1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

use std::fmt;

#[derive(PartialEq, Eq, Debug, Clone)]
pub struct TypeMismatch {
    pub expected: String,
    pub found: String,
}

impl fmt::Display for TypeMismatch {
    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        write!(
            f,
            "Type mismatch. Expected {} but found {}.",
            self.expected, self.found
        )
    }
}

impl TypeMismatch {
    pub fn new(expected: String, found: String) -> TypeMismatch {
        TypeMismatch { expected, found }
    }
}