feat: optional "ser" to make no_std work

Signed-off-by: Woshiluo Luo <[email protected]>

Author: woshiluo

Cargo.toml

@@ -15,11 +15,12 @@ edition = "2024"
 
 [dependencies]
 serde = { version = "1.0", default-features = false }
-erased-serde = "0.4"
 serde_derive = "1.0"
+erased-serde = { version = "0.4", optional = true }
 
 [features]
-default = ["std"]
+default = ["std", "ser"]
 
+ser = ["dep:erased-serde"]
 std = ["serde/std"]
 alloc = ["serde/alloc"]

src/lib.rs

@@ -20,6 +20,7 @@ extern crate alloc;
 
 pub mod de;
 pub mod error;
+#[cfg(feature = "ser")]
 pub mod ser;
 pub mod utils;
 pub mod value;

src/ser/mod.rs

@@ -73,7 +73,7 @@ pub enum Error {
 }
 
 impl core::fmt::Display for Error {
-    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    fn fmt(&self, formatter: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         write!(formatter, "{:?}", self)
     }
 }
@@ -83,7 +83,7 @@ impl core::error::Error for Error {}
 impl serde::ser::Error for Error {
     fn custom<T>(_msg: T) -> Self
     where
-        T: std::fmt::Display,
+        T: core::fmt::Display,
     {
         Self::Unknown
     }

src/ser/serializer.rs

@@ -1,8 +1,8 @@
-use super::Error;
 use super::patch::PatchList;
 use super::pointer::Pointer;
 use super::string_block::StringBlock;
 use crate::common::*;
+use crate::ser::Error;
 
 #[derive(Clone, Copy)]
 // The enum for current parsing type.