Struct Nth 

pub struct Nth { /* private fields */ }

A parsed An+B expression: the coefficients of a·n + b.

Implementations

impl Nth

pub const fn new(a: i32, b: i32) -> Self

Construct an An+B expression from its coefficients directly.

pub const fn a(self) -> i32

The a coefficient (the step).

pub const fn b(self) -> i32

The b coefficient (the offset).

pub const fn matches(self, index: i32) -> bool

Whether the 1-based index matches this expression — that is, whether index == a·n + b for some non-negative integer n.

assert!(nth_check::parse("2n").unwrap().matches(4)); // an even position

Trait Implementations

impl Clone for Nth

fn clone(&self) -> Nth

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Nth

impl Debug for Nth

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

Formats the value using the given formatter.

impl Display for Nth

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

Formats the value using the given formatter.

impl Eq for Nth

impl FromStr for Nth

type Err = ParseError

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 Nth

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 for Nth

fn eq(&self, other: &Nth) -> 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 StructuralPartialEq for Nth