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
43
44
45
46
|
// Some non-controversial subset of ambiguities "modern macro name" vs "macro_rules"
// is disambiguated to mitigate regressions from macro modularization.
// Scoping for `macro_rules` behaves like scoping for `let` at module level, in general.
#![feature(decl_macro)]
fn same_unnamed_mod() {
macro m() { 0 }
macro_rules! m { () => (()) }
m!() // OK
}
fn nested_unnamed_mod() {
macro m() { 0 }
{
macro_rules! m { () => (()) }
m!() // OK
}
}
fn nested_unnamed_mod_fail() {
macro_rules! m { () => (()) }
{
macro m() { 0 }
m!() //~ ERROR `m` is ambiguous
}
}
fn nexted_named_mod_fail() {
macro m() { 0 }
#[macro_use]
mod inner {
macro_rules! m { () => (()) }
}
m!() //~ ERROR `m` is ambiguous
}
fn main() {}
|
