Merge pull request #582 from epage/peek

docs(examples): Avoid parse_peek in production code

examples/ndjson/main.rs

@@ -7,6 +7,7 @@ use winnow::error::ErrMode;
 use winnow::error::Needed;
 use winnow::prelude::*;
 use winnow::stream::Offset;
+use winnow::stream::Stream as _;
 
 fn main() -> Result<(), lexopt::Error> {
  let args = Args::parse()?;
@@ -38,13 +39,15 @@ fn main() -> Result<(), lexopt::Error> {
  buffer.fill(read);
 
  loop {
- let input = parser::Stream::new(std::str::from_utf8(buffer.data()).map_err(to_lexopt)?);
- match parser::ndjson::<ContextError>.parse_peek(input) {
- Ok((remainder, value)) => {
+ let mut input =
+ parser::Stream::new(std::str::from_utf8(buffer.data()).map_err(to_lexopt)?);
+ let start = input.checkpoint();
+ match parser::ndjson::<ContextError>.parse_next(&mut input) {
+ Ok(value) => {
  println!("{value:?}");
  println!();
  // Tell the buffer how much we read
- let consumed = remainder.offset_from(&input);
+ let consumed = input.offset_from(&start);
  buffer.consume(consumed);
  }
  Err(ErrMode::Backtrack(e)) | Err(ErrMode::Cut(e)) => {