Delete support for compilers without core::ops::Bound

.github/workflows/ci.yml

@@ -77,7 +77,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: [1.25.0, 1.26.0, 1.34.0]
+        rust: [1.26.0, 1.34.0]
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@v3

README.md

@@ -1,12 +1,12 @@
-# Serde   [![Build Status]][actions] [![Latest Version]][crates.io] [![serde: rustc 1.25+]][Rust 1.25] [![serde_derive: rustc 1.56+]][Rust 1.56]
+# Serde   [![Build Status]][actions] [![Latest Version]][crates.io] [![serde: rustc 1.26+]][Rust 1.26] [![serde_derive: rustc 1.56+]][Rust 1.56]
 
 [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: rustc 1.25+]: https://img.shields.io/badge/serde-rustc_1.25+-lightgray.svg
+[serde: rustc 1.26+]: https://img.shields.io/badge/serde-rustc_1.26+-lightgray.svg
 [serde_derive: rustc 1.56+]: https://img.shields.io/badge/serde_derive-rustc_1.56+-lightgray.svg
-[Rust 1.25]: https://blog.rust-lang.org/2018/03/29/Rust-1.25.html
+[Rust 1.26]: https://blog.rust-lang.org/2018/05/10/Rust-1.26.html
 [Rust 1.56]: https://blog.rust-lang.org/2021/10/21/Rust-1.56.0.html
 
 **Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**

serde/Cargo.toml

@@ -11,7 +11,7 @@ keywords = ["serde", "serialization", "no_std"]
 license = "MIT OR Apache-2.0"
 readme = "crates-io.md"
 repository = "https://github.com/serde-rs/serde"
-rust-version = "1.25"
+rust-version = "1.26"
 
 [dependencies]
 serde_derive = { version = "=1.0.179", optional = true, path = "../serde_derive" }

serde/build.rs

@@ -16,13 +16,6 @@ fn main() {
     let target = env::var("TARGET").unwrap();
     let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten";
 
-    // std::collections::Bound was stabilized in Rust 1.17
-    // but it was moved to core::ops later in Rust 1.26:
-    // https://doc.rust-lang.org/core/ops/enum.Bound.html
-    if minor < 26 {
-        println!("cargo:rustc-cfg=no_ops_bound");
-    }
-
     // 128-bit integers stabilized in Rust 1.26:
     // https://blog.rust-lang.org/2018/05/10/Rust-1.26.html
     //

serde/src/de/impls.rs

@@ -2666,7 +2666,6 @@ mod range_to {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-#[cfg(any(not(no_ops_bound), feature = "std"))]
 impl<'de, T> Deserialize<'de> for Bound<T>
 where
     T: Deserialize<'de>,

serde/src/lib.rs

@@ -183,7 +183,7 @@ mod lib {
     pub use self::core::fmt::{self, Debug, Display};
     pub use self::core::marker::{self, PhantomData};
     pub use self::core::num::Wrapping;
-    pub use self::core::ops::{Range, RangeFrom, RangeTo};
+    pub use self::core::ops::{Bound, Range, RangeFrom, RangeTo};
     pub use self::core::option::{self, Option};
     pub use self::core::result::{self, Result};
     pub use self::core::time::Duration;
@@ -251,12 +251,6 @@ mod lib {
     #[cfg(feature = "std")]
     pub use std::time::{SystemTime, UNIX_EPOCH};
 
-    #[cfg(all(feature = "std", no_ops_bound))]
-    pub use std::collections::Bound;
-
-    #[cfg(not(no_ops_bound))]
-    pub use self::core::ops::Bound;
-
     #[cfg(not(no_range_inclusive))]
     pub use self::core::ops::RangeInclusive;
 

serde/src/ser/impls.rs

@@ -310,7 +310,6 @@ where
 
 ////////////////////////////////////////////////////////////////////////////////
 
-#[cfg(any(not(no_ops_bound), feature = "std"))]
 impl<T> Serialize for Bound<T>
 where
     T: Serialize,