Struct Normal 

pub struct Normal<E = Expr> { /* private fields */ }

Wolfram Language “normal” expression: f[...].

A normal expression is any expression that consists of a head and zero or more arguments.

Implementations

impl Normal

pub fn new<E>(head: E, contents: Vec<Expr>) -> Normal

where E: Into<Expr>,

Construct a new normal expression from the head and elements.

pub fn head(&self) -> &Expr

The head of this normal expression.

pub fn elements(&self) -> &[Expr]

The elements of this normal expression.

If head conceptually represents a function, these are the arguments that are being applied to head.

Examples found in repository

examples/wstp.rs (line 183)

fn expr_string_join(link: &mut Link) {
    let expr = link.get_expr().unwrap();

    let list = expr.try_as_normal().unwrap();
    assert!(list.has_head(&Symbol::new("System`List")));

    let mut buffer = String::new();
    for elem in list.elements() {
        match elem.kind() {
            ExprKind::String(str) => buffer.push_str(str),
            _ => panic!("expected String argument, got: {:?}", elem),
        }
    }

    link.put_str(buffer.as_str()).unwrap()
}

pub fn into_elements(self) -> Vec<Expr>

The elements of this normal expression.

Use Normal::elements() to get a reference to this value.

pub fn has_head(&self, sym: &Symbol) -> bool

Returns true if the head of this expression is sym.

Examples found in repository

examples/wstp.rs (line 180)

fn expr_string_join(link: &mut Link) {
    let expr = link.get_expr().unwrap();

    let list = expr.try_as_normal().unwrap();
    assert!(list.has_head(&Symbol::new("System`List")));

    let mut buffer = String::new();
    for elem in list.elements() {
        match elem.kind() {
            ExprKind::String(str) => buffer.push_str(str),
            _ => panic!("expected String argument, got: {:?}", elem),
        }
    }

    link.put_str(buffer.as_str()).unwrap()
}

Trait Implementations

impl<E> Clone for Normal<E>

where E: Clone,

fn clone(&self) -> Normal<E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E> Debug for Normal<E>

where E: Debug,

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

Formats the value using the given formatter.

impl Display for Normal

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

Formats the value using the given formatter.

impl From<Normal> for Expr

fn from(normal: Normal) -> Expr

Converts to this type from the input type.

impl<E> Hash for Normal<E>

where E: Hash,

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<E> PartialEq for Normal<E>

where E: PartialEq,

fn eq(&self, other: &Normal<E>) -> 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<E> Eq for Normal<E>

where E: Eq,

impl<E> StructuralPartialEq for Normal<E>