Enum Func

pub enum Func {
    User(UserCall),
    Builtin(BuiltinCall),
}

An identifier for a function call to a UserCall or BuiltinCall.

Variants

User(UserCall)

A call to a user-defined function.

Builtin(BuiltinCall)

A call to a builtin function.

Implementations

impl Func

pub fn arity(&self) -> usize

Returns the number of arguments in the function signature.

pub fn check_call(&self, call: &Call) -> Result<(), Error>

Checks if this function call matches the signature of its target function in argmuent count.

Returns Ok if the call matches the signature, or Err otherwise.

pub fn num_defaults_used(&self) -> Option<usize>

Returns the number of default arguments being used in the call.

Returns None if the function call has more arguments than the signature, which shuold cause a compilation error.

Trait Implementations

impl Clone for Func

fn clone(&self) -> Func

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Func

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

Formats the value using the given formatter.

impl PartialEq for Func

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

impl StructuralPartialEq for Func