30 lines
840 B
Rust
30 lines
840 B
Rust
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// Written by the Rust Bitcoin developers.
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// SPDX-License-Identifier: CC0-1.0
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//! # Error
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//!
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//! Error handling macros and helpers.
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//!
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/// Formats error.
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///
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/// If `std` feature is OFF appends error source (delimited by `: `). We do this because
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/// `e.source()` is only available in std builds, without this macro the error source is lost for
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/// no-std builds.
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#[macro_export]
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macro_rules! write_err {
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($writer:expr, $string:literal $(, $args:expr)*; $source:expr) => {
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{
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#[cfg(feature = "std")]
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{
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let _ = &$source; // Prevents clippy warnings.
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write!($writer, $string $(, $args)*)
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}
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#[cfg(not(feature = "std"))]
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{
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write!($writer, concat!($string, ": {}") $(, $args)*, $source)
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}
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}
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}
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}
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