i have pattern:
/^(?:{?[a-z0-9\-_]+\??}?\/)+$/ now these strings match pattern
user/1/modify/ user/{id}/modify/ user/{id?}/modify/ it's ok, pattern match
user/{id?/modify/ if left curly brace start must end right. tried lookahead dont't know right way.
this should work:
^(?:(?:{\w+\??}|\w+)\/)+$ https://regex101.com/r/yo3pa5/1
it tries match in set [a-za-z0-9_] followed optional ? inside {}s, , tries match same set without {}s (and optional ?, can add in), followed /. way won't allow unclosed braces.
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