Enum LangError 

pub enum LangError {
    Syntax {
        pos: usize,
        msg: String,
    },
    UnknownName(String),
    UnknownFunction(String),
    Type(String),
    TooComplex(String),
}

Errors from parsing or type-checking expressions.

Variants

Syntax

Lexical/syntax error.

Fields

pos: usize

Byte offset.

msg: String

Message.

UnknownName(String)

Unknown identifier.

UnknownFunction(String)

Unknown function.

Type(String)

Type or dimension mismatch.

TooComplex(String)

Expression too large or nested too deeply.

Trait Implementations

impl Clone for LangError

fn clone(&self) -> LangError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LangError

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

Formats the value using the given formatter.

impl Display for LangError

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

Formats the value using the given formatter.

impl Eq for LangError

impl Error for LangError

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 LangError

fn eq(&self, other: &LangError) -> 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 LangError