Fix feature=alloc build

packed_struct/src/internal_prelude/no_std.rs

@@ -19,3 +19,6 @@ pub use core::hash::{Hash, Hasher};
 pub use alloc::vec::Vec;
 #[cfg(feature="alloc")]
 pub use alloc::borrow::Cow;
+#[cfg(feature="alloc")]
+pub use alloc::fmt::Formatter;
+

packed_struct/src/lib.rs

@@ -318,8 +318,6 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
-#![cfg_attr(feature="alloc", feature(alloc))]
-
 extern crate packed_struct_codegen;
 
 #[cfg(feature="alloc")]

packed_struct_codegen/src/pack.rs

@@ -10,6 +10,7 @@ pub struct FieldMidPositioning {
     pub bits_position: BitsPositionParsed,
 }
 
+#[allow(clippy::large_enum_variant)]
 pub enum FieldKind {
     Regular {
         ident: syn::Ident,

packed_struct_codegen/src/pack_codegen_docs.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::to_string_in_format_args)]
+
 use crate::pack::*;
 use crate::common::*;
 use proc_macro2::Span;

packed_struct_codegen/src/pack_parse.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::to_string_in_format_args)]
+
 extern crate quote;
 extern crate syn;
 

packed_struct_codegen/src/pack_parse_attributes.rs

@@ -187,7 +187,7 @@ pub fn parse_position_val(v: &str, multiplier: usize) -> Result<BitsPositionPars
         let n = parse_num(&v)?;
         return Ok(BitsPositionParsed::Start(n * multiplier));
     } else if v.ends_with(':') {
-        let v = v.replace(":", "");
+        let v = v.replace(':', "");
         let n = parse_num(&v)?;
         return Ok(BitsPositionParsed::Start(n * multiplier));
     } else if v.contains(':') || v.contains("..=") {