Bump MSRV to 1.54.0

- This makes it so `doc` compiles on stable

Fixes #2618

Author: epage

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: [1.46.0, stable, beta]
+        rust: [1.54.0, stable, beta]
         os: [windows-latest, macos-latest, ubuntu-latest]
         target:
           - i686-pc-windows-msvc
@@ -169,7 +169,7 @@ jobs:
       - name: Install rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.46.0
+          toolchain: 1.54.0
           target: ${{ matrix.target }}
           override: true
       - name: Checkout

CHANGELOG.md

@@ -8,7 +8,7 @@ TODO: `cargo`, `std` features
 ## v3.0.0-rc.0
 
 #### Minimum Required Rust
-* As of this release, `clap` requires `rustc 1.46.0` or greater.
+* As of this release, `clap` requires `rustc 1.54.0` or greater.
 
 #### BREAKING CHANGES
 

README.md

@@ -555,7 +555,7 @@ The following is a list of the minimum required version of Rust to compile `clap
 
 |  clap  |  MSRV  |
 | :----: | :----: |
-| >=3.0  | 1.46.0 |
+| >=3.0  | 1.54.0 |
 | >=2.21 | 1.24.0 |
 | >=2.2  | 1.12.0 |
 | >=2.1  | 1.6.0  |

clap_derive/Cargo.toml

@@ -31,9 +31,9 @@ proc-macro = true
 bench = false
 
 [dependencies]
-syn = { version = "1.0.69", features = ["full"] }
+syn = { version = "1.0.74", features = ["full"] }
 quote = "1.0.9"
-proc-macro2 = "1.0.26"
+proc-macro2 = "1.0.28"
 heck = "0.3.0"
 proc-macro-error = "1"
 

clap_derive/tests/ui.rs

@@ -5,7 +5,7 @@
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 
-#[rustversion::attr(any(not(stable), before(1.45), since(1.46)), ignore)]
+#[rustversion::attr(any(not(stable), before(1.54), since(1.55)), ignore)]
 #[test]
 fn ui() {
     let t = trybuild::TestCases::new();

clap_derive/tests/ui/arg_enum_on_struct.stderr

@@ -4,4 +4,13 @@ error: `#[derive(ArgEnum)]` only supports enums
 3 | #[derive(ArgEnum, Debug)]
   |          ^^^^^^^
   |
-  = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the derive macro `ArgEnum` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0046]: not all trait items implemented, missing: `as_arg`
+ --> $DIR/arg_enum_on_struct.rs:3:10
+  |
+3 | #[derive(ArgEnum, Debug)]
+  |          ^^^^^^^ missing `as_arg` in implementation
+  |
+  = note: this error originates in the derive macro `ArgEnum` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = help: implement the missing item: `fn as_arg(&self) -> Option<&'static str> { todo!() }`

clap_derive/tests/ui/enum_flatten.stderr

@@ -4,3 +4,12 @@ error: `flatten` is usable only with single-typed tuple variants
 14 | /     #[clap(flatten)]
 15 | |     Variant1,
    | |____________^
+
+error[E0046]: not all trait items implemented, missing: `has_subcommand`
+  --> $DIR/enum_flatten.rs:11:10
+   |
+11 | #[derive(Clap, Debug)]
+   |          ^^^^ missing `has_subcommand` in implementation
+   |
+   = note: this error originates in the derive macro `Clap` (in Nightly builds, run with -Z macro-backtrace for more info)
+   = help: implement the missing item: `fn has_subcommand(_: &str) -> bool { todo!() }`

clap_derive/tests/ui/enum_variant_not_args.stderr

@@ -5,3 +5,11 @@ error[E0277]: the trait bound `SubCmd: clap::Args` is not satisfied
   |         ^^^^^^ the trait `clap::Args` is not implemented for `SubCmd`
   |
   = note: required by `augment_args`
+
+error[E0277]: the trait bound `SubCmd: clap::Args` is not satisfied
+ --> $DIR/enum_variant_not_args.rs:3:9
+  |
+3 |     Sub(SubCmd),
+  |         ^^^^^^ the trait `clap::Args` is not implemented for `SubCmd`
+  |
+  = note: required by `augment_args_for_update`

clap_derive/tests/ui/external_subcommand_wrong_type.stderr

@@ -16,3 +16,30 @@ error: The enum variant marked with `external_attribute` must be a single-typed
 18 | /     #[clap(external_subcommand)]
 19 | |     Other { a: String },
    | |_______________________^
+
+error[E0046]: not all trait items implemented, missing: `has_subcommand`
+ --> $DIR/external_subcommand_wrong_type.rs:4:10
+  |
+4 | #[derive(Clap, Debug)]
+  |          ^^^^ missing `has_subcommand` in implementation
+  |
+  = note: this error originates in the derive macro `Clap` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = help: implement the missing item: `fn has_subcommand(_: &str) -> bool { todo!() }`
+
+error[E0046]: not all trait items implemented, missing: `has_subcommand`
+  --> $DIR/external_subcommand_wrong_type.rs:10:10
+   |
+10 | #[derive(Clap, Debug)]
+   |          ^^^^ missing `has_subcommand` in implementation
+   |
+   = note: this error originates in the derive macro `Clap` (in Nightly builds, run with -Z macro-backtrace for more info)
+   = help: implement the missing item: `fn has_subcommand(_: &str) -> bool { todo!() }`
+
+error[E0046]: not all trait items implemented, missing: `has_subcommand`
+  --> $DIR/external_subcommand_wrong_type.rs:16:10
+   |
+16 | #[derive(Clap, Debug)]
+   |          ^^^^ missing `has_subcommand` in implementation
+   |
+   = note: this error originates in the derive macro `Clap` (in Nightly builds, run with -Z macro-backtrace for more info)
+   = help: implement the missing item: `fn has_subcommand(_: &str) -> bool { todo!() }`

clap_derive/tests/ui/multiple_external_subcommand.stderr

@@ -3,3 +3,12 @@ error: Only one variant can be marked with `external_subcommand`, this is the se
    |
 14 |     #[clap(external_subcommand)]
    |            ^^^^^^^^^^^^^^^^^^^
+
+error[E0046]: not all trait items implemented, missing: `has_subcommand`
+ --> $DIR/multiple_external_subcommand.rs:9:10
+  |
+9 | #[derive(Clap, Debug)]
+  |          ^^^^ missing `has_subcommand` in implementation
+  |
+  = note: this error originates in the derive macro `Clap` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = help: implement the missing item: `fn has_subcommand(_: &str) -> bool { todo!() }`