brush_parser/
error.rs

1use crate::tokenizer;
2use crate::Token;
3
4/// Represents an error that occurred while parsing tokens.
5#[derive(thiserror::Error, Debug)]
6pub enum ParseError {
7    /// A parsing error occurred near the given token.
8    #[error("parse error near token: {}", .0.location().start)]
9    ParsingNearToken(Token),
10
11    /// A parsing error occurred at the end of the input.
12    #[error("parse error at end of input")]
13    ParsingAtEndOfInput,
14
15    /// An error occurred while tokenizing the input stream.
16    #[error("failed to tokenize input")]
17    Tokenizing {
18        /// The inner error.
19        inner: tokenizer::TokenizerError,
20        /// Optionally provides the position of the error.
21        position: Option<tokenizer::SourcePosition>,
22    },
23}
24
25/// Represents an error that occurred while parsing a word.
26#[derive(Debug, thiserror::Error)]
27pub enum WordParseError {
28    /// An error occurred while parsing an arithmetic expression.
29    #[error("failed to parse arithmetic expression")]
30    ArithmeticExpression(peg::error::ParseError<peg::str::LineCol>),
31
32    /// An error occurred while parsing a shell pattern.
33    #[error("failed to parse pattern")]
34    Pattern(peg::error::ParseError<peg::str::LineCol>),
35
36    /// An error occurred while parsing a prompt string.
37    #[error("failed to parse prompt string")]
38    Prompt(peg::error::ParseError<peg::str::LineCol>),
39
40    /// An error occurred while parsing a parameter.
41    #[error("failed to parse parameter '{0}'")]
42    Parameter(String, peg::error::ParseError<peg::str::LineCol>),
43
44    /// An error occurred while parsing for brace expansion.
45    #[error("failed to parse for brace expansion: '{0}'")]
46    BraceExpansion(String, peg::error::ParseError<peg::str::LineCol>),
47
48    /// An error occurred while parsing a word.
49    #[error("failed to parse word '{0}'")]
50    Word(String, peg::error::ParseError<peg::str::LineCol>),
51}
52
53/// Represents an error that occurred while parsing a (non-extended) test command.
54#[derive(Debug, thiserror::Error)]
55pub enum TestCommandParseError {
56    /// An error occurred while parsing a test command.
57    #[error("failed to parse test command")]
58    TestCommand(peg::error::ParseError<usize>),
59}
60
61pub(crate) fn convert_peg_parse_error(
62    err: peg::error::ParseError<usize>,
63    tokens: &[Token],
64) -> ParseError {
65    let approx_token_index = err.location;
66
67    if approx_token_index < tokens.len() {
68        ParseError::ParsingNearToken(tokens[approx_token_index].clone())
69    } else {
70        ParseError::ParsingAtEndOfInput
71    }
72}
brush_parser/error.rs

brush_parser/
error.rs
