alef_core/ir.rs
1use serde::{Deserialize, Serialize};
2
3/// Indicates the core Rust type wraps the resolved type in a smart pointer or cow.
4/// Used by codegen to generate correct From/Into conversions.
5#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Default)]
6pub enum CoreWrapper {
7 #[default]
8 None,
9 /// `Cow<'static, str>` — binding uses String, core needs `.into()`
10 Cow,
11 /// `Arc<T>` — binding unwraps, core wraps with `Arc::new()`
12 Arc,
13 /// `bytes::Bytes` — binding uses `Vec<u8>`, core needs `Bytes::from()`
14 Bytes,
15 /// `Arc<Mutex<T>>` — binding wraps with `Arc::new(Mutex::new())`, methods call `.lock()`
16 ArcMutex,
17}
18
19/// Typed default value for a field, enabling backends to emit language-native defaults.
20#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
21pub enum DefaultValue {
22 BoolLiteral(bool),
23 StringLiteral(String),
24 IntLiteral(i64),
25 FloatLiteral(f64),
26 EnumVariant(String),
27 /// Empty collection or Default::default()
28 Empty,
29 /// None / null
30 None,
31}
32
33/// Complete API surface extracted from a Rust crate's public interface.
34#[derive(Debug, Clone, Serialize, Deserialize)]
35pub struct ApiSurface {
36 pub crate_name: String,
37 pub version: String,
38 pub types: Vec<TypeDef>,
39 pub functions: Vec<FunctionDef>,
40 pub enums: Vec<EnumDef>,
41 pub errors: Vec<ErrorDef>,
42}
43
44/// A public struct exposed to bindings.
45#[derive(Debug, Clone, Serialize, Deserialize)]
46pub struct TypeDef {
47 pub name: String,
48 pub rust_path: String,
49 /// Original rust_path before path mapping rewrites. Used for From impl
50 /// targets to avoid orphan rule violations when core_import is a re-export facade.
51 #[serde(default)]
52 pub original_rust_path: String,
53 pub fields: Vec<FieldDef>,
54 pub methods: Vec<MethodDef>,
55 pub is_opaque: bool,
56 pub is_clone: bool,
57 /// True if the type derives `Copy` (or is bitwise-copyable).
58 /// Used by FFI codegen to avoid emitting `.clone()` (which trips clippy::clone_on_copy).
59 #[serde(default)]
60 pub is_copy: bool,
61 pub doc: String,
62 #[serde(default)]
63 pub cfg: Option<String>,
64 /// True if this type was extracted from a trait definition.
65 /// Trait types need `dyn` keyword when used as opaque inner types.
66 #[serde(default)]
67 pub is_trait: bool,
68 /// True if the type implements Default (via derive or manual impl).
69 /// Used by backends like NAPI to make all fields optional with defaults.
70 #[serde(default)]
71 pub has_default: bool,
72 /// True if some fields were stripped due to `#[cfg]` conditions.
73 /// When true, struct literal initializers need `..Default::default()` to fill
74 /// the missing fields that may exist when the core crate is compiled with features.
75 #[serde(default)]
76 pub has_stripped_cfg_fields: bool,
77 /// True if this type appears as a function return type.
78 /// Used to select output DTO style (e.g., TypedDict for Python return types).
79 #[serde(default)]
80 pub is_return_type: bool,
81 /// Serde `rename_all` strategy for this type (e.g., `"camelCase"`, `"snake_case"`).
82 /// Used by Go/Java/C# backends to emit correct JSON tags matching Rust serde config.
83 #[serde(default)]
84 pub serde_rename_all: Option<String>,
85 /// True if the type derives `serde::Serialize` and `serde::Deserialize`.
86 /// Used by FFI backend to gate `from_json`/`to_json` generation — types
87 /// without serde derives cannot be (de)serialized.
88 #[serde(default)]
89 pub has_serde: bool,
90 /// Super-traits of this trait (e.g., `["Plugin"]` for `OcrBackend: Plugin`).
91 /// Only populated when `is_trait` is true. Used by trait bridge codegen
92 /// to determine which super-trait impls to generate.
93 #[serde(default)]
94 pub super_traits: Vec<String>,
95}
96
97/// A field on a public struct.
98#[derive(Debug, Clone, Serialize, Deserialize)]
99pub struct FieldDef {
100 pub name: String,
101 pub ty: TypeRef,
102 pub optional: bool,
103 pub default: Option<String>,
104 pub doc: String,
105 /// True if this field's type was sanitized (e.g., Duration→u64, trait object→String).
106 /// Fields marked sanitized cannot participate in auto-generated From/Into conversions.
107 #[serde(default)]
108 pub sanitized: bool,
109 /// True if the core field type is `Box<T>` (or `Option<Box<T>>`).
110 /// Used by FFI backends to insert proper deref when cloning field values.
111 #[serde(default)]
112 pub is_boxed: bool,
113 /// Fully qualified Rust path for the field's type (e.g. `my_crate::types::OutputFormat`).
114 /// Used by backends to disambiguate types with the same short name.
115 #[serde(default)]
116 pub type_rust_path: Option<String>,
117 /// `#[cfg(...)]` condition string on this field, if any.
118 /// Used by backends to conditionally include fields in struct literals.
119 #[serde(default)]
120 pub cfg: Option<String>,
121 /// Typed default value for language-native default emission.
122 #[serde(default)]
123 pub typed_default: Option<DefaultValue>,
124 /// Core wrapper on this field (Cow, Arc, Bytes). Affects From/Into codegen.
125 #[serde(default)]
126 pub core_wrapper: CoreWrapper,
127 /// Core wrapper on Vec inner elements (e.g., `Vec<Arc<T>>`).
128 #[serde(default)]
129 pub vec_inner_core_wrapper: CoreWrapper,
130 /// Full Rust path of the newtype wrapper that was resolved away for this field,
131 /// e.g. `"my_crate::NodeIndex"` when `NodeIndex(u32)` was resolved to `u32`.
132 /// When set, binding→core codegen must wrap values into the newtype
133 /// (e.g. `my_crate::NodeIndex(val.field)`) and core→binding codegen must unwrap (`.0`).
134 #[serde(default)]
135 pub newtype_wrapper: Option<String>,
136}
137
138/// A method on a public struct.
139#[derive(Debug, Clone, Serialize, Deserialize)]
140pub struct MethodDef {
141 pub name: String,
142 pub params: Vec<ParamDef>,
143 pub return_type: TypeRef,
144 pub is_async: bool,
145 pub is_static: bool,
146 pub error_type: Option<String>,
147 pub doc: String,
148 pub receiver: Option<ReceiverKind>,
149 /// True if any param or return type was sanitized during unknown type resolution.
150 /// Methods with sanitized signatures cannot be auto-delegated.
151 #[serde(default)]
152 pub sanitized: bool,
153 /// Fully qualified trait path if this method comes from a trait impl
154 /// (e.g. "liter_llm::LlmClient"). None for inherent methods.
155 #[serde(default)]
156 pub trait_source: Option<String>,
157 /// True if the core function returns a reference (`&T`, `Option<&T>`, etc.).
158 /// Used by code generators to insert `.clone()` before type conversion.
159 #[serde(default)]
160 pub returns_ref: bool,
161 /// True if the core function returns `Cow<'_, T>` where T is a named type (not str/bytes).
162 /// Used by code generators to emit `.into_owned()` before type conversion.
163 #[serde(default)]
164 pub returns_cow: bool,
165 /// Full Rust path of the newtype wrapper that was resolved away for the return type,
166 /// e.g. `"my_crate::NodeIndex"` when the return type `NodeIndex(u32)` was resolved to `u32`.
167 /// When set, codegen must unwrap the returned newtype value (e.g. `result.0`) before returning.
168 #[serde(default)]
169 pub return_newtype_wrapper: Option<String>,
170 /// True if this method has a default implementation in the trait definition.
171 /// Methods with defaults can be optionally implemented by the foreign object
172 /// in trait bridge codegen.
173 #[serde(default)]
174 pub has_default_impl: bool,
175}
176
177/// How `self` is received.
178#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
179pub enum ReceiverKind {
180 Ref,
181 RefMut,
182 Owned,
183}
184
185/// A free function exposed to bindings.
186#[derive(Debug, Clone, Serialize, Deserialize)]
187pub struct FunctionDef {
188 pub name: String,
189 pub rust_path: String,
190 #[serde(default)]
191 pub original_rust_path: String,
192 pub params: Vec<ParamDef>,
193 pub return_type: TypeRef,
194 pub is_async: bool,
195 pub error_type: Option<String>,
196 pub doc: String,
197 #[serde(default)]
198 pub cfg: Option<String>,
199 /// True if any param or return type was sanitized during unknown type resolution.
200 #[serde(default)]
201 pub sanitized: bool,
202 /// True if the core function returns a reference (`&T`, `Option<&T>`, etc.).
203 /// Used by code generators to insert `.clone()` before type conversion.
204 #[serde(default)]
205 pub returns_ref: bool,
206 /// True if the core function returns `Cow<'_, T>` where T is a named type (not str/bytes).
207 /// Used by code generators to emit `.into_owned()` before type conversion.
208 #[serde(default)]
209 pub returns_cow: bool,
210 /// Full Rust path of the newtype wrapper that was resolved away for the return type.
211 /// When set, codegen must unwrap the returned newtype value (e.g. `result.0`).
212 #[serde(default)]
213 pub return_newtype_wrapper: Option<String>,
214}
215
216/// A function/method parameter.
217#[derive(Debug, Clone, Serialize, Deserialize)]
218pub struct ParamDef {
219 pub name: String,
220 pub ty: TypeRef,
221 pub optional: bool,
222 pub default: Option<String>,
223 /// True if this param's type was sanitized during unknown type resolution.
224 #[serde(default)]
225 pub sanitized: bool,
226 /// Typed default value for language-native default emission.
227 #[serde(default)]
228 pub typed_default: Option<DefaultValue>,
229 /// True if the original Rust parameter was a reference (`&T`).
230 /// Used by codegen to generate owned intermediates and pass refs.
231 #[serde(default)]
232 pub is_ref: bool,
233 /// True if the original Rust parameter was a mutable reference (`&mut T`).
234 /// Used by codegen to generate `&mut` refs when calling core functions.
235 #[serde(default)]
236 pub is_mut: bool,
237 /// Full Rust path of the newtype wrapper that was resolved away for this param,
238 /// e.g. `"my_crate::NodeIndex"` when `NodeIndex(u32)` was resolved to `u32`.
239 /// When set, codegen must wrap the raw value back into the newtype when calling core:
240 /// `my_crate::NodeIndex(param)` instead of just `param`.
241 #[serde(default)]
242 pub newtype_wrapper: Option<String>,
243 /// Original Rust type before sanitization, stored when param.sanitized=true.
244 /// Allows codegen to reconstruct proper deserialization logic.
245 /// E.g. `"Vec<(PathBuf, Option<FileExtractionConfig>)>"` when sanitized to `Vec<String>`.
246 #[serde(default)]
247 pub original_type: Option<String>,
248}
249
250/// A public enum.
251#[derive(Debug, Clone, Serialize, Deserialize)]
252pub struct EnumDef {
253 pub name: String,
254 pub rust_path: String,
255 #[serde(default)]
256 pub original_rust_path: String,
257 pub variants: Vec<EnumVariant>,
258 pub doc: String,
259 #[serde(default)]
260 pub cfg: Option<String>,
261 /// True if the enum derives `Copy`. Only unit-variant enums can derive Copy.
262 /// Used by FFI codegen to avoid emitting `.clone()` (which trips clippy::clone_on_copy).
263 #[serde(default)]
264 pub is_copy: bool,
265 /// Serde tag property name for internally tagged enums (from `#[serde(tag = "...")]`)
266 #[serde(default, skip_serializing_if = "Option::is_none")]
267 pub serde_tag: Option<String>,
268 /// Serde rename strategy for enum variants (from `#[serde(rename_all = "...")]`)
269 #[serde(default, skip_serializing_if = "Option::is_none")]
270 pub serde_rename_all: Option<String>,
271}
272
273/// An enum variant.
274#[derive(Debug, Clone, Serialize, Deserialize)]
275pub struct EnumVariant {
276 pub name: String,
277 pub fields: Vec<FieldDef>,
278 pub doc: String,
279 /// True if this variant has `#[default]` attribute (used by `#[derive(Default)]`).
280 #[serde(default)]
281 pub is_default: bool,
282 /// Explicit serde rename for this variant (from `#[serde(rename = "...")]`).
283 #[serde(default, skip_serializing_if = "Option::is_none")]
284 pub serde_rename: Option<String>,
285 /// True if this is a tuple variant (unnamed fields like `Variant(T1, T2)`).
286 /// False for struct variants with named fields or unit variants.
287 #[serde(default)]
288 pub is_tuple: bool,
289}
290
291/// An error type (enum used in Result<T, E>).
292#[derive(Debug, Clone, Serialize, Deserialize)]
293pub struct ErrorDef {
294 pub name: String,
295 pub rust_path: String,
296 #[serde(default)]
297 pub original_rust_path: String,
298 pub variants: Vec<ErrorVariant>,
299 pub doc: String,
300}
301
302/// An error variant.
303#[derive(Debug, Clone, Serialize, Deserialize)]
304pub struct ErrorVariant {
305 pub name: String,
306 /// The `#[error("...")]` message template string, e.g. `"I/O error: {0}"`.
307 pub message_template: Option<String>,
308 /// Fields on this variant (struct or tuple fields).
309 #[serde(default)]
310 pub fields: Vec<FieldDef>,
311 /// True if any field has `#[source]` or `#[from]`.
312 #[serde(default)]
313 pub has_source: bool,
314 /// True if any field has `#[from]` (auto From conversion).
315 #[serde(default)]
316 pub has_from: bool,
317 /// True if this is a unit variant (no fields).
318 #[serde(default)]
319 pub is_unit: bool,
320 pub doc: String,
321}
322
323/// Reference to a type, with enough info for codegen.
324#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
325pub enum TypeRef {
326 Primitive(PrimitiveType),
327 String,
328 /// Rust `char` — single Unicode character. Binding layer represents as single-char string.
329 Char,
330 Bytes,
331 Optional(Box<TypeRef>),
332 Vec(Box<TypeRef>),
333 Map(Box<TypeRef>, Box<TypeRef>),
334 Named(String),
335 Path,
336 Unit,
337 Json,
338 Duration,
339}
340
341impl TypeRef {
342 /// Returns true if this type reference contains `Named(name)` at any depth.
343 pub fn references_named(&self, name: &str) -> bool {
344 match self {
345 Self::Named(n) => n == name,
346 Self::Optional(inner) | Self::Vec(inner) => inner.references_named(name),
347 Self::Map(k, v) => k.references_named(name) || v.references_named(name),
348 _ => false,
349 }
350 }
351}
352
353/// Rust primitive types.
354#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
355pub enum PrimitiveType {
356 Bool,
357 U8,
358 U16,
359 U32,
360 U64,
361 I8,
362 I16,
363 I32,
364 I64,
365 F32,
366 F64,
367 Usize,
368 Isize,
369}