Struct FunctionSignature 

pub struct FunctionSignature {
    pub min_arity: usize,
    pub max_arity: Option<usize>,
}

Function signature metadata used by semantic validation.

Fields

min_arity: usize

Minimum number of positional arguments.

max_arity: Option<usize>

Maximum number of positional arguments. None means unbounded/variadic.

Implementations

impl FunctionSignature

pub const fn exact(arity: usize) -> Self

Build an exact-arity signature.

pub const fn range(min_arity: usize, max_arity: usize) -> Self

Build a bounded arity range signature.

pub const fn variadic(min_arity: usize) -> Self

Build a variadic signature with a minimum arity.

pub fn matches_arity(&self, arity: usize) -> bool

Whether an observed arity matches this signature.

pub fn describe_arity(&self) -> String

Render a human-readable arity descriptor.

Trait Implementations

impl Clone for FunctionSignature

fn clone(&self) -> FunctionSignature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionSignature

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

Formats the value using the given formatter.

impl PartialEq for FunctionSignature

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

impl StructuralPartialEq for FunctionSignature