lunatic 0.14.1

Helper library for building Rust applications that run on lunatic.
Documentation 
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

use lunatic_sqlite_api::wire_format::{BindValue, SqliteValue};
use serde::{Deserialize, Serialize};

/// Sqlite value for binding in queries.
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum Value {
    Null,
    Blob(Vec<u8>),
    Text(String),
    Double(f64),
    Int(i32),
    Int64(i64),
}

macro_rules! impl_into_value {
    ($into_fn: ident, $as_fn: ident, Null, $t: ty) => {
        impl Value {
            pub fn $into_fn(self) -> Option<$t> {
                match self {
                    Value::Null => Some(()),
                    _ => None,
                }
            }

            pub fn $as_fn(&self) -> Option<&$t> {
                match self {
                    Value::Null => Some(&()),
                    _ => None,
                }
            }
        }
    };
    ($into_fn: ident, $as_fn: ident, $v: ident, $t: ty) => {
        impl Value {
            pub fn $into_fn(self) -> Option<$t> {
                match self {
                    Value::$v(v) => Some(v),
                    _ => None,
                }
            }

            pub fn $as_fn(&self) -> Option<&$t> {
                match self {
                    Value::$v(v) => Some(v),
                    _ => None,
                }
            }
        }
    };
}

impl_into_value!(into_null, as_null, Null, ());
impl_into_value!(into_blob, as_blob, Blob, Vec<u8>);
impl_into_value!(into_text, as_text, Text, String);
impl_into_value!(into_double, as_double, Double, f64);
impl_into_value!(into_int, as_int, Int, i32);
impl_into_value!(into_int64, as_int64, Int64, i64);

impl Value {
    pub fn as_int_any(&self) -> Option<i64> {
        match self {
            Value::Int(v) => Some(*v as i64),
            Value::Int64(v) => Some(*v),
            _ => None,
        }
    }
}

macro_rules! impl_from_type {
    ($t: ty, $v: ident) => {
        impl From<$t> for Value {
            fn from(value: $t) -> Self {
                Value::$v(value)
            }
        }
    };
}

impl_from_type!(Vec<u8>, Blob);
impl_from_type!(String, Text);
impl_from_type!(f64, Double);
impl_from_type!(i32, Int);
impl_from_type!(i64, Int64);

impl From<()> for Value {
    fn from(_value: ()) -> Self {
        Value::Null
    }
}

impl From<&[u8]> for Value {
    fn from(value: &[u8]) -> Self {
        value.to_vec().into()
    }
}

impl From<&str> for Value {
    fn from(value: &str) -> Self {
        value.to_string().into()
    }
}

impl From<&String> for Value {
    fn from(value: &String) -> Self {
        value.as_str().into()
    }
}

impl From<f32> for Value {
    fn from(value: f32) -> Self {
        Value::Double(value as f64)
    }
}

impl<T> From<Option<T>> for Value
where
    T: Into<Value>,
{
    fn from(value: Option<T>) -> Self {
        value.map(|v| v.into()).unwrap_or(Value::Null)
    }
}

impl From<Value> for BindValue {
    fn from(value: Value) -> Self {
        match value {
            Value::Null => BindValue::Null,
            Value::Blob(v) => BindValue::Blob(v),
            Value::Text(v) => BindValue::Text(v),
            Value::Double(v) => BindValue::Double(v),
            Value::Int(v) => BindValue::Int(v),
            Value::Int64(v) => BindValue::Int64(v),
        }
    }
}

impl From<SqliteValue> for Value {
    fn from(value: SqliteValue) -> Self {
        match value {
            SqliteValue::Null => Value::Null,
            SqliteValue::Blob(v) => Value::Blob(v),
            SqliteValue::Text(v) => Value::Text(v),
            SqliteValue::Double(v) => Value::Double(v),
            SqliteValue::Integer(v) => Value::Int64(v),
            SqliteValue::I64(v) => Value::Int64(v),
        }
    }
}