Struct bloguen::ops::ParagraphPasser

pub struct ParagraphPasser<'w> { /* fields omitted */ }

Output sink which will allow through the specified amount of HTML paragraphs, then void all remaining data.

The paragraph tags take the form of <p and </p>.

Examples

static INCOMING: &str = "
    <h1>Heading</h1>
    <p>Paragraph 1</p>
    <p>Paragraph <p>2 nested</p></p>
";


let mut buf = vec![];
ParagraphPasser::new(&mut buf, 0).write_all(INCOMING.as_bytes()).unwrap();
assert_eq!(String::from_utf8(buf).unwrap(), "
    <h1>Heading</h1>
    ");

let mut buf = vec![];
ParagraphPasser::new(&mut buf, 1).write_all(INCOMING.as_bytes()).unwrap();
assert_eq!(String::from_utf8(buf).unwrap(), "
    <h1>Heading</h1>
    <p>Paragraph 1</p>
    ");

let mut buf = vec![];
ParagraphPasser::new(&mut buf, 2).write_all(INCOMING.as_bytes()).unwrap();
assert_eq!(String::from_utf8(buf).unwrap(), "
    <h1>Heading</h1>
    <p>Paragraph 1</p>
    <p>Paragraph <p>2 nested</p></p>
");

let mut buf = vec![];
ParagraphPasser::new(&mut buf, 3).write_all(INCOMING.as_bytes()).unwrap();
assert_eq!(String::from_utf8(buf).unwrap(), "
    <h1>Heading</h1>
    <p>Paragraph 1</p>
    <p>Paragraph <p>2 nested</p></p>
");

Methods

impl<'w> ParagraphPasser<'w>

Important traits for ParagraphPasser<'w>

impl<'w> Write for ParagraphPasser<'w>

pub fn new(into: &'w mut dyn Write, count: usize) -> ParagraphPasser<'w>

Create a passer instance, passing the specified amount of pararaphs.

The output sink is taken by dynamic reference, as it cannot be templated on W: Write because then it overflows the recursion limit when used in format_output().

Trait Implementations

impl<'w> Write for ParagraphPasser<'w>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.