Migrate to 2021 Rust edition

- bump up MSRV to 1.56.0
- remove explicit `#[doc(cfg(...))]` attribute usage where it's implied by `#[cfg(...)]` (rust-lang/rust#89596)

.github/workflows/ci.yml

@@ -61,7 +61,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        msrv: ['1.54.0']
+        msrv: ['1.56.0']
         crate:
           - cucumber-codegen
           - cucumber

Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "cucumber"
 version = "0.10.0"
-edition = "2018"
-resolver = "2"
+edition = "2021"
+rust-version = "1.56"
 description = """\
     Cucumber testing framework for Rust, with async support. \
     Fully native, no external test runners or dependencies.\

README.md

@@ -3,8 +3,8 @@ Cucumber testing framework for Rust
 
 [![Documentation](https://docs.rs/cucumber/badge.svg)](https://docs.rs/cucumber)
 [![Actions Status](https://github.com/cucumber-rs/cucumber/workflows/CI/badge.svg)](https://github.com/cucumber-rs/cucumber/actions)
-[![Rust 1.54+](https://img.shields.io/badge/rustc-1.54+-lightgray.svg "Rust 1.54+")](https://blog.rust-lang.org/2021/07/29/Rust-1.54.0.html)
-[![Unsafe Forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
+[![Rust 1.56+](https://img.shields.io/badge/rustc-1.56+-lightgray.svg "Rust 1.56+")](https://blog.rust-lang.org/2021/10/21/Rust-1.56.0.html)
+[![Unsafe Forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance)
 
 An implementation of the [Cucumber] testing framework for Rust. Fully native, no external test runners or dependencies.
 

book/tests/Cargo.toml

@@ -1,8 +1,7 @@
 [package]
 name = "cucumber-book-tests"
 version = "0.0.0"
-edition = "2018"
-resolver = "2"
+edition = "2021"
 authors = [
     "Brendan Molloy <brendan@bbqsrc.net>",
     "Ilya Solovyiov <ilya.solovyiov@gmail.com>",

codegen/Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "cucumber-codegen"
 version = "0.10.0" # should be the same as main crate version
-edition = "2018"
-resolver = "2"
+edition = "2021"
+rust-version = "1.56"
 description = "Code generation for `cucumber` crate."
 license = "MIT OR Apache-2.0"
 authors = [

codegen/src/lib.rs

@@ -93,11 +93,13 @@
     variant_size_differences
 )]
 
+use proc_macro::TokenStream;
+
 mod attribute;
 mod derive;
 
-use proc_macro::TokenStream;
-
+/// Helper macro for generating public shims for [`macro@given`], [`macro@when`]
+/// and [`macro@then`] attributes.
 macro_rules! step_attribute {
     ($name:ident) => {
         /// Attribute to auto-wire the test to the [`World`] implementer.
@@ -195,6 +197,9 @@ macro_rules! step_attribute {
     };
 }
 
+/// Helper macro for generating public shim of [`macro@WorldInit`] deriving
+/// macro consistently with the ones of [`macro@given`], [`macro@when`] and
+/// [`macro@then`] attributes.
 macro_rules! steps {
     ($($name:ident),*) => {
         /// Derive macro for tests auto-wiring.

src/codegen.rs

@@ -13,16 +13,14 @@
 use std::{fmt::Debug, path::Path};
 
 use async_trait::async_trait;
-
-use crate::{cucumber::DefaultCucumber, step, Cucumber, Step, World};
-
 pub use futures::future::LocalBoxFuture;
 pub use inventory::{self, collect, submit};
 pub use regex::Regex;
 
+use crate::{cucumber::DefaultCucumber, step, Cucumber, Step, World};
+
 /// [`World`] extension with auto-wiring capabilities.
 #[async_trait(?Send)]
-#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
 pub trait WorldInit<G, W, T>: WorldInventory<G, W, T>
 where
     Self: Debug,
@@ -124,7 +122,6 @@ where
 }
 
 /// [`World`] extension allowing to register steps in [`inventory`].
-#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
 pub trait WorldInventory<G, W, T>: World
 where
     G: StepConstructor<Self> + inventory::Collect,
@@ -186,7 +183,6 @@ where
 /// [`given`]: crate::given
 /// [`when`]: crate::when
 /// [`then`]: crate::then
-#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
 pub trait StepConstructor<W> {
     /// Creates a new [`Step`] with the corresponding [`Regex`].
     #[must_use]

src/event.rs

@@ -104,15 +104,15 @@ impl<World> Cucumber<World> {
         scenario: Arc<gherkin::Scenario>,
         event: Scenario<World>,
     ) -> Self {
-        #[allow(clippy::option_if_let_else)] // use of moved value: `event`
-        if let Some(r) = rule {
-            Self::Feature(
-                feat,
-                Feature::Rule(r, Rule::Scenario(scenario, event)),
-            )
-        } else {
-            Self::Feature(feat, Feature::Scenario(scenario, event))
-        }
+        Self::Feature(
+            feat,
+            #[allow(clippy::option_if_let_else)] // use of moved value: `event`
+            if let Some(r) = rule {
+                Feature::Rule(r, Rule::Scenario(scenario, event))
+            } else {
+                Feature::Scenario(scenario, event)
+            },
+        )
     }
 }
 

src/lib.rs

@@ -97,34 +97,18 @@
 )]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
-pub mod cli;
-mod cucumber;
-pub mod event;
-pub mod feature;
-pub mod parser;
-pub mod runner;
-pub mod step;
-pub mod writer;
-
-#[cfg(feature = "macros")]
-#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
-pub mod codegen;
-
 use std::error::Error as StdError;
 
 use async_trait::async_trait;
-
 pub use gherkin;
 
 #[cfg(feature = "macros")]
-#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
-#[doc(inline)]
-pub use self::codegen::WorldInit;
-#[cfg(feature = "macros")]
-#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
 #[doc(inline)]
 pub use cucumber_codegen::{given, then, when, WorldInit};
 
+#[cfg(feature = "macros")]
+#[doc(inline)]
+pub use self::codegen::WorldInit;
 #[doc(inline)]
 pub use self::{
     cucumber::Cucumber,
@@ -137,6 +121,18 @@ pub use self::{
     },
 };
 
+pub mod cli;
+mod cucumber;
+pub mod event;
+pub mod feature;
+pub mod parser;
+pub mod runner;
+pub mod step;
+pub mod writer;
+
+#[cfg(feature = "macros")]
+pub mod codegen;
+
 /// Represents a shared user-defined state for a [Cucumber] run.
 /// It lives on per-[scenario][0] basis.
 ///