Enum SigParseError 

pub enum SigParseError {
    Syntax(String),
    Duplicate(String),
}

Why an arglist / type-parameter list failed to parse. The two variants carry sphinx’s two observable failure channels ([PY §1.3 step 5], _object.py:355-381):

• SigParseError::Syntax — ast.parse SyntaxError: task 6 logs at debug level (invisible) and falls back to pseudo_parse_arglist; for a tp-list, any failure is a warning (_object.py:342-345).
• SigParseError::Duplicate — inspect.Signature’s ValueError('duplicate parameter name: ...'): task 6 emits WARNING could not parse arglist (%r): %s and falls back to pseudo. Note ast.parse accepts duplicate def parameters (the check lives in the symtable pass), so this genuinely reaches Signature.__init__.

Variants

Syntax(String)

A SyntaxError-equivalent; the message approximates CPython’s and is only ever surfaced on the (warning) tp-list path.

Duplicate(String)

Duplicate parameter name (the payload is the offending name).

Trait Implementations

impl Clone for SigParseError

fn clone(&self) -> SigParseError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SigParseError

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

Formats the value using the given formatter.

impl Display for SigParseError

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

Formats the value using the given formatter.

impl Eq for SigParseError

impl Error for SigParseError

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 SigParseError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SigParseError