gof-state-subclasses-often-singletons

Status: IN

TCPState subclasses in the State pattern example maintain no local state, so they can be shared — each is a Singleton with a static Instance() operation.

Source: entries/2026/06/17/gof-oo-chunk-20.md

Depended on by

• controlled-sharing-meta-pattern
• singleton-as-cross-category-enabling-infrastructure
• singleton-cross-category-sharing-infrastructure
• singleton-pervasive-instance-governance-across-categories

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