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Merge pull request #2608 from osiewicz/extract_serde_core

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feat: Extract serde_core out of serde crate
This commit is contained in:
David Tolnay
2025-09-13 13:59:17 -07:00
committed by GitHub
parent 94acfe19e6 f9baf39dc3
commit 723fcacad7
27 changed files with 616 additions and 222 deletions
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Cargo.toml
+1
View File
@@ -1,6 +1,7 @@
[workspace]
members = [
"serde",
"serde_core",
"serde_derive",
"serde_derive_internals",
"test_suite",
serde/Cargo.toml
+13 -7
View File
@@ -15,16 +15,17 @@ repository = "https://github.com/serde-rs/serde"
rust-version = "1.56"
[dependencies]
serde_core = { version = "=1.0.219", path = "../serde_core", default-features = false }
serde_derive = { version = "1", optional = true, path = "../serde_derive" }
[dev-dependencies]
serde_derive = { version = "1", path = "../serde_derive" }
[package.metadata.playground]
features = ["derive", "rc"]
features = ["derive", "rc", "result"]
[package.metadata.docs.rs]
features = ["derive", "rc", "unstable"]
features = ["derive", "rc", "result", "unstable"]
targets = ["x86_64-unknown-linux-gnu"]
rustdoc-args = [
"--generate-link-to-definition",
@@ -45,27 +46,32 @@ serde_derive = { version = "=1.0.219", path = "../serde_derive" }
### FEATURES #################################################################
[features]
default = ["std"]
default = ["std", "result"]
# Provide derive(Serialize, Deserialize) macros.
derive = ["serde_derive"]
# Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
# Requires a dependency on the Rust standard library.
std = []
std = ["serde_core/std"]
# Provide impls for types that require unstable functionality. For tracking and
# discussion of unstable functionality please refer to this issue:
#
# https://github.com/serde-rs/serde/issues/812
unstable = []
unstable = ["serde_core/unstable"]
# Provide impls for types in the Rust core allocation and collections library
# including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may
# be enabled without depending on all of std.
alloc = []
alloc = ["serde_core/alloc"]
# Opt into impls for Rc<T> and Arc<T>. Serializing and deserializing these types
# does not preserve identity and may result in multiple copies of the same data.
# Be sure that this is what you want before enabling this feature.
rc = []
rc = ["serde_core/rc"]
# Provide impls for Result<T, E>. Enabling these impls allows for serialization
# and deserialization of Result types, which may be useful in certain contexts
# but could lead to confusion if ? or unwrap are overused.
result = ["serde_core/result"]
serde/build.rs
-62
View File
@@ -14,75 +14,13 @@ fn main() {
};
if minor >= 77 {
println!("cargo:rustc-check-cfg=cfg(no_core_cstr)");
println!("cargo:rustc-check-cfg=cfg(no_core_error)");
println!("cargo:rustc-check-cfg=cfg(no_core_net)");
println!("cargo:rustc-check-cfg=cfg(no_core_num_saturating)");
println!("cargo:rustc-check-cfg=cfg(no_diagnostic_namespace)");
println!("cargo:rustc-check-cfg=cfg(no_serde_derive)");
println!("cargo:rustc-check-cfg=cfg(no_std_atomic)");
println!("cargo:rustc-check-cfg=cfg(no_std_atomic64)");
println!("cargo:rustc-check-cfg=cfg(no_target_has_atomic)");
}
let target = env::var("TARGET").unwrap();
let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten";
// Support for #[cfg(target_has_atomic = "...")] stabilized in Rust 1.60.
if minor < 60 {
println!("cargo:rustc-cfg=no_target_has_atomic");
// Allowlist of archs that support std::sync::atomic module. This is
// based on rustc's compiler/rustc_target/src/spec/*.rs.
let has_atomic64 = target.starts_with("x86_64")
|| target.starts_with("i686")
|| target.starts_with("aarch64")
|| target.starts_with("powerpc64")
|| target.starts_with("sparc64")
|| target.starts_with("mips64el")
|| target.starts_with("riscv64");
let has_atomic32 = has_atomic64 || emscripten;
if minor < 34 || !has_atomic64 {
println!("cargo:rustc-cfg=no_std_atomic64");
}
if minor < 34 || !has_atomic32 {
println!("cargo:rustc-cfg=no_std_atomic");
}
}
// Current minimum supported version of serde_derive crate is Rust 1.61.
if minor < 61 {
println!("cargo:rustc-cfg=no_serde_derive");
}
// Support for core::ffi::CStr and alloc::ffi::CString stabilized in Rust 1.64.
// https://blog.rust-lang.org/2022/09/22/Rust-1.64.0.html#c-compatible-ffi-types-in-core-and-alloc
if minor < 64 {
println!("cargo:rustc-cfg=no_core_cstr");
}
// Support for core::num::Saturating and std::num::Saturating stabilized in Rust 1.74
// https://blog.rust-lang.org/2023/11/16/Rust-1.74.0.html#stabilized-apis
if minor < 74 {
println!("cargo:rustc-cfg=no_core_num_saturating");
}
// Support for core::net stabilized in Rust 1.77.
// https://blog.rust-lang.org/2024/03/21/Rust-1.77.0.html
if minor < 77 {
println!("cargo:rustc-cfg=no_core_net");
}
// Support for the `#[diagnostic]` tool attribute namespace
// https://blog.rust-lang.org/2024/05/02/Rust-1.78.0.html#diagnostic-attributes
if minor < 78 {
println!("cargo:rustc-cfg=no_diagnostic_namespace");
}
// The Error trait became available in core in 1.81.
// https://blog.rust-lang.org/2024/09/05/Rust-1.81.0.html#coreerrorerror
if minor < 81 {
println!("cargo:rustc-cfg=no_core_error");
}
}
fn rustc_minor_version() -> Option<u32> {
serde/src/lib.rs
+4 -93
View File
@@ -180,23 +180,18 @@ mod lib {
}
pub use self::core::{f32, f64};
pub use self::core::{iter, num, ptr, str};
pub use self::core::{ptr, str};
#[cfg(any(feature = "std", feature = "alloc"))]
pub use self::core::{cmp, mem, slice};
pub use self::core::slice;
pub use self::core::cell::{Cell, RefCell};
pub use self::core::clone;
pub use self::core::cmp::Reverse;
pub use self::core::convert;
pub use self::core::default;
pub use self::core::fmt::{self, Debug, Display, Write as FmtWrite};
pub use self::core::marker::{self, PhantomData};
pub use self::core::num::Wrapping;
pub use self::core::ops::{Bound, Range, RangeFrom, RangeInclusive, RangeTo};
pub use self::core::option;
pub use self::core::result;
pub use self::core::time::Duration;
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::borrow::{Cow, ToOwned};
@@ -218,83 +213,15 @@ mod lib {
#[cfg(feature = "std")]
pub use std::boxed::Box;
#[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
pub use alloc::rc::{Rc, Weak as RcWeak};
#[cfg(all(feature = "rc", feature = "std"))]
pub use std::rc::{Rc, Weak as RcWeak};
#[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
pub use alloc::sync::{Arc, Weak as ArcWeak};
#[cfg(all(feature = "rc", feature = "std"))]
pub use std::sync::{Arc, Weak as ArcWeak};
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
#[cfg(feature = "std")]
pub use std::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
#[cfg(all(not(no_core_cstr), not(feature = "std")))]
pub use self::core::ffi::CStr;
#[cfg(feature = "std")]
pub use std::ffi::CStr;
#[cfg(all(not(no_core_cstr), feature = "alloc", not(feature = "std")))]
pub use alloc::ffi::CString;
#[cfg(feature = "std")]
pub use std::ffi::CString;
#[cfg(all(not(no_core_net), not(feature = "std")))]
pub use self::core::net;
#[cfg(feature = "std")]
pub use std::net;
#[cfg(feature = "std")]
pub use std::error;
#[cfg(feature = "std")]
pub use std::collections::{HashMap, HashSet};
#[cfg(feature = "std")]
pub use std::ffi::{OsStr, OsString};
#[cfg(feature = "std")]
pub use std::hash::{BuildHasher, Hash};
#[cfg(feature = "std")]
pub use std::io::Write;
#[cfg(feature = "std")]
pub use std::path::{Path, PathBuf};
#[cfg(feature = "std")]
pub use std::sync::{Mutex, RwLock};
#[cfg(feature = "std")]
pub use std::time::{SystemTime, UNIX_EPOCH};
#[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic)))]
pub use std::sync::atomic::{
AtomicBool, AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicU16, AtomicU32, AtomicU8,
AtomicUsize, Ordering,
};
#[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic64)))]
pub use std::sync::atomic::{AtomicI64, AtomicU64};
#[cfg(all(feature = "std", not(no_target_has_atomic)))]
pub use std::sync::atomic::Ordering;
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "8"))]
pub use std::sync::atomic::{AtomicBool, AtomicI8, AtomicU8};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "16"))]
pub use std::sync::atomic::{AtomicI16, AtomicU16};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "32"))]
pub use std::sync::atomic::{AtomicI32, AtomicU32};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "64"))]
pub use std::sync::atomic::{AtomicI64, AtomicU64};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "ptr"))]
pub use std::sync::atomic::{AtomicIsize, AtomicUsize};
#[cfg(not(no_core_num_saturating))]
pub use self::core::num::Saturating;
}
// None of this crate's error handling needs the `From::from` error conversion
// performed implicitly by the `?` operator or the standard library's `try!`
// macro. This simplified macro gives a 5.5% improvement in compile time
// compared to standard `try!`, and 9% improvement compared to `?`.
#[allow(unused_macros)]
macro_rules! tri {
($expr:expr) => {
match $expr {
@@ -306,33 +233,17 @@ macro_rules! tri {
////////////////////////////////////////////////////////////////////////////////
#[macro_use]
mod macros;
#[macro_use]
mod integer128;
pub mod de;
pub mod ser;
mod format;
#[doc(inline)]
pub use crate::de::{Deserialize, Deserializer};
#[doc(inline)]
pub use crate::ser::{Serialize, Serializer};
pub use serde_core::*;
// Used by generated code and doc tests. Not public API.
#[doc(hidden)]
#[path = "private/mod.rs"]
pub mod __private;
#[path = "de/seed.rs"]
mod seed;
#[cfg(all(not(feature = "std"), no_core_error))]
mod std_error;
// Re-export #[derive(Serialize, Deserialize)].
//
// The reason re-exporting is not enabled by default is that disabling it would
serde/src/private/de.rs
+5 -21
View File
@@ -16,7 +16,7 @@ pub use self::content::{
TagOrContentField, TagOrContentFieldVisitor, TaggedContentVisitor, UntaggedUnitVisitor,
};
pub use crate::seed::InPlaceSeed;
pub use serde_core::de::InPlaceSeed;
/// If the missing field is of type `Option<T>` then treat is as `None`,
/// otherwise it is an error.
@@ -47,7 +47,7 @@ where
visitor.visit_none()
}
forward_to_deserialize_any! {
serde_core::forward_to_deserialize_any! {
bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
bytes byte_buf unit unit_struct newtype_struct seq tuple
tuple_struct map struct enum identifier ignored_any
@@ -297,7 +297,7 @@ mod content {
// Untagged and internally tagged enums are only supported in
// self-describing formats.
let visitor = ContentVisitor { value: PhantomData };
deserializer.__deserialize_content(visitor)
deserializer.deserialize_any(visitor)
}
}
@@ -1496,14 +1496,6 @@ mod content {
drop(self);
visitor.visit_unit()
}
fn __deserialize_content<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de, Value = Content<'de>>,
{
let _ = visitor;
Ok(self.content)
}
}
impl<'de, E> ContentDeserializer<'de, E> {
@@ -2085,14 +2077,6 @@ mod content {
{
visitor.visit_unit()
}
fn __deserialize_content<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de, Value = Content<'de>>,
{
let _ = visitor;
Ok(self.content.clone())
}
}
impl<'a, 'de, E> ContentRefDeserializer<'a, 'de, E> {
@@ -2397,7 +2381,7 @@ where
visitor.visit_str(self.value)
}
forward_to_deserialize_any! {
serde_core::forward_to_deserialize_any! {
bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
bytes byte_buf option unit unit_struct newtype_struct seq tuple
tuple_struct map struct enum identifier ignored_any
@@ -2422,7 +2406,7 @@ where
visitor.visit_borrowed_str(self.value)
}
forward_to_deserialize_any! {
serde_core::forward_to_deserialize_any! {
bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
bytes byte_buf option unit unit_struct newtype_struct seq tuple
tuple_struct map struct enum identifier ignored_any
serde/src/private/mod.rs
+1 -21
View File
@@ -21,25 +21,5 @@ pub use self::string::from_utf8_lossy;
pub use crate::lib::{ToString, Vec};
mod string {
use crate::lib::*;
#[cfg(any(feature = "std", feature = "alloc"))]
pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<str> {
String::from_utf8_lossy(bytes)
}
// The generated code calls this like:
//
// let value = &_serde::__private::from_utf8_lossy(bytes);
// Err(_serde::de::Error::unknown_variant(value, VARIANTS))
//
// so it is okay for the return type to be different from the std case as long
// as the above works.
#[cfg(not(any(feature = "std", feature = "alloc")))]
pub fn from_utf8_lossy(bytes: &[u8]) -> &str {
// Three unicode replacement characters if it fails. They look like a
// white-on-black question mark. The user will recognize it as invalid
// UTF-8.
str::from_utf8(bytes).unwrap_or("\u{fffd}\u{fffd}\u{fffd}")
}
pub use serde_core::from_utf8_lossy;
}
serde_core/Cargo.toml
+62
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@@ -0,0 +1,62 @@
[package]
name = "serde_core"
version = "1.0.219"
authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>", "David Tolnay <dtolnay@gmail.com>"]
build = "build.rs"
categories = ["encoding", "no-std", "no-std::no-alloc"]
description = "Core functionalities and abstractions for the Serde serialization/deserialization framework"
documentation = "https://docs.rs/serde_core"
edition = "2021"
homepage = "https://serde.rs"
keywords = ["serde", "serialization", "no_std"]
license = "MIT OR Apache-2.0"
readme = "crates-io.md"
repository = "https://github.com/serde-rs/serde"
rust-version = "1.56"
[dev-dependencies]
serde = { version = "1", path = "../serde" }
[package.metadata.playground]
features = ["rc", "result"]
[package.metadata.docs.rs]
features = ["rc", "result", "unstable"]
targets = ["x86_64-unknown-linux-gnu"]
rustdoc-args = [
"--generate-link-to-definition",
"--extern-html-root-url=core=https://doc.rust-lang.org",
"--extern-html-root-url=alloc=https://doc.rust-lang.org",
"--extern-html-root-url=std=https://doc.rust-lang.org",
]
### FEATURES #################################################################
[features]
default = ["std", "result"]
# Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
# Requires a dependency on the Rust standard library.
std = []
# Provide impls for types that require unstable functionality. For tracking and
# discussion of unstable functionality please refer to this issue:
#
# https://github.com/serde-rs/serde/issues/812
unstable = []
# Provide impls for types in the Rust core allocation and collections library
# including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may
# be enabled without depending on all of std.
alloc = []
# Opt into impls for Rc<T> and Arc<T>. Serializing and deserializing these types
# does not preserve identity and may result in multiple copies of the same data.
# Be sure that this is what you want before enabling this feature.
rc = []
# Provide impls for Result<T, E>. Enabling these impls allows for serialization
# and deserialization of Result types, which may be useful in certain contexts
# but could lead to confusion if ? or unwrap are overused.
result = []
serde_core/LICENSE-APACHE
Symlink
+1
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@@ -0,0 +1 @@
../LICENSE-APACHE
serde_core/LICENSE-MIT
Symlink
+1
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@@ -0,0 +1 @@
../LICENSE-MIT
serde_core/README.md
+114
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@@ -0,0 +1,114 @@
# Serde &emsp; [![Build Status]][actions] [![Latest Version]][crates.io] [![serde msrv]][Rust 1.56] [![serde_derive msrv]][Rust 1.61]
[Build Status]: https://img.shields.io/github/actions/workflow/status/serde-rs/serde/ci.yml?branch=master
[actions]: https://github.com/serde-rs/serde/actions?query=branch%3Amaster
[Latest Version]: https://img.shields.io/crates/v/serde.svg
[crates.io]: https://crates.io/crates/serde
[serde msrv]: https://img.shields.io/crates/msrv/serde.svg?label=serde%20msrv&color=lightgray
[serde_derive msrv]: https://img.shields.io/crates/msrv/serde_derive.svg?label=serde_derive%20msrv&color=lightgray
[Rust 1.56]: https://blog.rust-lang.org/2021/10/21/Rust-1.56.0.html
[Rust 1.61]: https://blog.rust-lang.org/2022/05/19/Rust-1.61.0.html
**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
---
You may be looking for:
- [An overview of Serde](https://serde.rs/)
- [Data formats supported by Serde](https://serde.rs/#data-formats)
- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
- [Examples](https://serde.rs/examples.html)
- [API documentation](https://docs.rs/serde)
- [Release notes](https://github.com/serde-rs/serde/releases)
## Serde in action
<details>
<summary>
Click to show Cargo.toml.
<a href="https://play.rust-lang.org/?edition=2021&gist=72755f28f99afc95e01d63174b28c1f5" target="_blank">Run this code in the playground.</a>
</summary>
```toml
[dependencies]
# The core APIs, including the Serialize and Deserialize traits. Always
# required when using Serde. The "derive" feature is only required when
# using #[derive(Serialize, Deserialize)] to make Serde work with structs
# and enums defined in your crate.
serde = { version = "1.0", features = ["derive"] }
# Each data format lives in its own crate; the sample code below uses JSON
# but you may be using a different one.
serde_json = "1.0"
```
</details>
<p></p>
```rust
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let point = Point { x: 1, y: 2 };
// Convert the Point to a JSON string.
let serialized = serde_json::to_string(&point).unwrap();
// Prints serialized = {"x":1,"y":2}
println!("serialized = {}", serialized);
// Convert the JSON string back to a Point.
let deserialized: Point = serde_json::from_str(&serialized).unwrap();
// Prints deserialized = Point { x: 1, y: 2 }
println!("deserialized = {:?}", deserialized);
}
```
## Getting help
Serde is one of the most widely used Rust libraries so any place that Rustaceans
congregate will be able to help you out. For chat, consider trying the
[#rust-questions] or [#rust-beginners] channels of the unofficial community
Discord (invite: <https://discord.gg/rust-lang-community>), the [#rust-usage] or
[#beginners] channels of the official Rust Project Discord (invite:
<https://discord.gg/rust-lang>), or the [#general][zulip] stream in Zulip. For
asynchronous, consider the [\[rust\] tag on StackOverflow][stackoverflow], the
[/r/rust] subreddit which has a pinned weekly easy questions post, or the Rust
[Discourse forum][discourse]. It's acceptable to file a support issue in this
repo but they tend not to get as many eyes as any of the above and may get
closed without a response after some time.
[#rust-questions]: https://discord.com/channels/273534239310479360/274215136414400513
[#rust-beginners]: https://discord.com/channels/273534239310479360/273541522815713281
[#rust-usage]: https://discord.com/channels/442252698964721669/443150878111694848
[#beginners]: https://discord.com/channels/442252698964721669/448238009733742612
[zulip]: https://rust-lang.zulipchat.com/#narrow/stream/122651-general
[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
[/r/rust]: https://www.reddit.com/r/rust
[discourse]: https://users.rust-lang.org
<br>
#### License
<sup>
Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
</sup>
<br>
<sub>
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
</sub>
serde_core/build.rs
+91
View File
@@ -0,0 +1,91 @@
use std::env;
use std::process::Command;
use std::str;
// The rustc-cfg strings below are *not* public API. Please let us know by
// opening a GitHub issue if your build environment requires some way to enable
// these cfgs other than by executing our build script.
fn main() {
println!("cargo:rerun-if-changed=build.rs");
let minor = match rustc_minor_version() {
Some(minor) => minor,
None => return,
};
if minor >= 77 {
println!("cargo:rustc-check-cfg=cfg(no_core_cstr)");
println!("cargo:rustc-check-cfg=cfg(no_core_error)");
println!("cargo:rustc-check-cfg=cfg(no_core_net)");
println!("cargo:rustc-check-cfg=cfg(no_core_num_saturating)");
println!("cargo:rustc-check-cfg=cfg(no_diagnostic_namespace)");
println!("cargo:rustc-check-cfg=cfg(no_std_atomic)");
println!("cargo:rustc-check-cfg=cfg(no_std_atomic64)");
println!("cargo:rustc-check-cfg=cfg(no_target_has_atomic)");
}
let target = env::var("TARGET").unwrap();
let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten";
// Support for #[cfg(target_has_atomic = "...")] stabilized in Rust 1.60.
if minor < 60 {
println!("cargo:rustc-cfg=no_target_has_atomic");
// Allowlist of archs that support std::sync::atomic module. This is
// based on rustc's compiler/rustc_target/src/spec/*.rs.
let has_atomic64 = target.starts_with("x86_64")
|| target.starts_with("i686")
|| target.starts_with("aarch64")
|| target.starts_with("powerpc64")
|| target.starts_with("sparc64")
|| target.starts_with("mips64el")
|| target.starts_with("riscv64");
let has_atomic32 = has_atomic64 || emscripten;
if minor < 34 || !has_atomic64 {
println!("cargo:rustc-cfg=no_std_atomic64");
}
if minor < 34 || !has_atomic32 {
println!("cargo:rustc-cfg=no_std_atomic");
}
}
// Support for core::ffi::CStr and alloc::ffi::CString stabilized in Rust 1.64.
// https://blog.rust-lang.org/2022/09/22/Rust-1.64.0.html#c-compatible-ffi-types-in-core-and-alloc
if minor < 64 {
println!("cargo:rustc-cfg=no_core_cstr");
}
// Support for core::num::Saturating and std::num::Saturating stabilized in Rust 1.74
// https://blog.rust-lang.org/2023/11/16/Rust-1.74.0.html#stabilized-apis
if minor < 74 {
println!("cargo:rustc-cfg=no_core_num_saturating");
}
// Support for core::net stabilized in Rust 1.77.
// https://blog.rust-lang.org/2024/03/21/Rust-1.77.0.html
if minor < 77 {
println!("cargo:rustc-cfg=no_core_net");
}
// Support for the `#[diagnostic]` tool attribute namespace
// https://blog.rust-lang.org/2024/05/02/Rust-1.78.0.html#diagnostic-attributes
if minor < 78 {
println!("cargo:rustc-cfg=no_diagnostic_namespace");
}
// The Error trait became available in core in 1.81.
// https://blog.rust-lang.org/2024/09/05/Rust-1.81.0.html#coreerrorerror
if minor < 81 {
println!("cargo:rustc-cfg=no_core_error");
}
}
fn rustc_minor_version() -> Option<u32> {
let rustc = env::var_os("RUSTC")?;
let output = Command::new(rustc).arg("--version").output().ok()?;
let version = str::from_utf8(&output.stdout).ok()?;
let mut pieces = version.split('.');
if pieces.next() != Some("rustc 1") {
return None;
}
pieces.next()?.parse().ok()
}
serde_core/crates-io.md
+42
View File
@@ -0,0 +1,42 @@
<!-- Serde readme rendered on crates.io -->
**Serde Core is a collection of core functionalities and abstractions for Serde, a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
---
Serde Core exposes core traits and utilities for interacting with Serde's data model.
It is intended to be consumed by Serde's data formats and other crates that implement the Serde traits by hand.
If you are looking to use Serde in your library/application to simply serialize and deserialize data, you most likely want to use [Serde](https://crates.io/crates/serde) directly.
Serde Core does _not_ offer any convenience functions for automatically implementing `Serialize` or `Deserialize` via a `#[derive]` macro.
You may be looking for:
- [API documentation](https://docs.rs/serde_core)
- [An overview of Serde](https://serde.rs/)
- [Data formats supported by Serde](https://serde.rs/#data-formats)
- [Examples](https://serde.rs/examples.html)
- [Release notes](https://github.com/serde-rs/serde_core/releases)
## Getting help
Serde is one of the most widely used Rust libraries so any place that Rustaceans
congregate will be able to help you out. For chat, consider trying the
[#rust-questions] or [#rust-beginners] channels of the unofficial community
Discord (invite: <https://discord.gg/rust-lang-community>), the [#rust-usage]
or [#beginners] channels of the official Rust Project Discord (invite:
<https://discord.gg/rust-lang>), or the [#general][zulip] stream in Zulip. For
asynchronous, consider the [\[rust\] tag on StackOverflow][stackoverflow], the
[/r/rust] subreddit which has a pinned weekly easy questions post, or the Rust
[Discourse forum][discourse]. It's acceptable to file a support issue in this
repo but they tend not to get as many eyes as any of the above and may get
closed without a response after some time.
[#rust-questions]: https://discord.com/channels/273534239310479360/274215136414400513
[#rust-beginners]: https://discord.com/channels/273534239310479360/273541522815713281
[#rust-usage]: https://discord.com/channels/442252698964721669/443150878111694848
[#beginners]: https://discord.com/channels/442252698964721669/448238009733742612
[zulip]: https://rust-lang.zulipchat.com/#narrow/stream/122651-general
[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
[/r/rust]: https://www.reddit.com/r/rust
[discourse]: https://users.rust-lang.org
serde/src/de/ignored_any.rs → serde_core/src/de/ignored_any.rs
View File
serde/src/de/impls.rs → serde_core/src/de/impls.rs
+6 -4
View File
@@ -2174,7 +2174,7 @@ impl<'de> Deserialize<'de> for Duration {
b"secs" => Ok(Field::Secs),
b"nanos" => Ok(Field::Nanos),
_ => {
let value = crate::__private::from_utf8_lossy(value);
let value = crate::lib::from_utf8_lossy(value);
Err(Error::unknown_field(&*value, FIELDS))
}
}
@@ -2510,7 +2510,7 @@ mod range {
b"start" => Ok(Field::Start),
b"end" => Ok(Field::End),
_ => {
let value = crate::__private::from_utf8_lossy(value);
let value = crate::lib::from_utf8_lossy(value);
Err(Error::unknown_field(&*value, FIELDS))
}
}
@@ -2665,7 +2665,7 @@ mod range_from {
match value {
b"start" => Ok(Field::Start),
_ => {
let value = crate::__private::from_utf8_lossy(value);
let value = crate::lib::from_utf8_lossy(value);
Err(Error::unknown_field(&*value, FIELDS))
}
}
@@ -2803,7 +2803,7 @@ mod range_to {
match value {
b"end" => Ok(Field::End),
_ => {
let value = crate::__private::from_utf8_lossy(value);
let value = crate::lib::from_utf8_lossy(value);
Err(Error::unknown_field(&*value, FIELDS))
}
}
@@ -2975,6 +2975,8 @@ where
////////////////////////////////////////////////////////////////////////////////
#[cfg(feature = "result")]
#[cfg_attr(docsrs, doc(cfg(feature = "result")))]
impl<'de, T, E> Deserialize<'de> for Result<T, E>
where
T: Deserialize<'de>,
serde/src/de/mod.rs → serde_core/src/de/mod.rs
+2 -12
View File
@@ -120,10 +120,10 @@ pub mod value;
mod ignored_any;
mod impls;
pub(crate) mod size_hint;
pub mod size_hint;
pub use self::ignored_any::IgnoredAny;
pub use crate::seed::InPlaceSeed;
#[cfg(all(not(feature = "std"), no_core_error))]
#[doc(no_inline)]
pub use crate::std_error::Error as StdError;
@@ -1222,16 +1222,6 @@ pub trait Deserializer<'de>: Sized {
fn is_human_readable(&self) -> bool {
true
}
// Not public API.
#[cfg(all(not(no_serde_derive), any(feature = "std", feature = "alloc")))]
#[doc(hidden)]
fn __deserialize_content<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de, Value = crate::__private::de::Content<'de>>,
{
self.deserialize_any(visitor)
}
}
////////////////////////////////////////////////////////////////////////////////
serde/src/de/seed.rs → serde_core/src/de/seed.rs
View File
serde/src/de/size_hint.rs → serde_core/src/de/size_hint.rs
+3
View File
@@ -1,6 +1,8 @@
//! Provides helpers for creating size hints for container deserialization.
#[cfg(any(feature = "std", feature = "alloc"))]
use crate::lib::*;
/// Extracts the exact size of an iterator if it has a known upper bound and it matches the lower bound.
pub fn from_bounds<I>(iter: &I) -> Option<usize>
where
I: Iterator,
@@ -8,6 +10,7 @@ where
helper(iter.size_hint())
}
/// Returns conservative size estimate for a container, clamping the result to a maximum size.
#[cfg(any(feature = "std", feature = "alloc"))]
pub fn cautious<Element>(hint: Option<usize>) -> usize {
const MAX_PREALLOC_BYTES: usize = 1024 * 1024;
serde/src/de/value.rs → serde_core/src/de/value.rs
View File
serde/src/format.rs → serde_core/src/format.rs
View File
serde/src/integer128.rs → serde_core/src/integer128.rs
View File
serde_core/src/lib.rs
+267
View File
@@ -0,0 +1,267 @@
//! # Serde Core
//!
//! Serde is a framework for ***ser***ializing and ***de***serializing Rust data
//! structures efficiently and generically.
//!
//! `serde_core` provides essential traits and functions that form the backbone of Serde. It is intended for use by data format implementations;
//! while it is possible to depend on `serde` crate in a crate that implements a data format,
//! doing so means that the build of data format crate cannot start until serde_derive is done building (if that feature is enabled).
//! Thus, implementing a data format in terms of serde_core and not of serde should improve compile times of users of your data format.
//!
//! Alternatively, as an user of data formats you could use `serde_core` instead of `serde` if you do not intend to enable derive feature on `serde`.
//!
//! If you're still unsure which crate to use, favor `serde` for the most straightforward experience.
//! For more detailed information and usage examples, refer to Serde's documentation at <https://serde.rs/>.
//!
////////////////////////////////////////////////////////////////////////////////
// Serde types in rustdoc of other crates get linked to here.
#![doc(html_root_url = "https://docs.rs/serde_core/1.0.219")]
// Support using Serde without the standard library!
#![cfg_attr(not(feature = "std"), no_std)]
// Show which crate feature enables conditionally compiled APIs in documentation.
#![cfg_attr(docsrs, feature(doc_cfg, rustdoc_internals))]
#![cfg_attr(docsrs, allow(internal_features))]
// Unstable functionality only if the user asks for it. For tracking and
// discussion of these features please refer to this issue:
//
// https://github.com/serde-rs/serde/issues/812
#![cfg_attr(feature = "unstable", feature(never_type))]
#![allow(unknown_lints, bare_trait_objects, deprecated)]
// Ignored clippy and clippy_pedantic lints
#![allow(
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
clippy::unnested_or_patterns,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/7768
clippy::semicolon_if_nothing_returned,
// not available in our oldest supported compiler
clippy::empty_enum,
clippy::type_repetition_in_bounds, // https://github.com/rust-lang/rust-clippy/issues/8772
// integer and float ser/de requires these sorts of casts
clippy::cast_possible_truncation,
clippy::cast_possible_wrap,
clippy::cast_precision_loss,
clippy::cast_sign_loss,
// things are often more readable this way
clippy::cast_lossless,
clippy::module_name_repetitions,
clippy::single_match_else,
clippy::type_complexity,
clippy::use_self,
clippy::zero_prefixed_literal,
// correctly used
clippy::derive_partial_eq_without_eq,
clippy::enum_glob_use,
clippy::explicit_auto_deref,
clippy::incompatible_msrv,
clippy::let_underscore_untyped,
clippy::map_err_ignore,
clippy::new_without_default,
clippy::result_unit_err,
clippy::wildcard_imports,
// not practical
clippy::needless_pass_by_value,
clippy::similar_names,
clippy::too_many_lines,
// preference
clippy::doc_markdown,
clippy::elidable_lifetime_names,
clippy::needless_lifetimes,
clippy::unseparated_literal_suffix,
// false positive
clippy::needless_doctest_main,
// noisy
clippy::missing_errors_doc,
clippy::must_use_candidate,
)]
// Restrictions
#![deny(clippy::question_mark_used)]
// Rustc lints.
#![deny(missing_docs, unused_imports)]
////////////////////////////////////////////////////////////////////////////////
#[cfg(feature = "alloc")]
extern crate alloc;
/// A facade around all the types we need from the `std`, `core`, and `alloc`
/// crates. This avoids elaborate import wrangling having to happen in every
/// module.
mod lib {
mod core {
#[cfg(not(feature = "std"))]
pub use core::*;
#[cfg(feature = "std")]
pub use std::*;
}
pub use self::core::{f32, f64};
pub use self::core::{iter, num, str};
#[cfg(any(feature = "std", feature = "alloc"))]
pub use self::core::{cmp, mem};
pub use self::core::cell::{Cell, RefCell};
pub use self::core::cmp::Reverse;
pub use self::core::fmt::{self, Debug, Display, Write as FmtWrite};
pub use self::core::marker::PhantomData;
pub use self::core::num::Wrapping;
pub use self::core::ops::{Bound, Range, RangeFrom, RangeInclusive, RangeTo};
pub use self::core::result;
pub use self::core::time::Duration;
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::borrow::{Cow, ToOwned};
#[cfg(feature = "std")]
pub use std::borrow::{Cow, ToOwned};
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::string::{String, ToString};
#[cfg(feature = "std")]
pub use std::string::{String, ToString};
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::vec::Vec;
#[cfg(feature = "std")]
pub use std::vec::Vec;
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::boxed::Box;
#[cfg(feature = "std")]
pub use std::boxed::Box;
#[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
pub use alloc::rc::{Rc, Weak as RcWeak};
#[cfg(all(feature = "rc", feature = "std"))]
pub use std::rc::{Rc, Weak as RcWeak};
#[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
pub use alloc::sync::{Arc, Weak as ArcWeak};
#[cfg(all(feature = "rc", feature = "std"))]
pub use std::sync::{Arc, Weak as ArcWeak};
#[cfg(all(feature = "alloc", not(feature = "std")))]
pub use alloc::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
#[cfg(feature = "std")]
pub use std::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
#[cfg(all(not(no_core_cstr), not(feature = "std")))]
pub use self::core::ffi::CStr;
#[cfg(feature = "std")]
pub use std::ffi::CStr;
#[cfg(all(not(no_core_cstr), feature = "alloc", not(feature = "std")))]
pub use alloc::ffi::CString;
#[cfg(feature = "std")]
pub use std::ffi::CString;
#[cfg(all(not(no_core_net), not(feature = "std")))]
pub use self::core::net;
#[cfg(feature = "std")]
pub use std::net;
#[cfg(feature = "std")]
pub use std::error;
#[cfg(feature = "std")]
pub use std::collections::{HashMap, HashSet};
#[cfg(feature = "std")]
pub use std::ffi::{OsStr, OsString};
#[cfg(feature = "std")]
pub use std::hash::{BuildHasher, Hash};
#[cfg(feature = "std")]
pub use std::io::Write;
#[cfg(feature = "std")]
pub use std::path::{Path, PathBuf};
#[cfg(feature = "std")]
pub use std::sync::{Mutex, RwLock};
#[cfg(feature = "std")]
pub use std::time::{SystemTime, UNIX_EPOCH};
#[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic)))]
pub use std::sync::atomic::{
AtomicBool, AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicU16, AtomicU32, AtomicU8,
AtomicUsize, Ordering,
};
#[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic64)))]
pub use std::sync::atomic::{AtomicI64, AtomicU64};
#[cfg(all(feature = "std", not(no_target_has_atomic)))]
pub use std::sync::atomic::Ordering;
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "8"))]
pub use std::sync::atomic::{AtomicBool, AtomicI8, AtomicU8};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "16"))]
pub use std::sync::atomic::{AtomicI16, AtomicU16};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "32"))]
pub use std::sync::atomic::{AtomicI32, AtomicU32};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "64"))]
pub use std::sync::atomic::{AtomicI64, AtomicU64};
#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "ptr"))]
pub use std::sync::atomic::{AtomicIsize, AtomicUsize};
#[cfg(not(no_core_num_saturating))]
pub use self::core::num::Saturating;
#[cfg(any(feature = "std", feature = "alloc"))]
#[doc(hidden)]
pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<'_, str> {
String::from_utf8_lossy(bytes)
}
// The generated code calls this like:
//
// let value = &_serde::__private::from_utf8_lossy(bytes);
// Err(_serde::de::Error::unknown_variant(value, VARIANTS))
//
// so it is okay for the return type to be different from the std case as long
// as the above works.
#[cfg(not(any(feature = "std", feature = "alloc")))]
#[doc(hidden)]
pub fn from_utf8_lossy(bytes: &[u8]) -> &str {
// Three unicode replacement characters if it fails. They look like a
// white-on-black question mark. The user will recognize it as invalid
// UTF-8.
str::from_utf8(bytes).unwrap_or("\u{fffd}\u{fffd}\u{fffd}")
}
}
// None of this crate's error handling needs the `From::from` error conversion
// performed implicitly by the `?` operator or the standard library's `try!`
// macro. This simplified macro gives a 5.5% improvement in compile time
// compared to standard `try!`, and 9% improvement compared to `?`.
macro_rules! tri {
($expr:expr) => {
match $expr {
Ok(val) => val,
Err(err) => return Err(err),
}
};
}
////////////////////////////////////////////////////////////////////////////////
#[macro_use]
mod macros;
#[doc(hidden)]
pub use crate::lib::result::Result;
#[macro_use]
mod integer128;
pub mod de;
pub mod ser;
mod format;
#[doc(inline)]
pub use crate::de::{Deserialize, Deserializer};
#[doc(inline)]
pub use crate::ser::{Serialize, Serializer};
#[doc(hidden)]
pub use lib::from_utf8_lossy;
#[path = "de/seed.rs"]
mod seed;
#[cfg(all(not(feature = "std"), no_core_error))]
mod std_error;
serde/src/macros.rs → serde_core/src/macros.rs
+1 -2
View File
@@ -1,7 +1,6 @@
// Super explicit first paragraph because this shows up at the top level and
// trips up people who are just looking for basic Serialize / Deserialize
// documentation.
//
/// Helper macro when implementing the `Deserializer` part of a new data format
/// for Serde.
///
@@ -123,7 +122,7 @@ macro_rules! forward_to_deserialize_any {
macro_rules! forward_to_deserialize_any_method {
($func:ident<$l:tt, $v:ident>($($arg:ident : $ty:ty),*)) => {
#[inline]
fn $func<$v>(self, $($arg: $ty,)* visitor: $v) -> $crate::__private::Result<$v::Value, <Self as $crate::de::Deserializer<$l>>::Error>
fn $func<$v>(self, $($arg: $ty,)* visitor: $v) -> $crate::Result<$v::Value, <Self as $crate::de::Deserializer<$l>>::Error>
where
$v: $crate::de::Visitor<$l>,
{
serde/src/ser/fmt.rs → serde_core/src/ser/fmt.rs
View File
serde/src/ser/impls.rs → serde_core/src/ser/impls.rs
+2
View File
@@ -660,6 +660,8 @@ where
////////////////////////////////////////////////////////////////////////////////
#[cfg(feature = "result")]
#[cfg_attr(docsrs, doc(cfg(feature = "result")))]
impl<T, E> Serialize for Result<T, E>
where
T: Serialize,
serde/src/ser/impossible.rs → serde_core/src/ser/impossible.rs
View File
serde/src/ser/mod.rs → serde_core/src/ser/mod.rs
View File
serde/src/std_error.rs → serde_core/src/std_error.rs
View File