Modernize lazy-static infra (#219)

.github/workflows/rust.yml

@@ -0,0 +1,60 @@
+name: Rust
+
+on: [push, pull_request]
+
+env:
+  CARGO_TERM_COLOR: always
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    name: "Tests"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        channel:
+        - stable
+        - beta
+        - nightly
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
+
+    - name: Install Rust Toolchain
+      run: rustup default ${{ matrix.channel }}
+
+    - name: Install cargo-hack
+      run: cargo install cargo-hack
+
+    - name: Powerset
+      run: cargo hack test --feature-powerset --lib
+
+  miri:
+    name: "Miri"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Miri
+        run: |
+          rustup toolchain install nightly --component miri
+          cargo +nightly miri setup
+      - name: Default features
+        run: cargo +nightly miri test
+
+  embedded:
+    name: Build (embedded)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
+
+      - name: Install Rust toolchain
+        run: |
+          rustup default nightly
+          rustup target add thumbv7em-none-eabi
+
+      - name: Default features
+        run: cargo build -Z avoid-dev-deps --features spin_no_std --target thumbv7em-none-eabi

.gitignore

@@ -2,3 +2,4 @@ target
 doc
 Cargo.lock
 .cargo
+wip

Cargo.toml

@@ -12,10 +12,10 @@ documentation = "https://docs.rs/lazy_static"
 repository = "https://github.com/rust-lang-nursery/lazy-static.rs"
 keywords = ["macro", "lazy", "static"]
 categories = [ "no-std", "rust-patterns", "memory-management" ]
-exclude = ["/.travis.yml", "/appveyor.yml"]
+exclude = [".github"]
 
 [dependencies.spin]
-version = "0.9.3"
+version = "0.9.8"
 default-features = false
 features = ["once"]
 optional = true
@@ -25,12 +25,4 @@ spin_no_std = ["spin"]
 
 [dev-dependencies]
 doc-comment = "0.3.1"
-
-[badges]
-appveyor = { repository = "rust-lang-nursery/lazy-static.rs" }
-travis-ci = { repository = "rust-lang-nursery/lazy-static.rs" }
-
-is-it-maintained-issue-resolution = { repository = "rust-lang-nursery/lazy-static.rs" }
-is-it-maintained-open-issues = { repository = "rust-lang-nursery/lazy-static.rs" }
-
-maintenance = { status = "passively-maintained" }
+trybuild = "1"

src/inline_lazy.rs

@@ -15,6 +15,7 @@ use self::std::sync::Once;
 #[allow(deprecated)]
 pub use self::std::sync::ONCE_INIT;
 
+#[allow(dead_code)] // Used in macros
 pub struct Lazy<T: Sync>(Cell<MaybeUninit<T>>, Once);
 
 impl<T: Sync> Lazy<T> {

tests/compile_fail/incorrect_visibility_restriction.rs

@@ -0,0 +1,8 @@
+#[macro_use]
+extern crate lazy_static;
+
+lazy_static! {
+    pub(nonsense) static ref WRONG: () = ();
+}
+
+fn main() { }

tests/compile_fail/incorrect_visibility_restriction.stderr

@@ -0,0 +1,10 @@
+error[E0704]: incorrect visibility restriction
+ --> tests/compile_fail/incorrect_visibility_restriction.rs:5:9
+  |
+5 |     pub(nonsense) static ref WRONG: () = ();
+  |         ^^^^^^^^ help: make this visible only to module `nonsense` with `in`: `in nonsense`
+  |
+  = help: some possible visibility restrictions are:
+          `pub(crate)`: visible only on the current crate
+          `pub(super)`: visible only in the current module's parent
+          `pub(in path::to::module)`: visible only on the specified path

compiletest/tests/compile-fail/static_is_private.rs → tests/compile_fail/static_is_private.rs

@@ -1,5 +1,5 @@
 #[macro_use]
-extern crate lazy_static_compiletest as lazy_static;
+extern crate lazy_static;
 
 mod outer {
     pub mod inner {
@@ -10,5 +10,5 @@ mod outer {
 }
 
 fn main() {
-    assert_eq!(*outer::inner::FOO, ()); //~ ERROR static `FOO` is private
+    assert_eq!(*outer::inner::FOO, ());
 }

tests/compile_fail/static_is_private.stderr

@@ -0,0 +1,14 @@
+error[E0603]: static `FOO` is private
+  --> tests/compile_fail/static_is_private.rs:13:31
+   |
+13 |     assert_eq!(*outer::inner::FOO, ());
+   |                               ^^^ private static
+   |
+note: the static `FOO` is defined here
+  --> tests/compile_fail/static_is_private.rs:6:9
+   |
+6  | /         lazy_static! {
+7  | |             pub(in outer) static ref FOO: () = ();
+8  | |         }
+   | |_________^
+   = note: this error originates in the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)

tests/compile_fail/static_is_sized.rs

@@ -0,0 +1,9 @@
+#[macro_use]
+extern crate lazy_static;
+
+lazy_static! {
+    pub static ref FOO: str = panic!();
+}
+
+
+fn main() { }