Struct syntex_syntax::parse::lexer::StringReader

pub struct StringReader<'a> {
    pub span_diagnostic: &'a SpanHandler,
    pub pos: BytePos,
    pub last_pos: BytePos,
    pub col: CharPos,
    pub curr: Option<char>,
    pub filemap: Rc<FileMap>,
    pub peek_tok: Token,
    pub peek_span: Span,
    // some fields omitted
}

Fields

span_diagnostic
pos	The absolute offset within the codemap of the next character to read
last_pos	The absolute offset within the codemap of the last character read(curr)
col	The column of the next character to read
curr	The last character to be read
filemap
peek_tok
peek_span

Methods

impl<'a> StringReader<'a>

fn new_raw<'b>(span_diagnostic: &'b SpanHandler, filemap: Rc<FileMap>) -> StringReader<'b>

For comments.rs, which hackily pokes into pos and curr

fn new<'b>(span_diagnostic: &'b SpanHandler, filemap: Rc<FileMap>) -> StringReader<'b>

fn curr_is(&self, c: char) -> bool

fn fatal_span(&self, sp: Span, m: &str) -> FatalError

Report a fatal lexical error with a given span.

fn err_span(&self, sp: Span, m: &str)

Report a lexical error with a given span.

fn help_span(&self, sp: Span, m: &str)

Suggest some help with a given span.

fn with_str_from<T, F>(&self, start: BytePos, f: F) -> T where F: FnOnce(&str) -> T

Calls f with a string slice of the source text spanning from start up to but excluding self.last_pos, meaning the slice does not include the character self.curr.

fn name_from(&self, start: BytePos) -> Name

Create a Name from a given offset to the current offset, each adjusted 1 towards each other (assumes that on either side there is a single-byte delimiter).

fn name_from_to(&self, start: BytePos, end: BytePos) -> Name

As name_from, with an explicit endpoint.

fn bump(&mut self)

Advance the StringReader by one character. If a newline is discovered, add it to the FileMap's list of line start offsets.

fn nextch(&self) -> Option<char>

fn nextch_is(&self, c: char) -> bool

fn nextnextch(&self) -> Option<char>

fn nextnextch_is(&self, c: char) -> bool

Trait Implementations

impl<'a> Reader for StringReader<'a>

fn is_eof(&self) -> bool

fn next_token(&mut self) -> TokenAndSpan

Return the next token. EFFECT: advances the string_reader.

fn fatal(&self, m: &str) -> FatalError

Report a fatal error with the current span.

fn err(&self, m: &str)

Report a non-fatal error with the current span.

fn peek(&self) -> TokenAndSpan

fn real_token(&mut self) -> TokenAndSpan

Get a token the parser cares about.