3 use crate::ast::{self, Name, PatKind};
4 use crate::attr::first_attr_value_str_by_name;
5 use crate::parse::{ParseSess, PResult};
6 use crate::parse::new_parser_from_source_str;
7 use crate::parse::token::Token;
8 use crate::print::pprust::item_to_string;
10 use crate::source_map::FilePathMapping;
11 use crate::symbol::{kw, sym};
12 use crate::tests::{matches_codepattern, string_to_stream, with_error_checking_parse};
13 use crate::tokenstream::{DelimSpan, TokenTree, TokenStream};
14 use crate::with_default_globals;
15 use syntax_pos::{Span, BytePos, Pos};
17 use std::path::PathBuf;
21 /// Returns `Ok(Some(item))` when successful, `Ok(None)` when no item was found, and `Err`
22 /// when a syntax error occurred.
23 fn parse_item_from_source_str(name: FileName, source: String, sess: &ParseSess)
24 -> PResult<'_, Option<P<ast::Item>>> {
25 new_parser_from_source_str(sess, name, source).parse_item()
28 // Produces a `syntax_pos::span`.
29 fn sp(a: u32, b: u32) -> Span {
30 Span::with_root_ctxt(BytePos(a), BytePos(b))
33 /// Parses a string, return an expression.
34 fn string_to_expr(source_str : String) -> P<ast::Expr> {
35 let ps = ParseSess::new(FilePathMapping::empty());
36 with_error_checking_parse(source_str, &ps, |p| {
41 /// Parses a string, returns an item.
42 fn string_to_item(source_str : String) -> Option<P<ast::Item>> {
43 let ps = ParseSess::new(FilePathMapping::empty());
44 with_error_checking_parse(source_str, &ps, |p| {
50 #[test] fn bad_path_expr_1() {
51 with_default_globals(|| {
52 string_to_expr("::abc::def::return".to_string());
56 // Checks the token-tree-ization of macros.
58 fn string_to_tts_macro () {
59 with_default_globals(|| {
61 string_to_stream("macro_rules! zip (($a)=>($a))".to_string()).trees().collect();
62 let tts: &[TokenTree] = &tts[..];
66 TokenTree::Token(Token { kind: token::Ident(name_macro_rules, false), .. }),
67 TokenTree::Token(Token { kind: token::Not, .. }),
68 TokenTree::Token(Token { kind: token::Ident(name_zip, false), .. }),
69 TokenTree::Delimited(_, macro_delim, macro_tts)
71 if name_macro_rules == &sym::macro_rules && name_zip.as_str() == "zip" => {
72 let tts = ¯o_tts.trees().collect::<Vec<_>>();
75 TokenTree::Delimited(_, first_delim, first_tts),
76 TokenTree::Token(Token { kind: token::FatArrow, .. }),
77 TokenTree::Delimited(_, second_delim, second_tts),
79 if macro_delim == &token::Paren => {
80 let tts = &first_tts.trees().collect::<Vec<_>>();
83 TokenTree::Token(Token { kind: token::Dollar, .. }),
84 TokenTree::Token(Token { kind: token::Ident(name, false), .. }),
86 if first_delim == &token::Paren && name.as_str() == "a" => {},
87 _ => panic!("value 3: {:?} {:?}", first_delim, first_tts),
89 let tts = &second_tts.trees().collect::<Vec<_>>();
92 TokenTree::Token(Token { kind: token::Dollar, .. }),
93 TokenTree::Token(Token { kind: token::Ident(name, false), .. }),
95 if second_delim == &token::Paren && name.as_str() == "a" => {},
96 _ => panic!("value 4: {:?} {:?}", second_delim, second_tts),
99 _ => panic!("value 2: {:?} {:?}", macro_delim, macro_tts),
102 _ => panic!("value: {:?}",tts),
108 fn string_to_tts_1() {
109 with_default_globals(|| {
110 let tts = string_to_stream("fn a (b : i32) { b; }".to_string());
112 let expected = TokenStream::new(vec![
113 TokenTree::token(token::Ident(kw::Fn, false), sp(0, 2)).into(),
114 TokenTree::token(token::Ident(Name::intern("a"), false), sp(3, 4)).into(),
115 TokenTree::Delimited(
116 DelimSpan::from_pair(sp(5, 6), sp(13, 14)),
117 token::DelimToken::Paren,
118 TokenStream::new(vec![
119 TokenTree::token(token::Ident(Name::intern("b"), false), sp(6, 7)).into(),
120 TokenTree::token(token::Colon, sp(8, 9)).into(),
121 TokenTree::token(token::Ident(sym::i32, false), sp(10, 13)).into(),
124 TokenTree::Delimited(
125 DelimSpan::from_pair(sp(15, 16), sp(20, 21)),
126 token::DelimToken::Brace,
127 TokenStream::new(vec![
128 TokenTree::token(token::Ident(Name::intern("b"), false), sp(17, 18)).into(),
129 TokenTree::token(token::Semi, sp(18, 19)).into(),
134 assert_eq!(tts, expected);
138 #[test] fn parse_use() {
139 with_default_globals(|| {
140 let use_s = "use foo::bar::baz;";
141 let vitem = string_to_item(use_s.to_string()).unwrap();
142 let vitem_s = item_to_string(&vitem);
143 assert_eq!(&vitem_s[..], use_s);
145 let use_s = "use foo::bar as baz;";
146 let vitem = string_to_item(use_s.to_string()).unwrap();
147 let vitem_s = item_to_string(&vitem);
148 assert_eq!(&vitem_s[..], use_s);
152 #[test] fn parse_extern_crate() {
153 with_default_globals(|| {
154 let ex_s = "extern crate foo;";
155 let vitem = string_to_item(ex_s.to_string()).unwrap();
156 let vitem_s = item_to_string(&vitem);
157 assert_eq!(&vitem_s[..], ex_s);
159 let ex_s = "extern crate foo as bar;";
160 let vitem = string_to_item(ex_s.to_string()).unwrap();
161 let vitem_s = item_to_string(&vitem);
162 assert_eq!(&vitem_s[..], ex_s);
166 fn get_spans_of_pat_idents(src: &str) -> Vec<Span> {
167 let item = string_to_item(src.to_string()).unwrap();
169 struct PatIdentVisitor {
172 impl<'a> crate::visit::Visitor<'a> for PatIdentVisitor {
173 fn visit_pat(&mut self, p: &'a ast::Pat) {
175 PatKind::Ident(_ , ref ident, _) => {
176 self.spans.push(ident.span.clone());
179 crate::visit::walk_pat(self, p);
184 let mut v = PatIdentVisitor { spans: Vec::new() };
185 crate::visit::walk_item(&mut v, &item);
189 #[test] fn span_of_self_arg_pat_idents_are_correct() {
190 with_default_globals(|| {
192 let srcs = ["impl z { fn a (&self, &myarg: i32) {} }",
193 "impl z { fn a (&mut self, &myarg: i32) {} }",
194 "impl z { fn a (&'a self, &myarg: i32) {} }",
195 "impl z { fn a (self, &myarg: i32) {} }",
196 "impl z { fn a (self: Foo, &myarg: i32) {} }",
200 let spans = get_spans_of_pat_idents(src);
201 let (lo, hi) = (spans[0].lo(), spans[0].hi());
202 assert!("self" == &src[lo.to_usize()..hi.to_usize()],
203 "\"{}\" != \"self\". src=\"{}\"",
204 &src[lo.to_usize()..hi.to_usize()], src)
209 #[test] fn parse_exprs () {
210 with_default_globals(|| {
211 // just make sure that they parse....
212 string_to_expr("3 + 4".to_string());
213 string_to_expr("a::z.froob(b,&(987+3))".to_string());
217 #[test] fn attrs_fix_bug () {
218 with_default_globals(|| {
219 string_to_item("pub fn mk_file_writer(path: &Path, flags: &[FileFlag])
220 -> Result<Box<Writer>, String> {
223 (O_WRONLY | libc::consts::os::extra::O_BINARY) as c_int
227 fn wb() -> c_int { O_WRONLY as c_int }
229 let mut fflags: c_int = wb();
234 #[test] fn crlf_doc_comments() {
235 with_default_globals(|| {
236 let sess = ParseSess::new(FilePathMapping::empty());
238 let name_1 = FileName::Custom("crlf_source_1".to_string());
239 let source = "/// doc comment\r\nfn foo() {}".to_string();
240 let item = parse_item_from_source_str(name_1, source, &sess)
242 let doc = first_attr_value_str_by_name(&item.attrs, sym::doc).unwrap();
243 assert_eq!(doc.as_str(), "/// doc comment");
245 let name_2 = FileName::Custom("crlf_source_2".to_string());
246 let source = "/// doc comment\r\n/// line 2\r\nfn foo() {}".to_string();
247 let item = parse_item_from_source_str(name_2, source, &sess)
249 let docs = item.attrs.iter().filter(|a| a.path == sym::doc)
250 .map(|a| a.value_str().unwrap().to_string()).collect::<Vec<_>>();
251 let b: &[_] = &["/// doc comment".to_string(), "/// line 2".to_string()];
252 assert_eq!(&docs[..], b);
254 let name_3 = FileName::Custom("clrf_source_3".to_string());
255 let source = "/** doc comment\r\n * with CRLF */\r\nfn foo() {}".to_string();
256 let item = parse_item_from_source_str(name_3, source, &sess).unwrap().unwrap();
257 let doc = first_attr_value_str_by_name(&item.attrs, sym::doc).unwrap();
258 assert_eq!(doc.as_str(), "/** doc comment\n * with CRLF */");
264 fn parse_expr_from_source_str(
265 name: FileName, source: String, sess: &ParseSess
266 ) -> PResult<'_, P<ast::Expr>> {
267 new_parser_from_source_str(sess, name, source).parse_expr()
270 with_default_globals(|| {
271 let sess = ParseSess::new(FilePathMapping::empty());
272 let expr = parse_expr_from_source_str(PathBuf::from("foo").into(),
273 "foo!( fn main() { body } )".to_string(), &sess).unwrap();
275 let tts: Vec<_> = match expr.kind {
276 ast::ExprKind::Mac(ref mac) => mac.stream().trees().collect(),
277 _ => panic!("not a macro"),
280 let span = tts.iter().rev().next().unwrap().span();
282 match sess.source_map().span_to_snippet(span) {
283 Ok(s) => assert_eq!(&s[..], "{ body }"),
284 Err(_) => panic!("could not get snippet"),
289 // This tests that when parsing a string (rather than a file) we don't try
290 // and read in a file for a module declaration and just parse a stub.
291 // See `recurse_into_file_modules` in the parser.
293 fn out_of_line_mod() {
294 with_default_globals(|| {
295 let sess = ParseSess::new(FilePathMapping::empty());
296 let item = parse_item_from_source_str(
297 PathBuf::from("foo").into(),
298 "mod foo { struct S; mod this_does_not_exist; }".to_owned(),
302 if let ast::ItemKind::Mod(ref m) = item.kind {
303 assert!(m.items.len() == 2);
312 assert_eq!(matches_codepattern("",""),true);
313 assert_eq!(matches_codepattern("","a"),false);
314 assert_eq!(matches_codepattern("a",""),false);
315 assert_eq!(matches_codepattern("a","a"),true);
316 assert_eq!(matches_codepattern("a b","a \n\t\r b"),true);
317 assert_eq!(matches_codepattern("a b ","a \n\t\r b"),true);
318 assert_eq!(matches_codepattern("a b","a \n\t\r b "),false);
319 assert_eq!(matches_codepattern("a b","a b"),true);
320 assert_eq!(matches_codepattern("ab","a b"),false);
321 assert_eq!(matches_codepattern("a b","ab"),true);
322 assert_eq!(matches_codepattern(" a b","ab"),true);
326 fn pattern_whitespace() {
327 assert_eq!(matches_codepattern("","\x0C"), false);
328 assert_eq!(matches_codepattern("a b ","a \u{0085}\n\t\r b"),true);
329 assert_eq!(matches_codepattern("a b","a \u{0085}\n\t\r b "),false);
333 fn non_pattern_whitespace() {
334 // These have the property 'White_Space' but not 'Pattern_White_Space'
335 assert_eq!(matches_codepattern("a b","a\u{2002}b"), false);
336 assert_eq!(matches_codepattern("a b","a\u{2002}b"), false);
337 assert_eq!(matches_codepattern("\u{205F}a b","ab"), false);
338 assert_eq!(matches_codepattern("a \u{3000}b","ab"), false);