Enum BuildError 

#[non_exhaustive]
pub enum BuildError {
    DuplicateErrorHook,
    DuplicateMethod(String),
    ReservedMethod(String),
    DuplicateCommand(String),
    EmptyCommandName,
    ExecuteCommandConflict,
    ConflictingCapability {
        field: &'static str,
    },
    DuplicateConfigureInitialize,
    DuplicateLifecycleHook(&'static str),
    InvalidConcurrencyLimit,
    InvalidOutboundWarningThreshold,
    InvalidResourcePolicy {
        field: ResourcePolicyField,
    },
}

A configuration error surfaced by ServerBuilder::build.

BuildError is deliberately distinct from LspError: it names a static registration mistake the developer must fix before the server ever runs, never a value that goes on the wire. build() performs no I/O and returns this before any transport is touched.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

DuplicateErrorHook

More than one connection-level error hook was registered.

DuplicateMethod(String)

Two handlers were registered for the same request method.

ReservedMethod(String)

A custom request or notification was registered under a method the framework owns (initialize, shutdown, exit, initialized, $/cancelRequest).

DuplicateCommand(String)

Two handlers were registered for the same command name.

EmptyCommandName

A command was registered with an empty name; a command name is the key the editor sends on workspace/executeCommand, so it cannot be empty.

ExecuteCommandConflict

One or more commands were registered alongside an explicit workspace/executeCommand request handler. Commands already dispatch beneath that method, so a user handler for it would shadow them.

ConflictingCapability

Two contributions disagreed on a capability field that must be singular within its family, or a dependent feature was registered without the base its family requires (ADR 0017). Capability construction never resolves such a clash by last-write-wins; it fails the build instead.

Fields

field: &'static str

The singular ServerCapabilities field with conflicting inputs.

DuplicateConfigureInitialize

configure_initialize was supplied more than once. There is exactly one initialization-dependent registration transaction (ADR 0017).

DuplicateLifecycleHook(&'static str)

A lifecycle hook (on_initialize, …) was supplied more than once. Each hook has at most one registration (ADR 0018).

InvalidConcurrencyLimit

A zero concurrency limit could never admit a user call.

InvalidOutboundWarningThreshold

A zero outbound warning threshold could never be crossed from below.

InvalidResourcePolicy

A connection resource budget or enabled deadline was zero.

Fields

field: ResourcePolicyField

The invalid ResourcePolicy field.

Trait Implementations

impl Debug for BuildError

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

Formats the value using the given formatter.

impl Display for BuildError

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

Formats the value using the given formatter.

impl Eq for BuildError

impl Error for BuildError

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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.

impl PartialEq for BuildError

fn eq(&self, other: &BuildError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for BuildError