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
135
136
137
138
139
140
141
142
143
144
145

use arrayvec::ArrayString;

use crate::constants::{MAX_INF_LEN, MAX_MIN_LEN, MAX_NAN_LEN};
use crate::utils::{InfinityStr, MinusSignStr, NanStr};
use crate::{CustomFormatBuilder, Format, Grouping, Locale};

/// Type for representing your own custom formats. Implements [`Format`].
///
/// # Example
/// ```rust
/// use num_format::{Buffer, Error, CustomFormat, Grouping};
///
/// fn main() -> Result<(), Error> {
///     let format = CustomFormat::builder()
///         .grouping(Grouping::Indian)
///         .minus_sign("--")
///         .separator(Some('.'))
///         .build()?;
///
///     let mut buf = Buffer::new();
///     buf.write_formatted(&(-1000000), &format);
///     assert_eq!("--10.00.000", buf.as_str());
///
///     Ok(())
/// }
/// ```
///
/// [`Format`]: trait.Format.html
#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "with-serde", derive(Serialize, Deserialize))]
pub struct CustomFormat {
    pub(crate) dec: char,
    pub(crate) grp: Grouping,
    pub(crate) inf: ArrayString<[u8; MAX_INF_LEN]>,
    pub(crate) min: ArrayString<[u8; MAX_MIN_LEN]>,
    pub(crate) nan: ArrayString<[u8; MAX_NAN_LEN]>,
    pub(crate) sep: Option<char>,
}

impl CustomFormat {
    /// Constructs a [`CustomFormatBuilder`].
    ///
    /// [`CustomFormatBuilder`]: struct.CustomFormatBuilder.html
    pub fn builder() -> CustomFormatBuilder {
        CustomFormatBuilder::new()
    }

    /// Turns `self` into a [`CustomFormatBuilder`].
    ///
    /// [`CustomFormatBuilder`]: struct.CustomFormatBuilder.html
    pub fn into_builder(self) -> CustomFormatBuilder {
        self.into()
    }

    /// Returns this format's representation of decimal points.
    pub fn decimal(&self) -> char {
        self.dec
    }

    /// Returns this format's [`Grouping`], which governs how digits are separated (see [`Grouping`]).
    ///
    /// [`Grouping`]: enum.Grouping.html
    pub fn grouping(&self) -> Grouping {
        self.grp
    }

    /// Returns this format's representation of infinity.
    pub fn infinity(&self) -> &str {
        &self.inf
    }

    /// Returns this format's representation of minus signs.
    pub fn minus_sign(&self) -> &str {
        &self.min
    }

    /// Returns this format's representation of NaN.
    pub fn nan(&self) -> &str {
        &self.nan
    }

    /// Returns this format's representation of separators.
    pub fn separator(&self) -> Option<char> {
        self.sep
    }
}

impl Format for CustomFormat {
    fn decimal(&self) -> char {
        self.decimal()
    }

    fn grouping(&self) -> Grouping {
        self.grouping()
    }

    fn infinity(&self) -> InfinityStr<'_> {
        InfinityStr::new(self.infinity()).unwrap()
    }

    fn minus_sign(&self) -> MinusSignStr<'_> {
        MinusSignStr::new(self.minus_sign()).unwrap()
    }

    fn nan(&self) -> NanStr<'_> {
        NanStr::new(self.nan()).unwrap()
    }

    fn separator(&self) -> Option<char> {
        self.separator()
    }
}

impl From<Locale> for CustomFormat {
    fn from(locale: Locale) -> Self {
        Self {
            dec: locale.decimal(),
            grp: locale.grouping(),
            inf: ArrayString::from(locale.infinity()).unwrap(),
            min: ArrayString::from(locale.minus_sign()).unwrap(),
            nan: ArrayString::from(locale.nan()).unwrap(),
            sep: locale.separator(),
        }
    }
}

#[cfg(feature = "std")]
mod standard {
    use arrayvec::ArrayString;

    use crate::{CustomFormat, Environment};

    impl From<Environment> for CustomFormat {
        fn from(environment: Environment) -> Self {
            Self {
                dec: environment.decimal(),
                grp: environment.grouping(),
                inf: ArrayString::from(environment.infinity()).unwrap(),
                min: ArrayString::from(environment.minus_sign()).unwrap(),
                nan: ArrayString::from(environment.nan()).unwrap(),
                sep: environment.separator(),
            }
        }
    }
}