ddb2466f6a
followed by a semicolon.
This allows code like `vec![1i, 2, 3].len();` to work.
This breaks code that uses macros as statements without putting
semicolons after them, such as:
fn main() {
...
assert!(a == b)
assert!(c == d)
println(...);
}
It also breaks code that uses macros as items without semicolons:
local_data_key!(foo)
fn main() {
println("hello world")
}
Add semicolons to fix this code. Those two examples can be fixed as
follows:
fn main() {
...
assert!(a == b);
assert!(c == d);
println(...);
}
local_data_key!(foo);
fn main() {
println("hello world")
}
RFC #378.
Closes #18635.
[breaking-change]
32 lines
895 B
Rust
32 lines
895 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(macro_rules)]
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macro_rules! test ( ($nm:ident,
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#[$a:meta],
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$i:item) => (mod $nm { #![$a] $i }); );
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test!(a,
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#[cfg(qux)],
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pub fn bar() { });
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test!(b,
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#[cfg(not(qux))],
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pub fn bar() { });
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#[qux]
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fn main() {
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a::bar();
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//~^ ERROR failed to resolve. Use of undeclared type or module `a`
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//~^^ ERROR unresolved name `a::bar`
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b::bar();
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}
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