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optional_arraykey_to_int_cast_for_switch

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

Do a modification on the switched value

namespace HH\Lib\Legacy_FIXME;

function optional_arraykey_to_int_cast_for_switch(
  ?arraykey $value,
): int;

This is in the case where the switched expr is an ?arraykey

Parameters​

  • ?arraykey $value

Returns​

  • int