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//! Expression
//!
//! URL: http://hl7.org/fhir/StructureDefinition/Expression
//!
//! Version: 4.0.1
//!
//! An expression that can be used to generate a value
//!
//! FHIR R4: <https://hl7.org/fhir/R4/>
// The `types` import is unused by a handful of types that have only primitive fields.
#![allow(unused_imports)]
use crate::r4::types;
use ::serde::{Deserialize, Serialize};
use fhir_derive_macros::{Builder, Validate};
/// Base StructureDefinition for Expression Type: A expression that is
/// evaluated in a specified context and returns a value. The context of use of
/// the expression must specify the context in which the expression is
/// evaluated, and how the result of the expression is used.
///
/// # Examples
///
/// ```
/// use fhir::r4::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, Builder)]
#[serde(rename_all = "camelCase")]
#[fhir_version("r4")]
pub struct Expression {
/// Unique id for inter-element referencing
pub id: Option<types::String>,
/// Additional content defined by implementations
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub extension: Vec<types::Extension>,
/// Natural language description of the condition
pub description: Option<types::String>,
/// Primitive extension sibling for [`description`](Self::description) (FHIR `_description`):
/// carries `id` and/or `extension` for the primitive value.
#[serde(rename = "_description")]
pub description_ext: Option<types::Element>,
/// Short name assigned to expression for reuse
pub name: Option<types::Id>,
/// Primitive extension sibling for [`name`](Self::name) (FHIR `_name`):
/// carries `id` and/or `extension` for the primitive value.
#[serde(rename = "_name")]
pub name_ext: Option<types::Element>,
/// text/cql | text/fhirpath | application/x-fhir-query | etc.
pub language: types::Code,
/// Primitive extension sibling for [`language`](Self::language) (FHIR `_language`):
/// carries `id` and/or `extension` for the primitive value.
#[serde(rename = "_language")]
pub language_ext: Option<types::Element>,
/// Expression in specified language
pub expression: Option<types::String>,
/// Primitive extension sibling for [`expression`](Self::expression) (FHIR `_expression`):
/// carries `id` and/or `extension` for the primitive value.
#[serde(rename = "_expression")]
pub expression_ext: Option<types::Element>,
/// Where the expression is found
pub reference: Option<types::Uri>,
/// Primitive extension sibling for [`reference`](Self::reference) (FHIR `_reference`):
/// carries `id` and/or `extension` for the primitive value.
#[serde(rename = "_reference")]
pub reference_ext: Option<types::Element>,
}
#[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);
}
}