iso-10303 0.5.0

A Rust crate for generating STEP reader code.
Documentation 
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use super::{DataType, Expression};

#[derive(Debug)]
pub enum Declaration {
    TypeDef(TypeDef),
    Entity(Entity),
    Function(Function),
    Rule(Rule),
}

#[derive(Debug)]
pub struct TypeDef {
    pub name: String,
    pub underlying_type: DataType,
    pub domain_rules: Vec<DomainRule>,
}

#[derive(Debug)]
pub struct Entity {
    pub name: String,
    pub is_abstract: bool,
    pub supertypes: Vec<String>,
    pub attributes: Vec<Attribute>,
    pub derives: Vec<DerivedAttribute>,
    pub domain_rules: Vec<DomainRule>,
    pub unique_rules: Vec<UniqueRule>,
}

#[derive(Debug)]
pub struct Function {
    pub name: String,
    pub return_type: DataType,
    pub parameters: Vec<Parameter>,
    pub statements: Vec<Statement>,
    pub declarations: Vec<Declaration>,
}

#[derive(Debug)]
pub struct Rule {
    pub name: String,
    pub entities: Vec<String>,
    pub statements: Vec<Statement>,
    pub domain_rules: Vec<DomainRule>,
    pub declarations: Vec<Declaration>,
}

#[derive(Debug, Clone)]
pub struct Attribute {
    pub name: String,
    pub supertype: Option<String>,
    pub data_type: DataType,
    pub optional: bool,
}

#[derive(Debug)]
pub struct DerivedAttribute {
    pub name: String,
    pub supertype: Option<String>,
    pub data_type: DataType,
    pub expr: Expression,
}

#[derive(Debug)]
pub struct AttributeReference {
    pub name: String,
    pub entity: Option<String>,
}

#[derive(Debug)]
pub struct DomainRule {
    pub label: Option<String>,
    pub expr: Expression,
}

#[derive(Debug)]
pub struct UniqueRule {
    pub label: Option<String>,
    pub attributes: Vec<AttributeReference>,
}

#[derive(Debug)]
pub struct Parameter {
    pub name: String,
    pub data_type: DataType,
}

#[derive(Debug)]
pub struct Constant {
    pub name: String,
    pub data_type: DataType,
    pub expr: Expression,
}

#[derive(Debug)]
pub struct Statement {
    pub text: String,
}

impl Declaration {
    pub fn is_type_def(&self) -> bool {
        match self {
            Declaration::TypeDef(_) => true,
            _ => false,
        }
    }
}

impl Entity {
    pub fn get_attribute(&self, name: &str) -> Option<&Attribute> {
        for attribute in &self.attributes {
            if attribute.name == name {
                return Some(attribute);
            }
        }
        return None;
    }
}