THRIFT-5819: use latest rustc version for rustlib (#3085)

Client: rust

This upgrades the version of rust in the rust-toolchain file, docs and dockerfiles. Doing so requires a few changes to the source, mainly to fix or silence new warnings.

Submitted on behalf of a third-party: Jiayu Liu
Derived from the following PR: #3045

Co-authored-by: Jiayu Liu <jiayu@hey.com>

Author: cameron-martin

.github/workflows/build.yml

@@ -400,7 +400,7 @@ jobs:
     needs: compiler
     runs-on: ubuntu-24.04
     env:
-      TOOLCHAIN_VERSION: 1.65.0
+      TOOLCHAIN_VERSION: 1.83.0
     steps:
       - uses: actions/checkout@v4
 

LANGUAGES.md

@@ -319,7 +319,7 @@ Thrift's core protocol is TBinary, supported by all languages except for JavaScr
 <td align=left><a href="https://github.com/apache/thrift/blob/master/lib/rs/README.md">Rust</a></td>
 <!-- Since -----------------><td>0.11.0</td>
 <!-- Build Systems ---------><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td>
-<!-- Language Levels -------><td>1.65.0</td><td>1.xx.x</td>
+<!-- Language Levels -------><td>1.83.0</td><td>1.xx.x</td>
 <!-- Field types -----------><td><img src="/doc/images/cred.png" alt=""/></td>
 <!-- Low-Level Transports --><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td>
 <!-- Transport Wrappers ----><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cred.png" alt=""/></td>

build/docker/README.md

@@ -196,6 +196,6 @@ Last updated: March 5, 2024
 | python2   | 2.7.18        |               |       |
 | python3   | 3.8.10        | 3.10.12       |       |
 | ruby      | 2.7.0p0       | 3.0.2p107     |       |
-| rust      | 1.65.0        | 1.65.0        |       |
+| rust      | 1.83.0        | 1.83.0        |       |
 | smalltalk |               |               | Not in CI |
 | swift     | 5.7           | 5.7           |       |

build/docker/ubuntu-focal/Dockerfile

@@ -273,7 +273,7 @@ RUN apt-get install -y --no-install-recommends \
 
 USER ${user}
 RUN `# Rust dependencies` \
-    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.65.0 -y
+    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.83.0 -y
 ENV PATH /home/${user}/.cargo/bin:$PATH
 USER root
 

build/docker/ubuntu-jammy/Dockerfile

@@ -272,7 +272,7 @@ RUN apt-get install -y --no-install-recommends \
 
 USER ${user}
 RUN `# Rust dependencies` \
-    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.65.0 -y
+    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.83.0 -y
 ENV PATH /home/${user}/.cargo/bin:$PATH
 USER root
 

compiler/cpp/src/thrift/generate/t_rs_generator.cc

@@ -749,8 +749,8 @@ void t_rs_generator::render_const_value(t_type* ttype,
   } else if (ttype->is_enum()) {
     f_gen_ << "{" << '\n';
     indent_up();
-    f_gen_ << indent() << to_rust_type(ttype) << "::try_from(" << tvalue->get_integer()
-           << ").expect(\"expecting valid const value\")" << '\n';
+    f_gen_ << indent() << to_rust_type(ttype) << "::from(" << tvalue->get_integer()
+           << ")" << '\n';
     indent_down();
     f_gen_ << indent() << "}";
   } else if (ttype->is_struct() || ttype->is_xception()) {

lib/rs/src/lib.rs

@@ -53,7 +53,7 @@
 //! [tutorial]: https://github.com/apache/thrift/tree/master/tutorial/rs
 
 #![crate_type = "lib"]
-#![doc(test(attr(allow(unused_variables), deny(warnings))))]
+#![doc(test(attr(allow(unused_variables, dead_code), deny(warnings))))]
 #![deny(bare_trait_objects)]
 
 // NOTE: this macro has to be defined before any modules. See:

lib/rs/src/protocol/compact.rs

@@ -681,8 +681,6 @@ fn u8_to_type(b: u8) -> crate::Result<TType> {
 #[cfg(test)]
 mod tests {
 
-    use std::i32;
-
     use crate::protocol::{
         TFieldIdentifier, TInputProtocol, TListIdentifier, TMapIdentifier, TMessageIdentifier,
         TMessageType, TOutputProtocol, TSetIdentifier, TStructIdentifier, TType,
@@ -2818,7 +2816,7 @@ mod tests {
         copy_write_buffer_to_read_buffer!(o_prot);
 
         let read_double = i_prot.read_double().unwrap();
-        assert!(read_double - double < std::f64::EPSILON);
+        assert!((read_double - double).abs() < f64::EPSILON);
     }
 
     #[test]

lib/rs/src/protocol/stored.rs

@@ -83,6 +83,8 @@ pub struct TStoredInputProtocol<'a> {
     message_ident: Option<TMessageIdentifier>,
 }
 
+// Erroneous suggestion by clippy
+#[allow(clippy::needless_lifetimes)]
 impl<'a> TStoredInputProtocol<'a> {
     /// Create a `TStoredInputProtocol` that delegates all calls other than
     /// `TInputProtocol::read_message_begin(...)` to a `wrapped`
@@ -100,6 +102,8 @@ impl<'a> TStoredInputProtocol<'a> {
     }
 }
 
+// Erroneous suggestion by clippy
+#[allow(clippy::needless_lifetimes)]
 impl<'a> TInputProtocol for TStoredInputProtocol<'a> {
     fn read_message_begin(&mut self) -> crate::Result<TMessageIdentifier> {
         self.message_ident.take().ok_or_else(|| {

lib/rs/src/transport/framed.rs

@@ -97,7 +97,7 @@ where
             self.buf.resize(buf_capacity, 0);
 
             self.chan.read_exact(&mut self.buf[..message_size])?;
-            self.cap = message_size as usize;
+            self.cap = message_size;
             self.pos = 0;
         }