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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /third_party/rust/flagset
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/flagset')
-rw-r--r--third_party/rust/flagset/.cargo-checksum.json1
-rw-r--r--third_party/rust/flagset/Cargo.toml34
-rw-r--r--third_party/rust/flagset/LICENSE202
-rw-r--r--third_party/rust/flagset/README.md227
-rw-r--r--third_party/rust/flagset/src/lib.rs1286
5 files changed, 1750 insertions, 0 deletions
diff --git a/third_party/rust/flagset/.cargo-checksum.json b/third_party/rust/flagset/.cargo-checksum.json
new file mode 100644
index 0000000000..34f013f708
--- /dev/null
+++ b/third_party/rust/flagset/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"5a87209bc98397121d9b710b6eb05559c5f2ddb7884e82fbfc706026a24fac13","LICENSE":"cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30","README.md":"391c693969a7cd5e1810d3fc4271f1b69f79ee1a26def1fc9b3f7c5df50920dd","src/lib.rs":"77804ee547d8723e603975d586deaf4fa8a58bf13a8c80d9416eed0298b39462"},"package":"cda653ca797810c02f7ca4b804b40b8b95ae046eb989d356bce17919a8c25499"} \ No newline at end of file
diff --git a/third_party/rust/flagset/Cargo.toml b/third_party/rust/flagset/Cargo.toml
new file mode 100644
index 0000000000..4164b7b932
--- /dev/null
+++ b/third_party/rust/flagset/Cargo.toml
@@ -0,0 +1,34 @@
+# 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 = "2018"
+name = "flagset"
+version = "0.4.3"
+authors = ["Nathaniel McCallum <nathaniel@profian.com>"]
+description = "Data types and a macro for generating enumeration-based bit flags"
+homepage = "https://github.com/enarx/flagset"
+documentation = "https://docs.rs/flagset"
+readme = "README.md"
+keywords = ["flags", "bitflags", "enum", "enumflags"]
+license = "Apache-2.0"
+repository = "https://github.com/enarx/flagset"
+[package.metadata.docs.rs]
+all-features = true
+[dependencies.serde]
+version = "1.0"
+features = ["serde_derive"]
+optional = true
+[dev-dependencies.serde_json]
+version = "1.0"
+
+[dev-dependencies.serde_repr]
+version = "0.1"
diff --git a/third_party/rust/flagset/LICENSE b/third_party/rust/flagset/LICENSE
new file mode 100644
index 0000000000..d645695673
--- /dev/null
+++ b/third_party/rust/flagset/LICENSE
@@ -0,0 +1,202 @@
+
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diff --git a/third_party/rust/flagset/README.md b/third_party/rust/flagset/README.md
new file mode 100644
index 0000000000..d66e250b1a
--- /dev/null
+++ b/third_party/rust/flagset/README.md
@@ -0,0 +1,227 @@
+[![Build Status](https://github.com/enarx/flagset/workflows/test/badge.svg)](https://github.com/enarx/flagset/actions)
+![Rust Version 1.36+](https://img.shields.io/badge/rustc-v1.36%2B-blue.svg)
+[![Crate](https://img.shields.io/crates/v/flagset.svg)](https://crates.io/crates/flagset)
+[![Docs](https://docs.rs/flagset/badge.svg)](https://docs.rs/flagset)
+![License](https://img.shields.io/crates/l/flagset.svg?style=popout)
+
+# Welcome to FlagSet!
+
+FlagSet is a new, ergonomic approach to handling flags that combines the
+best of existing crates like `bitflags` and `enumflags` without their
+downsides.
+
+## Existing Implementations
+
+The `bitflags` crate has long been part of the Rust ecosystem.
+Unfortunately, it doesn't feel like natural Rust. The `bitflags` crate
+uses a wierd struct format to define flags. Flags themselves are just
+integers constants, so there is little type-safety involved. But it doesn't
+have any dependencies. It also allows you to define implied flags (otherwise
+known as overlapping flags).
+
+The `enumflags` crate tried to improve on `bitflags` by using enumerations
+to define flags. This was a big improvement to the natural feel of the code.
+Unfortunately, there are some design flaws. To generate the flags,
+procedural macros were used. This implied two separate crates plus
+additional dependencies. Further, `enumflags` specifies the size of the
+flags using a `repr($size)` attribute. Unfortunately, this attribute
+cannot resolve type aliases, such as `c_int`. This makes `enumflags` a
+poor fit for FFI, which is the most important place for a flags library.
+The `enumflags` crate also disallows overlapping flags and is not
+maintained.
+
+FlagSet improves on both of these by adopting the `enumflags` natural feel
+and the `bitflags` mode of flag generation; as well as additional API usage
+niceties. FlagSet has no dependencies and is extensively documented and
+tested. It also tries very hard to prevent you from making mistakes by
+avoiding external usage of the integer types. FlagSet is also a zero-cost
+abstraction: all functions are inlineable and should reduce to the core
+integer operations. FlagSet also does not depend on stdlib, so it can be
+used in `no_std` libraries and applications.
+
+## Defining Flags
+
+Flags are defined using the `flags!` macro:
+
+```rust
+use flagset::{FlagSet, flags};
+use std::os::raw::c_int;
+
+flags! {
+ enum FlagsA: u8 {
+ Foo,
+ Bar,
+ Baz,
+ }
+
+ enum FlagsB: c_int {
+ Foo,
+ Bar,
+ Baz,
+ }
+}
+```
+
+Notice that a flag definition looks just like a regular enumeration, with
+the addition of the field-size type. The field-size type is required and
+can be either a type or a type alias. Both examples are given above.
+
+Also note that the field-size type specifies the size of the corresponding
+`FlagSet` type, not size of the enumeration itself. To specify the size of
+the enumeration, use the `repr($size)` attribute as specified below.
+
+## Flag Values
+
+Flags often need values assigned to them. This can be done implicitly,
+where the value depends on the order of the flags:
+
+```rust
+use flagset::{FlagSet, flags};
+
+flags! {
+ enum Flags: u16 {
+ Foo, // Implicit Value: 0b0001
+ Bar, // Implicit Value: 0b0010
+ Baz, // Implicit Value: 0b0100
+ }
+}
+```
+
+Alternatively, flag values can be defined explicitly, by specifying any
+`const` expression:
+
+```rust
+use flagset::{FlagSet, flags};
+
+flags! {
+ enum Flags: u16 {
+ Foo = 0x01, // Explicit Value: 0b0001
+ Bar = 2, // Explicit Value: 0b0010
+ Baz = 0b0100, // Explicit Value: 0b0100
+ }
+}
+```
+
+Flags can also overlap or "imply" other flags:
+
+```rust
+use flagset::{FlagSet, flags};
+
+flags! {
+ enum Flags: u16 {
+ Foo = 0b0001,
+ Bar = 0b0010,
+ Baz = 0b0110, // Implies Bar
+ All = (Flags::Foo | Flags::Bar | Flags::Baz).bits(),
+ }
+}
+```
+
+## Specifying Attributes
+
+Attributes can be used on the enumeration itself or any of the values:
+
+```rust
+use flagset::{FlagSet, flags};
+
+flags! {
+ #[derive(PartialOrd, Ord)]
+ enum Flags: u8 {
+ Foo,
+ #[deprecated]
+ Bar,
+ Baz,
+ }
+}
+```
+
+## Collections of Flags
+
+A collection of flags is a `FlagSet<T>`. If you are storing the flags in
+memory, the raw `FlagSet<T>` type should be used. However, if you want to
+receive flags as an input to a function, you should use
+`impl Into<FlagSet<T>>`. This allows for very ergonomic APIs:
+
+```rust
+use flagset::{FlagSet, flags};
+
+flags! {
+ enum Flags: u8 {
+ Foo,
+ Bar,
+ Baz,
+ }
+}
+
+struct Container(FlagSet<Flags>);
+
+impl Container {
+ fn new(flags: impl Into<FlagSet<Flags>>) -> Container {
+ Container(flags.into())
+ }
+}
+
+assert_eq!(Container::new(Flags::Foo | Flags::Bar).0.bits(), 0b011);
+assert_eq!(Container::new(Flags::Foo).0.bits(), 0b001);
+assert_eq!(Container::new(None).0.bits(), 0b000);
+```
+
+## Operations
+
+Operations can be performed on a `FlagSet<F>` or on individual flags:
+
+| Operator | Assignment Operator | Meaning |
+|----------|---------------------|------------------------|
+| \| | \|= | Union |
+| & | &= | Intersection |
+| ^ | ^= | Toggle specified flags |
+| - | -= | Difference |
+| % | %= | Symmetric difference |
+| ! | | Toggle all flags |
+
+## Optional Serde support
+
+[Serde] support can be enabled with the 'serde' feature flag. You can then serialize and
+deserialize `FlagSet<T>` to and from any of the [supported formats]:
+
+ ```rust
+ use flagset::{FlagSet, flags};
+
+ flags! {
+ enum Flags: u8 {
+ Foo,
+ Bar,
+ }
+ }
+
+ let flagset = Flags::Foo | Flags::Bar;
+ let json = serde_json::to_string(&flagset).unwrap();
+ let flagset: FlagSet<Flags> = serde_json::from_str(&json).unwrap();
+ assert_eq!(flagset.bits(), 0b011);
+ ```
+
+For serialization and deserialization of flags enum itself, you can use the [`serde_repr`] crate
+(or implement `serde::ser::Serialize` and `serde:de::Deserialize` manually), combined with the
+appropriate `repr` attribute:
+
+ ```rust
+ use flagset::{FlagSet, flags};
+ use serde_repr::{Serialize_repr, Deserialize_repr};
+
+ flags! {
+ #[repr(u8)]
+ #[derive(Deserialize_repr, Serialize_repr)]
+ enum Flags: u8 {
+ Foo,
+ Bar,
+ }
+ }
+
+ let json = serde_json::to_string(&Flags::Foo).unwrap();
+ let flag: Flags = serde_json::from_str(&json).unwrap();
+ assert_eq!(flag, Flags::Foo);
+ ```
+
+[Serde]: https://serde.rs/
+[supported formats]: https://serde.rs/#data-formats
+[`serde_repr`]: https://crates.io/crates/serde_repr
diff --git a/third_party/rust/flagset/src/lib.rs b/third_party/rust/flagset/src/lib.rs
new file mode 100644
index 0000000000..220af6ba75
--- /dev/null
+++ b/third_party/rust/flagset/src/lib.rs
@@ -0,0 +1,1286 @@
+//
+// Copyright 2019 Red Hat, Inc.
+//
+// Author: Nathaniel McCallum <npmccallum@redhat.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+//! # Welcome to FlagSet!
+//!
+//! FlagSet is a new, ergonomic approach to handling flags that combines the
+//! best of existing crates like `bitflags` and `enumflags` without their
+//! downsides.
+//!
+//! ## Existing Implementations
+//!
+//! The `bitflags` crate has long been part of the Rust ecosystem.
+//! Unfortunately, it doesn't feel like natural Rust. The `bitflags` crate
+//! uses a wierd struct format to define flags. Flags themselves are just
+//! integers constants, so there is little type-safety involved. But it doesn't
+//! have any dependencies. It also allows you to define implied flags (otherwise
+//! known as overlapping flags).
+//!
+//! The `enumflags` crate tried to improve on `bitflags` by using enumerations
+//! to define flags. This was a big improvement to the natural feel of the code.
+//! Unfortunately, there are some design flaws. To generate the flags,
+//! procedural macros were used. This implied two separate crates plus
+//! additional dependencies. Further, `enumflags` specifies the size of the
+//! flags using a `repr($size)` attribute. Unfortunately, this attribute
+//! cannot resolve type aliases, such as `c_int`. This makes `enumflags` a
+//! poor fit for FFI, which is the most important place for a flags library.
+//! The `enumflags` crate also disallows overlapping flags and is not
+//! maintained.
+//!
+//! FlagSet improves on both of these by adopting the `enumflags` natural feel
+//! and the `bitflags` mode of flag generation; as well as additional API usage
+//! niceties. FlagSet has no dependencies and is extensively documented and
+//! tested. It also tries very hard to prevent you from making mistakes by
+//! avoiding external usage of the integer types. FlagSet is also a zero-cost
+//! abstraction: all functions are inlineable and should reduce to the core
+//! integer operations. FlagSet also does not depend on stdlib, so it can be
+//! used in `no_std` libraries and applications.
+//!
+//! ## Defining Flags
+//!
+//! Flags are defined using the `flags!` macro:
+//!
+//! ```
+//! use flagset::{FlagSet, flags};
+//! use std::os::raw::c_int;
+//!
+//! flags! {
+//! enum FlagsA: u8 {
+//! Foo,
+//! Bar,
+//! Baz,
+//! }
+//!
+//! enum FlagsB: c_int {
+//! Foo,
+//! Bar,
+//! Baz,
+//! }
+//! }
+//! ```
+//!
+//! Notice that a flag definition looks just like a regular enumeration, with
+//! the addition of the field-size type. The field-size type is required and
+//! can be either a type or a type alias. Both examples are given above.
+//!
+//! Also note that the field-size type specifies the size of the corresponding
+//! `FlagSet` type, not size of the enumeration itself. To specify the size of
+//! the enumeration, use the `repr($size)` attribute as specified below.
+//!
+//! ## Flag Values
+//!
+//! Flags often need values assigned to them. This can be done implicitly,
+//! where the value depends on the order of the flags:
+//!
+//! ```
+//! use flagset::{FlagSet, flags};
+//!
+//! flags! {
+//! enum Flags: u16 {
+//! Foo, // Implicit Value: 0b0001
+//! Bar, // Implicit Value: 0b0010
+//! Baz, // Implicit Value: 0b0100
+//! }
+//! }
+//! ```
+//!
+//! Alternatively, flag values can be defined explicitly, by specifying any
+//! `const` expression:
+//!
+//! ```
+//! use flagset::{FlagSet, flags};
+//!
+//! flags! {
+//! enum Flags: u16 {
+//! Foo = 0x01, // Explicit Value: 0b0001
+//! Bar = 2, // Explicit Value: 0b0010
+//! Baz = 0b0100, // Explicit Value: 0b0100
+//! }
+//! }
+//! ```
+//!
+//! Flags can also overlap or "imply" other flags:
+//!
+//! ```
+//! use flagset::{FlagSet, flags};
+//!
+//! flags! {
+//! enum Flags: u16 {
+//! Foo = 0b0001,
+//! Bar = 0b0010,
+//! Baz = 0b0110, // Implies Bar
+//! All = (Flags::Foo | Flags::Bar | Flags::Baz).bits(),
+//! }
+//! }
+//! ```
+//!
+//! ## Specifying Attributes
+//!
+//! Attributes can be used on the enumeration itself or any of the values:
+//!
+//! ```
+//! use flagset::{FlagSet, flags};
+//!
+//! flags! {
+//! #[derive(PartialOrd, Ord)]
+//! enum Flags: u8 {
+//! Foo,
+//! #[deprecated]
+//! Bar,
+//! Baz,
+//! }
+//! }
+//! ```
+//!
+//! ## Collections of Flags
+//!
+//! A collection of flags is a `FlagSet<T>`. If you are storing the flags in
+//! memory, the raw `FlagSet<T>` type should be used. However, if you want to
+//! receive flags as an input to a function, you should use
+//! `impl Into<FlagSet<T>>`. This allows for very ergonomic APIs:
+//!
+//! ```
+//! use flagset::{FlagSet, flags};
+//!
+//! flags! {
+//! enum Flags: u8 {
+//! Foo,
+//! Bar,
+//! Baz,
+//! }
+//! }
+//!
+//! struct Container(FlagSet<Flags>);
+//!
+//! impl Container {
+//! fn new(flags: impl Into<FlagSet<Flags>>) -> Container {
+//! Container(flags.into())
+//! }
+//! }
+//!
+//! assert_eq!(Container::new(Flags::Foo | Flags::Bar).0.bits(), 0b011);
+//! assert_eq!(Container::new(Flags::Foo).0.bits(), 0b001);
+//! assert_eq!(Container::new(None).0.bits(), 0b000);
+//! ```
+//!
+//! ## Operations
+//!
+//! Operations can be performed on a `FlagSet<F>` or on individual flags:
+//!
+//! | Operator | Assignment Operator | Meaning |
+//! |----------|---------------------|------------------------|
+//! | \| | \|= | Union |
+//! | & | &= | Intersection |
+//! | ^ | ^= | Toggle specified flags |
+//! | - | -= | Difference |
+//! | % | %= | Symmetric difference |
+//! | ! | | Toggle all flags |
+//!
+#![cfg_attr(
+ feature = "serde",
+ doc = r#"
+
+## Optional Serde support
+
+[Serde] support can be enabled with the 'serde' feature flag. You can then serialize and
+deserialize `FlagSet<T>` to and from any of the [supported formats]:
+
+ ```
+ use flagset::{FlagSet, flags};
+
+ flags! {
+ enum Flags: u8 {
+ Foo,
+ Bar,
+ }
+ }
+
+ let flagset = Flags::Foo | Flags::Bar;
+ let json = serde_json::to_string(&flagset).unwrap();
+ let flagset: FlagSet<Flags> = serde_json::from_str(&json).unwrap();
+ assert_eq!(flagset.bits(), 0b011);
+ ```
+
+For serialization and deserialization of flags enum itself, you can use the [`serde_repr`] crate
+(or implement `serde::ser::Serialize` and `serde:de::Deserialize` manually), combined with the
+appropriate `repr` attribute:
+
+ ```
+ use flagset::{FlagSet, flags};
+ use serde_repr::{Serialize_repr, Deserialize_repr};
+
+ flags! {
+ #[repr(u8)]
+ #[derive(Deserialize_repr, Serialize_repr)]
+ enum Flags: u8 {
+ Foo,
+ Bar,
+ }
+ }
+
+ let json = serde_json::to_string(&Flags::Foo).unwrap();
+ let flag: Flags = serde_json::from_str(&json).unwrap();
+ assert_eq!(flag, Flags::Foo);
+ ```
+
+[Serde]: https://serde.rs/
+[supported formats]: https://serde.rs/#data-formats
+[`serde_repr`]: https://crates.io/crates/serde_repr
+"#
+)]
+#![allow(unknown_lints)]
+#![warn(clippy::all)]
+#![no_std]
+
+use core::fmt::{Debug, Formatter, Result};
+use core::ops::*;
+
+/// Error type returned when creating a new flagset from bits is invalid or undefined.
+/// ```
+/// use flagset::{FlagSet, flags};
+///
+/// flags! {
+/// pub enum Flag: u16 {
+/// Foo = 0b0001,
+/// Bar = 0b0010,
+/// Baz = 0b0100,
+/// Qux = 0b1010, // Implies Bar
+/// }
+/// }
+///
+/// assert_eq!(FlagSet::<Flag>::new(0b01101), Err(flagset::InvalidBits)); // Invalid
+/// assert_eq!(FlagSet::<Flag>::new(0b10101), Err(flagset::InvalidBits)); // Unknown
+/// ```
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct InvalidBits;
+
+impl core::fmt::Display for InvalidBits {
+ #[inline]
+ fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+ write!(f, "invalid bits")
+ }
+}
+
+#[doc(hidden)]
+pub trait Flags:
+ Copy
+ + Clone
+ + Debug
+ + PartialEq
+ + Eq
+ + BitAnd<Self, Output = FlagSet<Self>>
+ + BitOr<Self, Output = FlagSet<Self>>
+ + BitXor<Self, Output = FlagSet<Self>>
+ + Sub<Self, Output = FlagSet<Self>>
+ + Rem<Self, Output = FlagSet<Self>>
+ + Not<Output = FlagSet<Self>>
+ + Into<FlagSet<Self>>
+ + 'static
+{
+ type Type: Copy
+ + Clone
+ + Debug
+ + PartialEq
+ + Eq
+ + Default
+ + BitAnd<Self::Type, Output = Self::Type>
+ + BitAndAssign<Self::Type>
+ + BitOr<Self::Type, Output = Self::Type>
+ + BitOrAssign<Self::Type>
+ + BitXor<Self::Type, Output = Self::Type>
+ + BitXorAssign<Self::Type>
+ + Not<Output = Self::Type>;
+
+ /// A slice containing all the possible flag values.
+ const LIST: &'static [Self];
+
+ /// Creates an empty `FlagSet` of this type
+ #[inline]
+ fn none() -> FlagSet<Self> {
+ FlagSet::default()
+ }
+}
+
+#[derive(Copy, Clone, Eq)]
+pub struct FlagSet<F: Flags>(F::Type);
+
+#[doc(hidden)]
+#[derive(Copy, Clone)]
+pub struct Iter<F: Flags>(FlagSet<F>, usize);
+
+impl<F: Flags> Iterator for Iter<F> {
+ type Item = F;
+
+ #[inline]
+ fn next(&mut self) -> Option<Self::Item> {
+ while self.1 < F::LIST.len() {
+ let next = F::LIST[self.1];
+ self.1 += 1;
+
+ if self.0.contains(next) {
+ return Some(next);
+ }
+ }
+
+ None
+ }
+}
+
+impl<F: Flags> IntoIterator for FlagSet<F> {
+ type Item = F;
+ type IntoIter = Iter<F>;
+
+ /// Iterate over the flags in the set.
+ ///
+ /// **NOTE**: The order in which the flags are iterated is undefined.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u8 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let set = Flag::Foo | Flag::Bar;
+ /// let mut iter = set.into_iter();
+ /// assert_eq!(iter.next(), Some(Flag::Foo));
+ /// assert_eq!(iter.next(), Some(Flag::Bar));
+ /// assert_eq!(iter.next(), None);
+ /// ```
+ #[inline]
+ fn into_iter(self) -> Self::IntoIter {
+ Iter(self, 0)
+ }
+}
+
+impl<F: Flags> Debug for FlagSet<F> {
+ #[inline]
+ fn fmt(&self, f: &mut Formatter) -> Result {
+ write!(f, "FlagSet(")?;
+ for (i, flag) in self.into_iter().enumerate() {
+ write!(f, "{}{:?}", if i > 0 { " | " } else { "" }, flag)?;
+ }
+ write!(f, ")")
+ }
+}
+
+impl<F: Flags, R: Copy + Into<FlagSet<F>>> PartialEq<R> for FlagSet<F> {
+ #[inline]
+ fn eq(&self, rhs: &R) -> bool {
+ self.0 == (*rhs).into().0
+ }
+}
+
+impl<F: Flags> AsRef<F::Type> for FlagSet<F> {
+ #[inline]
+ fn as_ref(&self) -> &F::Type {
+ &self.0
+ }
+}
+
+impl<F: Flags> From<Option<FlagSet<F>>> for FlagSet<F> {
+ /// Converts from `Option<FlagSet<F>>` to `FlagSet<F>`.
+ ///
+ /// Most notably, this allows for the use of `None` in many places to
+ /// substitute for manually creating an empty `FlagSet<F>`. See below.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u8 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// fn convert(v: impl Into<FlagSet<Flag>>) -> u8 {
+ /// v.into().bits()
+ /// }
+ ///
+ /// assert_eq!(convert(Flag::Foo | Flag::Bar), 0b011);
+ /// assert_eq!(convert(Flag::Foo), 0b001);
+ /// assert_eq!(convert(None), 0b000);
+ /// ```
+ #[inline]
+ fn from(value: Option<FlagSet<F>>) -> FlagSet<F> {
+ value.unwrap_or_default()
+ }
+}
+
+impl<F: Flags> Default for FlagSet<F> {
+ /// Creates a new, empty FlagSet.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u8 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let set = FlagSet::<Flag>::default();
+ /// assert!(set.is_empty());
+ /// assert!(!set.is_full());
+ /// assert!(!set.contains(Flag::Foo));
+ /// assert!(!set.contains(Flag::Bar));
+ /// assert!(!set.contains(Flag::Baz));
+ /// ```
+ #[inline]
+ fn default() -> Self {
+ FlagSet(F::Type::default())
+ }
+}
+
+impl<F: Flags> Not for FlagSet<F> {
+ type Output = Self;
+
+ /// Calculates the complement of the current set.
+ ///
+ /// In common parlance, this returns the set of all possible flags that are
+ /// not in the current set.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// #[derive(PartialOrd, Ord)]
+ /// enum Flag: u8 {
+ /// Foo = 1 << 0,
+ /// Bar = 1 << 1,
+ /// Baz = 1 << 2
+ /// }
+ /// }
+ ///
+ /// let set = !FlagSet::from(Flag::Foo);
+ /// assert!(!set.is_empty());
+ /// assert!(!set.is_full());
+ /// assert!(!set.contains(Flag::Foo));
+ /// assert!(set.contains(Flag::Bar));
+ /// assert!(set.contains(Flag::Baz));
+ /// ```
+ #[inline]
+ fn not(self) -> Self {
+ FlagSet(!self.0)
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> BitAnd<R> for FlagSet<F> {
+ type Output = Self;
+
+ /// Calculates the intersection of the current set and the specified flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// #[derive(PartialOrd, Ord)]
+ /// pub enum Flag: u8 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let set0 = Flag::Foo | Flag::Bar;
+ /// let set1 = Flag::Baz | Flag::Bar;
+ /// assert_eq!(set0 & set1, Flag::Bar);
+ /// assert_eq!(set0 & Flag::Foo, Flag::Foo);
+ /// assert_eq!(set1 & Flag::Baz, Flag::Baz);
+ /// ```
+ #[inline]
+ fn bitand(self, rhs: R) -> Self {
+ FlagSet(self.0 & rhs.into().0)
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> BitAndAssign<R> for FlagSet<F> {
+ /// Assigns the intersection of the current set and the specified flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u64 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let mut set0 = Flag::Foo | Flag::Bar;
+ /// let mut set1 = Flag::Baz | Flag::Bar;
+ ///
+ /// set0 &= set1;
+ /// assert_eq!(set0, Flag::Bar);
+ ///
+ /// set1 &= Flag::Baz;
+ /// assert_eq!(set0, Flag::Bar);
+ /// ```
+ #[inline]
+ fn bitand_assign(&mut self, rhs: R) {
+ self.0 &= rhs.into().0
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> BitOr<R> for FlagSet<F> {
+ type Output = Self;
+
+ /// Calculates the union of the current set with the specified flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// #[derive(PartialOrd, Ord)]
+ /// pub enum Flag: u8 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let set0 = Flag::Foo | Flag::Bar;
+ /// let set1 = Flag::Baz | Flag::Bar;
+ /// assert_eq!(set0 | set1, FlagSet::full());
+ /// ```
+ #[inline]
+ fn bitor(self, rhs: R) -> Self {
+ FlagSet(self.0 | rhs.into().0)
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> BitOrAssign<R> for FlagSet<F> {
+ /// Assigns the union of the current set with the specified flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u64 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let mut set0 = Flag::Foo | Flag::Bar;
+ /// let mut set1 = Flag::Bar | Flag::Baz;
+ ///
+ /// set0 |= set1;
+ /// assert_eq!(set0, FlagSet::full());
+ ///
+ /// set1 |= Flag::Baz;
+ /// assert_eq!(set1, Flag::Bar | Flag::Baz);
+ /// ```
+ #[inline]
+ fn bitor_assign(&mut self, rhs: R) {
+ self.0 |= rhs.into().0
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> BitXor<R> for FlagSet<F> {
+ type Output = Self;
+
+ /// Calculates the current set with the specified flags toggled.
+ ///
+ /// This is commonly known as toggling the presence
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u32 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let set0 = Flag::Foo | Flag::Bar;
+ /// let set1 = Flag::Baz | Flag::Bar;
+ /// assert_eq!(set0 ^ set1, Flag::Foo | Flag::Baz);
+ /// assert_eq!(set0 ^ Flag::Foo, Flag::Bar);
+ /// ```
+ #[inline]
+ fn bitxor(self, rhs: R) -> Self {
+ FlagSet(self.0 ^ rhs.into().0)
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> BitXorAssign<R> for FlagSet<F> {
+ /// Assigns the current set with the specified flags toggled.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// enum Flag: u16 {
+ /// Foo = 0b001,
+ /// Bar = 0b010,
+ /// Baz = 0b100
+ /// }
+ /// }
+ ///
+ /// let mut set0 = Flag::Foo | Flag::Bar;
+ /// let mut set1 = Flag::Baz | Flag::Bar;
+ ///
+ /// set0 ^= set1;
+ /// assert_eq!(set0, Flag::Foo | Flag::Baz);
+ ///
+ /// set1 ^= Flag::Baz;
+ /// assert_eq!(set1, Flag::Bar);
+ /// ```
+ #[inline]
+ fn bitxor_assign(&mut self, rhs: R) {
+ self.0 ^= rhs.into().0
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> Sub<R> for FlagSet<F> {
+ type Output = Self;
+
+ /// Calculates set difference (the current set without the specified flags).
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let set0 = Flag::Foo | Flag::Bar;
+ /// let set1 = Flag::Baz | Flag::Bar;
+ /// assert_eq!(set0 - set1, Flag::Foo);
+ /// ```
+ #[inline]
+ fn sub(self, rhs: R) -> Self {
+ self & !rhs.into()
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> SubAssign<R> for FlagSet<F> {
+ /// Assigns set difference (the current set without the specified flags).
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set0 = Flag::Foo | Flag::Bar;
+ /// set0 -= Flag::Baz | Flag::Bar;
+ /// assert_eq!(set0, Flag::Foo);
+ /// ```
+ #[inline]
+ fn sub_assign(&mut self, rhs: R) {
+ *self &= !rhs.into();
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> Rem<R> for FlagSet<F> {
+ type Output = Self;
+
+ /// Calculates the symmetric difference between two sets.
+ ///
+ /// The symmetric difference between two sets is the set of all flags
+ /// that appear in one set or the other, but not both.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let set0 = Flag::Foo | Flag::Bar;
+ /// let set1 = Flag::Baz | Flag::Bar;
+ /// assert_eq!(set0 % set1, Flag::Foo | Flag::Baz);
+ /// ```
+ #[inline]
+ fn rem(self, rhs: R) -> Self {
+ let rhs = rhs.into();
+ (self - rhs) | (rhs - self)
+ }
+}
+
+impl<F: Flags, R: Into<FlagSet<F>>> RemAssign<R> for FlagSet<F> {
+ /// Assigns the symmetric difference between two sets.
+ ///
+ /// The symmetric difference between two sets is the set of all flags
+ /// that appear in one set or the other, but not both.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set0 = Flag::Foo | Flag::Bar;
+ /// let set1 = Flag::Baz | Flag::Bar;
+ /// set0 %= set1;
+ /// assert_eq!(set0, Flag::Foo | Flag::Baz);
+ /// ```
+ #[inline]
+ fn rem_assign(&mut self, rhs: R) {
+ *self = *self % rhs
+ }
+}
+
+impl<F: Flags> FlagSet<F> {
+ /// Creates a new set from bits; returning `Err(InvalidBits)` on invalid/unknown bits.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u16 {
+ /// Foo = 0b0001,
+ /// Bar = 0b0010,
+ /// Baz = 0b0100,
+ /// Qux = 0b1010, // Implies Bar
+ /// }
+ /// }
+ ///
+ /// assert_eq!(FlagSet::<Flag>::new(0b00101), Ok(Flag::Foo | Flag::Baz));
+ /// assert_eq!(FlagSet::<Flag>::new(0b01101), Err(flagset::InvalidBits)); // Invalid
+ /// assert_eq!(FlagSet::<Flag>::new(0b10101), Err(flagset::InvalidBits)); // Unknown
+ /// ```
+ #[inline]
+ pub fn new(bits: F::Type) -> core::result::Result<Self, InvalidBits> {
+ if Self::new_truncated(bits).0 == bits {
+ return Ok(FlagSet(bits));
+ }
+
+ Err(InvalidBits)
+ }
+
+ /// Creates a new set from bits; truncating invalid/unknown bits.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u16 {
+ /// Foo = 0b0001,
+ /// Bar = 0b0010,
+ /// Baz = 0b0100,
+ /// Qux = 0b1010, // Implies Bar
+ /// }
+ /// }
+ ///
+ /// let set = FlagSet::new_truncated(0b11101); // Has invalid and unknown.
+ /// assert_eq!(set, Flag::Foo | Flag::Baz);
+ /// assert_eq!(set.bits(), 0b00101); // Has neither.
+ /// ```
+ #[inline]
+ pub fn new_truncated(bits: F::Type) -> Self {
+ let mut set = Self::default();
+
+ for flag in FlagSet::<F>(bits) {
+ set |= flag;
+ }
+
+ set
+ }
+
+ /// Creates a new set from bits; use of invalid/unknown bits is undefined.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u16 {
+ /// Foo = 0b0001,
+ /// Bar = 0b0010,
+ /// Baz = 0b0100,
+ /// Qux = 0b1010, // Implies Bar
+ /// }
+ /// }
+ ///
+ /// // Unknown and invalid bits are retained. Behavior is undefined.
+ /// let set = unsafe { FlagSet::<Flag>::new_unchecked(0b11101) };
+ /// assert_eq!(set.bits(), 0b11101);
+ /// ```
+ ///
+ /// # Safety
+ ///
+ /// This constructor doesn't check that the bits are valid. If you pass
+ /// undefined flags, undefined behavior may result.
+ #[inline]
+ pub unsafe fn new_unchecked(bits: F::Type) -> Self {
+ FlagSet(bits)
+ }
+
+ /// Creates a new FlagSet containing all possible flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let set = FlagSet::full();
+ /// assert!(!set.is_empty());
+ /// assert!(set.is_full());
+ /// assert!(set.contains(Flag::Foo));
+ /// assert!(set.contains(Flag::Bar));
+ /// assert!(set.contains(Flag::Baz));
+ /// ```
+ #[inline]
+ pub fn full() -> Self {
+ let mut set = Self::default();
+ for f in F::LIST {
+ set |= *f
+ }
+ set
+ }
+
+ /// Returns the raw bits of the set.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u16 {
+ /// Foo = 0b0001,
+ /// Bar = 0b0010,
+ /// Baz = 0b0100,
+ /// }
+ /// }
+ ///
+ /// let set = Flag::Foo | Flag::Baz;
+ /// assert_eq!(set.bits(), 0b0101u16);
+ /// ```
+ #[inline]
+ pub fn bits(self) -> F::Type {
+ self.0
+ }
+
+ /// Returns true if the FlagSet contains no flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set = Flag::Foo | Flag::Bar;
+ /// assert!(!set.is_empty());
+ ///
+ /// set &= Flag::Baz;
+ /// assert!(set.is_empty());
+ /// ```
+ #[inline]
+ pub fn is_empty(self) -> bool {
+ self == Self::default()
+ }
+
+ /// Returns true if the FlagSet contains all possible flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set = Flag::Foo | Flag::Bar;
+ /// assert!(!set.is_full());
+ ///
+ /// set |= Flag::Baz;
+ /// assert!(set.is_full());
+ /// ```
+ #[inline]
+ pub fn is_full(self) -> bool {
+ self == Self::full()
+ }
+
+ /// Returns true if the two `FlagSet`s do not share any flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let set = Flag::Foo | Flag::Bar;
+ /// assert!(!set.is_disjoint(Flag::Foo));
+ /// assert!(!set.is_disjoint(Flag::Foo | Flag::Baz));
+ /// assert!(set.is_disjoint(Flag::Baz));
+ /// ```
+ #[inline]
+ pub fn is_disjoint(self, rhs: impl Into<FlagSet<F>>) -> bool {
+ self & rhs == Self::default()
+ }
+
+ /// Returns true if this FlagSet is a superset of the specified flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let set = Flag::Foo | Flag::Bar;
+ /// assert!(set.contains(Flag::Foo));
+ /// assert!(set.contains(Flag::Foo | Flag::Bar));
+ /// assert!(!set.contains(Flag::Foo | Flag::Bar | Flag::Baz));
+ /// ```
+ #[inline]
+ pub fn contains(self, rhs: impl Into<FlagSet<F>>) -> bool {
+ let rhs = rhs.into();
+ self & rhs == rhs
+ }
+
+ /// Removes all flags from the FlagSet.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set = Flag::Foo | Flag::Bar;
+ /// assert!(!set.is_empty());
+ ///
+ /// set.clear();
+ /// assert!(set.is_empty());
+ /// ```
+ #[inline]
+ pub fn clear(&mut self) {
+ *self = Self::default();
+ }
+
+ /// Clears the current set and returns an iterator of all removed flags.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set = Flag::Foo | Flag::Bar;
+ /// let mut iter = set.drain();
+ /// assert!(set.is_empty());
+ /// assert_eq!(iter.next(), Some(Flag::Foo));
+ /// assert_eq!(iter.next(), Some(Flag::Bar));
+ /// assert_eq!(iter.next(), None);
+ /// ```
+ #[inline]
+ pub fn drain(&mut self) -> Iter<F> {
+ let iter = self.into_iter();
+ *self = Self::default();
+ iter
+ }
+
+ /// Retain only the flags flags specified by the predicate.
+ ///
+ /// ```
+ /// use flagset::{FlagSet, flags};
+ ///
+ /// flags! {
+ /// pub enum Flag: u8 {
+ /// Foo = 1,
+ /// Bar = 2,
+ /// Baz = 4
+ /// }
+ /// }
+ ///
+ /// let mut set0 = Flag::Foo | Flag::Bar;
+ /// set0.retain(|f| f != Flag::Foo);
+ /// assert_eq!(set0, Flag::Bar);
+ /// ```
+ #[inline]
+ pub fn retain(&mut self, func: impl Fn(F) -> bool) {
+ for f in self.into_iter() {
+ if !func(f) {
+ *self -= f
+ }
+ }
+ }
+}
+
+#[cfg(feature = "serde")]
+impl<F: Flags> serde::Serialize for FlagSet<F>
+where
+ F::Type: serde::ser::Serialize,
+{
+ #[inline]
+ fn serialize<S>(&self, serializer: S) -> core::result::Result<S::Ok, S::Error>
+ where
+ S: serde::ser::Serializer,
+ {
+ self.0.serialize(serializer)
+ }
+}
+
+#[cfg(feature = "serde")]
+impl<'de, F: Flags> serde::Deserialize<'de> for FlagSet<F>
+where
+ F::Type: serde::de::Deserialize<'de>,
+{
+ #[inline]
+ fn deserialize<D>(deserializer: D) -> core::result::Result<Self, D::Error>
+ where
+ D: serde::de::Deserializer<'de>,
+ {
+ Ok(FlagSet(F::Type::deserialize(deserializer)?))
+ }
+}
+
+/// Define flag value using the `enum` syntax. See below for details.
+///
+/// Each enumeration value **MUST** have a specified value.
+///
+/// The width of the bitfield **MUST** also be specified by its integer type.
+///
+/// It is important to note that the size of the flag enumeration itself is
+/// unrelated to the size of the corresponding `FlagSet` instance.
+///
+/// It is also worth noting that this macro automatically implements a variety
+/// of standard traits including:
+/// * Copy
+/// * Clone
+/// * Debug
+/// * PartialEq
+/// * Eq
+/// * From<$enum> for $integer
+/// * Not
+/// * BitAnd
+/// * BitOr
+/// * BitXor
+/// * Sub
+/// * Rem
+///
+/// ```
+/// use std::mem::{align_of, size_of};
+/// use flagset::{FlagSet, flags};
+///
+/// flags! {
+/// enum FlagEmpty: u32 {}
+///
+/// enum Flag8: u8 {
+/// Foo = 0b001,
+/// Bar = 0b010,
+/// Baz = 0b100
+/// }
+///
+/// pub enum Flag16: u16 {
+/// Foo,
+/// Bar,
+/// #[deprecated]
+/// Baz,
+/// }
+///
+/// #[derive(PartialOrd, Ord)]
+/// enum Flag32: u32 {
+/// Foo = 0b001,
+/// #[deprecated]
+/// Bar = 0b010,
+/// Baz = 0b100
+/// }
+///
+/// #[repr(u64)]
+/// enum Flag64: u64 {
+/// Foo = 0b001,
+/// Bar = 0b010,
+/// Baz = 0b100
+/// }
+///
+/// #[repr(u32)]
+/// enum Flag128: u128 {
+/// Foo = 0b001,
+/// Bar = 0b010,
+/// Baz = 0b100
+/// }
+/// }
+///
+/// assert_eq!(size_of::<Flag8>(), 1);
+/// assert_eq!(size_of::<Flag16>(), 1);
+/// assert_eq!(size_of::<Flag32>(), 1);
+/// assert_eq!(size_of::<Flag64>(), 8);
+/// assert_eq!(size_of::<Flag128>(), 4);
+///
+/// assert_eq!(align_of::<Flag8>(), 1);
+/// assert_eq!(align_of::<Flag16>(), 1);
+/// assert_eq!(align_of::<Flag32>(), 1);
+/// assert_eq!(align_of::<Flag64>(), align_of::<u64>());
+/// assert_eq!(align_of::<Flag128>(), align_of::<u32>());
+///
+/// assert_eq!(size_of::<FlagSet<Flag8>>(), size_of::<u8>());
+/// assert_eq!(size_of::<FlagSet<Flag16>>(), size_of::<u16>());
+/// assert_eq!(size_of::<FlagSet<Flag32>>(), size_of::<u32>());
+/// assert_eq!(size_of::<FlagSet<Flag64>>(), size_of::<u64>());
+/// assert_eq!(size_of::<FlagSet<Flag128>>(), size_of::<u128>());
+///
+/// assert_eq!(align_of::<FlagSet<Flag8>>(), align_of::<u8>());
+/// assert_eq!(align_of::<FlagSet<Flag16>>(), align_of::<u16>());
+/// assert_eq!(align_of::<FlagSet<Flag32>>(), align_of::<u32>());
+/// assert_eq!(align_of::<FlagSet<Flag64>>(), align_of::<u64>());
+/// assert_eq!(align_of::<FlagSet<Flag128>>(), align_of::<u128>());
+/// ```
+#[macro_export]
+macro_rules! flags {
+ () => {};
+
+ // Entry point for enumerations without values.
+ ($(#[$m:meta])* $p:vis enum $n:ident: $t:ty { $($(#[$a:meta])* $k:ident),+ $(,)* } $($next:tt)*) => {
+ $crate::flags! { $(#[$m])* $p enum $n: $t { $($(#[$a])* $k = (1 << $n::$k as $t)),+ } $($next)* }
+ };
+
+ // Entrypoint for enumerations with values.
+ ($(#[$m:meta])* $p:vis enum $n:ident: $t:ty { $($(#[$a:meta])*$k:ident = $v:expr),* $(,)* } $($next:tt)*) => {
+ $(#[$m])*
+ #[derive(Copy, Clone, Debug, PartialEq, Eq)]
+ $p enum $n { $($(#[$a])* $k),* }
+
+ impl $crate::Flags for $n {
+ type Type = $t;
+
+ const LIST: &'static [Self] = &[$($n::$k),*];
+ }
+
+ impl core::convert::From<$n> for $crate::FlagSet<$n> {
+ #[inline]
+ fn from(value: $n) -> Self {
+ unsafe {
+ match value {
+ $($n::$k => Self::new_unchecked($v)),*
+ }
+ }
+ }
+ }
+
+ impl core::ops::Not for $n {
+ type Output = $crate::FlagSet<$n>;
+
+ #[inline]
+ fn not(self) -> Self::Output {
+ !$crate::FlagSet::from(self)
+ }
+ }
+
+ impl<R: core::convert::Into<$crate::FlagSet<$n>>> core::ops::BitAnd<R> for $n {
+ type Output = $crate::FlagSet<$n>;
+
+ #[inline]
+ fn bitand(self, rhs: R) -> Self::Output {
+ $crate::FlagSet::from(self) & rhs
+ }
+ }
+
+ impl<R: core::convert::Into<$crate::FlagSet<$n>>> core::ops::BitOr<R> for $n {
+ type Output = $crate::FlagSet<$n>;
+
+ #[inline]
+ fn bitor(self, rhs: R) -> Self::Output {
+ $crate::FlagSet::from(self) | rhs
+ }
+ }
+
+ impl<R: core::convert::Into<$crate::FlagSet<$n>>> core::ops::BitXor<R> for $n {
+ type Output = $crate::FlagSet<$n>;
+
+ #[inline]
+ fn bitxor(self, rhs: R) -> Self::Output {
+ $crate::FlagSet::from(self) ^ rhs
+ }
+ }
+
+ impl<R: core::convert::Into<$crate::FlagSet<$n>>> core::ops::Sub<R> for $n {
+ type Output = $crate::FlagSet<$n>;
+
+ #[inline]
+ fn sub(self, rhs: R) -> Self::Output {
+ $crate::FlagSet::from(self) - rhs
+ }
+ }
+
+ impl<R: core::convert::Into<$crate::FlagSet<$n>>> core::ops::Rem<R> for $n {
+ type Output = $crate::FlagSet<$n>;
+
+ #[inline]
+ fn rem(self, rhs: R) -> Self::Output {
+ $crate::FlagSet::from(self) % rhs
+ }
+ }
+
+ $crate::flags! { $($next)* }
+ };
+}