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
|
use std::str::FromStr;
#[derive(PartialEq, Debug, Clone, Copy)]
pub enum Op {
Add,
Sub,
Mul,
Div,
Modulo,
Equals,
Greater,
GrEqTo,
Less,
LsEqTo,
Define,
}
impl FromStr for Op {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"+" => Ok(Op::Add),
"-" => Ok(Op::Sub),
"*" => Ok(Op::Mul),
"/" => Ok(Op::Div),
"%" => Ok(Op::Modulo),
"=" => Ok(Op::Equals),
">" => Ok(Op::Greater),
">=" => Ok(Op::GrEqTo),
"<" => Ok(Op::Less),
"<=" => Ok(Op::LsEqTo),
"define" => Ok(Op::Define),
x => Err(format!("{} is not an operator", x))
}
}
}
#[derive(PartialEq, Debug, Clone)]
pub enum Number {
Int(isize),
Float(f32)
}
#[derive(PartialEq, Debug, Clone)]
pub enum Type {
Bool(bool),
Number(Number),
Str(String),
Symbol(String),
Operator(Op),
}
|
