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

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::fmt;

/// Unary operators
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum UnaryOperator {
    Plus,
    Minus,
    Not,
}

impl fmt::Display for UnaryOperator {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(match self {
            UnaryOperator::Plus => "+",
            UnaryOperator::Minus => "-",
            UnaryOperator::Not => "NOT",
        })
    }
}

/// Binary operators
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum BinaryOperator {
    Plus,
    Minus,
    Multiply,
    Divide,
    Modulus,
    Gt,
    Lt,
    GtEq,
    LtEq,
    Eq,
    NotEq,
    And,
    Or,
    Like,
    NotLike,
}

impl fmt::Display for BinaryOperator {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(match self {
            BinaryOperator::Plus => "+",
            BinaryOperator::Minus => "-",
            BinaryOperator::Multiply => "*",
            BinaryOperator::Divide => "/",
            BinaryOperator::Modulus => "%",
            BinaryOperator::Gt => ">",
            BinaryOperator::Lt => "<",
            BinaryOperator::GtEq => ">=",
            BinaryOperator::LtEq => "<=",
            BinaryOperator::Eq => "=",
            BinaryOperator::NotEq => "<>",
            BinaryOperator::And => "AND",
            BinaryOperator::Or => "OR",
            BinaryOperator::Like => "LIKE",
            BinaryOperator::NotLike => "NOT LIKE",
        })
    }
}