Struct tokenizer_lib::StreamedTokenChannel::StreamedTokenReader

pub struct StreamedTokenReader<T: PartialEq, TData> { /* fields omitted */ }

Trait Implementations

impl<T: PartialEq, TData> TokenReader<T, TData> for StreamedTokenReader<T, TData>

fn peek(&self) -> Option<&Token<T, TData>>

Returns reference to next token but does not advance iterator forward

fn next(&mut self) -> Option<Token<T, TData>>

Returns token and advances forward

fn scan(&self, cb: impl FnMut(&T) -> bool) -> Option<&Token<T, TData>>

Runs the closure over the upcoming tokens. Passes the value behind the Token to the closure. Will stop and return a reference to the next Token from when the closure returns true. Returns None if reader finishes before closure returns true. Does not advance the reader.

fn expect_next(
    &mut self,
    expected_type: T
) -> Result<TData, Option<(T, Token<T, TData>)>>

Tests that next token matches an expected type. Will return error if does not match. The ok value contains the data of the valid token. Else it will return the Err with the expected token type and the token that did not match