Struct EmailWriter

pub struct EmailWriter<'a> { /* private fields */ }

Wrapper around Write that remembers the length of the last line written to it.

Implementations

impl<'a> EmailWriter<'a>

pub fn new( writer: &'a mut dyn Write, line_len: usize, spaces: usize, optional_breakpoint: bool, can_go_to_new_line_now: bool, ) -> Self

Construct a new EmailWriter.

• line_len is the length of the last line in writer.
• spaces the number of spaces that must be written before the next write.
• can_go_to_new_line_now is whether the current line can be wrapped now or not.

pub fn new_line(&mut self) -> Result

Go to a new line and reset the line_len to 0.

pub fn space(&mut self)

Write a space which might get wrapped to a new line on the next write.

pub fn optional_breakpoint(&mut self)

Write a space which won’t be printed if the line wraps.

This method shouldn’t be called multiple times consecutively, and will panic if debug assertions are on.

pub fn line_len(&self) -> usize

Get the length in bytes of the last line written to the inner writer.

pub fn projected_line_len(&self) -> usize

Get the length in bytes of the last line written to the inner writer plus the spaces which might be written to in on the next write call.

pub fn folding<'b>(&'b mut self) -> FoldingEmailWriter<'a, 'b>

Get a Writer which automatically line folds text written to it.

Trait Implementations

impl<'a> Drop for EmailWriter<'a>

fn drop(&mut self)

Executes the destructor for this type.

impl<'a> Write for EmailWriter<'a>

fn write_str(&mut self, s: &str) -> Result

Writes a string slice into this writer, returning whether the write succeeded.

fn write_char(&mut self, c: char) -> Result

Writes a char into this writer, returning whether the write succeeded.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Glue for usage of the write! macro with implementors of this trait.