Struct bnf::Production

pub struct Production {
    pub lhs: Term,
    /* private fields */
}

A Production is comprised of any number of Expressions

Fields

lhs: Term

The “left hand side” of the production, i.e. “lhs -> rhs …”

Implementations

impl Production

pub fn new() -> Production

Construct a new Production

pub fn from_parts(t: Term, e: Vec<Expression>) -> Production

Construct an Production from Expressions

pub fn add_to_rhs(&mut self, expr: Expression)

Add Expression to the Production’s right hand side

pub fn remove_from_rhs(&mut self, expr: &Expression) -> Option<Expression>

Remove Expression from the Production’s right hand side

If interested if Expression was removed, then inspect the returned Option.

pub fn rhs_iter(&self) -> impl Iterator<Item = &Expression>

Get iterator of the Production’s right hand side Expressions

pub fn rhs_iter_mut(&mut self) -> impl Iterator<Item = &mut Expression>

Get mutable iterator of the Production’s right hand side Expressions

pub fn len(&self) -> usize

Get number of right hand side Expressions

pub fn is_empty(&self) -> bool

If the production is empty of Expressions

Trait Implementations

impl Clone for Production

fn clone(&self) -> Production

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Production

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

Formats the value using the given formatter.

impl Default for Production

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Production

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Production

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

Formats the value using the given formatter.

impl FromStr for Production

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Production

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<Production> for Production

fn eq(&self, other: &Production) -> 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 !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Production

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

Serialize this value into the given Serde serializer.

impl Eq for Production

impl StructuralEq for Production

impl StructuralPartialEq for Production