xsd_parser/optimizer/
empty_enums.rs

1use crate::types::{Name, ReferenceInfo, TypeVariant};
2
3use super::Optimizer;
4
5impl Optimizer {
6    /// This will remove any enum variant that has an empty string as name.
7    ///
8    /// # Examples
9    ///
10    /// Consider the following XML schema:
11    /// ```xml
12    #[doc = include_str!("../../tests/optimizer/enum_empty_variant.xsd")]
13    /// ```
14    ///
15    /// Without this optimization this will result in the following code:
16    /// ```rust
17    #[doc = include_str!("../../tests/optimizer/expected0/remove_empty_enum_variants.rs")]
18    /// ```
19    ///
20    /// With this optimization the following code is generated:
21    /// ```rust
22    #[doc = include_str!("../../tests/optimizer/expected1/remove_empty_enum_variants.rs")]
23    /// ```
24    pub fn remove_empty_enum_variants(mut self) -> Self {
25        tracing::debug!("remove_empty_enum_variants");
26
27        for type_ in self.types.types.values_mut() {
28            if let TypeVariant::Enumeration(x) = &mut type_.variant {
29                x.variants
30                    .retain(|x| !matches!(&x.ident.name, Name::Named(x) if x.is_empty()));
31            }
32        }
33
34        self
35    }
36
37    /// This will replace the enum with a type reference to the enums base type
38    /// if the enum does not have any variant.
39    ///
40    /// This optimization is usually used in combination with
41    /// [`remove_empty_enum_variants`](Self::remove_empty_enum_variants).
42    ///
43    /// # Examples
44    ///
45    /// Consider the following XML schema:
46    /// ```xml
47    #[doc = include_str!("../../tests/optimizer/enum_empty.xsd")]
48    /// ```
49    ///
50    /// Without this optimization this will result in the following code:
51    /// ```rust
52    #[doc = include_str!("../../tests/optimizer/expected0/remove_empty_enums.rs")]
53    /// ```
54    ///
55    /// With this optimization (and the [`remove_empty_enum_variants`](Self::remove_empty_enum_variants))
56    /// the following code is generated:
57    /// ```rust
58    #[doc = include_str!("../../tests/optimizer/expected1/remove_empty_enums.rs")]
59    /// ```
60    pub fn remove_empty_enums(mut self) -> Self {
61        tracing::debug!("remove_empty_enums");
62
63        for type_ in self.types.types.values_mut() {
64            if let TypeVariant::Enumeration(x) = &mut type_.variant {
65                if x.variants.is_empty() {
66                    if let Some(base) = x.base.as_ident() {
67                        self.typedefs = None;
68                        type_.variant = TypeVariant::Reference(ReferenceInfo::new(base.clone()));
69                    }
70                }
71            }
72        }
73
74        self
75    }
76}
xsd_parser/optimizer/empty_enums.rs

xsd_parser/optimizer/
empty_enums.rs
