fhirpathrs 0.1.0

Fhirpath implementation in Rust
Documentation 
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use crate::{
    error::FhirpathError,
    evaluate::{EvaluateResult, Evaluate, Text},
    parser::expression::TermExpression,
};

use super::resource_node::ResourceNode;

impl Evaluate for TermExpression {
    fn evaluate<'a, 'b>(&self, input: &'a ResourceNode<'a, 'b>) -> EvaluateResult<ResourceNode<'a, 'b>> {
        let child = self.children.first().ok_or(FhirpathError::EvaluateError {
            msg: "Missing TermExpression child element".to_string(),
        })?;

        child.evaluate(input)
    }
}

impl Text for TermExpression {
    fn text(&self) -> EvaluateResult<String> {
        Ok(self
            .children
            .iter()
            .map(|c| c.text())
            .collect::<EvaluateResult<Vec<String>>>()?
            .join(""))
    }
}