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19 lines
590 B
HTML
19 lines
590 B
HTML
<html>
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<body>
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Reports back references that will not be resolvable at runtime.
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This means that the back reference can never match anything.
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A back reference will not be resolvable when the group is defined after the back reference,
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or if the group is defined in a different branch of an alternation.
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<p><b>Example of a group defined after its back reference:</b></p>
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<pre><code>
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\1(abc)
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</code></pre>
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<p><b>Example of a group and a back reference in different branches:</b></p>
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<pre><code>
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a(b)c|(xy)\1z
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</code></pre>
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<!-- tooltip end -->
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<p><small>New in 2022.1</small>
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</body>
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</html> |