/home/noah/src/ruchy/src/backend/transpiler/types.rs
Line | Count | Source |
1 | | //! Type transpilation and struct/trait definitions |
2 | | |
3 | | #![allow(clippy::missing_errors_doc)] |
4 | | #![allow(clippy::wildcard_imports)] |
5 | | #![allow(clippy::collapsible_else_if)] |
6 | | #![allow(clippy::only_used_in_recursion)] |
7 | | |
8 | | use super::*; |
9 | | use crate::frontend::ast::{EnumVariant, ImplMethod, StructField, TraitMethod, Type}; |
10 | | use anyhow::{bail, Result}; |
11 | | use proc_macro2::TokenStream; |
12 | | use quote::{format_ident, quote}; |
13 | | |
14 | | impl Transpiler { |
15 | | /// Transpiles type annotations |
16 | | /// |
17 | | /// # Examples |
18 | | /// |
19 | | /// ``` |
20 | | /// use ruchy::{Transpiler, Parser}; |
21 | | /// |
22 | | /// // Basic types |
23 | | /// let transpiler = Transpiler::new(); |
24 | | /// let mut parser = Parser::new("let x: i32 = 42"); |
25 | | /// let ast = parser.parse().unwrap(); |
26 | | /// |
27 | | /// let result = transpiler.transpile(&ast).unwrap(); |
28 | | /// let code = result.to_string(); |
29 | | /// assert!(code.contains("i32")); |
30 | | /// assert!(code.contains("42")); |
31 | | /// ``` |
32 | | /// |
33 | | /// ``` |
34 | | /// use ruchy::{Transpiler, Parser}; |
35 | | /// |
36 | | /// // Generic types |
37 | | /// let transpiler = Transpiler::new(); |
38 | | /// let mut parser = Parser::new("let v: Vec<i32> = vec![1, 2, 3]"); |
39 | | /// let ast = parser.parse().unwrap(); |
40 | | /// |
41 | | /// let result = transpiler.transpile(&ast).unwrap(); |
42 | | /// let code = result.to_string(); |
43 | | /// assert!(code.contains("Vec")); |
44 | | /// assert!(code.contains("i32")); |
45 | | /// ``` |
46 | | /// |
47 | | /// ``` |
48 | | /// use ruchy::{Transpiler, Parser}; |
49 | | /// |
50 | | /// // Optional types |
51 | | /// let transpiler = Transpiler::new(); |
52 | | /// let mut parser = Parser::new("let opt: Option<i32> = Some(42)"); |
53 | | /// let ast = parser.parse().unwrap(); |
54 | | /// |
55 | | /// let result = transpiler.transpile(&ast).unwrap(); |
56 | | /// let code = result.to_string(); |
57 | | /// assert!(code.contains("Option")); |
58 | | /// assert!(code.contains("Some")); |
59 | | /// ``` |
60 | 31 | pub fn transpile_type(&self, ty: &Type) -> Result<TokenStream> { |
61 | | use crate::frontend::ast::TypeKind; |
62 | | |
63 | 31 | match &ty.kind { |
64 | 31 | TypeKind::Named(name) => { |
65 | | // Map common Ruchy types to Rust types |
66 | 31 | let rust_type = match name.as_str() { |
67 | 31 | "int" => quote!0 { i64 }, |
68 | 31 | "float" => quote!0 { f64 }, |
69 | 31 | "bool" => quote!0 { bool }, |
70 | 31 | "str" => quote!0 { str }, // Plain str type (will be used with & for references) |
71 | 31 | "string" | "String" => quote!0 { String }, |
72 | 31 | "char" => quote!0 { char }, |
73 | | // PERFORMANCE OPTIMIZATION: Use Rust type inference instead of Any |
74 | 31 | "_" | "Any" => quote!14 { _ }, |
75 | | _ => { |
76 | 17 | let type_ident = format_ident!("{}", name); |
77 | 17 | quote! { #type_ident } |
78 | | } |
79 | | }; |
80 | 31 | Ok(rust_type) |
81 | | } |
82 | 0 | TypeKind::Generic { base, params } => { |
83 | 0 | let base_ident = format_ident!("{}", base); |
84 | 0 | let param_tokens: Result<Vec<_>> = |
85 | 0 | params.iter().map(|p| self.transpile_type(p)).collect(); |
86 | 0 | let param_tokens = param_tokens?; |
87 | 0 | Ok(quote! { #base_ident<#(#param_tokens),*> }) |
88 | | } |
89 | 0 | TypeKind::Optional(inner) => { |
90 | 0 | let inner_tokens = self.transpile_type(inner)?; |
91 | 0 | Ok(quote! { Option<#inner_tokens> }) |
92 | | } |
93 | 0 | TypeKind::List(elem_type) => { |
94 | 0 | let elem_tokens = self.transpile_type(elem_type)?; |
95 | 0 | Ok(quote! { Vec<#elem_tokens> }) |
96 | | } |
97 | 0 | TypeKind::Tuple(types) => { |
98 | 0 | let type_tokens: Result<Vec<_>> = |
99 | 0 | types.iter().map(|t| self.transpile_type(t)).collect(); |
100 | 0 | let type_tokens = type_tokens?; |
101 | 0 | Ok(quote! { (#(#type_tokens),*) }) |
102 | | } |
103 | 0 | TypeKind::Function { params, ret } => { |
104 | 0 | let param_tokens: Result<Vec<_>> = |
105 | 0 | params.iter().map(|p| self.transpile_type(p)).collect(); |
106 | 0 | let param_tokens = param_tokens?; |
107 | 0 | let ret_tokens = self.transpile_type(ret)?; |
108 | | |
109 | | // Rust function type syntax |
110 | 0 | Ok(quote! { fn(#(#param_tokens),*) -> #ret_tokens }) |
111 | | } |
112 | | TypeKind::DataFrame { .. } => { |
113 | | // DataFrames map to Polars DataFrame type |
114 | 0 | Ok(quote! { polars::prelude::DataFrame }) |
115 | | } |
116 | | TypeKind::Series { .. } => { |
117 | | // Series maps to Polars Series type |
118 | 0 | Ok(quote! { polars::prelude::Series }) |
119 | | } |
120 | 0 | TypeKind::Reference { is_mut, inner } => { |
121 | | // Special case: &str should not become &&str |
122 | 0 | if let TypeKind::Named(name) = &inner.kind { |
123 | 0 | if name == "str" { |
124 | | // str is already a reference type in Rust |
125 | 0 | return if *is_mut { |
126 | 0 | Ok(quote! { &mut str }) |
127 | | } else { |
128 | 0 | Ok(quote! { &str }) |
129 | | }; |
130 | 0 | } |
131 | 0 | } |
132 | | |
133 | 0 | let inner_tokens = self.transpile_type(inner)?; |
134 | 0 | if *is_mut { |
135 | 0 | Ok(quote! { &mut #inner_tokens }) |
136 | | } else { |
137 | 0 | Ok(quote! { &#inner_tokens }) |
138 | | } |
139 | | } |
140 | | } |
141 | 31 | } |
142 | | |
143 | | /// Transpiles struct definitions |
144 | 5 | pub fn transpile_struct( |
145 | 5 | &self, |
146 | 5 | name: &str, |
147 | 5 | type_params: &[String], |
148 | 5 | fields: &[StructField], |
149 | 5 | is_pub: bool, |
150 | 5 | ) -> Result<TokenStream> { |
151 | 5 | let struct_name = format_ident!("{}", name); |
152 | | |
153 | 5 | let type_param_tokens: Vec<_> = |
154 | 5 | type_params.iter().map(|p| format_ident!("{}"3 , p)).collect(); |
155 | | |
156 | 5 | let field_tokens: Vec<TokenStream> = fields |
157 | 5 | .iter() |
158 | 5 | .map(|field| { |
159 | 5 | let field_name = format_ident!("{}", field.name); |
160 | 5 | let field_type = self |
161 | 5 | .transpile_type(&field.ty) |
162 | 5 | .unwrap_or_else(|_| quote! { _ }0 ); |
163 | | |
164 | 5 | if field.is_pub { |
165 | 0 | quote! { pub #field_name: #field_type } |
166 | | } else { |
167 | 5 | quote! { #field_name: #field_type } |
168 | | } |
169 | 5 | }) |
170 | 5 | .collect(); |
171 | | |
172 | 5 | let visibility = if is_pub { quote!0 { pub } } else { quote! {} }; |
173 | | |
174 | 5 | if type_params.is_empty() { |
175 | 3 | Ok(quote! { |
176 | | #visibility struct #struct_name { |
177 | | #(#field_tokens,)* |
178 | | } |
179 | | }) |
180 | | } else { |
181 | 2 | Ok(quote! { |
182 | | #visibility struct #struct_name<#(#type_param_tokens),*> { |
183 | | #(#field_tokens,)* |
184 | | } |
185 | | }) |
186 | | } |
187 | 5 | } |
188 | | |
189 | | /// Transpiles trait definitions |
190 | 1 | pub fn transpile_enum( |
191 | 1 | &self, |
192 | 1 | name: &str, |
193 | 1 | type_params: &[String], |
194 | 1 | variants: &[EnumVariant], |
195 | 1 | is_pub: bool, |
196 | 1 | ) -> Result<TokenStream> { |
197 | 1 | let enum_name = format_ident!("{}", name); |
198 | | |
199 | 1 | let type_param_tokens: Vec<_> = |
200 | 2 | type_params1 .iter1 ().map1 (|p| format_ident!("{}", p)).collect1 (); |
201 | | |
202 | | // Check if any variant has discriminant values |
203 | 2 | let has_discriminants1 = variants.iter()1 .any1 (|v| v.discriminant.is_some()); |
204 | | |
205 | 1 | let variant_tokens: Vec<TokenStream> = variants |
206 | 1 | .iter() |
207 | 2 | .map1 (|variant| { |
208 | 2 | let variant_name = format_ident!("{}", variant.name); |
209 | | |
210 | 2 | if let Some(fields) = &variant.fields { |
211 | | // Tuple variant (can't have discriminant) |
212 | 2 | let field_types: Vec<TokenStream> = fields |
213 | 2 | .iter() |
214 | 2 | .map(|ty| self.transpile_type(ty).unwrap_or_else(|_| quote! { _ }0 )) |
215 | 2 | .collect(); |
216 | 2 | quote! { #variant_name(#(#field_types),*) } |
217 | 0 | } else if let Some(disc_value) = variant.discriminant { |
218 | | // Unit variant with explicit discriminant |
219 | | // Convert to i32 literal without suffix for cleaner output |
220 | 0 | let disc_literal = proc_macro2::Literal::i32_unsuffixed(disc_value as i32); |
221 | 0 | quote! { #variant_name = #disc_literal } |
222 | | } else { |
223 | | // Unit variant without discriminant |
224 | 0 | quote! { #variant_name } |
225 | | } |
226 | 2 | }) |
227 | 1 | .collect(); |
228 | | |
229 | 1 | let visibility = if is_pub { quote!0 { pub } } else { quote! {} }; |
230 | | |
231 | | // Add #[repr(i32)] attribute if enum has discriminant values |
232 | 1 | let repr_attr = if has_discriminants { |
233 | 0 | quote! { #[repr(i32)] } |
234 | | } else { |
235 | 1 | quote! {} |
236 | | }; |
237 | | |
238 | 1 | if type_params.is_empty() { |
239 | 0 | Ok(quote! { |
240 | | #repr_attr |
241 | | #visibility enum #enum_name { |
242 | | #(#variant_tokens,)* |
243 | | } |
244 | | }) |
245 | | } else { |
246 | 1 | Ok(quote! { |
247 | | #repr_attr |
248 | | #visibility enum #enum_name<#(#type_param_tokens),*> { |
249 | | #(#variant_tokens,)* |
250 | | } |
251 | | }) |
252 | | } |
253 | 1 | } |
254 | | |
255 | 1 | pub fn transpile_trait( |
256 | 1 | &self, |
257 | 1 | name: &str, |
258 | 1 | type_params: &[String], |
259 | 1 | methods: &[TraitMethod], |
260 | 1 | is_pub: bool, |
261 | 1 | ) -> Result<TokenStream> { |
262 | 1 | let trait_name = format_ident!("{}", name); |
263 | | |
264 | 1 | let method_tokens: Result<Vec<_>> = methods |
265 | 1 | .iter() |
266 | 1 | .map(|method| { |
267 | 1 | let method_name = format_ident!("{}", method.name); |
268 | | |
269 | | // Process parameters |
270 | 1 | let param_tokens: Vec<TokenStream> = method |
271 | 1 | .params |
272 | 1 | .iter() |
273 | 1 | .enumerate() |
274 | 1 | .map(|(i, param)| {0 |
275 | 0 | if i == 0 && (param.name() == "self" || param.name() == "&self") { |
276 | | // Handle self parameter - check if it's &self or self |
277 | 0 | if param.name().starts_with('&') { |
278 | 0 | quote! { &self } |
279 | | } else { |
280 | 0 | quote! { self } |
281 | | } |
282 | | } else { |
283 | 0 | let param_name = format_ident!("{}", param.name()); |
284 | 0 | let type_tokens = self |
285 | 0 | .transpile_type(¶m.ty) |
286 | 0 | .unwrap_or_else(|_| quote! { _ }); |
287 | 0 | quote! { #param_name: #type_tokens } |
288 | | } |
289 | 0 | }) |
290 | 1 | .collect(); |
291 | | |
292 | | // Process return type |
293 | 1 | let return_type_tokens = if let Some(ref ty0 ) = method.return_type { |
294 | 0 | let ty_tokens = self.transpile_type(ty)?; |
295 | 0 | quote! { -> #ty_tokens } |
296 | | } else { |
297 | 1 | quote! {} |
298 | | }; |
299 | | |
300 | | // Process method visibility |
301 | 1 | let visibility = if method.is_pub { quote! { pub } } else { quote!0 {} }; |
302 | | |
303 | | // Process method body (if default implementation) |
304 | 1 | if let Some(ref body0 ) = method.body { |
305 | 0 | let body_tokens = self.transpile_expr(body)?; |
306 | 0 | Ok(quote! { |
307 | | #visibility fn #method_name(#(#param_tokens),*) #return_type_tokens { |
308 | | #body_tokens |
309 | | } |
310 | | }) |
311 | | } else { |
312 | 1 | Ok(quote! { |
313 | | #visibility fn #method_name(#(#param_tokens),*) #return_type_tokens; |
314 | | }) |
315 | | } |
316 | 1 | }) |
317 | 1 | .collect(); |
318 | | |
319 | 1 | let method_tokens = method_tokens?0 ; |
320 | | |
321 | 1 | let type_param_tokens: Vec<_> = |
322 | 1 | type_params.iter().map(|p| format_ident!("{}"0 , p)).collect(); |
323 | | |
324 | 1 | let visibility = if is_pub { quote!0 { pub } } else { quote! {} }; |
325 | | |
326 | 1 | if type_params.is_empty() { |
327 | 1 | Ok(quote! { |
328 | | #visibility trait #trait_name { |
329 | | #(#method_tokens)* |
330 | | } |
331 | | }) |
332 | | } else { |
333 | 0 | Ok(quote! { |
334 | | #visibility trait #trait_name<#(#type_param_tokens),*> { |
335 | | #(#method_tokens)* |
336 | | } |
337 | | }) |
338 | | } |
339 | 1 | } |
340 | | |
341 | | /// Transpiles impl blocks |
342 | 1 | pub fn transpile_impl( |
343 | 1 | &self, |
344 | 1 | for_type: &str, |
345 | 1 | type_params: &[String], |
346 | 1 | trait_name: Option<&str>, |
347 | 1 | methods: &[ImplMethod], |
348 | 1 | _is_pub: bool, |
349 | 1 | ) -> Result<TokenStream> { |
350 | 1 | let type_ident = format_ident!("{}", for_type); |
351 | | |
352 | 1 | let method_tokens: Result<Vec<_>> = methods |
353 | 1 | .iter() |
354 | 1 | .map(|method| {0 |
355 | 0 | let method_name = format_ident!("{}", method.name); |
356 | | |
357 | | // Process parameters |
358 | 0 | let param_tokens: Vec<TokenStream> = method |
359 | 0 | .params |
360 | 0 | .iter() |
361 | 0 | .enumerate() |
362 | 0 | .map(|(i, param)| { |
363 | 0 | if i == 0 && (param.name() == "self" || param.name() == "&self") { |
364 | | // Handle self parameter |
365 | 0 | if param.name().starts_with('&') { |
366 | 0 | quote! { &self } |
367 | | } else { |
368 | 0 | quote! { self } |
369 | | } |
370 | | } else { |
371 | 0 | let param_name = format_ident!("{}", param.name()); |
372 | 0 | let type_tokens = self |
373 | 0 | .transpile_type(¶m.ty) |
374 | 0 | .unwrap_or_else(|_| quote! { _ }); |
375 | 0 | quote! { #param_name: #type_tokens } |
376 | | } |
377 | 0 | }) |
378 | 0 | .collect(); |
379 | | |
380 | | // Process return type |
381 | 0 | let return_type_tokens = if let Some(ref ty) = method.return_type { |
382 | 0 | let ty_tokens = self.transpile_type(ty)?; |
383 | 0 | quote! { -> #ty_tokens } |
384 | | } else { |
385 | 0 | quote! {} |
386 | | }; |
387 | | |
388 | | // Process method body (always present in ImplMethod) |
389 | 0 | let body_tokens = self.transpile_expr(&method.body)?; |
390 | | |
391 | | // Process method visibility |
392 | 0 | let visibility = if method.is_pub { quote! { pub } } else { quote! {} }; |
393 | | |
394 | 0 | Ok(quote! { |
395 | | #visibility fn #method_name(#(#param_tokens),*) #return_type_tokens { |
396 | | #body_tokens |
397 | | } |
398 | | }) |
399 | 0 | }) |
400 | 1 | .collect(); |
401 | | |
402 | 1 | let method_tokens = method_tokens?0 ; |
403 | | |
404 | 1 | let type_param_tokens: Vec<_> = |
405 | 1 | type_params.iter().map(|p| format_ident!("{}"0 , p)).collect(); |
406 | | |
407 | 1 | if let Some(trait_name0 ) = trait_name { |
408 | 0 | let trait_ident = format_ident!("{}", trait_name); |
409 | 0 | if type_params.is_empty() { |
410 | 0 | Ok(quote! { |
411 | | impl #trait_ident for #type_ident { |
412 | | #(#method_tokens)* |
413 | | } |
414 | | }) |
415 | | } else { |
416 | 0 | Ok(quote! { |
417 | | impl<#(#type_param_tokens),*> #trait_ident for #type_ident<#(#type_param_tokens),*> { |
418 | | #(#method_tokens)* |
419 | | } |
420 | | }) |
421 | | } |
422 | | } else { |
423 | 1 | if type_params.is_empty() { |
424 | 1 | Ok(quote! { |
425 | | impl #type_ident { |
426 | | #(#method_tokens)* |
427 | | } |
428 | | }) |
429 | | } else { |
430 | 0 | Ok(quote! { |
431 | | impl<#(#type_param_tokens),*> #type_ident<#(#type_param_tokens),*> { |
432 | | #(#method_tokens)* |
433 | | } |
434 | | }) |
435 | | } |
436 | | } |
437 | 1 | } |
438 | | |
439 | | /// Transpiles property test attributes |
440 | 0 | pub fn transpile_property_test(&self, expr: &Expr, _attr: &Attribute) -> Result<TokenStream> { |
441 | | // Property tests in Rust typically use proptest or quickcheck |
442 | | // We'll generate proptest-compatible code |
443 | | |
444 | | if let ExprKind::Function { |
445 | 0 | name, params, body, .. |
446 | 0 | } = &expr.kind |
447 | | { |
448 | 0 | let fn_name = format_ident!("{}", name); |
449 | | |
450 | | // Generate property test parameters |
451 | 0 | let param_tokens: Vec<TokenStream> = params |
452 | 0 | .iter() |
453 | 0 | .map(|p| { |
454 | 0 | let param_name = format_ident!("{}", p.name()); |
455 | 0 | let type_tokens = self |
456 | 0 | .transpile_type(&p.ty) |
457 | 0 | .unwrap_or_else(|_| quote! { i32 }); |
458 | 0 | quote! { #param_name: #type_tokens } |
459 | 0 | }) |
460 | 0 | .collect(); |
461 | | |
462 | 0 | let body_tokens = self.transpile_expr(body)?; |
463 | | |
464 | | // Generate the proptest macro invocation |
465 | 0 | Ok(quote! { |
466 | | #[cfg(test)] |
467 | | mod #fn_name { |
468 | | use super::*; |
469 | | use proptest::prelude::*; |
470 | | |
471 | | proptest! { |
472 | | #[test] |
473 | | fn #fn_name(#(#param_tokens),*) { |
474 | | #body_tokens |
475 | | } |
476 | | } |
477 | | } |
478 | | }) |
479 | | } else { |
480 | 0 | bail!("Property test attribute can only be applied to functions"); |
481 | | } |
482 | 0 | } |
483 | | |
484 | | /// Transpiles extension methods into trait + impl |
485 | | /// |
486 | | /// Generates both a trait definition and an implementation according to the specification: |
487 | | /// ```rust |
488 | | /// // Ruchy: extend String { fun is_palindrome(&self) -> bool { ... } } |
489 | | /// // Rust: trait StringExt { fn is_palindrome(&self) -> bool; } |
490 | | /// // impl StringExt for String { fn is_palindrome(&self) -> bool { ... } } |
491 | | /// ``` |
492 | 0 | pub fn transpile_extend( |
493 | 0 | &self, |
494 | 0 | target_type: &str, |
495 | 0 | methods: &[ImplMethod], |
496 | 0 | ) -> Result<TokenStream> { |
497 | 0 | let target_ident = format_ident!("{}", target_type); |
498 | 0 | let trait_name = format_ident!("{}Ext", target_type); // e.g., StringExt |
499 | | |
500 | | // Generate trait definition |
501 | 0 | let trait_method_tokens: Result<Vec<_>> = methods |
502 | 0 | .iter() |
503 | 0 | .map(|method| { |
504 | 0 | let method_name = format_ident!("{}", method.name); |
505 | | |
506 | | // Process parameters |
507 | 0 | let param_tokens: Vec<TokenStream> = method |
508 | 0 | .params |
509 | 0 | .iter() |
510 | 0 | .enumerate() |
511 | 0 | .map(|(i, param)| { |
512 | 0 | if i == 0 && (param.name() == "self" || param.name() == "&self") { |
513 | | // Handle self parameter |
514 | 0 | if param.name().starts_with('&') { |
515 | 0 | quote! { &self } |
516 | | } else { |
517 | 0 | quote! { self } |
518 | | } |
519 | | } else { |
520 | 0 | let param_name = format_ident!("{}", param.name()); |
521 | 0 | let type_tokens = self |
522 | 0 | .transpile_type(¶m.ty) |
523 | 0 | .unwrap_or_else(|_| quote! { _ }); |
524 | 0 | quote! { #param_name: #type_tokens } |
525 | | } |
526 | 0 | }) |
527 | 0 | .collect(); |
528 | | |
529 | | // Process return type |
530 | 0 | let return_type_tokens = if let Some(ref ty) = method.return_type { |
531 | 0 | let ty_tokens = self.transpile_type(ty)?; |
532 | 0 | quote! { -> #ty_tokens } |
533 | | } else { |
534 | 0 | quote! {} |
535 | | }; |
536 | | |
537 | | // Trait methods are just signatures (no body) |
538 | 0 | Ok(quote! { |
539 | | fn #method_name(#(#param_tokens),*) #return_type_tokens; |
540 | | }) |
541 | 0 | }) |
542 | 0 | .collect(); |
543 | | |
544 | 0 | let trait_method_tokens = trait_method_tokens?; |
545 | | |
546 | | // Generate impl definition |
547 | 0 | let impl_method_tokens: Result<Vec<_>> = methods |
548 | 0 | .iter() |
549 | 0 | .map(|method| { |
550 | 0 | let method_name = format_ident!("{}", method.name); |
551 | | |
552 | | // Process parameters (same as trait) |
553 | 0 | let param_tokens: Vec<TokenStream> = method |
554 | 0 | .params |
555 | 0 | .iter() |
556 | 0 | .enumerate() |
557 | 0 | .map(|(i, param)| { |
558 | 0 | if i == 0 && (param.name() == "self" || param.name() == "&self") { |
559 | 0 | if param.name().starts_with('&') { |
560 | 0 | quote! { &self } |
561 | | } else { |
562 | 0 | quote! { self } |
563 | | } |
564 | | } else { |
565 | 0 | let param_name = format_ident!("{}", param.name()); |
566 | 0 | let type_tokens = self |
567 | 0 | .transpile_type(¶m.ty) |
568 | 0 | .unwrap_or_else(|_| quote! { _ }); |
569 | 0 | quote! { #param_name: #type_tokens } |
570 | | } |
571 | 0 | }) |
572 | 0 | .collect(); |
573 | | |
574 | | // Process return type |
575 | 0 | let return_type_tokens = if let Some(ref ty) = method.return_type { |
576 | 0 | let ty_tokens = self.transpile_type(ty)?; |
577 | 0 | quote! { -> #ty_tokens } |
578 | | } else { |
579 | 0 | quote! {} |
580 | | }; |
581 | | |
582 | | // Impl methods have bodies |
583 | 0 | let body_tokens = self.transpile_expr(&method.body)?; |
584 | | |
585 | 0 | Ok(quote! { |
586 | | fn #method_name(#(#param_tokens),*) #return_type_tokens { |
587 | | #body_tokens |
588 | | } |
589 | | }) |
590 | 0 | }) |
591 | 0 | .collect(); |
592 | | |
593 | 0 | let impl_method_tokens = impl_method_tokens?; |
594 | | |
595 | | // Generate both trait and impl |
596 | 0 | Ok(quote! { |
597 | | trait #trait_name { |
598 | | #(#trait_method_tokens)* |
599 | | } |
600 | | |
601 | | impl #trait_name for #target_ident { |
602 | | #(#impl_method_tokens)* |
603 | | } |
604 | | }) |
605 | 0 | } |
606 | | } |
607 | | |
608 | | #[cfg(test)] |
609 | | mod tests { |
610 | | use super::*; |
611 | | |
612 | | #[test] |
613 | 1 | fn test_transpile_result_helpers() { |
614 | 1 | let helpers = Transpiler::generate_result_helpers(); |
615 | 1 | let code = helpers.to_string(); |
616 | | |
617 | | // Check that the ResultExt trait is generated |
618 | 1 | assert!(code.contains("trait ResultExt")); |
619 | 1 | assert!(code.contains("map_err_with")); |
620 | 1 | assert!(code.contains("unwrap_or_else_with")); |
621 | 1 | assert!(code.contains("and_then_with")); |
622 | 1 | assert!(code.contains("or_else_with")); |
623 | 1 | } |
624 | | } |