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Diffstat (limited to 'third_party/rust/enum-map-derive')
| -rw-r--r-- | third_party/rust/enum-map-derive/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/Cargo.toml | 54 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/LICENSES/Apache-2.0.txt | 73 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/LICENSES/CC0-1.0.txt | 121 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/LICENSES/MIT.txt | 9 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/README.md | 10 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/src/derive_enum.rs | 216 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/src/derive_struct.rs | 129 | ||||
| -rw-r--r-- | third_party/rust/enum-map-derive/src/lib.rs | 178 |
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. 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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 + } +} |