| use crate::tests::{ |
| matches_codepattern, psess, string_to_stream, with_error_checking_parse, |
| with_expected_parse_error, |
| }; |
| |
| use ast::token::IdentIsRaw; |
| use rustc_ast::ptr::P; |
| use rustc_ast::token::{self, Delimiter, Token}; |
| use rustc_ast::tokenstream::{DelimSpacing, DelimSpan, Spacing, TokenStream, TokenTree}; |
| use rustc_ast::visit; |
| use rustc_ast::{self as ast, PatKind}; |
| use rustc_ast_pretty::pprust::item_to_string; |
| use rustc_errors::PResult; |
| use rustc_parse::new_parser_from_source_str; |
| use rustc_parse::parser::ForceCollect; |
| use rustc_session::parse::ParseSess; |
| use rustc_span::create_default_session_globals_then; |
| use rustc_span::symbol::{kw, sym, Symbol}; |
| use rustc_span::{BytePos, FileName, Pos, Span}; |
| use std::path::PathBuf; |
| |
| /// Parses an item. |
| /// |
| /// Returns `Ok(Some(item))` when successful, `Ok(None)` when no item was found, and `Err` |
| /// when a syntax error occurred. |
| fn parse_item_from_source_str( |
| name: FileName, |
| source: String, |
| psess: &ParseSess, |
| ) -> PResult<'_, Option<P<ast::Item>>> { |
| new_parser_from_source_str(psess, name, source).parse_item(ForceCollect::No) |
| } |
| |
| // Produces a `rustc_span::span`. |
| fn sp(a: u32, b: u32) -> Span { |
| Span::with_root_ctxt(BytePos(a), BytePos(b)) |
| } |
| |
| /// Parses a string, return an expression. |
| fn string_to_expr(source_str: String) -> P<ast::Expr> { |
| with_error_checking_parse(source_str, &psess(), |p| p.parse_expr()) |
| } |
| |
| /// Parses a string, returns an item. |
| fn string_to_item(source_str: String) -> Option<P<ast::Item>> { |
| with_error_checking_parse(source_str, &psess(), |p| p.parse_item(ForceCollect::No)) |
| } |
| |
| #[test] |
| fn bad_path_expr_1() { |
| // This should trigger error: expected identifier, found keyword `return` |
| create_default_session_globals_then(|| { |
| with_expected_parse_error( |
| "::abc::def::return", |
| "expected identifier, found keyword `return`", |
| |p| p.parse_expr(), |
| ); |
| }) |
| } |
| |
| // Checks the token-tree-ization of macros. |
| #[test] |
| fn string_to_tts_macro() { |
| create_default_session_globals_then(|| { |
| let stream = string_to_stream("macro_rules! zip (($a)=>($a))".to_string()); |
| let tts = &stream.trees().collect::<Vec<_>>()[..]; |
| |
| match tts { |
| [ |
| TokenTree::Token( |
| Token { kind: token::Ident(name_macro_rules, IdentIsRaw::No), .. }, |
| _, |
| ), |
| TokenTree::Token(Token { kind: token::Not, .. }, _), |
| TokenTree::Token(Token { kind: token::Ident(name_zip, IdentIsRaw::No), .. }, _), |
| TokenTree::Delimited(.., macro_delim, macro_tts), |
| ] if name_macro_rules == &kw::MacroRules && name_zip.as_str() == "zip" => { |
| let tts = ¯o_tts.trees().collect::<Vec<_>>(); |
| match &tts[..] { |
| [ |
| TokenTree::Delimited(.., first_delim, first_tts), |
| TokenTree::Token(Token { kind: token::FatArrow, .. }, _), |
| TokenTree::Delimited(.., second_delim, second_tts), |
| ] if macro_delim == &Delimiter::Parenthesis => { |
| let tts = &first_tts.trees().collect::<Vec<_>>(); |
| match &tts[..] { |
| [ |
| TokenTree::Token(Token { kind: token::Dollar, .. }, _), |
| TokenTree::Token( |
| Token { kind: token::Ident(name, IdentIsRaw::No), .. }, |
| _, |
| ), |
| ] if first_delim == &Delimiter::Parenthesis && name.as_str() == "a" => { |
| } |
| _ => panic!("value 3: {:?} {:?}", first_delim, first_tts), |
| } |
| let tts = &second_tts.trees().collect::<Vec<_>>(); |
| match &tts[..] { |
| [ |
| TokenTree::Token(Token { kind: token::Dollar, .. }, _), |
| TokenTree::Token( |
| Token { kind: token::Ident(name, IdentIsRaw::No), .. }, |
| _, |
| ), |
| ] if second_delim == &Delimiter::Parenthesis |
| && name.as_str() == "a" => {} |
| _ => panic!("value 4: {:?} {:?}", second_delim, second_tts), |
| } |
| } |
| _ => panic!("value 2: {:?} {:?}", macro_delim, macro_tts), |
| } |
| } |
| _ => panic!("value: {:?}", tts), |
| } |
| }) |
| } |
| |
| #[test] |
| fn string_to_tts_1() { |
| create_default_session_globals_then(|| { |
| let tts = string_to_stream("fn a(b: i32) { b; }".to_string()); |
| |
| let expected = TokenStream::new(vec![ |
| TokenTree::token_alone(token::Ident(kw::Fn, IdentIsRaw::No), sp(0, 2)), |
| TokenTree::token_joint_hidden( |
| token::Ident(Symbol::intern("a"), IdentIsRaw::No), |
| sp(3, 4), |
| ), |
| TokenTree::Delimited( |
| DelimSpan::from_pair(sp(4, 5), sp(11, 12)), |
| // `JointHidden` because the `(` is followed immediately by |
| // `b`, `Alone` because the `)` is followed by whitespace. |
| DelimSpacing::new(Spacing::JointHidden, Spacing::Alone), |
| Delimiter::Parenthesis, |
| TokenStream::new(vec![ |
| TokenTree::token_joint( |
| token::Ident(Symbol::intern("b"), IdentIsRaw::No), |
| sp(5, 6), |
| ), |
| TokenTree::token_alone(token::Colon, sp(6, 7)), |
| // `JointHidden` because the `i32` is immediately followed by the `)`. |
| TokenTree::token_joint_hidden( |
| token::Ident(sym::i32, IdentIsRaw::No), |
| sp(8, 11), |
| ), |
| ]) |
| .into(), |
| ), |
| TokenTree::Delimited( |
| DelimSpan::from_pair(sp(13, 14), sp(18, 19)), |
| // First `Alone` because the `{` is followed by whitespace, |
| // second `Alone` because the `}` is followed immediately by |
| // EOF. |
| DelimSpacing::new(Spacing::Alone, Spacing::Alone), |
| Delimiter::Brace, |
| TokenStream::new(vec![ |
| TokenTree::token_joint( |
| token::Ident(Symbol::intern("b"), IdentIsRaw::No), |
| sp(15, 16), |
| ), |
| // `Alone` because the `;` is followed by whitespace. |
| TokenTree::token_alone(token::Semi, sp(16, 17)), |
| ]) |
| .into(), |
| ), |
| ]); |
| |
| assert_eq!(tts, expected); |
| }) |
| } |
| |
| #[test] |
| fn parse_use() { |
| create_default_session_globals_then(|| { |
| let use_s = "use foo::bar::baz;"; |
| let vitem = string_to_item(use_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], use_s); |
| |
| let use_s = "use foo::bar as baz;"; |
| let vitem = string_to_item(use_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], use_s); |
| }) |
| } |
| |
| #[test] |
| fn parse_extern_crate() { |
| create_default_session_globals_then(|| { |
| let ex_s = "extern crate foo;"; |
| let vitem = string_to_item(ex_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], ex_s); |
| |
| let ex_s = "extern crate foo as bar;"; |
| let vitem = string_to_item(ex_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], ex_s); |
| }) |
| } |
| |
| fn get_spans_of_pat_idents(src: &str) -> Vec<Span> { |
| let item = string_to_item(src.to_string()).unwrap(); |
| |
| struct PatIdentVisitor { |
| spans: Vec<Span>, |
| } |
| impl<'a> visit::Visitor<'a> for PatIdentVisitor { |
| fn visit_pat(&mut self, p: &'a ast::Pat) { |
| match &p.kind { |
| PatKind::Ident(_, ident, _) => { |
| self.spans.push(ident.span); |
| } |
| _ => { |
| visit::walk_pat(self, p); |
| } |
| } |
| } |
| } |
| let mut v = PatIdentVisitor { spans: Vec::new() }; |
| visit::walk_item(&mut v, &item); |
| return v.spans; |
| } |
| |
| #[test] |
| fn span_of_self_arg_pat_idents_are_correct() { |
| create_default_session_globals_then(|| { |
| let srcs = [ |
| "impl z { fn a (&self, &myarg: i32) {} }", |
| "impl z { fn a (&mut self, &myarg: i32) {} }", |
| "impl z { fn a (&'a self, &myarg: i32) {} }", |
| "impl z { fn a (self, &myarg: i32) {} }", |
| "impl z { fn a (self: Foo, &myarg: i32) {} }", |
| ]; |
| |
| for src in srcs { |
| let spans = get_spans_of_pat_idents(src); |
| let (lo, hi) = (spans[0].lo(), spans[0].hi()); |
| assert!( |
| "self" == &src[lo.to_usize()..hi.to_usize()], |
| "\"{}\" != \"self\". src=\"{}\"", |
| &src[lo.to_usize()..hi.to_usize()], |
| src |
| ) |
| } |
| }) |
| } |
| |
| #[test] |
| fn parse_exprs() { |
| create_default_session_globals_then(|| { |
| // just make sure that they parse.... |
| string_to_expr("3 + 4".to_string()); |
| string_to_expr("a::z.froob(b,&(987+3))".to_string()); |
| }) |
| } |
| |
| #[test] |
| fn attrs_fix_bug() { |
| create_default_session_globals_then(|| { |
| string_to_item( |
| "pub fn mk_file_writer(path: &Path, flags: &[FileFlag]) |
| -> Result<Box<Writer>, String> { |
| #[cfg(windows)] |
| fn wb() -> c_int { |
| (O_WRONLY | libc::consts::os::extra::O_BINARY) as c_int |
| } |
| |
| #[cfg(unix)] |
| fn wb() -> c_int { O_WRONLY as c_int } |
| |
| let mut fflags: c_int = wb(); |
| }" |
| .to_string(), |
| ); |
| }) |
| } |
| |
| #[test] |
| fn crlf_doc_comments() { |
| create_default_session_globals_then(|| { |
| let psess = psess(); |
| |
| let name_1 = FileName::Custom("crlf_source_1".to_string()); |
| let source = "/// doc comment\r\nfn foo() {}".to_string(); |
| let item = parse_item_from_source_str(name_1, source, &psess).unwrap().unwrap(); |
| let doc = item.attrs.iter().filter_map(|at| at.doc_str()).next().unwrap(); |
| assert_eq!(doc.as_str(), " doc comment"); |
| |
| let name_2 = FileName::Custom("crlf_source_2".to_string()); |
| let source = "/// doc comment\r\n/// line 2\r\nfn foo() {}".to_string(); |
| let item = parse_item_from_source_str(name_2, source, &psess).unwrap().unwrap(); |
| let docs = item.attrs.iter().filter_map(|at| at.doc_str()).collect::<Vec<_>>(); |
| let b: &[_] = &[Symbol::intern(" doc comment"), Symbol::intern(" line 2")]; |
| assert_eq!(&docs[..], b); |
| |
| let name_3 = FileName::Custom("clrf_source_3".to_string()); |
| let source = "/** doc comment\r\n * with CRLF */\r\nfn foo() {}".to_string(); |
| let item = parse_item_from_source_str(name_3, source, &psess).unwrap().unwrap(); |
| let doc = item.attrs.iter().filter_map(|at| at.doc_str()).next().unwrap(); |
| assert_eq!(doc.as_str(), " doc comment\n * with CRLF "); |
| }); |
| } |
| |
| #[test] |
| fn ttdelim_span() { |
| fn parse_expr_from_source_str( |
| name: FileName, |
| source: String, |
| psess: &ParseSess, |
| ) -> PResult<'_, P<ast::Expr>> { |
| new_parser_from_source_str(psess, name, source).parse_expr() |
| } |
| |
| create_default_session_globals_then(|| { |
| let psess = psess(); |
| let expr = parse_expr_from_source_str( |
| PathBuf::from("foo").into(), |
| "foo!( fn main() { body } )".to_string(), |
| &psess, |
| ) |
| .unwrap(); |
| |
| let ast::ExprKind::MacCall(mac) = &expr.kind else { panic!("not a macro") }; |
| let span = mac.args.tokens.trees().last().unwrap().span(); |
| |
| match psess.source_map().span_to_snippet(span) { |
| Ok(s) => assert_eq!(&s[..], "{ body }"), |
| Err(_) => panic!("could not get snippet"), |
| } |
| }); |
| } |
| |
| // This tests that when parsing a string (rather than a file) we don't try |
| // and read in a file for a module declaration and just parse a stub. |
| // See `recurse_into_file_modules` in the parser. |
| #[test] |
| fn out_of_line_mod() { |
| create_default_session_globals_then(|| { |
| let item = parse_item_from_source_str( |
| PathBuf::from("foo").into(), |
| "mod foo { struct S; mod this_does_not_exist; }".to_owned(), |
| &psess(), |
| ) |
| .unwrap() |
| .unwrap(); |
| |
| let ast::ItemKind::Mod(_, mod_kind) = &item.kind else { panic!() }; |
| assert!(matches!(mod_kind, ast::ModKind::Loaded(items, ..) if items.len() == 2)); |
| }); |
| } |
| |
| #[test] |
| fn eqmodws() { |
| assert_eq!(matches_codepattern("", ""), true); |
| assert_eq!(matches_codepattern("", "a"), false); |
| assert_eq!(matches_codepattern("a", ""), false); |
| assert_eq!(matches_codepattern("a", "a"), true); |
| assert_eq!(matches_codepattern("a b", "a \n\t\r b"), true); |
| assert_eq!(matches_codepattern("a b ", "a \n\t\r b"), true); |
| assert_eq!(matches_codepattern("a b", "a \n\t\r b "), false); |
| assert_eq!(matches_codepattern("a b", "a b"), true); |
| assert_eq!(matches_codepattern("ab", "a b"), false); |
| assert_eq!(matches_codepattern("a b", "ab"), true); |
| assert_eq!(matches_codepattern(" a b", "ab"), true); |
| } |
| |
| #[test] |
| fn pattern_whitespace() { |
| assert_eq!(matches_codepattern("", "\x0C"), false); |
| assert_eq!(matches_codepattern("a b ", "a \u{0085}\n\t\r b"), true); |
| assert_eq!(matches_codepattern("a b", "a \u{0085}\n\t\r b "), false); |
| } |
| |
| #[test] |
| fn non_pattern_whitespace() { |
| // These have the property 'White_Space' but not 'Pattern_White_Space' |
| assert_eq!(matches_codepattern("a b", "a\u{2002}b"), false); |
| assert_eq!(matches_codepattern("a b", "a\u{2002}b"), false); |
| assert_eq!(matches_codepattern("\u{205F}a b", "ab"), false); |
| assert_eq!(matches_codepattern("a \u{3000}b", "ab"), false); |
| } |
