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<h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>std</a>::<wbr><a class="macro" href=''>debug_assert_ne</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class="rust macro">
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">debug_assert_ne</span> {
( $ ( $ <span class="ident">arg</span> : <span class="ident">tt</span> ) <span class="op">*</span> ) <span class="op">=></span> { ... };
}</pre>
<div class='docblock'><p>Asserts that two expressions are not equal to each other.</p>
<p>On panic, this macro will print the values of the expressions with their
debug representations.</p>
<p>Unlike <code>assert_ne!</code>, <code>debug_assert_ne!</code> statements are only enabled in non
optimized builds by default. An optimized build will omit all
<code>debug_assert_ne!</code> statements unless <code>-C debug-assertions</code> is passed to the
compiler. This makes <code>debug_assert_ne!</code> useful for checks that are too
expensive to be present in a release build but may be helpful during
development.</p>
<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="number">3</span>;
<span class="kw">let</span> <span class="ident">b</span> <span class="op">=</span> <span class="number">2</span>;
<span class="macro">debug_assert_ne</span><span class="macro">!</span>(<span class="ident">a</span>, <span class="ident">b</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Alet%20a%20%3D%203%3B%0Alet%20b%20%3D%202%3B%0Adebug_assert_ne!(a%2C%20b)%3B%0A%7D">Run</a></pre>
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