Struct Position

pub struct Position {
    pub line: u32,
    pub column: u32,
}

Position (line & column) in the source input.

Fields

line: u32

Line count

column: u32

Column count

Implementations

impl Position

pub const fn starting() -> Self

Starting position (line = 1, column = 1).

pub fn update_from_char(&mut self, ch: char) -> Self

Updates the position. If ch == ‘\n’, increases line count and resets column count, otherwise just increases column count.

Example

use simple_tokenizer::Position;

let mut pos = Position::starting();

assert_eq!(pos.update_from_char(' '), Position { line: 1, column: 2 });
assert_eq!(pos.update_from_char('\n'), Position { line: 2, column: 1 });

pub fn update_from_str(&mut self, s: &str) -> Self

Updates the position. Identical to calling update_from_char() for every character of the string.

Example

use simple_tokenizer::Position;

let mut pos = Position::starting();

assert_eq!(pos.update_from_str("line 1\nline 2\nlong line 3"), Position { line: 3, column: 12 });
assert_eq!(pos.update_from_str(""), Position { line: 3, column: 12 });
assert_eq!(pos.update_from_str("continuation"), Position { line: 3, column: 24 });

Trait Implementations

impl Clone for Position

fn clone(&self) -> Position

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Position

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

Formats the value using the given formatter.

impl Display for Position

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

Formats the value using the given formatter.

impl PartialEq for Position

fn eq(&self, other: &Position) -> 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 Copy for Position

impl Eq for Position

impl StructuralPartialEq for Position