pub struct Position<'i> { /* private fields */ }
Expand description

A cursor position in a &str which provides useful methods to manually parse that string.

Implementations

Attempts to create a new Position at the given position. If the specified position is an invalid index, or the specified position is not a valid UTF8 boundary, then None is returned.

Examples
let cheart = '💖';
let heart = "💖";
assert_eq!(Position::new(heart, 1), None);
assert_ne!(Position::new(heart, cheart.len_utf8()), None);

Creates a Position at the start of a &str.

Examples
let start = Position::from_start("");
assert_eq!(start.pos(), 0);

Returns the byte position of this Position as a usize.

Examples
let input = "ab";
let mut start = Position::from_start(input);

assert_eq!(start.pos(), 0);

Creates a Span from two Positions.

Panics

Panics if the positions come from different inputs.

Examples
let input = "ab";
let start = Position::from_start(input);
let span = start.span(&start.clone());

assert_eq!(span.start(), 0);
assert_eq!(span.end(), 0);

Returns the line and column number of this Position.

Examples
enum Rule {}

let input = "\na";
let mut state: Box<pest::ParserState<Rule>> = pest::ParserState::new(input);
let mut result = state.match_string("\na");
assert!(result.is_ok());
assert_eq!(result.unwrap().position().line_col(), (2, 2));

Returns the entire line of the input that contains this Position.

Examples
enum Rule {}

let input = "\na";
let mut state: Box<pest::ParserState<Rule>> = pest::ParserState::new(input);
let mut result = state.match_string("\na");
assert!(result.is_ok());
assert_eq!(result.unwrap().position().line_of(), "a");

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.