lazy

DDataParser.lazy(() => parser) lets you describe recursive structures (trees, categories, menus, etc.) by deferring parser resolution. The getter is evaluated only at runtime, which avoids circular references.

Interactive example

Parameters

• getter: function that returns the real parser (often an object that itself contains the lazy).
• checkers: checkerRefine applied on the complete structure (e.g. limit depth, check global invariants).
• errorMessage: custom message if the input does not match the resolved schema.

Return value

A DataParserLazy. schema.parse(data) returns DEither.success<Output> when the value satisfies the resolved parser, otherwise DEither.error<DataParserError> with the exact path even in recursion cases.

Other examples

Extended mode

See also

• object - Parser for objects
• bigint - Parser for bigint integers