[][src]Struct bnf::Expression

pub struct Expression { /* fields omitted */ }

An Expression is comprised of any number of Terms

Implementations

impl Expression[src]

pub fn new() -> Expression[src]

Construct a new Expression

pub fn from_parts(v: Vec<Term>) -> Expression[src]

Construct an Expression from Terms

pub fn add_term(&mut self, term: Term)[src]

Add Term to Expression

pub fn remove_term(&mut self, term: &Term) -> Option<Term>[src]

Remove Term from Expression

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

Example

extern crate bnf;
use bnf::{Expression, Term};

fn main() {
    let mut expression = Expression::from_parts(vec![]);
    let to_remove = Term::Terminal(String::from("a_terminal"));
    let removed = expression.remove_term(&to_remove);
    match removed {
        Some(term) => println!("removed {}", term),
        None => println!("term was not in expression, so could not be removed"),
    }

}

pub fn terms_iter(&self) -> Iter<'_>[src]

Get iterator of Terms within Expression

pub fn terms_iter_mut(&mut self) -> IterMut<'_>[src]

Get mutable iterator of Terms within Expression

Trait Implementations

impl Clone for Expression[src]

impl Debug for Expression[src]

impl Default for Expression[src]

impl<'de> Deserialize<'de> for Expression[src]

impl Display for Expression[src]

impl Eq for Expression[src]

impl FromStr for Expression[src]

type Err = Error

The associated error which can be returned from parsing.

impl Hash for Expression[src]

impl PartialEq<Expression> for Expression[src]

impl Serialize for Expression[src]

impl StructuralEq for Expression[src]

impl StructuralPartialEq for Expression[src]

Auto Trait Implementations

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impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> Conv for T

impl<T> Conv for T

impl<T> DeserializeOwned for T where
    T: for<'de> Deserialize<'de>, 
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impl<T> FmtForward for T

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> Pipe for T where
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impl<T> Pipe for T

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impl<T> Tap for T

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    T: Clone
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type Owned = T

The resulting type after obtaining ownership.

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    T: Display + ?Sized
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impl<T> TryConv for T

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impl<T, U> TryFrom<U> for T where
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,