complexpr/src/lib.rs

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Rust
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2022-09-06 13:52:29 +00:00
use std::{rc::Rc, error::Error, fmt};
pub mod token;
pub mod expr;
pub mod lexer;
pub mod parser;
pub mod value;
pub mod eval;
pub mod interpreter;
#[derive(Clone, Debug)]
pub struct Position {
pub pos: usize,
pub line: usize,
pub col: usize,
pub file: Option<Rc<str>>
}
#[derive(Debug)]
pub struct ParserError {
pub message: String,
pub pos: Position
}
#[derive(Debug)]
pub struct RuntimeError {
pub message: String,
pub pos: Position
}
impl fmt::Display for ParserError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "Error: {}\n In {} at {},{}",
self.message,
self.pos.file.as_ref().map(|o| o.as_ref()).unwrap_or("<unknown>"),
self.pos.line,
self.pos.col
)
}
}
impl fmt::Display for RuntimeError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "Error: {}\n In {} at {},{}",
self.message,
self.pos.file.as_ref().map(|o| o.as_ref()).unwrap_or("<unknown>"),
self.pos.line,
self.pos.col
)
}
}
impl Error for ParserError {}
impl Error for RuntimeError {}