Struct erl_tokenize::tokens::FloatToken

pub struct FloatToken { /* fields omitted */ }

Floating point number token.

Examples

use erl_tokenize::Position;
use erl_tokenize::tokens::FloatToken;

let pos = Position::new();

// Ok
assert_eq!(FloatToken::from_text("0.1", pos.clone()).unwrap().value(), 0.1);
assert_eq!(FloatToken::from_text("12.3e-1  ", pos.clone()).unwrap().value(), 1.23);

// Err
assert!(FloatToken::from_text("123", pos.clone()).is_err());
assert!(FloatToken::from_text(".123", pos.clone()).is_err());
assert!(FloatToken::from_text("1.", pos.clone()).is_err());

Methods

impl FloatToken

pub fn from_value(value: f64, pos: Position) -> Self

Makes a new FloatToken instance from the value.

Examples

use erl_tokenize::Position;
use erl_tokenize::tokens::FloatToken;

let pos = Position::new();
assert_eq!(FloatToken::from_value(1.23, pos.clone()).text(), "1.23");

pub fn from_text(text: &str, pos: Position) -> Result<Self>

Tries to convert from any prefixes of the text to a FloatToken.

pub fn value(&self) -> f64

Returns the value of this token.

Examples

use erl_tokenize::Position;
use erl_tokenize::tokens::FloatToken;

let pos = Position::new();

assert_eq!(FloatToken::from_text("0.1", pos.clone()).unwrap().value(), 0.1);
assert_eq!(FloatToken::from_text("12.3e-1", pos.clone()).unwrap().value(), 1.23);

pub fn text(&self) -> &str

Returns the original textual representation of this token.

Examples

use erl_tokenize::Position;
use erl_tokenize::tokens::FloatToken;

let pos = Position::new();

assert_eq!(FloatToken::from_text("0.1", pos.clone()).unwrap().text(), "0.1");
assert_eq!(FloatToken::from_text("12.3e-1", pos.clone()).unwrap().text(), "12.3e-1");

Trait Implementations

impl PositionRange for FloatToken

fn start_position(&self) -> Position

Returns the (inclusive) start position of this.

fn end_position(&self) -> Position

Returns the (exclusive) end position of this.

impl From<FloatToken> for LexicalToken

fn from(f: FloatToken) -> Self

Performs the conversion.

impl From<FloatToken> for Token

fn from(f: FloatToken) -> Self

Performs the conversion.

impl Clone for FloatToken

fn clone(&self) -> FloatToken

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FloatToken

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

Formats the value using the given formatter.

impl Display for FloatToken

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

Formats the value using the given formatter.