Enforced immutability: Difference between revisions

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(added Factor)
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=={{header|Factor}}==
Tuple slots may be declared <code>read-only</code>. For example, the <code>range</code> classtuple declares its slots <code>read-only</code>:
<lang factor>TUPLE: range
{ from read-only } { length read-only } { step read-only } ;</lang>
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