1 use crate::tests::{matches_codepattern, string_to_stream, with_error_checking_parse};
4 use rustc_ast::token::{self, Delimiter, Token};
5 use rustc_ast::tokenstream::{DelimSpan, TokenStream, TokenTree};
7 use rustc_ast::{self as ast, PatKind};
8 use rustc_ast_pretty::pprust::item_to_string;
9 use rustc_errors::PResult;
10 use rustc_parse::new_parser_from_source_str;
11 use rustc_parse::parser::ForceCollect;
12 use rustc_session::parse::ParseSess;
13 use rustc_span::create_default_session_globals_then;
14 use rustc_span::source_map::FilePathMapping;
15 use rustc_span::symbol::{kw, sym, Symbol};
16 use rustc_span::{BytePos, FileName, Pos, Span};
18 use std::path::PathBuf;
20 fn sess() -> ParseSess {
21 ParseSess::new(FilePathMapping::empty())
26 /// Returns `Ok(Some(item))` when successful, `Ok(None)` when no item was found, and `Err`
27 /// when a syntax error occurred.
28 fn parse_item_from_source_str(
32 ) -> PResult<'_, Option<P<ast::Item>>> {
33 new_parser_from_source_str(sess, name, source).parse_item(ForceCollect::No)
36 // Produces a `rustc_span::span`.
37 fn sp(a: u32, b: u32) -> Span {
38 Span::with_root_ctxt(BytePos(a), BytePos(b))
41 /// Parses a string, return an expression.
42 fn string_to_expr(source_str: String) -> P<ast::Expr> {
43 with_error_checking_parse(source_str, &sess(), |p| p.parse_expr())
46 /// Parses a string, returns an item.
47 fn string_to_item(source_str: String) -> Option<P<ast::Item>> {
48 with_error_checking_parse(source_str, &sess(), |p| p.parse_item(ForceCollect::No))
53 fn bad_path_expr_1() {
54 create_default_session_globals_then(|| {
55 string_to_expr("::abc::def::return".to_string());
59 // Checks the token-tree-ization of macros.
61 fn string_to_tts_macro() {
62 create_default_session_globals_then(|| {
64 string_to_stream("macro_rules! zip (($a)=>($a))".to_string()).into_trees().collect();
65 let tts: &[TokenTree] = &tts[..];
69 TokenTree::Token(Token { kind: token::Ident(name_macro_rules, false), .. }),
70 TokenTree::Token(Token { kind: token::Not, .. }),
71 TokenTree::Token(Token { kind: token::Ident(name_zip, false), .. }),
72 TokenTree::Delimited(_, macro_delim, macro_tts),
73 ] if name_macro_rules == &kw::MacroRules && name_zip.as_str() == "zip" => {
74 let tts = ¯o_tts.trees().collect::<Vec<_>>();
77 TokenTree::Delimited(_, first_delim, first_tts),
78 TokenTree::Token(Token { kind: token::FatArrow, .. }),
79 TokenTree::Delimited(_, second_delim, second_tts),
80 ] if macro_delim == &Delimiter::Parenthesis => {
81 let tts = &first_tts.trees().collect::<Vec<_>>();
84 TokenTree::Token(Token { kind: token::Dollar, .. }),
85 TokenTree::Token(Token { kind: token::Ident(name, false), .. }),
86 ] if first_delim == &Delimiter::Parenthesis && name.as_str() == "a" => {
88 _ => panic!("value 3: {:?} {:?}", first_delim, first_tts),
90 let tts = &second_tts.trees().collect::<Vec<_>>();
93 TokenTree::Token(Token { kind: token::Dollar, .. }),
94 TokenTree::Token(Token { kind: token::Ident(name, false), .. }),
95 ] if second_delim == &Delimiter::Parenthesis
96 && name.as_str() == "a" => {}
97 _ => panic!("value 4: {:?} {:?}", second_delim, second_tts),
100 _ => panic!("value 2: {:?} {:?}", macro_delim, macro_tts),
103 _ => panic!("value: {:?}", tts),
109 fn string_to_tts_1() {
110 create_default_session_globals_then(|| {
111 let tts = string_to_stream("fn a (b : i32) { b; }".to_string());
113 let expected = TokenStream::new(vec![
114 TokenTree::token(token::Ident(kw::Fn, false), sp(0, 2)).into(),
115 TokenTree::token(token::Ident(Symbol::intern("a"), false), sp(3, 4)).into(),
116 TokenTree::Delimited(
117 DelimSpan::from_pair(sp(5, 6), sp(13, 14)),
118 Delimiter::Parenthesis,
119 TokenStream::new(vec![
120 TokenTree::token(token::Ident(Symbol::intern("b"), false), sp(6, 7)).into(),
121 TokenTree::token(token::Colon, sp(8, 9)).into(),
122 TokenTree::token(token::Ident(sym::i32, false), sp(10, 13)).into(),
127 TokenTree::Delimited(
128 DelimSpan::from_pair(sp(15, 16), sp(20, 21)),
130 TokenStream::new(vec![
131 TokenTree::token(token::Ident(Symbol::intern("b"), false), sp(17, 18)).into(),
132 TokenTree::token(token::Semi, sp(18, 19)).into(),
139 assert_eq!(tts, expected);
145 create_default_session_globals_then(|| {
146 let use_s = "use foo::bar::baz;";
147 let vitem = string_to_item(use_s.to_string()).unwrap();
148 let vitem_s = item_to_string(&vitem);
149 assert_eq!(&vitem_s[..], use_s);
151 let use_s = "use foo::bar as baz;";
152 let vitem = string_to_item(use_s.to_string()).unwrap();
153 let vitem_s = item_to_string(&vitem);
154 assert_eq!(&vitem_s[..], use_s);
159 fn parse_extern_crate() {
160 create_default_session_globals_then(|| {
161 let ex_s = "extern crate foo;";
162 let vitem = string_to_item(ex_s.to_string()).unwrap();
163 let vitem_s = item_to_string(&vitem);
164 assert_eq!(&vitem_s[..], ex_s);
166 let ex_s = "extern crate foo as bar;";
167 let vitem = string_to_item(ex_s.to_string()).unwrap();
168 let vitem_s = item_to_string(&vitem);
169 assert_eq!(&vitem_s[..], ex_s);
173 fn get_spans_of_pat_idents(src: &str) -> Vec<Span> {
174 let item = string_to_item(src.to_string()).unwrap();
176 struct PatIdentVisitor {
179 impl<'a> visit::Visitor<'a> for PatIdentVisitor {
180 fn visit_pat(&mut self, p: &'a ast::Pat) {
182 PatKind::Ident(_, ref ident, _) => {
183 self.spans.push(ident.span.clone());
186 visit::walk_pat(self, p);
191 let mut v = PatIdentVisitor { spans: Vec::new() };
192 visit::walk_item(&mut v, &item);
197 fn span_of_self_arg_pat_idents_are_correct() {
198 create_default_session_globals_then(|| {
200 "impl z { fn a (&self, &myarg: i32) {} }",
201 "impl z { fn a (&mut self, &myarg: i32) {} }",
202 "impl z { fn a (&'a self, &myarg: i32) {} }",
203 "impl z { fn a (self, &myarg: i32) {} }",
204 "impl z { fn a (self: Foo, &myarg: i32) {} }",
208 let spans = get_spans_of_pat_idents(src);
209 let (lo, hi) = (spans[0].lo(), spans[0].hi());
211 "self" == &src[lo.to_usize()..hi.to_usize()],
212 "\"{}\" != \"self\". src=\"{}\"",
213 &src[lo.to_usize()..hi.to_usize()],
222 create_default_session_globals_then(|| {
223 // just make sure that they parse....
224 string_to_expr("3 + 4".to_string());
225 string_to_expr("a::z.froob(b,&(987+3))".to_string());
231 create_default_session_globals_then(|| {
233 "pub fn mk_file_writer(path: &Path, flags: &[FileFlag])
234 -> Result<Box<Writer>, String> {
237 (O_WRONLY | libc::consts::os::extra::O_BINARY) as c_int
241 fn wb() -> c_int { O_WRONLY as c_int }
243 let mut fflags: c_int = wb();
251 fn crlf_doc_comments() {
252 create_default_session_globals_then(|| {
255 let name_1 = FileName::Custom("crlf_source_1".to_string());
256 let source = "/// doc comment\r\nfn foo() {}".to_string();
257 let item = parse_item_from_source_str(name_1, source, &sess).unwrap().unwrap();
258 let doc = item.attrs.iter().filter_map(|at| at.doc_str()).next().unwrap();
259 assert_eq!(doc.as_str(), " doc comment");
261 let name_2 = FileName::Custom("crlf_source_2".to_string());
262 let source = "/// doc comment\r\n/// line 2\r\nfn foo() {}".to_string();
263 let item = parse_item_from_source_str(name_2, source, &sess).unwrap().unwrap();
264 let docs = item.attrs.iter().filter_map(|at| at.doc_str()).collect::<Vec<_>>();
265 let b: &[_] = &[Symbol::intern(" doc comment"), Symbol::intern(" line 2")];
266 assert_eq!(&docs[..], b);
268 let name_3 = FileName::Custom("clrf_source_3".to_string());
269 let source = "/** doc comment\r\n * with CRLF */\r\nfn foo() {}".to_string();
270 let item = parse_item_from_source_str(name_3, source, &sess).unwrap().unwrap();
271 let doc = item.attrs.iter().filter_map(|at| at.doc_str()).next().unwrap();
272 assert_eq!(doc.as_str(), " doc comment\n * with CRLF ");
278 fn parse_expr_from_source_str(
282 ) -> PResult<'_, P<ast::Expr>> {
283 new_parser_from_source_str(sess, name, source).parse_expr()
286 create_default_session_globals_then(|| {
288 let expr = parse_expr_from_source_str(
289 PathBuf::from("foo").into(),
290 "foo!( fn main() { body } )".to_string(),
295 let tts: Vec<_> = match expr.kind {
296 ast::ExprKind::MacCall(ref mac) => mac.args.inner_tokens().into_trees().collect(),
297 _ => panic!("not a macro"),
300 let span = tts.iter().rev().next().unwrap().span();
302 match sess.source_map().span_to_snippet(span) {
303 Ok(s) => assert_eq!(&s[..], "{ body }"),
304 Err(_) => panic!("could not get snippet"),
309 // This tests that when parsing a string (rather than a file) we don't try
310 // and read in a file for a module declaration and just parse a stub.
311 // See `recurse_into_file_modules` in the parser.
313 fn out_of_line_mod() {
314 create_default_session_globals_then(|| {
315 let item = parse_item_from_source_str(
316 PathBuf::from("foo").into(),
317 "mod foo { struct S; mod this_does_not_exist; }".to_owned(),
323 if let ast::ItemKind::Mod(_, ref mod_kind) = item.kind {
324 assert!(matches!(mod_kind, ast::ModKind::Loaded(items, ..) if items.len() == 2));
333 assert_eq!(matches_codepattern("", ""), true);
334 assert_eq!(matches_codepattern("", "a"), false);
335 assert_eq!(matches_codepattern("a", ""), false);
336 assert_eq!(matches_codepattern("a", "a"), true);
337 assert_eq!(matches_codepattern("a b", "a \n\t\r b"), true);
338 assert_eq!(matches_codepattern("a b ", "a \n\t\r b"), true);
339 assert_eq!(matches_codepattern("a b", "a \n\t\r b "), false);
340 assert_eq!(matches_codepattern("a b", "a b"), true);
341 assert_eq!(matches_codepattern("ab", "a b"), false);
342 assert_eq!(matches_codepattern("a b", "ab"), true);
343 assert_eq!(matches_codepattern(" a b", "ab"), true);
347 fn pattern_whitespace() {
348 assert_eq!(matches_codepattern("", "\x0C"), false);
349 assert_eq!(matches_codepattern("a b ", "a \u{0085}\n\t\r b"), true);
350 assert_eq!(matches_codepattern("a b", "a \u{0085}\n\t\r b "), false);
354 fn non_pattern_whitespace() {
355 // These have the property 'White_Space' but not 'Pattern_White_Space'
356 assert_eq!(matches_codepattern("a b", "a\u{2002}b"), false);
357 assert_eq!(matches_codepattern("a b", "a\u{2002}b"), false);
358 assert_eq!(matches_codepattern("\u{205F}a b", "ab"), false);
359 assert_eq!(matches_codepattern("a \u{3000}b", "ab"), false);