25 lines
536 B
Plaintext
25 lines
536 B
Plaintext
== Why is this an issue?
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include::../description.adoc[]
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=== Noncompliant code example
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[source,javascript]
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----
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/(?:)*/ // same as the empty regex, the '*' accomplishes nothing
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/(?:|x)*/ // same as the empty regex, the alternative has no effect
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/(?:x|)*/ // same as 'x*', the empty alternative has no effect
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/(?:x*|y*)*/ // same as 'x*', the first alternative would always match, y* is never tried
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/(?:x?)*/ // same as 'x*'
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/(?:x?)+/ // same as 'x*'
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----
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=== Compliant solution
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[source,javascript]
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----
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/x*/
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----
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