Emitter 2a: the corpus runner, the canonical serializer and the CommonMark subset

src/result.ts

@@ -0,0 +1,33 @@
+export type ConvertErrorCode =
+  | 'ambiguous-empty-code-block-language'
+  | 'ambiguous-ordered-list-start'
+  | 'not-an-adf-document'
+  | 'reserved-adf-language'
+  | 'unspellable-adjacent-lists'
+  | 'unspellable-code-block-language'
+  | 'unspellable-line-start'
+  | 'unspellable-link-destination'
+  | 'unspellable-link-title'
+  | 'unspellable-mark'
+  | 'unspellable-whitespace'
+  | 'unspelled-block-marks'
+  | 'unspelled-node-attribute'
+  | 'unsupported-document-version'
+  | 'unsupported-heading-level'
+  | 'unsupported-node-shape'
+  | 'unsupported-node-type'
+
+export type ConvertError = {
+  code: ConvertErrorCode
+  message: string
+}
+
+export type Result<T> = { error: ConvertError; ok: false } | { ok: true; value: T }
+
+export function failure<T>(code: ConvertErrorCode, message: string): Result<T> {
+  return { error: { code, message }, ok: false }
+}
+
+export function success<T>(value: T): Result<T> {
+  return { ok: true, value }
+}