Struct whiteread::adapters::WithCheapError

pub struct WithCheapError<T>(pub T);

Hints the parsing function not to render errors

By default, Reader will pretty-print the error location, like so.

This struct is intended to be used when an error is expected and rendering the lineinfo (which creates an allocation to remember the source line) is not needed.

Examples

use whiteread::reader::Reader;
use whiteread::adapters::WithCheapError;
use std::io::Cursor;

// The displayed error doesn't contain the rendered lineinfo.
let result = Reader::new(Cursor::new("foo")).parse::<WithCheapError<i32>>();
assert!(!result.unwrap_err().to_string().contains("foo"));

// By default the error line is pretty printed.
let result = Reader::new(Cursor::new("foo")).parse::<i32>();
assert!(result.unwrap_err().to_string().contains("foo"));

Trait Implementations

impl<T: FromStream> FromStream for WithCheapError<T>

fn read<I: StrStream>(it: &mut I) -> Result<WithCheapError<T>>

Reads a value from a str-producing stream.

const REQUEST_CHEAP_ERROR: bool

Whether a function returning this type should produce cheap errors instead of pretty-printed ones.

impl<T: Default> Default for WithCheapError<T>

fn default() -> WithCheapError<T>

Returns the "default value" for a type.

impl<T: Debug> Debug for WithCheapError<T>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.