Enum ParamKind 

pub enum ParamKind {
    Prototype,
    Void,
    Empty,
    Identifiers,
}

Which of the four shapes a function declarator’s parameter list has.

The distinction between ParamKind::Void and ParamKind::Empty is not pedantry. Before C23, int f() says nothing about the parameters and int f(void) says there are none; in C23 they mean the same thing. Projects moving to gnu23 hit exactly this, so the two are told apart here and diagnosed where it matters.

Variants

Prototype

A list of parameter declarations, named or abstract.

Void

(void).

Empty

().

Identifiers

A list of bare identifiers, which is an old-style definition’s parameter list.

Trait Implementations

impl Clone for ParamKind

fn clone(&self) -> ParamKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ParamKind

impl Debug for ParamKind

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

Formats the value using the given formatter.

impl Eq for ParamKind

impl PartialEq for ParamKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ParamKind