1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).

use alloc::format;
use core::convert::TryFrom;
use smallvec::SmallVec;

pub mod reference {
    use super::super::reference::Skeleton;
    use super::*;

    #[cfg(feature = "datagen")]
    use ::serde::{ser, Serialize};
    use serde::{de, Deserialize, Deserializer};
    /// This is an implementation of the serde deserialization visitor pattern.
    #[allow(clippy::upper_case_acronyms)]
    pub(super) struct DeserializeSkeletonUTS35String;

    impl de::Visitor<'_> for DeserializeSkeletonUTS35String {
        type Value = Skeleton;

        fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
            write!(formatter, "Expected to find a valid skeleton.")
        }

        /// A [`Skeleton`] serialized into a string follows UTS-35.
        /// <https://unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table>
        /// This string consists of a symbol that is repeated N times. This string is
        /// deserialized here into the Skeleton format which is used in memory
        /// when working with formatting datetimes.
        fn visit_str<E>(self, skeleton_string: &str) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            Skeleton::try_from(skeleton_string).map_err(|err| {
                de::Error::invalid_value(
                    de::Unexpected::Other(&format!("{skeleton_string:?} {err}")),
                    &"field symbols representing a skeleton",
                )
            })
        }
    }

    impl<'de> Deserialize<'de> for Skeleton {
        fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
        where
            D: Deserializer<'de>,
        {
            if deserializer.is_human_readable() {
                deserializer.deserialize_str(DeserializeSkeletonUTS35String)
            } else {
                let sv = SmallVec::deserialize(deserializer)?;
                Ok(sv.into())
            }
        }
    }

    #[cfg(feature = "datagen")]
    impl Serialize for Skeleton {
        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
        where
            S: ser::Serializer,
        {
            if serializer.is_human_readable() {
                // Serialize into the UTS 35 string representation.
                let string = self.to_string();
                serializer.serialize_str(&string)
            } else {
                self.0.serialize(serializer)
            }
        }
    }
}

pub mod runtime {
    use super::super::runtime::Skeleton;
    use zerovec::ZeroVec;

    #[cfg(feature = "datagen")]
    use ::serde::{ser, Serialize};
    use serde::{de, Deserialize, Deserializer};
    /// This is an implementation of the serde deserialization visitor pattern.
    #[allow(clippy::upper_case_acronyms)]
    struct DeserializeSkeletonUTS35String;

    impl<'de> de::Visitor<'de> for DeserializeSkeletonUTS35String {
        type Value = Skeleton<'de>;

        fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
            write!(formatter, "Expected to find a valid skeleton.")
        }

        fn visit_borrowed_str<E>(self, skeleton_string: &'de str) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            let reference_deserializer = super::reference::DeserializeSkeletonUTS35String;
            let skeleton = reference_deserializer.visit_str(skeleton_string)?;

            Ok(skeleton.into())
        }
    }

    impl<'de> Deserialize<'de> for Skeleton<'de> {
        fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
        where
            D: Deserializer<'de>,
        {
            if deserializer.is_human_readable() {
                deserializer.deserialize_str(DeserializeSkeletonUTS35String)
            } else {
                let zv = ZeroVec::deserialize(deserializer)?;
                Ok(zv.into())
            }
        }
    }

    #[cfg(feature = "datagen")]
    impl Serialize for Skeleton<'_> {
        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
        where
            S: ser::Serializer,
        {
            if serializer.is_human_readable() {
                // Serialize into the UTS 35 string representation.
                let string = self.to_string();
                serializer.serialize_str(&string)
            } else {
                self.0.serialize(serializer)
            }
        }
    }
}