]>
Commit | Line | Data |
---|---|---|
f20569fa | 1 | use crate::clippy_project_root; |
064997fb | 2 | use indoc::{indoc, writedoc}; |
04454e1e | 3 | use std::fmt::Write as _; |
f20569fa XL |
4 | use std::fs::{self, OpenOptions}; |
5 | use std::io::prelude::*; | |
6 | use std::io::{self, ErrorKind}; | |
7 | use std::path::{Path, PathBuf}; | |
8 | ||
9 | struct LintData<'a> { | |
10 | pass: &'a str, | |
11 | name: &'a str, | |
12 | category: &'a str, | |
064997fb | 13 | ty: Option<&'a str>, |
f20569fa XL |
14 | project_root: PathBuf, |
15 | } | |
16 | ||
17 | trait Context { | |
18 | fn context<C: AsRef<str>>(self, text: C) -> Self; | |
19 | } | |
20 | ||
21 | impl<T> Context for io::Result<T> { | |
22 | fn context<C: AsRef<str>>(self, text: C) -> Self { | |
23 | match self { | |
24 | Ok(t) => Ok(t), | |
25 | Err(e) => { | |
26 | let message = format!("{}: {}", text.as_ref(), e); | |
27 | Err(io::Error::new(ErrorKind::Other, message)) | |
28 | }, | |
29 | } | |
30 | } | |
31 | } | |
32 | ||
33 | /// Creates the files required to implement and test a new lint and runs `update_lints`. | |
34 | /// | |
35 | /// # Errors | |
36 | /// | |
37 | /// This function errors out if the files couldn't be created or written to. | |
923072b8 FG |
38 | pub fn create( |
39 | pass: Option<&String>, | |
40 | lint_name: Option<&String>, | |
064997fb FG |
41 | category: Option<&str>, |
42 | mut ty: Option<&str>, | |
923072b8 FG |
43 | msrv: bool, |
44 | ) -> io::Result<()> { | |
064997fb FG |
45 | if category == Some("cargo") && ty.is_none() { |
46 | // `cargo` is a special category, these lints should always be in `clippy_lints/src/cargo` | |
47 | ty = Some("cargo"); | |
48 | } | |
49 | ||
f20569fa | 50 | let lint = LintData { |
064997fb | 51 | pass: pass.map_or("", String::as_str), |
f20569fa XL |
52 | name: lint_name.expect("`name` argument is validated by clap"), |
53 | category: category.expect("`category` argument is validated by clap"), | |
064997fb | 54 | ty, |
f20569fa XL |
55 | project_root: clippy_project_root(), |
56 | }; | |
57 | ||
3c0e092e XL |
58 | create_lint(&lint, msrv).context("Unable to create lint implementation")?; |
59 | create_test(&lint).context("Unable to create a test for the new lint")?; | |
064997fb FG |
60 | |
61 | if lint.ty.is_none() { | |
62 | add_lint(&lint, msrv).context("Unable to add lint to clippy_lints/src/lib.rs")?; | |
63 | } | |
64 | ||
65 | Ok(()) | |
f20569fa XL |
66 | } |
67 | ||
3c0e092e | 68 | fn create_lint(lint: &LintData<'_>, enable_msrv: bool) -> io::Result<()> { |
064997fb FG |
69 | if let Some(ty) = lint.ty { |
70 | create_lint_for_ty(lint, enable_msrv, ty) | |
71 | } else { | |
72 | let lint_contents = get_lint_file_contents(lint, enable_msrv); | |
73 | let lint_path = format!("clippy_lints/src/{}.rs", lint.name); | |
74 | write_file(lint.project_root.join(&lint_path), lint_contents.as_bytes())?; | |
75 | println!("Generated lint file: `{}`", lint_path); | |
f20569fa | 76 | |
064997fb FG |
77 | Ok(()) |
78 | } | |
f20569fa XL |
79 | } |
80 | ||
cdc7bbd5 | 81 | fn create_test(lint: &LintData<'_>) -> io::Result<()> { |
f20569fa XL |
82 | fn create_project_layout<P: Into<PathBuf>>(lint_name: &str, location: P, case: &str, hint: &str) -> io::Result<()> { |
83 | let mut path = location.into().join(case); | |
84 | fs::create_dir(&path)?; | |
85 | write_file(path.join("Cargo.toml"), get_manifest_contents(lint_name, hint))?; | |
86 | ||
87 | path.push("src"); | |
88 | fs::create_dir(&path)?; | |
89 | let header = format!("// compile-flags: --crate-name={}", lint_name); | |
90 | write_file(path.join("main.rs"), get_test_file_contents(lint_name, Some(&header)))?; | |
91 | ||
92 | Ok(()) | |
93 | } | |
94 | ||
95 | if lint.category == "cargo" { | |
96 | let relative_test_dir = format!("tests/ui-cargo/{}", lint.name); | |
064997fb | 97 | let test_dir = lint.project_root.join(&relative_test_dir); |
f20569fa XL |
98 | fs::create_dir(&test_dir)?; |
99 | ||
100 | create_project_layout(lint.name, &test_dir, "fail", "Content that triggers the lint goes here")?; | |
064997fb FG |
101 | create_project_layout(lint.name, &test_dir, "pass", "This file should not trigger the lint")?; |
102 | ||
103 | println!("Generated test directories: `{relative_test_dir}/pass`, `{relative_test_dir}/fail`"); | |
f20569fa XL |
104 | } else { |
105 | let test_path = format!("tests/ui/{}.rs", lint.name); | |
106 | let test_contents = get_test_file_contents(lint.name, None); | |
064997fb FG |
107 | write_file(lint.project_root.join(&test_path), test_contents)?; |
108 | ||
109 | println!("Generated test file: `{}`", test_path); | |
f20569fa | 110 | } |
064997fb FG |
111 | |
112 | Ok(()) | |
f20569fa XL |
113 | } |
114 | ||
3c0e092e XL |
115 | fn add_lint(lint: &LintData<'_>, enable_msrv: bool) -> io::Result<()> { |
116 | let path = "clippy_lints/src/lib.rs"; | |
117 | let mut lib_rs = fs::read_to_string(path).context("reading")?; | |
118 | ||
119 | let comment_start = lib_rs.find("// add lints here,").expect("Couldn't find comment"); | |
120 | ||
121 | let new_lint = if enable_msrv { | |
122 | format!( | |
f2b60f7d | 123 | "store.register_{lint_pass}_pass(move |{ctor_arg}| Box::new({module_name}::{camel_name}::new(msrv)));\n ", |
3c0e092e | 124 | lint_pass = lint.pass, |
f2b60f7d | 125 | ctor_arg = if lint.pass == "late" { "_" } else { "" }, |
3c0e092e XL |
126 | module_name = lint.name, |
127 | camel_name = to_camel_case(lint.name), | |
128 | ) | |
129 | } else { | |
130 | format!( | |
f2b60f7d | 131 | "store.register_{lint_pass}_pass(|{ctor_arg}| Box::new({module_name}::{camel_name}));\n ", |
3c0e092e | 132 | lint_pass = lint.pass, |
f2b60f7d | 133 | ctor_arg = if lint.pass == "late" { "_" } else { "" }, |
3c0e092e XL |
134 | module_name = lint.name, |
135 | camel_name = to_camel_case(lint.name), | |
136 | ) | |
137 | }; | |
138 | ||
139 | lib_rs.insert_str(comment_start, &new_lint); | |
140 | ||
141 | fs::write(path, lib_rs).context("writing") | |
142 | } | |
143 | ||
f20569fa XL |
144 | fn write_file<P: AsRef<Path>, C: AsRef<[u8]>>(path: P, contents: C) -> io::Result<()> { |
145 | fn inner(path: &Path, contents: &[u8]) -> io::Result<()> { | |
146 | OpenOptions::new() | |
147 | .write(true) | |
148 | .create_new(true) | |
149 | .open(path)? | |
150 | .write_all(contents) | |
151 | } | |
152 | ||
153 | inner(path.as_ref(), contents.as_ref()).context(format!("writing to file: {}", path.as_ref().display())) | |
154 | } | |
155 | ||
156 | fn to_camel_case(name: &str) -> String { | |
157 | name.split('_') | |
158 | .map(|s| { | |
159 | if s.is_empty() { | |
f2b60f7d | 160 | String::new() |
f20569fa XL |
161 | } else { |
162 | [&s[0..1].to_uppercase(), &s[1..]].concat() | |
163 | } | |
164 | }) | |
165 | .collect() | |
166 | } | |
167 | ||
064997fb | 168 | pub(crate) fn get_stabilization_version() -> String { |
04454e1e FG |
169 | fn parse_manifest(contents: &str) -> Option<String> { |
170 | let version = contents | |
171 | .lines() | |
172 | .filter_map(|l| l.split_once('=')) | |
173 | .find_map(|(k, v)| (k.trim() == "version").then(|| v.trim()))?; | |
174 | let Some(("0", version)) = version.get(1..version.len() - 1)?.split_once('.') else { | |
175 | return None; | |
176 | }; | |
177 | let (minor, patch) = version.split_once('.')?; | |
178 | Some(format!( | |
179 | "{}.{}.0", | |
180 | minor.parse::<u32>().ok()?, | |
181 | patch.parse::<u32>().ok()? | |
182 | )) | |
a2a8927a | 183 | } |
04454e1e FG |
184 | let contents = fs::read_to_string("Cargo.toml").expect("Unable to read `Cargo.toml`"); |
185 | parse_manifest(&contents).expect("Unable to find package version in `Cargo.toml`") | |
a2a8927a XL |
186 | } |
187 | ||
f20569fa XL |
188 | fn get_test_file_contents(lint_name: &str, header_commands: Option<&str>) -> String { |
189 | let mut contents = format!( | |
3c0e092e XL |
190 | indoc! {" |
191 | #![warn(clippy::{})] | |
f20569fa | 192 | |
3c0e092e XL |
193 | fn main() {{ |
194 | // test code goes here | |
195 | }} | |
196 | "}, | |
f20569fa XL |
197 | lint_name |
198 | ); | |
199 | ||
200 | if let Some(header) = header_commands { | |
201 | contents = format!("{}\n{}", header, contents); | |
202 | } | |
203 | ||
204 | contents | |
205 | } | |
206 | ||
207 | fn get_manifest_contents(lint_name: &str, hint: &str) -> String { | |
208 | format!( | |
3c0e092e XL |
209 | indoc! {r#" |
210 | # {} | |
f20569fa | 211 | |
3c0e092e XL |
212 | [package] |
213 | name = "{}" | |
214 | version = "0.1.0" | |
215 | publish = false | |
f20569fa | 216 | |
3c0e092e XL |
217 | [workspace] |
218 | "#}, | |
f20569fa XL |
219 | hint, lint_name |
220 | ) | |
221 | } | |
222 | ||
3c0e092e XL |
223 | fn get_lint_file_contents(lint: &LintData<'_>, enable_msrv: bool) -> String { |
224 | let mut result = String::new(); | |
225 | ||
226 | let (pass_type, pass_lifetimes, pass_import, context_import) = match lint.pass { | |
227 | "early" => ("EarlyLintPass", "", "use rustc_ast::ast::*;", "EarlyContext"), | |
228 | "late" => ("LateLintPass", "<'_>", "use rustc_hir::*;", "LateContext"), | |
229 | _ => { | |
230 | unreachable!("`pass_type` should only ever be `early` or `late`!"); | |
231 | }, | |
232 | }; | |
233 | ||
234 | let lint_name = lint.name; | |
235 | let category = lint.category; | |
236 | let name_camel = to_camel_case(lint.name); | |
237 | let name_upper = lint_name.to_uppercase(); | |
238 | ||
239 | result.push_str(&if enable_msrv { | |
240 | format!( | |
241 | indoc! {" | |
242 | use clippy_utils::msrvs; | |
243 | {pass_import} | |
244 | use rustc_lint::{{{context_import}, {pass_type}, LintContext}}; | |
245 | use rustc_semver::RustcVersion; | |
246 | use rustc_session::{{declare_tool_lint, impl_lint_pass}}; | |
247 | ||
248 | "}, | |
249 | pass_type = pass_type, | |
250 | pass_import = pass_import, | |
251 | context_import = context_import, | |
252 | ) | |
253 | } else { | |
254 | format!( | |
255 | indoc! {" | |
256 | {pass_import} | |
257 | use rustc_lint::{{{context_import}, {pass_type}}}; | |
258 | use rustc_session::{{declare_lint_pass, declare_tool_lint}}; | |
259 | ||
260 | "}, | |
261 | pass_import = pass_import, | |
262 | pass_type = pass_type, | |
263 | context_import = context_import | |
264 | ) | |
265 | }); | |
266 | ||
064997fb | 267 | let _ = write!(result, "{}", get_lint_declaration(&name_upper, category)); |
3c0e092e XL |
268 | |
269 | result.push_str(&if enable_msrv { | |
270 | format!( | |
271 | indoc! {" | |
272 | pub struct {name_camel} {{ | |
273 | msrv: Option<RustcVersion>, | |
274 | }} | |
275 | ||
276 | impl {name_camel} {{ | |
277 | #[must_use] | |
278 | pub fn new(msrv: Option<RustcVersion>) -> Self {{ | |
279 | Self {{ msrv }} | |
280 | }} | |
281 | }} | |
282 | ||
283 | impl_lint_pass!({name_camel} => [{name_upper}]); | |
284 | ||
285 | impl {pass_type}{pass_lifetimes} for {name_camel} {{ | |
286 | extract_msrv_attr!({context_import}); | |
287 | }} | |
288 | ||
289 | // TODO: Add MSRV level to `clippy_utils/src/msrvs.rs` if needed. | |
290 | // TODO: Add MSRV test to `tests/ui/min_rust_version_attr.rs`. | |
291 | // TODO: Update msrv config comment in `clippy_lints/src/utils/conf.rs` | |
292 | "}, | |
293 | pass_type = pass_type, | |
294 | pass_lifetimes = pass_lifetimes, | |
295 | name_upper = name_upper, | |
296 | name_camel = name_camel, | |
297 | context_import = context_import, | |
298 | ) | |
299 | } else { | |
300 | format!( | |
301 | indoc! {" | |
302 | declare_lint_pass!({name_camel} => [{name_upper}]); | |
303 | ||
304 | impl {pass_type}{pass_lifetimes} for {name_camel} {{}} | |
305 | "}, | |
306 | pass_type = pass_type, | |
307 | pass_lifetimes = pass_lifetimes, | |
308 | name_upper = name_upper, | |
309 | name_camel = name_camel, | |
310 | ) | |
311 | }); | |
312 | ||
313 | result | |
f20569fa XL |
314 | } |
315 | ||
064997fb FG |
316 | fn get_lint_declaration(name_upper: &str, category: &str) -> String { |
317 | format!( | |
318 | indoc! {r#" | |
319 | declare_clippy_lint! {{ | |
320 | /// ### What it does | |
321 | /// | |
322 | /// ### Why is this bad? | |
323 | /// | |
324 | /// ### Example | |
325 | /// ```rust | |
326 | /// // example code where clippy issues a warning | |
327 | /// ``` | |
328 | /// Use instead: | |
329 | /// ```rust | |
330 | /// // example code which does not raise clippy warning | |
331 | /// ``` | |
332 | #[clippy::version = "{version}"] | |
333 | pub {name_upper}, | |
334 | {category}, | |
335 | "default lint description" | |
336 | }} | |
337 | "#}, | |
338 | version = get_stabilization_version(), | |
339 | name_upper = name_upper, | |
340 | category = category, | |
341 | ) | |
342 | } | |
343 | ||
344 | fn create_lint_for_ty(lint: &LintData<'_>, enable_msrv: bool, ty: &str) -> io::Result<()> { | |
345 | match ty { | |
346 | "cargo" => assert_eq!( | |
347 | lint.category, "cargo", | |
348 | "Lints of type `cargo` must have the `cargo` category" | |
349 | ), | |
350 | _ if lint.category == "cargo" => panic!("Lints of category `cargo` must have the `cargo` type"), | |
351 | _ => {}, | |
352 | } | |
353 | ||
354 | let ty_dir = lint.project_root.join(format!("clippy_lints/src/{}", ty)); | |
355 | assert!( | |
356 | ty_dir.exists() && ty_dir.is_dir(), | |
357 | "Directory `{}` does not exist!", | |
358 | ty_dir.display() | |
359 | ); | |
360 | ||
361 | let lint_file_path = ty_dir.join(format!("{}.rs", lint.name)); | |
362 | assert!( | |
363 | !lint_file_path.exists(), | |
364 | "File `{}` already exists", | |
365 | lint_file_path.display() | |
366 | ); | |
367 | ||
368 | let mod_file_path = ty_dir.join("mod.rs"); | |
369 | let context_import = setup_mod_file(&mod_file_path, lint)?; | |
370 | ||
371 | let name_upper = lint.name.to_uppercase(); | |
372 | let mut lint_file_contents = String::new(); | |
373 | ||
374 | if enable_msrv { | |
375 | let _ = writedoc!( | |
376 | lint_file_contents, | |
377 | r#" | |
378 | use clippy_utils::{{meets_msrv, msrvs}}; | |
379 | use rustc_lint::{{{context_import}, LintContext}}; | |
380 | use rustc_semver::RustcVersion; | |
381 | ||
382 | use super::{name_upper}; | |
383 | ||
384 | // TODO: Adjust the parameters as necessary | |
385 | pub(super) fn check(cx: &{context_import}, msrv: Option<RustcVersion>) {{ | |
386 | if !meets_msrv(msrv, todo!("Add a new entry in `clippy_utils/src/msrvs`")) {{ | |
387 | return; | |
388 | }} | |
389 | todo!(); | |
390 | }} | |
391 | "#, | |
392 | context_import = context_import, | |
393 | name_upper = name_upper, | |
394 | ); | |
395 | } else { | |
396 | let _ = writedoc!( | |
397 | lint_file_contents, | |
398 | r#" | |
399 | use rustc_lint::{{{context_import}, LintContext}}; | |
400 | ||
401 | use super::{name_upper}; | |
402 | ||
403 | // TODO: Adjust the parameters as necessary | |
404 | pub(super) fn check(cx: &{context_import}) {{ | |
405 | todo!(); | |
406 | }} | |
407 | "#, | |
408 | context_import = context_import, | |
409 | name_upper = name_upper, | |
410 | ); | |
411 | } | |
412 | ||
413 | write_file(lint_file_path.as_path(), lint_file_contents)?; | |
414 | println!("Generated lint file: `clippy_lints/src/{}/{}.rs`", ty, lint.name); | |
415 | println!( | |
416 | "Be sure to add a call to `{}::check` in `clippy_lints/src/{}/mod.rs`!", | |
417 | lint.name, ty | |
418 | ); | |
419 | ||
420 | Ok(()) | |
421 | } | |
422 | ||
423 | #[allow(clippy::too_many_lines)] | |
424 | fn setup_mod_file(path: &Path, lint: &LintData<'_>) -> io::Result<&'static str> { | |
425 | use super::update_lints::{match_tokens, LintDeclSearchResult}; | |
426 | use rustc_lexer::TokenKind; | |
427 | ||
428 | let lint_name_upper = lint.name.to_uppercase(); | |
429 | ||
430 | let mut file_contents = fs::read_to_string(path)?; | |
431 | assert!( | |
432 | !file_contents.contains(&lint_name_upper), | |
433 | "Lint `{}` already defined in `{}`", | |
434 | lint.name, | |
435 | path.display() | |
436 | ); | |
437 | ||
438 | let mut offset = 0usize; | |
439 | let mut last_decl_curly_offset = None; | |
440 | let mut lint_context = None; | |
441 | ||
442 | let mut iter = rustc_lexer::tokenize(&file_contents).map(|t| { | |
f2b60f7d | 443 | let range = offset..offset + t.len as usize; |
064997fb FG |
444 | offset = range.end; |
445 | ||
446 | LintDeclSearchResult { | |
447 | token_kind: t.kind, | |
448 | content: &file_contents[range.clone()], | |
449 | range, | |
450 | } | |
451 | }); | |
452 | ||
453 | // Find both the last lint declaration (declare_clippy_lint!) and the lint pass impl | |
454 | while let Some(LintDeclSearchResult { content, .. }) = iter.find(|result| result.token_kind == TokenKind::Ident) { | |
455 | let mut iter = iter | |
456 | .by_ref() | |
457 | .filter(|t| !matches!(t.token_kind, TokenKind::Whitespace | TokenKind::LineComment { .. })); | |
458 | ||
459 | match content { | |
460 | "declare_clippy_lint" => { | |
461 | // matches `!{` | |
462 | match_tokens!(iter, Bang OpenBrace); | |
463 | if let Some(LintDeclSearchResult { range, .. }) = | |
464 | iter.find(|result| result.token_kind == TokenKind::CloseBrace) | |
465 | { | |
466 | last_decl_curly_offset = Some(range.end); | |
467 | } | |
468 | }, | |
469 | "impl" => { | |
470 | let mut token = iter.next(); | |
471 | match token { | |
472 | // matches <'foo> | |
473 | Some(LintDeclSearchResult { | |
474 | token_kind: TokenKind::Lt, | |
475 | .. | |
476 | }) => { | |
477 | match_tokens!(iter, Lifetime { .. } Gt); | |
478 | token = iter.next(); | |
479 | }, | |
480 | None => break, | |
481 | _ => {}, | |
482 | } | |
483 | ||
484 | if let Some(LintDeclSearchResult { | |
485 | token_kind: TokenKind::Ident, | |
486 | content, | |
487 | .. | |
488 | }) = token | |
489 | { | |
490 | // Get the appropriate lint context struct | |
491 | lint_context = match content { | |
492 | "LateLintPass" => Some("LateContext"), | |
493 | "EarlyLintPass" => Some("EarlyContext"), | |
494 | _ => continue, | |
495 | }; | |
496 | } | |
497 | }, | |
498 | _ => {}, | |
499 | } | |
500 | } | |
501 | ||
502 | drop(iter); | |
503 | ||
504 | let last_decl_curly_offset = | |
505 | last_decl_curly_offset.unwrap_or_else(|| panic!("No lint declarations found in `{}`", path.display())); | |
506 | let lint_context = | |
507 | lint_context.unwrap_or_else(|| panic!("No lint pass implementation found in `{}`", path.display())); | |
508 | ||
509 | // Add the lint declaration to `mod.rs` | |
510 | file_contents.replace_range( | |
511 | // Remove the trailing newline, which should always be present | |
512 | last_decl_curly_offset..=last_decl_curly_offset, | |
513 | &format!("\n\n{}", get_lint_declaration(&lint_name_upper, lint.category)), | |
514 | ); | |
515 | ||
516 | // Add the lint to `impl_lint_pass`/`declare_lint_pass` | |
517 | let impl_lint_pass_start = file_contents.find("impl_lint_pass!").unwrap_or_else(|| { | |
518 | file_contents | |
519 | .find("declare_lint_pass!") | |
520 | .unwrap_or_else(|| panic!("failed to find `impl_lint_pass`/`declare_lint_pass`")) | |
521 | }); | |
522 | ||
523 | let mut arr_start = file_contents[impl_lint_pass_start..].find('[').unwrap_or_else(|| { | |
524 | panic!("malformed `impl_lint_pass`/`declare_lint_pass`"); | |
525 | }); | |
526 | ||
527 | arr_start += impl_lint_pass_start; | |
528 | ||
529 | let mut arr_end = file_contents[arr_start..] | |
530 | .find(']') | |
531 | .expect("failed to find `impl_lint_pass` terminator"); | |
532 | ||
533 | arr_end += arr_start; | |
534 | ||
535 | let mut arr_content = file_contents[arr_start + 1..arr_end].to_string(); | |
536 | arr_content.retain(|c| !c.is_whitespace()); | |
537 | ||
538 | let mut new_arr_content = String::new(); | |
539 | for ident in arr_content | |
540 | .split(',') | |
541 | .chain(std::iter::once(&*lint_name_upper)) | |
542 | .filter(|s| !s.is_empty()) | |
543 | { | |
544 | let _ = write!(new_arr_content, "\n {},", ident); | |
545 | } | |
546 | new_arr_content.push('\n'); | |
547 | ||
548 | file_contents.replace_range(arr_start + 1..arr_end, &new_arr_content); | |
549 | ||
550 | // Just add the mod declaration at the top, it'll be fixed by rustfmt | |
551 | file_contents.insert_str(0, &format!("mod {};\n", &lint.name)); | |
552 | ||
553 | let mut file = OpenOptions::new() | |
554 | .write(true) | |
555 | .truncate(true) | |
556 | .open(path) | |
557 | .context(format!("trying to open: `{}`", path.display()))?; | |
558 | file.write_all(file_contents.as_bytes()) | |
559 | .context(format!("writing to file: `{}`", path.display()))?; | |
560 | ||
561 | Ok(lint_context) | |
562 | } | |
563 | ||
f20569fa XL |
564 | #[test] |
565 | fn test_camel_case() { | |
566 | let s = "a_lint"; | |
567 | let s2 = to_camel_case(s); | |
568 | assert_eq!(s2, "ALint"); | |
569 | ||
570 | let name = "a_really_long_new_lint"; | |
571 | let name2 = to_camel_case(name); | |
572 | assert_eq!(name2, "AReallyLongNewLint"); | |
573 | ||
574 | let name3 = "lint__name"; | |
575 | let name4 = to_camel_case(name3); | |
576 | assert_eq!(name4, "LintName"); | |
577 | } |