rust_roll/notation/
error.rs

1//! Errors from parsing or constructing dice notation.
2
3use std::num::ParseIntError;
4use thiserror::Error;
5
6/// An error from parsing or constructing dice notation.
7#[derive(Debug, Error, PartialEq)]
8#[non_exhaustive]
9pub enum NotationError {
10    /// The input doesn't match the `XdY?Z` notation format.
11    #[error("invalid dice notation; expected something like 2d6+3")]
12    InvalidFormat,
13
14    /// A number in the input couldn't be parsed, usually because it's
15    /// too large for a `u32`.
16    #[error("invalid number: {0}")]
17    InvalidNumber(#[from] ParseIntError),
18
19    /// A value that must be positive was zero. Holds the name of the
20    /// value: `"count"`, `"sides"` or `"divisor"`.
21    #[error("{0} must be greater than zero")]
22    Zero(&'static str),
23
24    /// The operator isn't one of `+`, `-`, `*` or `/`.
25    #[error("invalid operator; expected one of +, -, /, *")]
26    InvalidOperator,
27
28    /// A value exceeded the maximum. Holds the maximum,
29    /// [`MAX_VALUE`](crate::notation::MAX_VALUE).
30    #[error("number too large; maximum is {0}")]
31    NumberTooLarge(u32),
32}
rust_roll/notation/error.rs

rust_roll/notation/
error.rs
