34 lines
976 B
Rust
34 lines
976 B
Rust
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//! Traits for the message type of a [`Program`](crate::Program).
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/// A trait alias for [`Clone`], but only when the `time-travel`
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/// feature is enabled.
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#[cfg(feature = "time-travel")]
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pub trait MaybeClone: Clone {}
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#[cfg(feature = "time-travel")]
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impl<T> MaybeClone for T where T: Clone {}
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/// A trait alias for [`Clone`], but only when the `time-travel`
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/// feature is enabled.
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#[cfg(not(feature = "time-travel"))]
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pub trait MaybeClone {}
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#[cfg(not(feature = "time-travel"))]
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impl<T> MaybeClone for T {}
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/// A trait alias for [`Debug`](std::fmt::Debug), but only when the
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/// `debug` feature is enabled.
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#[cfg(feature = "debug")]
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pub trait MaybeDebug: std::fmt::Debug {}
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#[cfg(feature = "debug")]
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impl<T> MaybeDebug for T where T: std::fmt::Debug {}
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/// A trait alias for [`Debug`](std::fmt::Debug), but only when the
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/// `debug` feature is enabled.
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#[cfg(not(feature = "debug"))]
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pub trait MaybeDebug {}
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#[cfg(not(feature = "debug"))]
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impl<T> MaybeDebug for T {}
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