Enum StdlibError 

pub enum StdlibError {
    WrongArgCount {
        function: String,
        expected: usize,
        got: usize,
    },
    TypeMismatch {
        function: String,
        position: usize,
        expected: String,
        got: String,
    },
    AssertionFailed {
        message: String,
    },
    UnknownFunction {
        module: String,
        function: String,
    },
    RuntimeError(String),
    CapabilityCall {
        module: String,
        function: String,
        cap_id: u32,
        fn_id: u32,
        args: Vec<Value>,
    },
}

Errors that can occur when calling stdlib functions.

Variants

WrongArgCount

Wrong number of arguments passed to a function.

Fields

function: String

expected: usize

got: usize

TypeMismatch

Argument has the wrong type.

Fields

function: String

position: usize

expected: String

got: String

AssertionFailed

core.assert failed.

Fields

message: String

UnknownFunction

Unknown function in module.

Fields

module: String

function: String

RuntimeError(String)

Generic runtime error (e.g., NaN would be produced, division by zero).

CapabilityCall

Capability call — cannot be executed locally, must be routed to host. The caller should use cap_id and fn_id for env.host_call dispatch.

Fields

module: String

function: String

cap_id: u32

fn_id: u32

args: Vec<Value>

Implementations

impl StdlibError

pub fn wrong_args(function: &str, expected: usize, got: usize) -> Self

Create a WrongArgCount error.

pub fn type_mismatch( function: &str, position: usize, expected: &str, got: &str, ) -> Self

Create a TypeMismatch error.

pub fn unknown_function(module: &str, function: &str) -> Self

Create an UnknownFunction error.

pub fn capability_call( module: &str, function: &str, cap_id: u32, fn_id: u32, args: Vec<Value>, ) -> Self

Create a CapabilityCall error — signals that this call must be routed to the host.

Trait Implementations

impl Clone for StdlibError

fn clone(&self) -> StdlibError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StdlibError

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

Formats the value using the given formatter.

impl Display for StdlibError

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

Formats the value using the given formatter.

impl Error for StdlibError

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.