Enum LexerError

pub enum LexerError {
    UnexpectedSymbol {
        symbol: String,
        span: (u32, u32),
    },
    UnmatchedSymbol {
        symbol: char,
        position: u32,
    },
    UnexpectedEof {
        symbol: char,
        position: u32,
    },
}

词法分析错误类型 定义了在词法分析过程中可能遇到的各种错误情况

Variants

UnexpectedSymbol

意外的符号错误 当遇到无法识别的字符时触发

Fields

symbol: String

span: (u32, u32)

UnmatchedSymbol

不匹配的符号错误 当遇到语法不正确的字符时触发（如单独的括号等）

Fields

symbol: char

position: u32

UnexpectedEof

意外的文件结束错误 当在需要更多字符时文件已结束时触发（如未关闭的字符串等）

Fields

symbol: char

position: u32

Trait Implementations

impl Clone for LexerError

fn clone(&self) -> LexerError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LexerError

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

Formats the value using the given formatter.

impl Display for LexerError

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

Formats the value using the given formatter.

impl Error for LexerError

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 From<LexerError> for IsolateError

fn from(source: LexerError) -> Self

Converts to this type from the input type.

impl PartialEq for LexerError

fn eq(&self, other: &LexerError) -> 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 Eq for LexerError

impl StructuralPartialEq for LexerError