make the command 'cargo test --no-default-features' work

src/lib.rs

@@ -34,6 +34,7 @@
 //! ## Safe Initialization of Global Data
 //!
 //! ```rust
+//! # #[cfg(any(feature = "std", feature = "critical-section"))] {
 //! use std::{env, io};
 //!
 //! use once_cell::sync::OnceCell;
@@ -60,13 +61,15 @@
 //!     INSTANCE.set(logger).unwrap();
 //!     // use `Logger::global()` from now on
 //! }
+//! # }
 //! ```
 //!
 //! ## Lazy Initialized Global Data
 //!
 //! This is essentially the `lazy_static!` macro, but without a macro.
 //!
 //! ```rust
+//! # #[cfg(any(feature = "std", feature = "critical-section"))] {
 //! use std::{sync::Mutex, collections::HashMap};
 //!
 //! use once_cell::sync::OnceCell;
@@ -80,12 +83,14 @@
 //!         Mutex::new(m)
 //!     })
 //! }
+//! # }
 //! ```
 //!
 //! There are also the [`sync::Lazy`] and [`unsync::Lazy`] convenience types to
 //! streamline this pattern:
 //!
 //! ```rust
+//! # #[cfg(any(feature = "std", feature = "critical-section"))] {
 //! use std::{sync::Mutex, collections::HashMap};
 //! use once_cell::sync::Lazy;
 //!
@@ -99,6 +104,7 @@
 //! fn main() {
 //!     println!("{:?}", GLOBAL_DATA.lock().unwrap());
 //! }
+//! # }
 //! ```
 //!
 //! Note that the variable that holds `Lazy` is declared as `static`, *not*
@@ -171,6 +177,7 @@
 //! runtime:
 //!
 //! ```
+//! # #[cfg(any(feature = "std", feature = "critical-section"))] {
 //! use std::path::Path;
 //!
 //! use once_cell::sync::OnceCell;
@@ -203,6 +210,7 @@
 //!     // ...
 //! # drop(rgb);
 //! }
+//! # }
 //! ```
 //!
 //! ## `lateinit`
@@ -212,6 +220,7 @@
 //!
 //!
 //! ```
+//! # #[cfg(any(feature = "std", feature = "critical-section"))] {
 //! use once_cell::sync::OnceCell;
 //!
 //! pub struct LateInit<T> { cell: OnceCell<T> }
@@ -252,6 +261,7 @@
 //!
 //!     let _a = &a.b.a.b.a;
 //! }
+//! # }
 //! ```
 //!
 //! # Comparison with std