chore: use core::error::Error

crates/dyn-abi/src/coerce.rs

@@ -256,8 +256,7 @@ enum Error {
     EmptyHexStringWithoutPrefix,
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {

crates/primitives/src/postgres.rs

@@ -63,7 +63,7 @@ pub enum ToSqlError {
     Overflow(usize, Type),
 }
 
-impl std::error::Error for ToSqlError {}
+impl core::error::Error for ToSqlError {}
 
 /// Convert to Postgres types.
 ///
@@ -225,7 +225,7 @@ pub enum FromSqlError {
     ParseError(Type),
 }
 
-impl std::error::Error for FromSqlError {}
+impl core::error::Error for FromSqlError {}
 
 impl<'a, const BITS: usize, const LIMBS: usize> FromSql<'a> for Signed<BITS, LIMBS> {
     fn accepts(ty: &Type) -> bool {

crates/primitives/src/signed/errors.rs

@@ -48,8 +48,7 @@ impl fmt::Display for ParseSignedError {
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct BigIntConversionError;
 
-#[cfg(feature = "std")]
-impl std::error::Error for BigIntConversionError {}
+impl core::error::Error for BigIntConversionError {}
 
 impl fmt::Display for BigIntConversionError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {

crates/sol-type-parser/src/error.rs

@@ -8,8 +8,7 @@ pub type Result<T, E = Error> = core::result::Result<T, E>;
 #[derive(Clone, PartialEq, Eq)]
 pub struct Error(Repr);
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
 
 impl fmt::Debug for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {

crates/sol-type-parser/src/input.rs

@@ -18,8 +18,7 @@ impl fmt::Display for CustomError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for CustomError {}
+impl core::error::Error for CustomError {}
 
 pub type Input<'a> = winnow::Stateful<&'a str, RecursionCheck>;
 

crates/sol-types/src/types/error.rs

@@ -103,8 +103,7 @@ impl fmt::Display for Revert {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Revert {}
+impl core::error::Error for Revert {}
 
 impl AsRef<str> for Revert {
     #[inline]
@@ -264,8 +263,7 @@ impl fmt::Display for Panic {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Panic {}
+impl core::error::Error for Panic {}
 
 impl SolError for Panic {
     type Parameters<'a> = (crate::sol_data::Uint<256>,);

crates/sol-types/src/types/interface/mod.rs

@@ -2,9 +2,6 @@ use crate::{alloc::string::ToString, Error, Panic, Result, Revert, SolError};
 use alloc::{string::String, vec::Vec};
 use core::{convert::Infallible, fmt, iter::FusedIterator, marker::PhantomData};
 
-#[cfg(feature = "std")]
-use std::error::Error as StdError;
-
 mod event;
 pub use event::SolEventInterface;
 
@@ -211,10 +208,9 @@ impl<T: fmt::Display> fmt::Display for ContractError<T> {
     }
 }
 
-#[cfg(feature = "std")]
-impl<T: StdError + 'static> StdError for ContractError<T> {
+impl<T: core::error::Error + 'static> core::error::Error for ContractError<T> {
     #[inline]
-    fn source(&self) -> Option<&(dyn StdError + 'static)> {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
             Self::CustomError(error) => Some(error),
             Self::Panic(panic) => Some(panic),

crates/syn-solidity/tests/contracts.rs

@@ -100,7 +100,7 @@ impl Drop for GitPatcher<'_> {
     }
 }
 
-fn parse_file(path: &Path) -> Result<File, Box<dyn std::error::Error>> {
+fn parse_file(path: &Path) -> Result<File, Box<dyn core::error::Error>> {
     let solidity = fs::read_to_string(path)?;
     syn::parse_str(&solidity).map_err(Into::into)
 }