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JsError

rama::js

Struct JsError 

pub struct JsError { /* private fields */ }
Available on crate features js and std only.
Expand description

Error returned by all fallible operations in this crate.

A JsError either originates from the script side (e.g. JsErrorKind::Throw, JsErrorKind::Parse) or from the host side (e.g. JsErrorKind::Conversion). Host functions can return a JsError to throw an error into the running script.

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impl JsError

pub fn conversion(message: impl Into<Box<str>>) -> JsError

Create a new JsErrorKind::Conversion error.

This is the error to return from custom JsArg implementations.

pub fn throw(message: impl Into<Box<str>>) -> JsError

Create a new JsErrorKind::Throw error.

When returned from a host function it is thrown as an error inside the running script.

pub fn kind(&self) -> JsErrorKind

The kind of this error.

pub fn message(&self) -> &str

The human-readable error message.

pub fn thrown(&self) -> Option<&JsValue>

The thrown script value, if this error carries one (only for JsErrorKind::Throw).

Trait Implementations§

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impl Debug for JsError

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Display for JsError

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Error for JsError

1.30.0 · Source§

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more
1.0.0 · Source§

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

Read more
1.0.0 · Source§

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type-based access to context intended for error reports. Read more

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Wrap the error in a context, using fmt::LowerHex as fmt::Debug and fmt::Display.
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Lazily wrap the error with a context, using fmt::LowerHex as fmt::Debug and fmt::Display.
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Same as Self::with_context_field but using a string-like value, this is useful in case you need to pass a string slice which is borrowed and thus cannot be passed as part of ’static error.
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Lazily wrap the error with keyed context using fmt::LowerHex as fmt::Debug and fmt::Display.
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