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ffp_json_dfs

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.

namespace HH\ExperimentalParserUtils;

function ffp_json_dfs(
  mixed $json,
  bool $right,
  (function(varray_or_darray): ?varray_or_darray) $predicate,
  (function(varray_or_darray): bool) $skip_node,
): ?varray_or_darray;

Parameters​

  • mixed $json
  • bool $right
  • (function(varray_or_darray): ?varray_or_darray) $predicate
  • (function(varray_or_darray): bool) $skip_node

Returns​

  • ?varray_or_darray