Enum EvalError 

pub enum EvalError {
    Singleton {
        operation: String,
        count: usize,
    },
    Type {
        operation: String,
        found: String,
    },
    UnknownFunction {
        name: String,
    },
    Arity {
        function: String,
        expected: &'static str,
        found: usize,
    },
    UnknownElement {
        type_name: String,
        element: String,
    },
    ContextType {
        named: String,
        context: String,
    },
    UnknownType {
        name: String,
    },
    UnknownVariable {
        name: String,
    },
    NoSeam {
        function: &'static str,
    },
    Seam {
        function: &'static str,
        source: SeamError,
    },
    Regex {
        pattern: String,
        source: Error,
    },
    Arithmetic {
        source: ArithmeticError,
    },
    Document {
        element: String,
        reason: String,
    },
    Modifier {
        url: String,
    },
    Unordered {
        operation: String,
    },
    Argument {
        function: String,
        reason: String,
    },
}

Why an evaluation ended without a result.

Variants

Singleton

An operation that takes one item met several (N1 §4.5).

Fields

operation: String

The operator or function.

count: usize

The number of items found.

Type

An operation met an item of a type it does not take.

Fields

operation: String

The operator or function.

found: String

What it met.

UnknownFunction

A function N1 and FHIR R4 do not define.

Fields

name: String

The function name.

Arity

A function called with the wrong number of arguments.

Fields

function: String

The function name.

expected: &'static str

The admitted counts.

found: usize

The count given.

UnknownElement

A member no type of the input defines (N1 §3).

Fields

type_name: String

The type, or the types, navigated from.

element: String

The member name.

ContextType

The expression starts with a type name that is not the context’s type (N1 §3).

Fields

named: String

The type the expression names.

context: String

The type of the context.

UnknownType

A type specifier that names no type (N1 §6.3.1).

Fields

name: String

The specifier as written.

UnknownVariable

An environment variable the environment does not define (N1 §9).

Fields

name: String

The variable name.

NoSeam

A function whose seam the environment does not supply.

Fields

function: &'static str

The function name.

Seam

A seam failed.

Fields

function: &'static str

The function name.

source: SeamError

The seam’s failure.

Regex

A regular expression that does not compile.

Fields

pattern: String

The pattern.

source: Error

The compiler’s failure.

Arithmetic

Date and time arithmetic outside its rules (N1 §6.7).

Fields

source: ArithmeticError

The failure.

Document

The document contradicts the model, as a string where an object belongs.

Fields

element: String

The element path.

reason: String

What is wrong.

Modifier

An element carries a modifier extension checkModifiers() does not admit (FHIR R4 §2.9.1.5).

Fields

url: String

The extension’s url.

Unordered

An order-dependent operation over a collection whose order N1 §3.1 leaves undefined, refused in the strict ordering mode.

Fields

operation: String

The function name, or [] for the indexer.

Argument

An argument outside what the function admits.

Fields

function: String

The function name.

reason: String

What is wrong.

Trait Implementations

impl Debug for EvalError

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

Formats the value using the given formatter.

impl Display for EvalError

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

Formats the value using the given formatter.

impl Error for EvalError

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.