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]
39 lines
1.0 KiB
Rust
39 lines
1.0 KiB
Rust
// Copyright 2013 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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// after fixing #9384 and implementing hygiene for match bindings,
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// this now fails because the insertion of the 'y' into the match
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// doesn't cause capture. Making this macro hygienic (as I've done)
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// could very well make this test case completely pointless....
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enum T {
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A(int),
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B(uint)
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}
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macro_rules! test(
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($id:ident, $e:expr) => (
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fn foo(t: T) -> int {
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match t {
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T::A($id) => $e,
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T::B($id) => $e
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}
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}
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)
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);
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test!(y, 10 + (y as int));
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pub fn main() {
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foo(T::A(20));
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}
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