Enum prolog_parser::ast::Constant

pub enum Constant {
    Atom(ClauseName),
    Char(char),
    Number(Number),
    String(StringList),
    Usize(usize),
    EmptyList,
}

Variants

Atom(ClauseName)Char(char)Number(Number)String(StringList)Usize(usize)EmptyList

Methods

impl Constant

pub fn to_atom(self) -> Option<ClauseName>

pub fn to_integer(self) -> Option<Rc<BigInt>>

Trait Implementations

impl Clone for Constant

fn clone(&self) -> Constant

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Hash for Constant

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl Display for Constant

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

Formats the value using the given formatter.

impl PartialEq for Constant

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Eq for Constant