enum-map-derive/src/derive_enum.rs b/third_party/rust/enum-map-derive/src/derive_enum.rs
new file mode 100644
index 0000000000..8dce3de984
--- /dev/null
+++ b/third_party/rust/enum-map-derive/src/derive_enum.rs
@@ -0,0 +1,216 @@
+// SPDX-FileCopyrightText: 2021 - 2023 Kamila Borowska <kamila@borowska.pw>
+// SPDX-FileCopyrightText: 2021 Bruno Corrêa Zimmermann <brunoczim@gmail.com>
+//
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+use crate::type_length;
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote, ToTokens};
+use syn::{DataEnum, Fields, FieldsNamed, FieldsUnnamed, Ident, Variant};
+
+pub fn generate(name: Ident, data_enum: DataEnum) -> TokenStream {
+    let mut generator = EnumGenerator::empty();
+    for variant in &data_enum.variants {
+        generator.handle_variant(variant);
+    }
+    generator.finish(&name)
+}
+
+#[derive(Debug)]
+struct Length {
+    units: usize,
+    opaque: TokenStream,
+}
+
+impl ToTokens for Length {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        let Self { units, opaque } = self;
+        tokens.extend(quote! { (#units + #opaque) });
+    }
+}
+
+/// Total length is the sum of each variant's length. To represent a variant, its number is added to
+/// the sum of previous variant lengths.
+#[derive(Debug)]
+struct EnumGenerator {
+    length: Length,
+    from_usize_arms: TokenStream,
+    into_usize_arms: TokenStream,
+}
+
+impl EnumGenerator {
+    fn empty() -> Self {
+        Self {
+            length: Length {
+                units: 0,
+                opaque: quote! { 0 },
+            },
+            from_usize_arms: quote! {},
+            into_usize_arms: quote! {},
+        }
+    }
+
+    fn finish(&self, name: &Ident) -> TokenStream {
+        let Self {
+            length,
+            from_usize_arms,
+            into_usize_arms,
+        } = self;
+
+        quote! {
+            #[automatically_derived]
+            impl ::enum_map::Enum for #name {
+                const LENGTH: ::enum_map::usize = #length;
+
+                #[inline]
+                fn from_usize(value: ::enum_map::usize) -> Self {
+                    #from_usize_arms {
+                        ::enum_map::out_of_bounds()
+                    }
+                }
+
+                #[inline]
+                fn into_usize(self) -> ::enum_map::usize {
+                    match self {
+                        #into_usize_arms
+                    }
+                }
+            }
+
+            #[automatically_derived]
+            impl<V> ::enum_map::EnumArray<V> for #name {
+                type Array = [V; #length];
+            }
+        }
+    }
+
+    fn handle_variant(&mut self, variant: &Variant) {
+        match &variant.fields {
+            Fields::Unit => self.handle_unit_variant(&variant.ident),
+            Fields::Unnamed(fields) => self.handle_unnamed_variant(&variant.ident, fields),
+            Fields::Named(fields) => self.handle_named_variant(&variant.ident, fields),
+        }
+    }
+
+    /// Becomes simply `1` in counting, since this is the size of the unit.
+    fn handle_unit_variant(&mut self, variant: &Ident) {
+        let Self {
+            length,
+            from_usize_arms,
+            into_usize_arms,
+        } = self;
+        *into_usize_arms = quote! { #into_usize_arms Self::#variant => #length, };
+        *from_usize_arms = quote! {
+            #from_usize_arms if value == #length {
+                Self::#variant
+            } else
+        };
+        self.length.units += 1;
+    }
+
+    /// Its size is the product of the sizes of its members. To represent this variant, one can
+    /// think of this as representing a little-endian number. First member is simply added, but
+    /// next members are multiplied before being added.
+    fn handle_unnamed_variant(&mut self, variant: &Ident, fields: &FieldsUnnamed) {
+        let Self {
+            length,
+            from_usize_arms,
+            into_usize_arms,
+        } = self;
+        let mut expr_into = quote! { #length };
+        let mut fields_length = quote! { 1usize };
+        let mut params_from = quote! {};
+        for (i, field) in fields.unnamed.iter().enumerate() {
+            let ident = format_ident!("p{}", i);
+            let ty = &field.ty;
+            let field_length = type_length(ty);
+
+            expr_into = quote! {
+                (#expr_into + #fields_length * ::enum_map::Enum::into_usize(#ident))
+            };
+
+            params_from = quote! {
+                #params_from <#ty as ::enum_map::Enum>::from_usize(
+                    (value - #length) / #fields_length % #field_length
+                ),
+            };
+
+            fields_length = quote! { (#fields_length * #field_length) };
+        }
+
+        *length = Length {
+            units: 0,
+            opaque: quote! { (#length + #fields_length) },
+        };
+
+        let from_arms = &from_usize_arms;
+        *from_usize_arms = quote! {
+            #from_arms if value < #length {
+                Self::#variant(#params_from)
+            } else
+        };
+
+        let mut params_into = quote! {};
+        for i in 0..fields.unnamed.len() {
+            let ident = format_ident!("p{}", i);
+            params_into = quote! { #params_into #ident, };
+        }
+
+        *into_usize_arms = quote! {
+            #into_usize_arms Self::#variant(#params_into) => #expr_into,
+        };
+    }
+
+    /// Its size is the product of the sizes of its members. To represent this variant, one can
+    /// think of this as representing a little-endian number. First member is simply added, but
+    /// next members are multiplied before being added.
+    fn handle_named_variant(&mut self, variant: &Ident, fields: &FieldsNamed) {
+        let Self {
+            length,
+            from_usize_arms,
+            into_usize_arms,
+        } = self;
+        let mut expr_into = quote! { #length };
+        let mut fields_length = quote! { 1usize };
+        let mut params_from = quote! {};
+
+        for field in fields.named.iter() {
+            let ident = field.ident.as_ref().unwrap();
+            let ty = &field.ty;
+            let field_length = type_length(ty);
+
+            expr_into = quote! {
+                (#expr_into + #fields_length * ::enum_map::Enum::into_usize(#ident))
+            };
+
+            params_from = quote! {
+                #params_from #ident: <#ty as ::enum_map::Enum>::from_usize(
+                    (value - #length) / #fields_length % #field_length
+                ),
+            };
+
+            fields_length = quote! { (#fields_length * #field_length) };
+        }
+
+        *length = Length {
+            units: 0,
+            opaque: quote! { (#length + #fields_length) },
+        };
+
+        *from_usize_arms = quote! {
+            #from_usize_arms if value < #length {
+                Self::#variant { #params_from }
+            } else
+        };
+
+        let mut params_into = quote! {};
+        for field in fields.named.iter() {
+            let ident = field.ident.as_ref().unwrap();
+            params_into = quote! { #params_into #ident, };
+        }
+
+        *into_usize_arms = quote! {
+            #into_usize_arms Self::#variant { #params_into } => #expr_into,
+        };
+    }
+}
diff --git a/third_party/rust/enum-map-derive/src/derive_struct.rs b/third_party/rust/enum-map-derive/src/derive_struct.rs
new file mode 100644
index 0000000000..94f3f97250
--- /dev/null
+++ b/third_party/rust/enum-map-derive/src/derive_struct.rs
@@ -0,0 +1,129 @@
+// SPDX-FileCopyrightText: 2021 - 2022 Kamila Borowska <kamila@borowska.pw>
+// SPDX-FileCopyrightText: 2021 Bruno Corrêa Zimmermann <brunoczim@gmail.com>
+//
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+use crate::type_length;
+use proc_macro2::TokenStream;
+use quote::quote;
+use syn::{DataStruct, Fields, FieldsNamed, FieldsUnnamed, Ident, Index};
+
+pub fn generate(name: Ident, data_struct: DataStruct) -> TokenStream {
+    StructGenerator::from_fields(&data_struct.fields).finish(&name)
+}
+
+/// Total length is the product of each member's length. To represent a struct, one can
+/// think of this as representing a little-endian number. First member is simply added, but
+/// next members are multiplied before being added.
+#[derive(Debug)]
+struct StructGenerator {
+    length: TokenStream,
+    from_usize: TokenStream,
+    into_usize: TokenStream,
+}
+
+impl StructGenerator {
+    fn from_fields(fields: &Fields) -> Self {
+        match fields {
+            Fields::Unit => Self::from_unit_fields(),
+            Fields::Unnamed(fields_data) => Self::from_unnamed_fields(fields_data),
+            Fields::Named(fields_data) => Self::from_named_fields(fields_data),
+        }
+    }
+
+    fn from_unit_fields() -> Self {
+        Self {
+            length: quote! { 1usize },
+            from_usize: quote! { Self },
+            into_usize: quote! { 0usize },
+        }
+    }
+
+    fn from_unnamed_fields(fields: &FieldsUnnamed) -> Self {
+        let mut params_from = quote! {};
+        let mut into_usize = quote! { 0usize };
+        let mut length = quote! { 1usize };
+        for (i, field) in fields.unnamed.iter().enumerate() {
+            let ty = &field.ty;
+            let index_ident = Index::from(i);
+            let field_length = type_length(ty);
+
+            into_usize = quote! {
+                (#into_usize + #length * ::enum_map::Enum::into_usize(self.#index_ident))
+            };
+
+            params_from = quote! {
+                #params_from <#ty as ::enum_map::Enum>::from_usize(
+                    value / #length % #field_length
+                ),
+            };
+
+            length = quote! { (#length * #field_length) };
+        }
+
+        let from_usize = quote! { Self(#params_from) };
+        Self {
+            length,
+            from_usize,
+            into_usize,
+        }
+    }
+
+    fn from_named_fields(fields: &FieldsNamed) -> Self {
+        let mut params_from = quote! {};
+        let mut into_usize = quote! { 0usize };
+        let mut length = quote! { 1usize };
+        for field in fields.named.iter() {
+            let ty = &field.ty;
+            let ident = field.ident.as_ref().unwrap();
+            let field_length = type_length(ty);
+
+            into_usize = quote! {
+                (#into_usize + #length * ::enum_map::Enum::into_usize(self.#ident))
+            };
+
+            params_from = quote! {
+                #params_from #ident: <#ty as ::enum_map::Enum>::from_usize(
+                    value / #length % #field_length
+                ),
+            };
+
+            length = quote! { (#field_length * #length) };
+        }
+
+        let from_usize = quote! { Self { #params_from } };
+        Self {
+            length,
+            from_usize,
+            into_usize,
+        }
+    }
+
+    fn finish(&self, name: &Ident) -> TokenStream {
+        let length = &self.length;
+        let from_usize = &self.from_usize;
+        let into_usize = &self.into_usize;
+
+        quote! {
+            #[automatically_derived]
+            impl ::enum_map::Enum for #name {
+                const LENGTH: ::enum_map::usize = #length;
+
+                #[inline]
+                fn from_usize(value: ::enum_map::usize) -> Self {
+                    #from_usize
+                }
+
+                #[inline]
+                fn into_usize(self) -> ::enum_map::usize {
+                    #into_usize
+                }
+            }
+
+            #[automatically_derived]
+            impl<V> ::enum_map::EnumArray<V> for #name {
+                type Array = [V; #length];
+            }
+        }
+    }
+}
diff --git a/third_party/rust/enum-map-derive/src/lib.rs b/third_party/rust/enum-map-derive/src/lib.rs
new file mode 100644
index 0000000000..0776559b28
--- /dev/null
+++ b/third_party/rust/enum-map-derive/src/lib.rs
@@ -0,0 +1,178 @@
+// SPDX-FileCopyrightText: 2017 - 2022 Kamila Borowska <kamila@borowska.pw>
+// SPDX-FileCopyrightText: 2018 hcpl <hcpl.prog@gmail.com>
+// SPDX-FileCopyrightText: 2019 mara <vmedea@protonmail.com>
+// SPDX-FileCopyrightText: 2021 Bruno Corrêa Zimmermann <brunoczim@gmail.com>
+// SPDX-FileCopyrightText: 2021 Dietrich <dietrich@teilgedanken.de>
+//
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+//! Procedural macro implementing `#[derive(Enum)]`
+//!
+//! This is supposed to used with `enum-map` crate, which provides the
+//! actual usage documentation.
+
+mod derive_enum;
+mod derive_struct;
+
+use proc_macro2::TokenStream;
+use quote::quote;
+use syn::{Data, DeriveInput, Type};
+
+/// Derive macro generating an implementation of trait `Enum`.
+///
+/// When using a derive, enum maps are maintained in the order in which
+/// enum variants are declared. This is reflected in the value returned
+/// by `Enum::into_usize`, iterators of enum map as well as
+/// `EnumMap::as_slice` method.
+///
+/// # Examples
+///
+/// ## Enums Without Payload
+/// ```
+/// use enum_map::Enum;
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum A {
+///     B,
+///     C,
+///     D,
+/// }
+///
+/// assert_eq!(A::B.into_usize(), 0);
+/// assert_eq!(A::C.into_usize(), 1);
+/// assert_eq!(A::D.into_usize(), 2);
+///
+/// assert_eq!(A::from_usize(0), A::B);
+/// assert_eq!(A::from_usize(1), A::C);
+/// assert_eq!(A::from_usize(2), A::D);
+/// ```
+///
+/// ## Enums With Payload
+///
+/// ```
+/// use enum_map::Enum;
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum A {
+///     B,
+///     C,
+///     D,
+/// }
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum X {
+///     Y,
+///     Z,
+/// }
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum Foo {
+///     Bar(bool, A),
+///     Empty,
+///     Baz { fa: A, fx: X },
+/// }
+///
+/// assert_eq!(Foo::Bar(false, A::B).into_usize(), 0);
+/// assert_eq!(Foo::Bar(false, A::D).into_usize(), 4);
+/// assert_eq!(Foo::Bar(true, A::B).into_usize(), 1);
+/// assert_eq!(Foo::Bar(true, A::C).into_usize(), 3);
+/// assert_eq!(Foo::Empty.into_usize(), 6);
+/// assert_eq!(Foo::Baz { fa: A::B, fx: X::Y }.into_usize(), 7);
+/// assert_eq!(Foo::Baz { fa: A::B, fx: X::Z }.into_usize(), 10);
+/// assert_eq!(Foo::Baz { fa: A::D, fx: X::Y }.into_usize(), 9);
+///
+/// assert_eq!(Foo::from_usize(0), Foo::Bar(false, A::B));
+/// assert_eq!(Foo::from_usize(4), Foo::Bar(false, A::D));
+/// assert_eq!(Foo::from_usize(1), Foo::Bar(true, A::B));
+/// assert_eq!(Foo::from_usize(3), Foo::Bar(true, A::C));
+/// assert_eq!(Foo::from_usize(6), Foo::Empty);
+/// assert_eq!(Foo::from_usize(7), Foo::Baz { fa: A::B, fx: X::Y });
+/// assert_eq!(Foo::from_usize(10), Foo::Baz { fa: A::B, fx: X::Z });
+/// assert_eq!(Foo::from_usize(9), Foo::Baz { fa: A::D, fx: X::Y });
+///
+/// ```
+///
+/// ## Structs
+///
+/// ```
+/// use enum_map::Enum;
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum A {
+///     B,
+///     C,
+///     D,
+/// }
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum X {
+///     Y,
+///     Z,
+/// }
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// struct Foo {
+///     bar: bool,
+///     baz: A,
+///     end: X,
+/// }
+///
+/// assert_eq!(Foo { bar: false, baz: A::B, end: X::Y }.into_usize(), 0);
+/// assert_eq!(Foo { bar: true, baz: A::B, end: X::Y }.into_usize(), 1);
+/// assert_eq!(Foo { bar: false, baz: A::D, end: X::Y }.into_usize(), 4);
+/// assert_eq!(Foo { bar: true, baz: A::C, end: X::Z }.into_usize(), 9);
+///
+/// assert_eq!(Foo::from_usize(0), Foo { bar: false, baz: A::B, end: X::Y });
+/// assert_eq!(Foo::from_usize(1), Foo { bar: true, baz: A::B, end: X::Y });
+/// assert_eq!(Foo::from_usize(4), Foo { bar: false, baz: A::D, end: X::Y });
+/// assert_eq!(Foo::from_usize(9), Foo { bar: true, baz: A::C, end: X::Z });
+/// ```
+///
+/// ## Tuple Structs
+///
+/// ```
+/// use enum_map::Enum;
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum A {
+///     B,
+///     C,
+///     D,
+/// }
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// enum X {
+///     Y,
+///     Z,
+/// }
+///
+/// #[derive(Enum, Debug, PartialEq, Eq)]
+/// struct Foo(bool, A, X);
+///
+/// assert_eq!(Foo(false, A::B, X::Y ).into_usize(), 0);
+/// assert_eq!(Foo(true, A::B, X::Y ).into_usize(), 1);
+/// assert_eq!(Foo(false, A::D, X::Y ).into_usize(), 4);
+/// assert_eq!(Foo(true, A::C, X::Z ).into_usize(), 9);
+///
+/// assert_eq!(Foo::from_usize(0), Foo(false, A::B, X::Y));
+/// assert_eq!(Foo::from_usize(1), Foo(true, A::B, X::Y));
+/// assert_eq!(Foo::from_usize(4), Foo(false, A::D, X::Y));
+/// assert_eq!(Foo::from_usize(9), Foo(true, A::C, X::Z));
+#[proc_macro_derive(Enum)]
+pub fn derive_enum_map(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let input: DeriveInput = syn::parse(input).unwrap();
+
+    let result = match input.data {
+        Data::Enum(data_enum) => derive_enum::generate(input.ident, data_enum),
+        Data::Struct(data_struct) => derive_struct::generate(input.ident, data_struct),
+        _ => quote! { compile_error! {"#[derive(Enum)] is only defined for enums and structs"} },
+    };
+
+    result.into()
+}
+
+fn type_length(ty: &Type) -> TokenStream {
+    quote! {
+        <#ty as ::enum_map::Enum>::LENGTH
+    }
+}