shapely_core/shape/
enum_shape.rs

1use super::Field;
2
3/// Describes a variant of an enum
4#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
5pub struct Variant {
6    /// Name of the variant
7    pub name: &'static str,
8
9    /// Discriminant value (if available)
10    pub discriminant: Option<i64>,
11
12    /// Kind of variant (unit, tuple, or struct)
13    pub kind: VariantKind,
14}
15
16/// Represents the different kinds of variants that can exist in a Rust enum
17#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
18pub enum VariantKind {
19    /// Unit variant (e.g., `None` in Option)
20    Unit,
21
22    /// Tuple variant with unnamed fields (e.g., `Some(T)` in Option)
23    Tuple {
24        /// List of fields contained in the tuple variant
25        fields: &'static [Field],
26    },
27
28    /// Struct variant with named fields (e.g., `Struct { field: T }`)
29    Struct {
30        /// List of fields contained in the struct variant
31        fields: &'static [Field],
32    },
33}
34
35/// All possible representations for Rust enums
36#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
37pub enum EnumRepr {
38    /// Default representation (compiler-dependent)
39    Default,
40    /// u8 representation (#[repr(u8)])
41    U8,
42    /// u16 representation (#[repr(u16)])
43    U16,
44    /// u32 representation (#[repr(u32)])
45    U32,
46    /// u64 representation (#[repr(u64)])
47    U64,
48    /// usize representation (#[repr(usize)])
49    USize,
50    /// i8 representation (#[repr(i8)])
51    I8,
52    /// i16 representation (#[repr(i16)])
53    I16,
54    /// i32 representation (#[repr(i32)])
55    I32,
56    /// i64 representation (#[repr(i64)])
57    I64,
58    /// isize representation (#[repr(isize)])
59    ISize,
60}
61
62impl Default for EnumRepr {
63    fn default() -> Self {
64        Self::Default
65    }
66}
67
68/// All possible errors when getting a variant by index or by name
69#[derive(Debug, Copy, Clone, PartialEq, Eq)]
70pub enum VariantError {
71    /// `variant_by_index` was called with an index that is out of bounds.
72    IndexOutOfBounds,
73
74    /// `variant_by_name` or `variant_by_index` was called on a non-enum type.
75    NotAnEnum,
76
77    /// `variant_by_name` was called with a name that doesn't match any variant.
78    NoSuchVariant,
79}
80
81impl std::error::Error for VariantError {}
82
83impl std::fmt::Display for VariantError {
84    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
85        match self {
86            VariantError::IndexOutOfBounds => write!(f, "Variant index out of bounds"),
87            VariantError::NotAnEnum => write!(f, "Not an enum"),
88            VariantError::NoSuchVariant => write!(f, "No such variant"),
89        }
90    }
91}
shapely_core/shape/enum_shape.rs

shapely_core/shape/
enum_shape.rs
