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use std::io::{Error as IOError, Write};
use std::string::FromUtf8Error;
/// The Output API.
///
/// Handlebars uses this trait to define rendered output.
pub trait Output {
fn write(&mut self, seg: &str) -> Result<(), IOError>;
}
pub struct WriteOutput<W: Write> {
write: W,
}
impl<W: Write> Output for WriteOutput<W> {
fn write(&mut self, seg: &str) -> Result<(), IOError> {
self.write.write_all(seg.as_bytes())
}
}
impl<W: Write> WriteOutput<W> {
pub fn new(write: W) -> WriteOutput<W> {
WriteOutput { write }
}
}
pub struct StringOutput {
buf: Vec<u8>,
}
impl Output for StringOutput {
fn write(&mut self, seg: &str) -> Result<(), IOError> {
self.buf.extend_from_slice(seg.as_bytes());
Ok(())
}
}
impl StringOutput {
pub fn new() -> StringOutput {
StringOutput {
buf: Vec::with_capacity(8 * 1024),
}
}
pub fn into_string(self) -> Result<String, FromUtf8Error> {
String::from_utf8(self.buf)
}
}
impl Default for StringOutput {
fn default() -> Self {
StringOutput::new()
}
}
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