diff --git a/precompiled/serde_derive/src/lib_from_source.rs b/precompiled/serde_derive/src/lib_from_source.rs index 2427a574a..8783c0585 100644 --- a/precompiled/serde_derive/src/lib_from_source.rs +++ b/precompiled/serde_derive/src/lib_from_source.rs @@ -14,7 +14,6 @@ mod internals; mod pretend; mod ser; mod this; -mod try; use proc_macro::TokenStream; use syn::{parse_macro_input, DeriveInput}; diff --git a/serde_derive/src/de.rs b/serde_derive/src/de.rs index 305a14d91..1434680b8 100644 --- a/serde_derive/src/de.rs +++ b/serde_derive/src/de.rs @@ -710,14 +710,14 @@ fn deserialize_seq( let span = field.original.span(); let func = quote_spanned!(span=> _serde::de::SeqAccess::next_element::<#field_ty>); - quote!(try!(#func(&mut __seq))) + quote!(#func(&mut __seq)?) } Some(path) => { let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path); quote!({ #wrapper _serde::__private::Option::map( - try!(_serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)), + _serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)?, |__wrap| __wrap.value) }) } @@ -824,8 +824,8 @@ fn deserialize_seq_in_place( let write = match field.attrs.deserialize_with() { None => { quote! { - if let _serde::__private::None = try!(_serde::de::SeqAccess::next_element_seed(&mut __seq, - _serde::__private::de::InPlaceSeed(&mut self.place.#member))) + if let _serde::__private::None = _serde::de::SeqAccess::next_element_seed(&mut __seq, + _serde::__private::de::InPlaceSeed(&mut self.place.#member))? { #value_if_none } @@ -835,7 +835,7 @@ fn deserialize_seq_in_place( let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path); quote!({ #wrapper - match try!(_serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)) { + match _serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)? { _serde::__private::Some(__wrap) => { self.place.#member = __wrap.value; } @@ -887,12 +887,12 @@ fn deserialize_newtype_struct( let span = field.original.span(); let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize); quote! { - try!(#func(__e)) + #func(__e)? } } Some(path) => { quote! { - try!(#path(__e)) + #path(__e)? } } }; @@ -1364,7 +1364,7 @@ fn deserialize_externally_tagged_enum( } } else { quote! { - match try!(_serde::de::EnumAccess::variant(__data)) { + match _serde::de::EnumAccess::variant(__data)? { #(#variant_arms)* } } @@ -1444,9 +1444,9 @@ fn deserialize_internally_tagged_enum( #variants_stmt - let (__tag, __content) = try!(_serde::Deserializer::deserialize_any( + let (__tag, __content) = _serde::Deserializer::deserialize_any( __deserializer, - _serde::__private::de::TaggedContentVisitor::<__Field>::new(#tag, #expecting))); + _serde::__private::de::TaggedContentVisitor::<__Field>::new(#tag, #expecting))?; let __deserializer = _serde::__private::de::ContentDeserializer::<__D::Error>::new(__content); match __tag { @@ -1554,7 +1554,7 @@ fn deserialize_adjacently_tagged_enum( // Advance the map by one key, returning early in case of error. let next_key = quote! { - try!(_serde::de::MapAccess::next_key_seed(&mut __map, #tag_or_content)) + _serde::de::MapAccess::next_key_seed(&mut __map, #tag_or_content)? }; // When allowing unknown fields, we want to transparently step through keys @@ -1567,7 +1567,7 @@ fn deserialize_adjacently_tagged_enum( while let _serde::__private::Some(__k) = #next_key { match __k { _serde::__private::de::TagContentOtherField::Other => { - let _ = try!(_serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)); + let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; continue; }, _serde::__private::de::TagContentOtherField::Tag => { @@ -1602,14 +1602,14 @@ fn deserialize_adjacently_tagged_enum( let finish_content_then_tag = if variant_arms.is_empty() { quote! { - match try!(_serde::de::MapAccess::next_value::<__Field>(&mut __map)) {} + match _serde::de::MapAccess::next_value::<__Field>(&mut __map)? {} } } else { quote! { - let __ret = try!(match try!(_serde::de::MapAccess::next_value(&mut __map)) { + let __ret = match _serde::de::MapAccess::next_value(&mut __map)? { // Deserialize the buffered content now that we know the variant. #(#variant_arms)* - }); + }?; // Visit remaining keys, looking for duplicates. #visit_remaining_keys } @@ -1662,7 +1662,7 @@ fn deserialize_adjacently_tagged_enum( // First key is the tag. _serde::__private::Some(_serde::__private::de::TagOrContentField::Tag) => { // Parse the tag. - let __field = try!(_serde::de::MapAccess::next_value(&mut __map)); + let __field = _serde::de::MapAccess::next_value(&mut __map)?; // Visit the second key. match #next_relevant_key { // Second key is a duplicate of the tag. @@ -1671,12 +1671,12 @@ fn deserialize_adjacently_tagged_enum( } // Second key is the content. _serde::__private::Some(_serde::__private::de::TagOrContentField::Content) => { - let __ret = try!(_serde::de::MapAccess::next_value_seed(&mut __map, + let __ret = _serde::de::MapAccess::next_value_seed(&mut __map, __Seed { field: __field, marker: _serde::__private::PhantomData, lifetime: _serde::__private::PhantomData, - })); + })?; // Visit remaining keys, looking for duplicates. #visit_remaining_keys } @@ -1687,7 +1687,7 @@ fn deserialize_adjacently_tagged_enum( // First key is the content. _serde::__private::Some(_serde::__private::de::TagOrContentField::Content) => { // Buffer up the content. - let __content = try!(_serde::de::MapAccess::next_value::<_serde::__private::de::Content>(&mut __map)); + let __content = _serde::de::MapAccess::next_value::<_serde::__private::de::Content>(&mut __map)?; // Visit the second key. match #next_relevant_key { // Second key is the tag. @@ -1717,17 +1717,17 @@ fn deserialize_adjacently_tagged_enum( __A: _serde::de::SeqAccess<#delife>, { // Visit the first element - the tag. - match try!(_serde::de::SeqAccess::next_element(&mut __seq)) { + match _serde::de::SeqAccess::next_element(&mut __seq)? { _serde::__private::Some(__field) => { // Visit the second element - the content. - match try!(_serde::de::SeqAccess::next_element_seed( + match _serde::de::SeqAccess::next_element_seed( &mut __seq, __Seed { field: __field, marker: _serde::__private::PhantomData, lifetime: _serde::__private::PhantomData, }, - )) { + )? { _serde::__private::Some(__ret) => _serde::__private::Ok(__ret), // There is no second element. _serde::__private::None => { @@ -1797,7 +1797,7 @@ fn deserialize_untagged_enum_after( let fallthrough_msg = cattrs.expecting().unwrap_or(&fallthrough_msg); quote_block! { - let __content = try!(<_serde::__private::de::Content as _serde::Deserialize>::deserialize(__deserializer)); + let __content = <_serde::__private::de::Content as _serde::Deserialize>::deserialize(__deserializer)?; let __deserializer = _serde::__private::de::ContentRefDeserializer::<__D::Error>::new(&__content); #( @@ -1830,7 +1830,7 @@ fn deserialize_externally_tagged_variant( Style::Unit => { let this_value = ¶ms.this_value; quote_block! { - try!(_serde::de::VariantAccess::unit_variant(__variant)); + _serde::de::VariantAccess::unit_variant(__variant)?; _serde::__private::Ok(#this_value::#variant_ident) } } @@ -1879,7 +1879,7 @@ fn deserialize_internally_tagged_variant( quote!((#default)) }); quote_block! { - try!(_serde::Deserializer::deserialize_any(#deserializer, _serde::__private::de::InternallyTaggedUnitVisitor::new(#type_name, #variant_name))); + _serde::Deserializer::deserialize_any(#deserializer, _serde::__private::de::InternallyTaggedUnitVisitor::new(#type_name, #variant_name))?; _serde::__private::Ok(#this_value::#variant_ident #default) } } @@ -1965,7 +1965,7 @@ fn deserialize_externally_tagged_newtype_variant( if field.attrs.skip_deserializing() { let default = Expr(expr_is_missing(field, cattrs)); return quote_block! { - try!(_serde::de::VariantAccess::unit_variant(__variant)); + _serde::de::VariantAccess::unit_variant(__variant)?; _serde::__private::Ok(#this_value::#variant_ident(#default)) }; } @@ -2540,7 +2540,7 @@ fn deserialize_map( let func = quote_spanned!(span=> _serde::de::MapAccess::next_value::<#field_ty>); quote! { - try!(#func(&mut __map)) + #func(&mut __map)? } } Some(path) => { @@ -2572,14 +2572,14 @@ fn deserialize_map( __Field::__other(__name) => { __collect.push(_serde::__private::Some(( __name, - try!(_serde::de::MapAccess::next_value(&mut __map))))); + _serde::de::MapAccess::next_value(&mut __map)?))); } }) } else if cattrs.deny_unknown_fields() { None } else { Some(quote! { - _ => { let _ = try!(_serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)); } + _ => { let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; } }) }; @@ -2587,14 +2587,14 @@ fn deserialize_map( let match_keys = if cattrs.deny_unknown_fields() && all_skipped { quote! { // FIXME: Once feature(exhaustive_patterns) is stable: - // let _serde::__private::None::<__Field> = try!(_serde::de::MapAccess::next_key(&mut __map)); + // let _serde::__private::None::<__Field> = _serde::de::MapAccess::next_key(&mut __map)?; _serde::__private::Option::map( - try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)), + _serde::de::MapAccess::next_key::<__Field>(&mut __map)?, |__impossible| match __impossible {}); } } else { quote! { - while let _serde::__private::Some(__key) = try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)) { + while let _serde::__private::Some(__key) = _serde::de::MapAccess::next_key::<__Field>(&mut __map)? { match __key { #(#value_arms)* #ignored_arm @@ -2630,10 +2630,10 @@ fn deserialize_map( Some(path) => quote!(#path), }; quote! { - let #name: #field_ty = try!(#func( + let #name: #field_ty = #func( _serde::__private::de::FlatMapDeserializer( &mut __collect, - _serde::__private::PhantomData))); + _serde::__private::PhantomData))?; } }); @@ -2780,7 +2780,7 @@ fn deserialize_map_in_place( let visit = match field.attrs.deserialize_with() { None => { quote! { - try!(_serde::de::MapAccess::next_value_seed(&mut __map, _serde::__private::de::InPlaceSeed(&mut self.place.#member))) + _serde::de::MapAccess::next_value_seed(&mut __map, _serde::__private::de::InPlaceSeed(&mut self.place.#member))? } } Some(path) => { @@ -2812,7 +2812,7 @@ fn deserialize_map_in_place( None } else { Some(quote! { - _ => { let _ = try!(_serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)); } + _ => { let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; } }) }; @@ -2821,14 +2821,14 @@ fn deserialize_map_in_place( let match_keys = if cattrs.deny_unknown_fields() && all_skipped { quote! { // FIXME: Once feature(exhaustive_patterns) is stable: - // let _serde::__private::None::<__Field> = try!(_serde::de::MapAccess::next_key(&mut __map)); + // let _serde::__private::None::<__Field> = _serde::de::MapAccess::next_key(&mut __map)?; _serde::__private::Option::map( - try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)), + _serde::de::MapAccess::next_key::<__Field>(&mut __map)?, |__impossible| match __impossible {}); } } else { quote! { - while let _serde::__private::Some(__key) = try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)) { + while let _serde::__private::Some(__key) = _serde::de::MapAccess::next_key::<__Field>(&mut __map)? { match __key { #(#value_arms_from)* #ignored_arm @@ -2925,7 +2925,7 @@ fn wrap_deserialize_with( __D: _serde::Deserializer<#delife>, { _serde::__private::Ok(__DeserializeWith { - value: try!(#deserialize_with(__deserializer)), + value: #deserialize_with(__deserializer)?, phantom: _serde::__private::PhantomData, lifetime: _serde::__private::PhantomData, }) @@ -3035,7 +3035,7 @@ fn expr_is_missing(field: &Field, cattrs: &attr::Container) -> Fragment { let span = field.original.span(); let func = quote_spanned!(span=> _serde::__private::de::missing_field); quote_expr! { - try!(#func(#name)) + #func(#name)? } } Some(_) => { diff --git a/serde_derive/src/dummy.rs b/serde_derive/src/dummy.rs index 646da540d..095f950f3 100644 --- a/serde_derive/src/dummy.rs +++ b/serde_derive/src/dummy.rs @@ -1,10 +1,7 @@ -use crate::try; use proc_macro2::TokenStream; use quote::quote; pub fn wrap_in_const(serde_path: Option<&syn::Path>, code: TokenStream) -> TokenStream { - let try_replacement = try::replacement(); - let use_serde = match serde_path { Some(path) => quote! { use #path as _serde; @@ -20,7 +17,6 @@ pub fn wrap_in_const(serde_path: Option<&syn::Path>, code: TokenStream) -> Token #[allow(non_upper_case_globals, unused_attributes, unused_qualifications)] const _: () = { #use_serde - #try_replacement #code }; } diff --git a/serde_derive/src/lib.rs b/serde_derive/src/lib.rs index d966d8355..a7d32bb13 100644 --- a/serde_derive/src/lib.rs +++ b/serde_derive/src/lib.rs @@ -90,7 +90,6 @@ mod dummy; mod pretend; mod ser; mod this; -mod try; #[cfg(precompiled)] macro_rules! parse_macro_input { diff --git a/serde_derive/src/ser.rs b/serde_derive/src/ser.rs index 951573ca4..1792d3fec 100644 --- a/serde_derive/src/ser.rs +++ b/serde_derive/src/ser.rs @@ -282,7 +282,7 @@ fn serialize_tuple_struct( .fold(quote!(0), |sum, expr| quote!(#sum + #expr)); quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_tuple_struct(__serializer, #type_name, #len)); + let #let_mut __serde_state = _serde::Serializer::serialize_tuple_struct(__serializer, #type_name, #len)?; #(#serialize_stmts)* _serde::ser::SerializeTupleStruct::end(__serde_state) } @@ -304,7 +304,7 @@ fn serialize_struct_tag_field(cattrs: &attr::Container, struct_trait: &StructTra let type_name = cattrs.name().serialize_name(); let func = struct_trait.serialize_field(Span::call_site()); quote! { - try!(#func(&mut __serde_state, #tag, #type_name)); + #func(&mut __serde_state, #tag, #type_name)?; } } _ => quote! {}, @@ -345,7 +345,7 @@ fn serialize_struct_as_struct( ); quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_struct(__serializer, #type_name, #len)); + let #let_mut __serde_state = _serde::Serializer::serialize_struct(__serializer, #type_name, #len)?; #tag_field #(#serialize_fields)* _serde::ser::SerializeStruct::end(__serde_state) @@ -389,7 +389,7 @@ fn serialize_struct_as_map( }; quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_map(__serializer, #len)); + let #let_mut __serde_state = _serde::Serializer::serialize_map(__serializer, #len)?; #tag_field #(#serialize_fields)* _serde::ser::SerializeMap::end(__serde_state) @@ -593,10 +593,10 @@ fn serialize_internally_tagged_variant( match effective_style(variant) { Style::Unit => { quote_block! { - let mut __struct = try!(_serde::Serializer::serialize_struct( - __serializer, #type_name, 1)); - try!(_serde::ser::SerializeStruct::serialize_field( - &mut __struct, #tag, #variant_name)); + let mut __struct = _serde::Serializer::serialize_struct( + __serializer, #type_name, 1)?; + _serde::ser::SerializeStruct::serialize_field( + &mut __struct, #tag, #variant_name)?; _serde::ser::SerializeStruct::end(__struct) } } @@ -650,10 +650,10 @@ fn serialize_adjacently_tagged_variant( match effective_style(variant) { Style::Unit => { return quote_block! { - let mut __struct = try!(_serde::Serializer::serialize_struct( - __serializer, #type_name, 1)); - try!(_serde::ser::SerializeStruct::serialize_field( - &mut __struct, #tag, #variant_name)); + let mut __struct = _serde::Serializer::serialize_struct( + __serializer, #type_name, 1)?; + _serde::ser::SerializeStruct::serialize_field( + &mut __struct, #tag, #variant_name)?; _serde::ser::SerializeStruct::end(__struct) }; } @@ -667,12 +667,12 @@ fn serialize_adjacently_tagged_variant( let span = field.original.span(); let func = quote_spanned!(span=> _serde::ser::SerializeStruct::serialize_field); return quote_block! { - let mut __struct = try!(_serde::Serializer::serialize_struct( - __serializer, #type_name, 2)); - try!(_serde::ser::SerializeStruct::serialize_field( - &mut __struct, #tag, #variant_name)); - try!(#func( - &mut __struct, #content, #field_expr)); + let mut __struct = _serde::Serializer::serialize_struct( + __serializer, #type_name, 2)?; + _serde::ser::SerializeStruct::serialize_field( + &mut __struct, #tag, #variant_name)?; + #func( + &mut __struct, #content, #field_expr)?; _serde::ser::SerializeStruct::end(__struct) }; } @@ -732,15 +732,15 @@ fn serialize_adjacently_tagged_variant( } } - let mut __struct = try!(_serde::Serializer::serialize_struct( - __serializer, #type_name, 2)); - try!(_serde::ser::SerializeStruct::serialize_field( - &mut __struct, #tag, #variant_name)); - try!(_serde::ser::SerializeStruct::serialize_field( + let mut __struct = _serde::Serializer::serialize_struct( + __serializer, #type_name, 2)?; + _serde::ser::SerializeStruct::serialize_field( + &mut __struct, #tag, #variant_name)?; + _serde::ser::SerializeStruct::serialize_field( &mut __struct, #content, &__AdjacentlyTagged { data: (#(#fields_ident,)*), phantom: _serde::__private::PhantomData::<#this_type #ty_generics>, - })); + })?; _serde::ser::SerializeStruct::end(__struct) } } @@ -830,21 +830,21 @@ fn serialize_tuple_variant( variant_name, } => { quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_tuple_variant( + let #let_mut __serde_state = _serde::Serializer::serialize_tuple_variant( __serializer, #type_name, #variant_index, #variant_name, - #len)); + #len)?; #(#serialize_stmts)* _serde::ser::SerializeTupleVariant::end(__serde_state) } } TupleVariant::Untagged => { quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_tuple( + let #let_mut __serde_state = _serde::Serializer::serialize_tuple( __serializer, - #len)); + #len)?; #(#serialize_stmts)* _serde::ser::SerializeTuple::end(__serde_state) } @@ -907,40 +907,40 @@ fn serialize_struct_variant( variant_name, } => { quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_struct_variant( + let #let_mut __serde_state = _serde::Serializer::serialize_struct_variant( __serializer, #name, #variant_index, #variant_name, #len, - )); + )?; #(#serialize_fields)* _serde::ser::SerializeStructVariant::end(__serde_state) } } StructVariant::InternallyTagged { tag, variant_name } => { quote_block! { - let mut __serde_state = try!(_serde::Serializer::serialize_struct( + let mut __serde_state = _serde::Serializer::serialize_struct( __serializer, #name, #len + 1, - )); - try!(_serde::ser::SerializeStruct::serialize_field( + )?; + _serde::ser::SerializeStruct::serialize_field( &mut __serde_state, #tag, #variant_name, - )); + )?; #(#serialize_fields)* _serde::ser::SerializeStruct::end(__serde_state) } } StructVariant::Untagged => { quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_struct( + let #let_mut __serde_state = _serde::Serializer::serialize_struct( __serializer, #name, #len, - )); + )?; #(#serialize_fields)* _serde::ser::SerializeStruct::end(__serde_state) } @@ -990,9 +990,9 @@ fn serialize_struct_variant_with_flatten( __S: _serde::Serializer, { let (#(#members,)*) = self.data; - let #let_mut __serde_state = try!(_serde::Serializer::serialize_map( + let #let_mut __serde_state = _serde::Serializer::serialize_map( __serializer, - _serde::__private::None)); + _serde::__private::None)?; #(#serialize_fields)* _serde::ser::SerializeMap::end(__serde_state) } @@ -1011,23 +1011,23 @@ fn serialize_struct_variant_with_flatten( } StructVariant::InternallyTagged { tag, variant_name } => { quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_map( + let #let_mut __serde_state = _serde::Serializer::serialize_map( __serializer, - _serde::__private::None)); - try!(_serde::ser::SerializeMap::serialize_entry( + _serde::__private::None)?; + _serde::ser::SerializeMap::serialize_entry( &mut __serde_state, #tag, #variant_name, - )); + )?; #(#serialize_fields)* _serde::ser::SerializeMap::end(__serde_state) } } StructVariant::Untagged => { quote_block! { - let #let_mut __serde_state = try!(_serde::Serializer::serialize_map( + let #let_mut __serde_state = _serde::Serializer::serialize_map( __serializer, - _serde::__private::None)); + _serde::__private::None)?; #(#serialize_fields)* _serde::ser::SerializeMap::end(__serde_state) } @@ -1072,7 +1072,7 @@ fn serialize_tuple_struct_visitor( let span = field.original.span(); let func = tuple_trait.serialize_element(span); let ser = quote! { - try!(#func(&mut __serde_state, #field_expr)); + #func(&mut __serde_state, #field_expr)?; }; match skip { @@ -1116,12 +1116,12 @@ fn serialize_struct_visitor( let ser = if field.attrs.flatten() { let func = quote_spanned!(span=> _serde::Serialize::serialize); quote! { - try!(#func(&#field_expr, _serde::__private::ser::FlatMapSerializer(&mut __serde_state))); + #func(&#field_expr, _serde::__private::ser::FlatMapSerializer(&mut __serde_state))?; } } else { let func = struct_trait.serialize_field(span); quote! { - try!(#func(&mut __serde_state, #key_expr, #field_expr)); + #func(&mut __serde_state, #key_expr, #field_expr)?; } }; @@ -1133,7 +1133,7 @@ fn serialize_struct_visitor( if !#skip { #ser } else { - try!(#skip_func(&mut __serde_state, #key_expr)); + #skip_func(&mut __serde_state, #key_expr)?; } } } else { @@ -1233,7 +1233,7 @@ fn wrap_serialize_with( // Serialization of an empty struct results in code like: // -// let mut __serde_state = try!(serializer.serialize_struct("S", 0)); +// let mut __serde_state = serializer.serialize_struct("S", 0)?; // _serde::ser::SerializeStruct::end(__serde_state) // // where we want to omit the `mut` to avoid a warning. diff --git a/serde_derive/src/try.rs b/serde_derive/src/try.rs deleted file mode 100644 index 54967ebf5..000000000 --- a/serde_derive/src/try.rs +++ /dev/null @@ -1,22 +0,0 @@ -use proc_macro2::TokenStream; -use quote::quote; - -// None of our generated code requires the `From::from` error conversion -// performed by the standard library's `try!` macro. With this simplified macro -// we see a significant improvement in type checking and borrow checking time of -// the generated code and a slight improvement in binary size. -pub fn replacement() -> TokenStream { - quote! { - #[allow(unused_macros)] - macro_rules! try { - ($__expr:expr) => { - match $__expr { - _serde::__private::Ok(__val) => __val, - _serde::__private::Err(__err) => { - return _serde::__private::Err(__err); - } - } - } - } - } -}