Trait ResultExt 

pub trait ResultExt<'s> {
    // Required methods
    fn within(self, text: &'s str) -> Self;
    fn regex(self, re: &'static str) -> Self;
    fn regex_group(self, group: usize) -> Self;
    fn message_outside(self, msg: impl Display) -> Self;
    fn message_inside(self, msg: impl Display) -> Self;
    fn expected<T>(self) -> Self;
    fn replace_expected<A, B>(self) -> Self;
    fn at_start(self) -> Self;
    fn at_end(self) -> Self;
}

An extension trait for InptResult, used to provide error context.

Required Methods

fn within(self, text: &'s str) -> Self

Provide a slice of the input text which is known to contain the error, and set that slice as the target of later context.

fn regex(self, re: &'static str) -> Self

Provide the regex which failed to match on the target slice.

fn regex_group(self, group: usize) -> Self

Provide the capture group which contained the target slice.

fn message_outside(self, msg: impl Display) -> Self

Place an additional message outside of whatever context has already been provided.

fn message_inside(self, msg: impl Display) -> Self

Place an additional message inside of whatever context has already been provided.

fn expected<T>(self) -> Self

Provide the type which failed to parse from the target slice.

fn replace_expected<A, B>(self) -> Self

Find the last occurance of type A provided by a call to ResultExt::expected and change it to B.

fn at_start(self) -> Self

Rather than giving an exact slice to ResultExt::within, specify that the error is at the start of wathever slice is provided later.

fn at_end(self) -> Self

Rather than giving an exact slice to ResultExt::within, specify that the error is at the end of wathever slice is provided later.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<'s, R> ResultExt<'s> for InptResult<'s, R>