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fix(compiler) std and core are mutually exclusive features.

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This commit is contained in:
Ivan Enderlin
2020-05-19 09:44:18 +02:00
parent 40eea02af6
commit f9ae55d5d0
1 changed files with 10 additions and 2 deletions
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12
lib/compiler/src/lib.rs
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@@ -25,11 +25,19 @@
) )
)] )]
#[cfg(all(not(feature = "std"), feature = "core"))] #[cfg(all(feature = "std", feature = "core"))]
compile_error!(
"The `std` and `core` features are both enabled, which is an error. Please enable only once."
);
#[cfg(all(not(feature = "std"), not(feature = "core")))]
compile_error!("Both the `std` and `core` features are disabled. Please enable one of them.");
#[cfg(feature = "core")]
extern crate alloc; extern crate alloc;
mod lib { mod lib {
#[cfg(all(not(feature = "std"), feature = "core"))] #[cfg(feature = "core")]
pub mod std { pub mod std {
#[macro_use] #[macro_use]
pub use alloc::{boxed, string, vec}; pub use alloc::{boxed, string, vec};