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//! Expression
//!
//! URL: http://hl7.org/fhir/StructureDefinition/Expression
//!
//! Version: 5.0.0
//!
//! Expression Type: A expression that is evaluated in a specified context and returns a value.
//!
//! FHIR: <https://build.fhir.org/>
//!
//! UML: <https://build.fhir.org/uml.html>
// Allow unused crate::r5::types as types;
#![allow(unused_imports)]
use crate::r5::types;
use ::serde::{Deserialize, Serialize};
use fhir_derive_macros::Validate;
/// Expression is a FHIR R5 complex datatype that captures an expression which is
/// evaluated in a specified context and returns a value. The context of use must
/// specify the environment in which the expression is evaluated and how its result
/// is used. Expressions are commonly written in languages such as FHIRPath, CQL, or
/// as FHIR query strings, and may be provided inline or referenced by URI.
///
/// # Examples
///
/// ```
/// use fhir::r5::types::expression::Expression;
///
/// let value = Expression::default();
/// let json = ::serde_json::to_value(&value).unwrap();
/// let back: Expression = ::serde_json::from_value(json).unwrap();
/// assert_eq!(value, back);
/// ```
#[serde_with::skip_serializing_none]
#[derive(Debug, Default, Clone, Serialize, Deserialize, PartialEq, Eq, Validate)]
#[serde(rename_all = "camelCase")]
pub struct Expression {
/// Unique id for inter-element referencing
pub id: Option<types::String>,
/// Additional content defined by implementations
pub extension: Option<Vec<types::Extension>>,
/// Natural language description of the condition
pub description: Option<types::String>,
/// Short name assigned to expression for reuse
pub name: Option<types::Code>,
/// text/cql | text/fhirpath | application/x-fhir-query | etc.
pub language: Option<types::Code>,
/// Expression in specified language
pub expression: Option<types::String>,
/// Where the expression is found
pub reference: Option<types::Uri>,
}
#[cfg(test)]
mod tests {
use super::*;
type T = Expression;
#[test]
fn test_default() {
let _ = T::default();
}
#[test]
fn test_serde_round_trip() {
let value = T::default();
let json = ::serde_json::to_value(&value).expect("to_value");
let back: T = ::serde_json::from_value(json).expect("from_value");
assert_eq!(value, back);
}
}