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use std::fmt;
use std::path::PathBuf;
use crate::vm::{Op, Value};
#[derive(Debug)]
pub enum ErrorKind {
TypeError(Op, Vec<Value>),
AssertFailed(Value, Value),
SyntaxError(usize),
}
#[derive(Debug)]
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, values) => {
let values = values
.iter()
.fold(String::new(), |a, v| { format!("{}, {:?}", a, v) });
write!(f, "Cannot apply {:?} to values {}", op, values)
}
ErrorKind::AssertFailed(a, b) => {
write!(f, "Assertion failed, {:?} != {:?}.", a, b)
}
ErrorKind::SyntaxError(line) => {
write!(f, "Syntax error on line {}", line)
}
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let message = match &self.message {
Some(s) => format!("\n{}", s),
None => String::from(""),
};
write!(f, "{:?}:{} [Runtime Error] {}{}", self.file, self.line, self.kind, message)
}
}
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