Variable DecoderError

Type Declaration

• Readonly_tag: "DecoderError"

• composite: (path: readonly string[], children: List<DecoderError>) => DecoderErrorComposite

• flatten: (e: DecoderError) => List<{ message: string; path: readonly string[] }>

  Walk the error tree and collect every leaf failure as a flat list of {path, message} records. Useful when surfacing errors to a UI that wants one line per problem.

• format: (e: DecoderError) => string

  Render the error tree as a human-readable multi-line string. Paths are dotted (user.address.city); indices are bracketed (tags[0]).

• isComposite: (e: DecoderError) => e is DecoderErrorComposite

• isLeaf: (e: DecoderError) => e is DecoderErrorLeaf

• leaf: (path: readonly string[], message: string, cause?: unknown) => DecoderErrorLeaf

• match: <T>(
      e: DecoderError,
      patterns: {
          Composite: (e: DecoderErrorComposite) => T;
          Leaf: (e: DecoderErrorLeaf) => T;
      },
  ) => T

• prepend: (segment: string, e: DecoderError) => DecoderError

  Prepend a path segment to an error. Used by Decoder.object and Decoder.list to attribute a child decoder's failures to the field / index they were decoded under. Recurses into Composite children so every Leaf in the tree carries its full absolute path.