Struct ParseError 

pub struct ParseError {
    pub message: String,
    pub offset: Option<usize>,
    pub line: Option<u32>,
    pub column: Option<usize>,
    pub length: Option<usize>,
    pub severity: Option<DiagnosticSeverity>,
    pub code: Option<String>,
    pub expected: Option<String>,
    pub found: Option<String>,
    pub suggestion: Option<String>,
    pub category: Option<DiagnosticCategory>,
    pub is_cascade: Option<bool>,
}

Error returned when parsing fails.

Fields

message: String

Human-readable description of the error.

offset: Option<usize>

Optional byte offset in the input where the error occurred.

line: Option<u32>

Optional line number (1-based).

column: Option<usize>

Optional column (1-based).

length: Option<usize>

Optional length of the error span in bytes (for LSP range end).

severity: Option<DiagnosticSeverity>

Severity (defaults to Error when not set).

code: Option<String>

Optional code for quick fixes or documentation (e.g. “expected_keyword”).

expected: Option<String>

What was expected at this position (e.g. “‘;’ or ‘}’”, “‘package’ or ‘namespace’”).

found: Option<String>

Snippet of what was found at the error position (for display).

suggestion: Option<String>

Short hint on how to fix the error.

category: Option<DiagnosticCategory>

High-level diagnostic category used by clients to classify failures.

is_cascade: Option<bool>

When true, this diagnostic is likely a consequence of an earlier error in the same body.

Implementations

impl ParseError

pub fn new(message: impl Into<String>) -> Self

pub fn with_offset(self, offset: usize) -> Self

pub fn with_location(self, offset: usize, line: u32, column: usize) -> Self

Set offset, line, and column for error location.

pub fn with_length(self, length: usize) -> Self

pub fn with_severity(self, severity: DiagnosticSeverity) -> Self

pub fn with_code(self, code: impl Into<String>) -> Self

pub fn with_expected(self, expected: impl Into<String>) -> Self

pub fn with_found(self, found: impl Into<String>) -> Self

pub fn with_suggestion(self, suggestion: impl Into<String>) -> Self

pub fn with_category(self, category: DiagnosticCategory) -> Self

pub fn with_is_cascade(self, is_cascade: bool) -> Self

pub fn to_lsp_range(&self) -> Option<(u32, u32, u32, u32)>

LSP uses 0-based line and 0-based character. Returns (start_line, start_character, end_line, end_character). Returns None if position is unknown.

Trait Implementations

impl Clone for ParseError

fn clone(&self) -> ParseError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ParseError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ParseError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ParseError

impl Error for ParseError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for ParseError

fn eq(&self, other: &ParseError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ParseError