salvo_core 0.91.1

Salvo is a powerful web framework that can make your work easier.
Documentation 
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use std::borrow::Cow;

use serde::de::value::Error as ValError;
use serde::de::{Deserializer, Error as DeError, IntoDeserializer, Visitor};
use serde::forward_to_deserialize_any;

use super::ValueEnumAccess;

macro_rules! forward_cow_parsed_value {
    ($($ty:ident => $method:ident,)*) => {
        $(
            fn $method<V>(self, visitor: V) -> Result<V::Value, Self::Error>
                where V: Visitor<'de>
            {
                match self.0.parse::<$ty>() {
                    Ok(val) => val.into_deserializer().$method(visitor),
                    Err(e) => Err(DeError::custom(e))
                }
            }
        )*
    }
}

#[derive(Debug)]
pub(super) struct CowValue<'de>(pub(super) Cow<'de, str>);
impl<'de> IntoDeserializer<'de> for CowValue<'de> {
    type Deserializer = Self;

    fn into_deserializer(self) -> Self::Deserializer {
        self
    }
}

impl<'de> Deserializer<'de> for CowValue<'de> {
    type Error = ValError;

    #[inline]
    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
    where
        V: Visitor<'de>,
    {
        match self.0 {
            Cow::Borrowed(value) => visitor.visit_borrowed_str(value),
            Cow::Owned(value) => visitor.visit_string(value),
        }
    }

    #[inline]
    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
    where
        V: Visitor<'de>,
    {
        visitor.visit_some(self)
    }

    #[inline]
    fn deserialize_enum<V>(
        self,
        _name: &'static str,
        _variants: &'static [&'static str],
        visitor: V,
    ) -> Result<V::Value, Self::Error>
    where
        V: Visitor<'de>,
    {
        visitor.visit_enum(ValueEnumAccess(self.0))
    }

    #[inline]
    fn deserialize_newtype_struct<V>(
        self,
        _name: &'static str,
        visitor: V,
    ) -> Result<V::Value, Self::Error>
    where
        V: Visitor<'de>,
    {
        visitor.visit_newtype_struct(self)
    }

    forward_to_deserialize_any! {
        char
        str
        string
        unit
        bytes
        byte_buf
        unit_struct
        tuple_struct
        struct
        identifier
        tuple
        ignored_any
        seq
        map
    }

    forward_cow_parsed_value! {
        bool => deserialize_bool,
        u8 => deserialize_u8,
        u16 => deserialize_u16,
        u32 => deserialize_u32,
        u64 => deserialize_u64,
        i8 => deserialize_i8,
        i16 => deserialize_i16,
        i32 => deserialize_i32,
        i64 => deserialize_i64,
        f32 => deserialize_f32,
        f64 => deserialize_f64,
    }
}