opendrive 0.1.0+1.7.0

OpenDRIVE parser and writer for Rust
Documentation 
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use crate::core::additional_data::AdditionalData;
use crate::object::lane_validity::LaneValidity;
use crate::object::orientation::Orientation;
use std::borrow::Cow;
use uom::si::f64::Length;
use uom::si::length::meter;

/// It is possible to link an object with one or more roads, signals or other objects using a
/// `<objectReference>` element. The referenced objects require a unique ID. The object reference
/// element consists of a main element and an optional lane validity element. The rules for validity
/// elements are the same as for objects.
#[derive(Debug, Clone, PartialEq)]
pub struct ObjectReference {
    /// Unique ID of the referred object within the database
    pub id: String,
    /// - "+" = valid in positive s-direction
    /// - "-" = valid in negative s-direction
    /// - "none" = valid in both directions
    pub orientation: Orientation,
    /// s-coordinate
    pub s: Length,
    /// t-coordinate
    pub t: Length,
    /// Validity of the object along s-axis (0.0 for point object)
    pub valid_length: Option<Length>,
    /// z offset relative to the elevation of the reference line
    pub z_offset: Option<Length>,
    pub validity: Vec<LaneValidity>,
    pub additional_data: AdditionalData,
}

impl ObjectReference {
    pub fn visit_attributes(
        &self,
        visitor: impl for<'b> FnOnce(
            Cow<'b, [xml::attribute::Attribute<'b>]>,
        ) -> xml::writer::Result<()>,
    ) -> xml::writer::Result<()> {
        visit_attributes_flatten!(
            visitor,
            "id" => Some(self.id.as_str()),
            "orientation" => Some(self.orientation.as_str()),
            "s" => Some(self.s.value.to_scientific_string()).as_deref(),
            "t" => Some(self.t.value.to_scientific_string()).as_deref(),
            "validLength" => self.valid_length.as_ref().map(|v| v.value.to_scientific_string()).as_deref(),
            "zOffset" => self.z_offset.as_ref().map(|v| v.value.to_scientific_string()).as_deref(),
        )
    }

    pub fn visit_children(
        &self,
        mut visitor: impl FnMut(xml::writer::XmlEvent) -> xml::writer::Result<()>,
    ) -> xml::writer::Result<()> {
        for validity in &self.validity {
            visit_children!(visitor, "validity" => validity);
        }

        self.additional_data.append_children(visitor)
    }
}

impl<'a, I> TryFrom<crate::parser::ReadContext<'a, I>> for ObjectReference
where
    I: Iterator<Item = xml::reader::Result<xml::reader::XmlEvent>>,
{
    type Error = Box<crate::parser::Error>;

    fn try_from(mut read: crate::parser::ReadContext<'a, I>) -> Result<Self, Self::Error> {
        let mut validity = Vec::new();
        let mut additional_data = AdditionalData::default();

        match_child_eq_ignore_ascii_case!(
            read,
            "validity" => LaneValidity => |v| validity.push(v),
            _ => |_name, context| additional_data.fill(context),
        );

        Ok(Self {
            id: read.attribute("id")?,
            orientation: read.attribute("orientation")?,
            s: read.attribute("s").map(Length::new::<meter>)?,
            t: read.attribute("t").map(Length::new::<meter>)?,
            valid_length: read.attribute_opt("validLength")?.map(Length::new::<meter>),
            z_offset: read.attribute_opt("zOffset")?.map(Length::new::<meter>),
            validity,
            additional_data,
        })
    }
}

#[cfg(feature = "fuzzing")]
impl arbitrary::Arbitrary<'_> for ObjectReference {
    fn arbitrary(u: &mut arbitrary::Unstructured) -> arbitrary::Result<Self> {
        use crate::fuzzing::NotNan;
        Ok(Self {
            id: u.arbitrary()?,
            orientation: u.arbitrary()?,
            s: Length::new::<meter>(u.not_nan_f64()?),
            t: Length::new::<meter>(u.not_nan_f64()?),
            valid_length: u
                .arbitrary::<Option<()>>()?
                .map(|_| u.not_nan_f64())
                .transpose()?
                .map(Length::new::<meter>),
            z_offset: u
                .arbitrary::<Option<()>>()?
                .map(|_| u.not_nan_f64())
                .transpose()?
                .map(Length::new::<meter>),
            validity: u.arbitrary()?,
            additional_data: u.arbitrary()?,
        })
    }
}