Struct Cursor

pub struct Cursor<'a> {
    pub err: &'a Option<ExprValidationError>,
    pub txt: &'a str,
    pub noderef: NodeRef,
    pub auto: Option<String>,
    /* private fields */
}

A tokenizer cursor for ExprTK parsing.

Because ExprTK reports errors in column/row coordinates and visually needs to be applied to an entire token rather than a single character, we need fairly obnoxious counter logic to figure out how to generate the resulting syntax-highlighted HTML. The Counter<'a> struct encpsulates this logic, generating a NodeRef to any autocomplete-able <span> tokens, as well as other convenient data for HTML rendering, and can be called incrementally while iterating tokens after parsing.

Fields

err: &'a Option<ExprValidationError>

txt: &'a str

noderef: NodeRef

auto: Option<String>

Implementations

impl<'a> Cursor<'a>

pub fn new(err: &'a Option<ExprValidationError>) -> Self

pub const fn is_error(&self) -> bool

Is the cursor currently overlapping a token with an error?

pub const fn is_autocomplete(&self, position: u32) -> bool

Is the cursor currently overlapping an autocomplete-able token?

pub fn map_rows<T, F: Fn(u32) -> T>(self, f: F) -> impl Iterator<Item = T>

TODO this is alot of type backage for what could just be num_rows().

pub fn increment_column(&mut self, size: u32)

Increment the counter column by size characters.

pub fn increment_line(&mut self)

Increment to the next line, typewriter-style.