third_party_rust_quote/benches/lib.rs

use quote::quote;

#[allow(unused_macros)]
macro_rules! benchmark {
    (|$ident:ident| $quote:expr) => {
        mod timer;

        use proc_macro::TokenStream;
        use proc_macro2::Ident;

        #[proc_macro]
        pub fn run_quote_benchmark(input: TokenStream) -> TokenStream {
            let input = proc_macro2::TokenStream::from(input);
            let span = input.into_iter().next().unwrap().span();
            let $ident = Ident::new("Response", span);
            timer::time("macro", || proc_macro::TokenStream::from($quote));
            TokenStream::new()
        }
    };
}

#[allow(unused_imports)]
use benchmark;

crate::benchmark! {
    |ident| quote! {
        impl<'de> _serde::Deserialize<'de> for #ident {
            fn deserialize<__D>(__deserializer: __D) -> _serde::export::Result<Self, __D::Error>
            where
                __D: _serde::Deserializer<'de>,
            {
                #[allow(non_camel_case_types)]
                enum __Field {
                    __field0,
                    __field1,
                    __ignore,
                }
                struct __FieldVisitor;
                impl<'de> _serde::de::Visitor<'de> for __FieldVisitor {
                    type Value = __Field;
                    fn expecting(
                        &self,
                        __formatter: &mut _serde::export::Formatter,
                    ) -> _serde::export::fmt::Result {
                        _serde::export::Formatter::write_str(__formatter, "field identifier")
                    }
                    fn visit_u64<__E>(self, __value: u64) -> _serde::export::Result<Self::Value, __E>
                    where
                        __E: _serde::de::Error,
                    {
                        match __value {
                            0u64 => _serde::export::Ok(__Field::__field0),
                            1u64 => _serde::export::Ok(__Field::__field1),
                            _ => _serde::export::Err(_serde::de::Error::invalid_value(
                                _serde::de::Unexpected::Unsigned(__value),
                                &"field index 0 <= i < 2",
                            )),
                        }
                    }
                    fn visit_str<__E>(self, __value: &str) -> _serde::export::Result<Self::Value, __E>
                    where
                        __E: _serde::de::Error,
                    {
                        match __value {
                            "id" => _serde::export::Ok(__Field::__field0),
                            "s" => _serde::export::Ok(__Field::__field1),
                            _ => _serde::export::Ok(__Field::__ignore),
                        }
                    }
                    fn visit_bytes<__E>(
                        self,
                        __value: &[u8],
                    ) -> _serde::export::Result<Self::Value, __E>
                    where
                        __E: _serde::de::Error,
                    {
                        match __value {
                            b"id" => _serde::export::Ok(__Field::__field0),
                            b"s" => _serde::export::Ok(__Field::__field1),
                            _ => _serde::export::Ok(__Field::__ignore),
                        }
                    }
                }
                impl<'de> _serde::Deserialize<'de> for __Field {
                    #[inline]
                    fn deserialize<__D>(__deserializer: __D) -> _serde::export::Result<Self, __D::Error>
                    where
                        __D: _serde::Deserializer<'de>,
                    {
                        _serde::Deserializer::deserialize_identifier(__deserializer, __FieldVisitor)
                    }
                }
                struct __Visitor<'de> {
                    marker: _serde::export::PhantomData<#ident>,
                    lifetime: _serde::export::PhantomData<&'de ()>,
                }
                impl<'de> _serde::de::Visitor<'de> for __Visitor<'de> {
                    type Value = #ident;
                    fn expecting(
                        &self,
                        __formatter: &mut _serde::export::Formatter,
                    ) -> _serde::export::fmt::Result {
                        _serde::export::Formatter::write_str(__formatter, "struct")
                    }
                    #[inline]
                    fn visit_seq<__A>(
                        self,
                        mut __seq: __A,
                    ) -> _serde::export::Result<Self::Value, __A::Error>
                    where
                        __A: _serde::de::SeqAccess<'de>,
                    {
                        let __field0 =
                            match try!(_serde::de::SeqAccess::next_element::<u64>(&mut __seq)) {
                                _serde::export::Some(__value) => __value,
                                _serde::export::None => {
                                    return _serde::export::Err(_serde::de::Error::invalid_length(
                                        0usize,
                                        &"struct with 2 elements",
                                    ));
                                }
                            };
                        let __field1 =
                            match try!(_serde::de::SeqAccess::next_element::<String>(&mut __seq)) {
                                _serde::export::Some(__value) => __value,
                                _serde::export::None => {
                                    return _serde::export::Err(_serde::de::Error::invalid_length(
                                        1usize,
                                        &"struct with 2 elements",
                                    ));
                                }
                            };
                        _serde::export::Ok(#ident {
                            id: __field0,
                            s: __field1,
                        })
                    }
                    #[inline]
                    fn visit_map<__A>(
                        self,
                        mut __map: __A,
                    ) -> _serde::export::Result<Self::Value, __A::Error>
                    where
                        __A: _serde::de::MapAccess<'de>,
                    {
                        let mut __field0: _serde::export::Option<u64> = _serde::export::None;
                        let mut __field1: _serde::export::Option<String> = _serde::export::None;
                        while let _serde::export::Some(__key) =
                            try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map))
                        {
                            match __key {
                                __Field::__field0 => {
                                    if _serde::export::Option::is_some(&__field0) {
                                        return _serde::export::Err(
                                            <__A::Error as _serde::de::Error>::duplicate_field("id"),
                                        );
                                    }
                                    __field0 = _serde::export::Some(
                                        try!(_serde::de::MapAccess::next_value::<u64>(&mut __map)),
                                    );
                                }
                                __Field::__field1 => {
                                    if _serde::export::Option::is_some(&__field1) {
                                        return _serde::export::Err(
                                            <__A::Error as _serde::de::Error>::duplicate_field("s"),
                                        );
                                    }
                                    __field1 = _serde::export::Some(
                                        try!(_serde::de::MapAccess::next_value::<String>(&mut __map)),
                                    );
                                }
                                _ => {
                                    let _ = try!(_serde::de::MapAccess::next_value::<
                                        _serde::de::IgnoredAny,
                                    >(&mut __map));
                                }
                            }
                        }
                        let __field0 = match __field0 {
                            _serde::export::Some(__field0) => __field0,
                            _serde::export::None => try!(_serde::private::de::missing_field("id")),
                        };
                        let __field1 = match __field1 {
                            _serde::export::Some(__field1) => __field1,
                            _serde::export::None => try!(_serde::private::de::missing_field("s")),
                        };
                        _serde::export::Ok(#ident {
                            id: __field0,
                            s: __field1,
                        })
                    }
                }
                const FIELDS: &'static [&'static str] = &["id", "s"];
                _serde::Deserializer::deserialize_struct(
                    __deserializer,
                    stringify!(#ident),
                    FIELDS,
                    __Visitor {
                        marker: _serde::export::PhantomData::<#ident>,
                        lifetime: _serde::export::PhantomData,
                    },
                )
            }
        }
    }
}