1 use crate::tests::string_to_stream;
4 use rustc_ast::tokenstream::{TokenStream, TokenStreamBuilder, TokenTree};
5 use rustc_ast::with_default_session_globals;
6 use rustc_span::{BytePos, Span, Symbol};
7 use smallvec::smallvec;
9 fn string_to_ts(string: &str) -> TokenStream {
10 string_to_stream(string.to_owned())
13 fn sp(a: u32, b: u32) -> Span {
14 Span::with_root_ctxt(BytePos(a), BytePos(b))
19 with_default_session_globals(|| {
20 let test_res = string_to_ts("foo::bar::baz");
21 let test_fst = string_to_ts("foo::bar");
22 let test_snd = string_to_ts("::baz");
23 let eq_res = TokenStream::from_streams(smallvec![test_fst, test_snd]);
24 assert_eq!(test_res.trees().count(), 5);
25 assert_eq!(eq_res.trees().count(), 5);
26 assert_eq!(test_res.eq_unspanned(&eq_res), true);
31 fn test_to_from_bijection() {
32 with_default_session_globals(|| {
33 let test_start = string_to_ts("foo::bar(baz)");
34 let test_end = test_start.trees().collect();
35 assert_eq!(test_start, test_end)
41 with_default_session_globals(|| {
42 let test_res = string_to_ts("foo");
43 let test_eqs = string_to_ts("foo");
44 assert_eq!(test_res, test_eqs)
50 with_default_session_globals(|| {
51 let test_res = string_to_ts("::bar::baz");
52 let test_eqs = string_to_ts("::bar::baz");
53 assert_eq!(test_res, test_eqs)
59 with_default_session_globals(|| {
60 let test_res = string_to_ts("");
61 let test_eqs = string_to_ts("");
62 assert_eq!(test_res, test_eqs)
68 with_default_session_globals(|| {
69 let test_res = string_to_ts("::bar::baz");
70 let test_eqs = string_to_ts("bar::baz");
71 assert_eq!(test_res == test_eqs, false)
77 with_default_session_globals(|| {
78 let test_res = string_to_ts("(bar,baz)");
79 let test_eqs = string_to_ts("bar,baz");
80 assert_eq!(test_res == test_eqs, false)
86 with_default_session_globals(|| {
87 let test0: TokenStream = Vec::<TokenTree>::new().into_iter().collect();
88 let test1: TokenStream =
89 TokenTree::token(token::Ident(Symbol::intern("a"), false), sp(0, 1)).into();
90 let test2 = string_to_ts("foo(bar::baz)");
92 assert_eq!(test0.is_empty(), true);
93 assert_eq!(test1.is_empty(), false);
94 assert_eq!(test2.is_empty(), false);
100 with_default_session_globals(|| {
101 let mut builder = TokenStreamBuilder::new();
102 builder.push(TokenTree::token(token::Dot, sp(0, 1)).joint());
103 builder.push(TokenTree::token(token::Dot, sp(1, 2)).joint());
104 builder.push(TokenTree::token(token::Dot, sp(2, 3)));
105 let stream = builder.build();
106 assert!(stream.eq_unspanned(&string_to_ts("...")));
107 assert_eq!(stream.trees().count(), 1);