Type Alias: X12FatalCode

X12FatalCode = typeof FATAL_CODES[keyof typeof FATAL_CODES]

Discriminant type for X12ParseError.code. Narrowing a caught error by this code lets consumers write exhaustive switch blocks (enabled by the switch-exhaustiveness-check lint rule) and guarantees a typo-free comparison against the FATAL_CODES registry.

Example

import type { X12FatalCode } from "@cosyte/x12";
function describe(code: X12FatalCode): string {
  switch (code) {
    case "X12_EMPTY_INPUT":
      return "input was empty";
    case "X12_NO_ISA_HEADER":
      return "missing ISA";
    case "X12_ISA_TOO_SHORT":
      return "ISA truncated";
    case "X12_INVALID_DELIMITERS":
      return "bad ISA delimiters";
  }
}