FIX: Fix serde feature for const gen

Author: bluss

src/array_string.rs

@@ -533,10 +533,10 @@ impl<'de, const CAP: usize> Deserialize<'de> for ArrayString<CAP>
         use serde::de::{self, Visitor};
         use std::marker::PhantomData;
 
-        struct ArrayStringVisitor<const CAP: usize>(PhantomData([u8; CAP]));
+        struct ArrayStringVisitor<const CAP: usize>(PhantomData<[u8; CAP]>);
 
-        impl<'de, const CAP: usize> Visitor<'de> for ArrayStringVisitor {
-            type Value = ArrayString;
+        impl<'de, const CAP: usize> Visitor<'de> for ArrayStringVisitor<CAP> {
+            type Value = ArrayString<CAP>;
 
             fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
                 write!(formatter, "a string no more than {} bytes long", CAP)

src/arrayvec.rs

@@ -1141,17 +1141,17 @@ impl<'de, T: Deserialize<'de>, const CAP: usize> Deserialize<'de> for ArrayVec<T
             type Value = ArrayVec<T, CAP>;
 
             fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-                write!(formatter, "an array with no more than {} items", A::CAPACITY)
+                write!(formatter, "an array with no more than {} items", CAP)
             }
 
             fn visit_seq<SA>(self, mut seq: SA) -> Result<Self::Value, SA::Error>
                 where SA: SeqAccess<'de>,
             {
-                let mut values = ArrayVec::<A>::new();
+                let mut values = ArrayVec::<T, CAP>::new();
 
                 while let Some(value) = seq.next_element()? {
                     if let Err(_) = values.try_push(value) {
-                        return Err(SA::Error::invalid_length(A::CAPACITY + 1, &self));
+                        return Err(SA::Error::invalid_length(CAP + 1, &self));
                     }
                 }
 

src/lib.rs

@@ -34,9 +34,6 @@ extern crate serde;
 #[cfg(not(feature="std"))]
 extern crate core as std;
 
-#[cfg(feature="serde")]
-use serde::{Serialize, Deserialize, Serializer, Deserializer};
-
 mod array;
 mod arrayvec_impl;
 mod arrayvec;

tests/serde.rs

@@ -9,7 +9,7 @@ mod array_vec {
 
     #[test]
     fn test_ser_de_empty() {
-        let vec = ArrayVec::<[u32; 0]>::new();
+        let vec = ArrayVec::<u32, 0>::new();
 
         assert_tokens(&vec, &[
             Token::Seq { len: Some(0) },
@@ -20,7 +20,7 @@ mod array_vec {
 
     #[test]
     fn test_ser_de() {
-        let mut vec = ArrayVec::<[u32; 3]>::new();
+        let mut vec = ArrayVec::<u32, 3>::new();
         vec.push(20);
         vec.push(55);
         vec.push(123);
@@ -36,7 +36,7 @@ mod array_vec {
 
     #[test]
     fn test_de_too_large() {
-        assert_de_tokens_error::<ArrayVec<[u32; 2]>>(&[
+        assert_de_tokens_error::<ArrayVec<u32, 2>>(&[
             Token::Seq { len: Some(3) },
             Token::U32(13),
             Token::U32(42),
@@ -52,7 +52,7 @@ mod array_string {
 
     #[test]
     fn test_ser_de_empty() {
-        let string = ArrayString::<[u8; 0]>::new();
+        let string = ArrayString::<0>::new();
 
         assert_tokens(&string, &[
             Token::Str(""),
@@ -62,7 +62,7 @@ mod array_string {
 
     #[test]
     fn test_ser_de() {
-        let string = ArrayString::<[u8; 9]>::from("1234 abcd")
+        let string = ArrayString::<9>::from("1234 abcd")
             .expect("expected exact specified capacity to be enough");
 
         assert_tokens(&string, &[
@@ -72,7 +72,7 @@ mod array_string {
 
     #[test]
     fn test_de_too_large() {
-        assert_de_tokens_error::<ArrayString<[u8; 2]>>(&[
+        assert_de_tokens_error::<ArrayString<2>>(&[
             Token::Str("afd")
         ], "invalid length 3, expected a string no more than 2 bytes long");
     }

tests/tests.rs

@@ -483,7 +483,7 @@ fn test_string() {
     use std::error::Error;
 
     let text = "hello world";
-    let mut s = ArrayString::<[_; 16]>::new();
+    let mut s = ArrayString::<16>::new();
     s.try_push_str(text).unwrap();
     assert_eq!(&s, text);
     assert_eq!(text, &s);
@@ -493,7 +493,7 @@ fn test_string() {
     map.insert(s, 1);
     assert_eq!(map[text], 1);
 
-    let mut t = ArrayString::<[_; 2]>::new();
+    let mut t = ArrayString::<2>::new();
     assert!(t.try_push_str(text).is_err());
     assert_eq!(&t, "");
 
@@ -504,7 +504,7 @@ fn test_string() {
 
     // Test Error trait / try
     let t = || -> Result<(), Box<dyn Error>> {
-        let mut t = ArrayString::<[_; 2]>::new();
+        let mut t = ArrayString::<2>::new();
         t.try_push_str(text)?;
         Ok(())
     }();
@@ -515,15 +515,15 @@ fn test_string() {
 fn test_string_from() {
     let text = "hello world";
 	// Test `from` constructor
-    let u = ArrayString::<[_; 11]>::from(text).unwrap();
+    let u = ArrayString::<11>::from(text).unwrap();
     assert_eq!(&u, text);
     assert_eq!(u.len(), text.len());
 }
 
 #[test]
 fn test_string_parse_from_str() {
     let text = "hello world";
-    let u: ArrayString<[_; 11]> = text.parse().unwrap();
+    let u: ArrayString<11> = text.parse().unwrap();
     assert_eq!(&u, text);
     assert_eq!(u.len(), text.len());
 }
@@ -539,17 +539,17 @@ fn test_string_from_bytes() {
 #[test]
 fn test_string_clone() {
     let text = "hi";
-    let mut s = ArrayString::<[_; 4]>::new();
+    let mut s = ArrayString::<4>::new();
     s.push_str("abcd");
-    let t = ArrayString::<[_; 4]>::from(text).unwrap();
+    let t = ArrayString::<4>::from(text).unwrap();
     s.clone_from(&t);
     assert_eq!(&t, &s);
 }
 
 #[test]
 fn test_string_push() {
     let text = "abcαβγ";
-    let mut s = ArrayString::<[_; 8]>::new();
+    let mut s = ArrayString::<8>::new();
     for c in text.chars() {
         if let Err(_) = s.try_push(c) {
             break;
@@ -645,7 +645,7 @@ fn test_sizes() {
 #[test]
 fn test_default() {
     use std::net;
-    let s: ArrayString<[u8; 4]> = Default::default();
+    let s: ArrayString<4> = Default::default();
     // Something without `Default` implementation.
     let v: ArrayVec<net::TcpStream,  4> = Default::default();
     assert_eq!(s.len(), 0);
@@ -689,6 +689,6 @@ fn test_extend_zst() {
 #[test]
 fn test_try_from_argument() {
     use core::convert::TryFrom;
-    let v = ArrayString::<[u8; 16]>::try_from(format_args!("Hello {}", 123)).unwrap();
+    let v = ArrayString::<16>::try_from(format_args!("Hello {}", 123)).unwrap();
     assert_eq!(&v, "Hello 123");
 }