Fix no_std build

1 files changed, 10 insertions, 5 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 935fa96..40a2322 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,8 +5,12 @@
 #![warn(clippy::redundant_closure_for_method_calls)]
 
 extern crate alloc;
+use alloc::borrow::ToOwned;
+use alloc::boxed::Box;
+use alloc::string::String;
 use alloc::sync::Arc;
 use alloc::vec::Vec;
+use alloc::{format, vec};
 use core::fmt;
 use core::mem::take;
 
@@ -117,6 +121,7 @@ pub enum Error {
 impl fmt::Display for Error {
 	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 		match self {
+			#[cfg(feature = "std")]
 			Self::IO(message, io_err) => write!(f, "{message}: {io_err}"),
 			Self::IllegalCharacter(location, c) => {
 				write!(f, "{location}: illegal character {c:?}")
@@ -174,17 +179,17 @@ impl fmt::Display for Error {
 }
 
 impl core::error::Error for Error {
-	fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+	fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
+		#[cfg(feature = "std")]
 		if let Error::IO(_, e) = self {
-			Some(e)
-		} else {
-			None
+			return Some(e);
 		}
+		None
 	}
 }
 
 /// Type alias for [`std::result::Result`] with [`Error`] as the error.
-pub type Result<T> = std::result::Result<T, Error>;
+pub type Result<T> = core::result::Result<T, Error>;
 
 fn parse_int(location: &Location, string: &str) -> Result<i64> {
 	let bad_int = || Error::BadInt(location.clone(), string.into());