1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream, TokenTree};
use std::iter::{self, FromIterator};
#[test]
fn test_fmt_group() {
let ident = Ident::new("x", Span::call_site());
let inner = TokenStream::from_iter(iter::once(TokenTree::Ident(ident)));
let parens_empty = Group::new(Delimiter::Parenthesis, TokenStream::new());
let parens_nonempty = Group::new(Delimiter::Parenthesis, inner.clone());
let brackets_empty = Group::new(Delimiter::Bracket, TokenStream::new());
let brackets_nonempty = Group::new(Delimiter::Bracket, inner.clone());
let braces_empty = Group::new(Delimiter::Brace, TokenStream::new());
let braces_nonempty = Group::new(Delimiter::Brace, inner.clone());
let none_empty = Group::new(Delimiter::None, TokenStream::new());
let none_nonempty = Group::new(Delimiter::None, inner.clone());
// Matches libproc_macro.
assert_eq!("()", parens_empty.to_string());
assert_eq!("(x)", parens_nonempty.to_string());
assert_eq!("[]", brackets_empty.to_string());
assert_eq!("[x]", brackets_nonempty.to_string());
assert_eq!("{ }", braces_empty.to_string());
assert_eq!("{ x }", braces_nonempty.to_string());
assert_eq!("", none_empty.to_string());
assert_eq!("x", none_nonempty.to_string());
}
|
