Struct UserFunc 

pub struct UserFunc { /* private fields */ }

User-defined function.

Implementations

impl UserFunc

pub fn new(bindings: Vec<String>, body: Expr) -> UserFunc

Create a new function with parameters bindings (in order) and body expression body.

pub fn apply(&self, args: &[Number], ctx: &Context) -> CalcResult

Call the function on args in ctx.

pub fn arity(&self) -> usize

Return the number of arguments the function takes.

Trait Implementations

impl Clone for UserFunc

fn clone(&self) -> UserFunc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UserFunc

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UserFunc

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for UserFunc

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.