webwire_cli/schema/
enum.rs

1use std::cell::RefCell;
2use std::collections::HashMap;
3use std::rc::Rc;
4
5use crate::common::FilePosition;
6use crate::idl;
7
8use super::errors::ValidationError;
9use super::fqtn::FQTN;
10use super::namespace::Namespace;
11use super::r#type::Type;
12use super::typemap::TypeMap;
13use super::TypeRef;
14
15#[derive(Clone)]
16pub struct Enum {
17    pub fqtn: FQTN,
18    pub generics: Vec<String>,
19    pub extends: Option<TypeRef>,
20    pub variants: Vec<EnumVariant>,
21    pub all_variants: Vec<EnumVariant>,
22}
23
24#[derive(Clone)]
25pub struct EnumVariant {
26    pub name: String,
27    pub value_type: Option<Type>,
28}
29
30impl Enum {
31    pub(crate) fn from_idl(
32        ienum: &idl::Enum,
33        ns: &Namespace,
34        builtin_types: &HashMap<String, String>,
35    ) -> Self {
36        let variants = ienum
37            .variants
38            .iter()
39            .map(|ivariant| EnumVariant {
40                name: ivariant.name.clone(),
41                value_type: ivariant
42                    .value_type
43                    .as_ref()
44                    .map(|itype| Type::from_idl(itype, &ns, &builtin_types)),
45            })
46            .collect();
47        let extends = ienum
48            .extends
49            .as_ref()
50            .map(|itype| TypeRef::from_idl(itype, &ns, &builtin_types));
51        Self {
52            fqtn: FQTN::new(&ienum.name, ns),
53            generics: ienum.generics.clone(),
54            extends,
55            variants,
56            all_variants: Vec::new(),
57        }
58    }
59    pub(crate) fn resolve(&mut self, type_map: &TypeMap) -> Result<(), ValidationError> {
60        for variant in self.variants.iter_mut() {
61            if let Some(typeref) = &mut variant.value_type {
62                typeref.resolve(type_map)?;
63            }
64        }
65        if let Some(extends) = &mut self.extends {
66            extends.resolve(type_map)?;
67        }
68        self.all_variants.extend(self.resolve_extends()?);
69        Ok(())
70    }
71    fn resolve_extends(&self) -> Result<Vec<EnumVariant>, ValidationError> {
72        let mut variants = self.variants.clone();
73        if let Some(extends) = &self.extends {
74            if let TypeRef::Enum(extends_enum) = extends {
75                variants.extend(
76                    extends_enum
77                        .enum_
78                        .upgrade()
79                        .unwrap()
80                        .borrow()
81                        .resolve_extends()?,
82                );
83            } else {
84                return Err(ValidationError::EnumExtendsNonEnum {
85                    position: FilePosition { line: 0, column: 0 },
86                    r#enum: self.fqtn.clone(),
87                    extends: extends.fqtn(),
88                });
89            }
90        }
91        Ok(variants)
92    }
93    pub fn extends_enum(&self) -> Option<Rc<RefCell<Enum>>> {
94        if let Some(extends) = &self.extends {
95            if let TypeRef::Enum(extends) = extends {
96                Some(extends.enum_.upgrade().unwrap())
97            } else {
98                None
99            }
100        } else {
101            None
102        }
103    }
104}
105
106#[test]
107fn test_schema_enum_extends() {
108    let idl = r"
109        enum Foo { Foo }
110        enum Bar extends Foo { Bar }
111    ";
112    let idoc = crate::idl::parse_document(idl).unwrap();
113    let idocs = vec![idoc];
114    let builtin_types = HashMap::default();
115    let doc = crate::schema::Document::from_idl(idocs.iter(), &builtin_types).unwrap();
116    let foo = doc.ns.types.get("Bar").unwrap();
117    match foo {
118        crate::schema::UserDefinedType::Enum(enum_) => {
119            assert!(enum_.borrow().extends.is_some());
120        }
121        _ => unreachable!(),
122    }
123}
124
125#[test]
126fn test_schema_enum_extends_different_namespace() {
127    let idl = r"
128        enum Foo { Foo }
129        namespace bar {
130            enum Bar extends ::Foo { Bar }
131        }
132        namespace baz {
133            enum Baz extends ::bar::Bar { Baz }
134        }
135    ";
136    let idoc = crate::idl::parse_document(idl).unwrap();
137    let idocs = vec![idoc];
138    let builtin_types = HashMap::default();
139    let doc = crate::schema::Document::from_idl(idocs.iter(), &builtin_types).unwrap();
140    let bar_ns = doc.ns.namespaces.get("bar").unwrap();
141    let bar_type = bar_ns.types.get("Bar").unwrap();
142    match bar_type {
143        crate::schema::UserDefinedType::Enum(enum_) => {
144            assert!(enum_.borrow().extends.is_some());
145        }
146        _ => unreachable!(),
147    }
148    let baz_ns = doc.ns.namespaces.get("baz").unwrap();
149    let baz_type = baz_ns.types.get("Baz").unwrap();
150    match baz_type {
151        crate::schema::UserDefinedType::Enum(enum_) => {
152            assert!(enum_.borrow().extends.is_some());
153        }
154        _ => unreachable!(),
155    }
156}
webwire_cli/schema/enum.rs

webwire_cli/schema/
enum.rs
