21 lines
640 B
Rust
21 lines
640 B
Rust
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// Copyright 2016 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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macro_rules! not_an_lvalue {
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($thing:expr) => {
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$thing = 42;
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//~^ ERROR invalid left-hand side expression
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}
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}
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fn main() {
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not_an_lvalue!(99);
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}
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