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
//! Submodule defining the error enumeration which might occur when working
//! with molecular formula.
use crate::Bracket;
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, thiserror::Error)]
/// Errors associated with numeric operations.
pub enum NumericError {
/// Leading zero not allowed in counts.
#[error("Leading zero not allowed in counts.")]
LeadingZero,
/// A positive overflow occurred during a numeric operation.
#[error("Positive overflow occurred during numeric operation.")]
PositiveOverflow,
/// A negative overflow occurred during a numeric operation.
#[error("Negative overflow occurred during numeric operation.")]
NegativeOverflow,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, thiserror::Error)]
/// Errors associated with formula count operations.
pub enum CountError {
/// An error regarding numeric operations occurred.
#[error("Numeric error: {0}")]
Numeric(#[from] NumericError),
/// The formula contains an extension whose element counts cannot be
/// determined.
#[error("Cannot determine element counts for an extension node.")]
UncountableExtension,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, thiserror::Error)]
/// Error enumeration when parsing a molecular formula.
pub enum ParserError {
/// Unexpected end of input reached while parsing tokens.
#[error("Unexpected end of input while parsing tokens.")]
UnexpectedEndOfInput,
/// An error regarding numeric parsing or operations occurred.
#[error("Numeric error: {0}")]
Numeric(#[from] NumericError),
/// A provided character is not allowed in the current molecular formula
/// tree.
#[error("Character '{0}' is not allowed in the current molecular formula tree.")]
UnexpectedCharacter(char),
/// The formula is not compliant with the Hill system ordering.
#[error("The formula is not compliant with the Hill system ordering.")]
NotHillOrdered,
/// An error encountered from the elements-rs crate.
#[error("Element error: {0}")]
Element(#[from] elements_rs::errors::Error),
/// A superscripted number could not be processed neither as a charge nor
/// as an isotopic number.
#[error("A number could not be processed neither as a charge nor as an isotopic number.")]
UnprocessableNumber,
/// A closing bracket was expected but not found.
#[error("A closing bracket '{}' was expected but not found.", .0.closing())]
MissingClosingBracket(Bracket),
/// The molecular tree is empty.
#[error("The molecular tree is empty.")]
EmptyMolecularTree,
}