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
|
use std::fmt;
use std::fs::File;
use std::io::{self, BufRead};
use std::path::PathBuf;
use owo_colors::OwoColorize;
use crate::{Op, Value};
use crate::Type;
use crate::tokenizer::Token;
#[derive(Debug, Clone)]
pub enum ErrorKind {
TypeError(Op, Vec<Type>),
/// (External function, parameters)
ExternTypeMismatch(String, Vec<Type>),
ValueError(Op, Vec<Value>),
/// (Indexed value, length, index)
IndexOutOfBounds(Value, usize, usize),
/// Sanity checking errors
AssertFailed,
InvalidProgram,
Unreachable,
/// (line, token)
SyntaxError(usize, Token),
}
#[derive(Debug, Clone)]
pub struct Error {
pub kind: ErrorKind,
pub file: PathBuf,
pub line: usize,
pub message: Option<String>,
}
impl fmt::Display for ErrorKind {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
ErrorKind::TypeError(op, types) => {
let types = types
.iter()
.fold(String::new(), |a, v| { format!("{}{:?}, ", a, v) });
write!(f, "{} Cannot apply {:?} to types {}", "Type Error".bold(), op, types)
}
ErrorKind::IndexOutOfBounds(value, len, slot) => {
write!(f, "{} for {:?} - length is {} but index is {}", "Index Error".bold(), value, len, slot)
}
ErrorKind::ExternTypeMismatch(name, types) => {
write!(f, "{} Extern function '{}' doesn't accept argument(s) with type(s) {:?}", "Type Error".bold(), name, types)
}
ErrorKind::ValueError(op, values) => {
let values = values
.iter()
.fold(String::new(), |a, v| { format!("{}{:?}, ", a, v) });
write!(f, "{} Cannot apply {:?} to values {}", "Value Error".bold(), op, values)
}
ErrorKind::AssertFailed => {
write!(f, "{}", "Assertion failed".bold())
}
ErrorKind::SyntaxError(line, token) => {
write!(f, "{} on line {} at token {:?}", "Syntax Error".bold(), line, token)
}
ErrorKind::Unreachable => {
write!(f, "{}", "Unreachable".bold())
}
ErrorKind::InvalidProgram => {
write!(f, "{}", "[!!] Invalid program [!!]".bold())
}
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let message = match &self.message {
Some(s) => format!("\n{} {}", ">>>".red(), s),
None => String::from(""),
};
let line = if let Ok(file) = File::open(&self.file) {
io::BufReader::new(file).lines().enumerate()
.filter(|(n, _)| self.line <= *n + 3 && *n + 3 <= self.line + 2)
.fold(String::from("\n"), |a, (n, l)| format!("{} {:3} | {}\n", a, (n + 1).blue(), l.unwrap()))
} else {
String::new()
};
write!(f, "\n<{}> {}:{} {}{}{}\n", "ERR".red(), self.file.display().blue(), self.line.blue(), self.kind, message, line)
}
}
|
