blob: 08967b82531c9500b4703d069475dc2914996514 (
plain)
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
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// Tests that `?` is a Kleene op and not a macro separator in the 2015 edition.
//@ edition:2015
macro_rules! foo {
($(a)?) => {};
}
// The Kleene op `?` does not admit a separator before it.
macro_rules! baz {
($(a),?) => {}; //~ERROR the `?` macro repetition operator
}
macro_rules! barplus {
($(a)?+) => {}; // ok. matches "a+" and "+"
}
macro_rules! barstar {
($(a)?*) => {}; // ok. matches "a*" and "*"
}
pub fn main() {
foo!();
foo!(a);
foo!(a?); //~ ERROR no rules expected `?`
foo!(a?a); //~ ERROR no rules expected `?`
foo!(a?a?a); //~ ERROR no rules expected `?`
barplus!(); //~ERROR unexpected end of macro invocation
barplus!(a); //~ERROR unexpected end of macro invocation
barplus!(a?); //~ ERROR no rules expected `?`
barplus!(a?a); //~ ERROR no rules expected `?`
barplus!(a+);
barplus!(+);
barstar!(); //~ERROR unexpected end of macro invocation
barstar!(a); //~ERROR unexpected end of macro invocation
barstar!(a?); //~ ERROR no rules expected `?`
barstar!(a?a); //~ ERROR no rules expected `?`
barstar!(a*);
barstar!(*);
}
|
