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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182


use ::TryInto;

use std::fmt;

/// Parses a String into a Value, first attempting bool, i64, and f64.
///
/// Examples:
/// ```
/// match parse_into_value("32.3") {
///     Value::Float(f) => println!("value is float: {}", f),
///     _ => panic!("it's broke yo"),
/// }
///
/// match parse_into_value("something silly") {
///     Value::String(s) => println!("none of the above: {}", s),
///     _ => panic!("it's really broke yo")
/// }
/// ```
pub fn parse_into_value(into: String) -> Value {
    match into.parse::<bool>() {
        Ok(b) => return Value::Bool(b),
        Err(_) => {},
    }

    match into.parse::<i64>() {
        Ok(i) => return Value::Integer(i),
        Err(_) => {},
    }

    match into.parse::<f64>() {
        Ok(f) => return Value::Float(f),
        Err(_) => {},
    }

    Value::String(into)
}

#[derive(Debug, PartialEq, Clone)]
/// Wrapper type for possible types in nccl configuration.
pub enum Value {
    String(String),
    Bool(bool),
    Integer(i64),
    Float(f64),
}

impl Value {
    fn into_string(self) -> Result<String, ()> {
        match self {
            Value::String(s) => Ok(s),
            _ => Err(())
        }
    }

    fn into_bool(self) -> Result<bool, ()> {
        match self {
            Value::Bool(b) => Ok(b),
            _ => Err(())
        }
    }

    fn into_integer(self) -> Result<i64, ()> {
        match self {
            Value::Integer(i) => Ok(i),
            _ => Err(())
        }
    }

    fn into_float(self) -> Result<f64, ()> {
        match self {
            Value::Float(f) => Ok(f),
            _ => Err(())
        }
    }
}

impl TryInto<String> for Value {
    type Error = ();
    fn try_into(self) -> Result<String, Self::Error> {
        self.into_string()
    }
}

impl TryInto<bool> for Value {
    type Error = ();
    fn try_into(self) -> Result<bool, Self::Error> {
        self.into_bool()
    }
}

impl TryInto<i64> for Value {
    type Error = ();
    fn try_into(self) -> Result<i64, Self::Error> {
        self.into_integer()
    }
}

impl TryInto<f64> for Value {
    type Error = ();
    fn try_into(self) -> Result<f64, Self::Error> {
        self.into_float()
    }
}

impl<'a> From<&'a Value> for Value {
    fn from(v: &'a Value) -> Self {
        v.clone()
    }
}

impl From<String> for Value {
    fn from(s: String) -> Self {
        Value::String(s)
    }
}

impl<'a> From<&'a String> for Value {
    fn from(s: &'a String) -> Self {
        Value::String(s.to_owned())
    }
}

impl<'a> From<&'a str> for Value {
    fn from(s: &'a str) -> Self {
        Value::String(s.to_owned())
    }
}

impl From<bool> for Value {
    fn from(b: bool) -> Self {
        Value::Bool(b)
    }
}

impl From<i64> for Value {
    fn from(i: i64) -> Self {
        Value::Integer(i)
    }
}

impl From<f64> for Value {
    fn from(f: f64) -> Self {
        Value::Float(f)
    }
}

impl Into<String> for Value {
    fn into(self) -> String {
        self.into_string().unwrap()
    }
}

impl Into<bool> for Value {
    fn into(self) -> bool {
        self.into_bool().unwrap()
    }
}

impl Into<i64> for Value {
    fn into(self) -> i64 {
        self.into_integer().unwrap()
    }
}

impl Into<f64> for Value {
    fn into(self) -> f64 {
        self.into_float().unwrap()
    }
}

impl fmt::Display for Value {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            &Value::Bool(b) => write!(f, "{}", b),
            &Value::String(ref s) => write!(f, "{}", s),
            &Value::Float(fl) => write!(f, "{}", fl),
            &Value::Integer(i) => write!(f, "{}", i),
        }
    }
}