Merge pull request #114 from media-io/update

Update

.travis.yml

@@ -16,6 +16,9 @@ rust:
   - 1.47.0
   - 1.48.0
   - 1.49.0
+  - 1.50.0
+  - 1.51.0
+  - 1.52.0
   - stable
   - beta
   - nightly

yaserde_derive/src/common/attribute.rs

@@ -44,8 +44,7 @@ impl YaSerdeAttribute {
 
     for attr in attrs.iter().filter(|a| a.path.is_ident("yaserde")) {
       let mut attr_iter = attr.clone().tokens.into_iter();
-      if let Some(token) = attr_iter.next() {
-        if let TokenTree::Group(group) = token {
+      if let Some(TokenTree::Group(group)) = attr_iter.next() {
         if group.delimiter() == Delimiter::Parenthesis {
           let mut attr_iter = group.stream().into_iter();
 
@@ -94,7 +93,6 @@ impl YaSerdeAttribute {
         }
       }
     }
-    }
 
     YaSerdeAttribute {
       attribute,
@@ -147,7 +145,7 @@ impl YaSerdeAttribute {
           None
         }
       })
-      .filter_map(|x| x)
+      .flatten()
       .collect();
 
     quote!(

yaserde_derive/src/common/field.rs

@@ -240,21 +240,17 @@ impl From<&syn::Field> for Field {
 impl From<&syn::PathSegment> for Field {
   fn from(path_segment: &syn::PathSegment) -> Self {
     if let syn::PathArguments::AngleBracketed(ref args) = path_segment.arguments {
-      if let Some(tt) = args.args.first() {
-        if let syn::GenericArgument::Type(ref argument) = *tt {
-          if let Path(ref path) = *argument {
+      if let Some(syn::GenericArgument::Type(Path(ref path))) = args.args.first() {
         return Field::from(&path.path);
       }
     }
-      }
-    }
     unimplemented!()
   }
 }
 
-impl Into<proc_macro2::TokenStream> for Field {
-  fn into(self) -> proc_macro2::TokenStream {
-    match self {
+impl From<Field> for proc_macro2::TokenStream {
+  fn from(field: Field) -> proc_macro2::TokenStream {
+    match field {
       Field::FieldString => quote! { ::std::string::String },
       Field::FieldBool => quote! { bool },
       Field::FieldI8 => quote! { i8 },
@@ -267,14 +263,14 @@ impl Into<proc_macro2::TokenStream> for Field {
       Field::FieldU64 => quote! { u64 },
       Field::FieldF32 => quote! { f32 },
       Field::FieldF64 => quote! { f64 },
-      _ => panic!("Not a simple type: {:?}", self),
+      _ => panic!("Not a simple type: {:?}", field),
     }
   }
 }
 
-impl Into<String> for &Field {
-  fn into(self) -> String {
-    match self {
+impl From<&Field> for String {
+  fn from(field: &Field) -> String {
+    match field {
       Field::FieldString => "str".to_string(),
       Field::FieldBool => "bool".to_string(),
       Field::FieldI8 => "i8".to_string(),
@@ -287,7 +283,7 @@ impl Into<String> for &Field {
       Field::FieldU64 => "u64".to_string(),
       Field::FieldF32 => "f32".to_string(),
       Field::FieldF64 => "f64".to_string(),
-      _ => panic!("Not a simple type: {:?}", self),
+      _ => panic!("Not a simple type: {:?}", field),
     }
   }
 }

yaserde_derive/src/de/expand_enum.rs

@@ -20,7 +20,7 @@ pub fn parse(
     .variants
     .iter()
     .map(|variant| parse_variant(variant, name))
-    .filter_map(|f| f)
+    .flatten()
     .collect();
 
   let flatten = root_attributes.flatten;
@@ -302,6 +302,6 @@ fn build_unnamed_visitor_calls(
         simple_type => call_simple_type_visitor(simple_type, set_val),
       }
     })
-    .filter_map(|f| f)
+    .flatten()
     .collect()
 }

yaserde_derive/src/de/expand_struct.rs

@@ -57,7 +57,7 @@ pub fn parse(
         build_default_value(&field, Some(type_token), value_builder)
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   let field_visitors: TokenStream = data_struct
@@ -94,7 +94,7 @@ pub fn parse(
       let simple_type_visitor = |simple_type: Field| {
         let visitor = simple_type.get_simple_type_visitor();
         let visitor_label = field.get_visitor_ident(None);
-        let field_type: TokenStream = simple_type.into();
+        let field_type = TokenStream::from(simple_type);
 
         let map_if_bool = if field_type.to_string() == "bool" {
           quote!(match v {
@@ -137,7 +137,7 @@ pub fn parse(
         simple_type => simple_type_visitor(simple_type),
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   let call_visitors: TokenStream = data_struct
@@ -167,7 +167,7 @@ pub fn parse(
 
       let visit_simple = |simple_type: Field, action: TokenStream| {
         let field_visitor = simple_type.get_simple_type_visitor();
-        let field_type: TokenStream = simple_type.into();
+        let field_type = TokenStream::from(simple_type);
         build_call_visitor(
           &field_type,
           &field_visitor,
@@ -192,7 +192,7 @@ pub fn parse(
         simple_type => visit_simple(simple_type, quote! { = value }),
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   let call_flatten_visitors: TokenStream = data_struct
@@ -216,7 +216,7 @@ pub fn parse(
         field_type => unimplemented!(r#""flatten" is not implemented for {:?}"#, field_type),
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   let attributes_loading: TokenStream = data_struct
@@ -283,7 +283,7 @@ pub fn parse(
         simple_type => visit_simple(simple_type, quote! { = value }),
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   let set_text: TokenStream = data_struct
@@ -311,12 +311,12 @@ pub fn parse(
         },
         Field::FieldStruct { .. } | Field::FieldVec { .. } => None,
         simple_type => {
-          let type_token: TokenStream = simple_type.into();
+          let type_token = TokenStream::from(simple_type);
           set_text(&quote! { #type_token::from_str(text_content).unwrap() })
         }
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   let struct_builder: TokenStream = data_struct

yaserde_derive/src/ser/expand_enum.rs

@@ -124,7 +124,7 @@ fn inner_enum_inspector(
                 Field::FieldOption { .. } => None,
               }
             })
-            .filter_map(|x| x)
+            .flatten()
             .collect();
 
           Some(quote! {
@@ -211,7 +211,7 @@ fn inner_enum_inspector(
                 _simple_type => Some(match_field(&write_simple_type)),
               }
             })
-            .filter_map(|x| x)
+            .flatten()
             .collect();
 
           Some(quote! {
@@ -222,6 +222,6 @@ fn inner_enum_inspector(
         }
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect()
 }

yaserde_derive/src/ser/expand_struct.rs

@@ -324,7 +324,7 @@ pub fn serialize(
         },
       }
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect();
 
   implement_serializer(

yaserde_derive/src/ser/namespace.rs

@@ -18,6 +18,6 @@ pub fn generate_namespaces_definition(attributes: &YaSerdeAttribute) -> TokenStr
         .ns(#prefix, #namespace)
       ))
     })
-    .filter_map(|x| x)
+    .flatten()
     .collect()
 }