"one of" is an alias for "either" (#514)

tc39 · Jan 24, 2023 · 6ec8414 · 6ec8414
1 parent 5d1f242
commit 6ec8414
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diff --git a/src/type-parser.ts b/src/type-parser.ts
@@ -169,7 +169,7 @@ export class TypeParser {
  };
  }
  }
- if (this.eat(/^either\b/i)) {
+ if (this.eat(/^(?:either|one of)\b/i)) {
  let nextFieldIsLast = false;
  const unionTypes = [];
  while (true) {

diff --git a/test/type-parser.js b/test/type-parser.js
@@ -158,6 +158,24 @@ describe('type parsing', () => {
  ],
  });
 
+ assert.deepStrictEqual(TypeParser.parse(`one of X, Y, or Z`), {
+ kind: 'union',
+ types: [
+ {
+ kind: 'opaque',
+ type: 'X',
+ },
+ {
+ kind: 'opaque',
+ type: 'Y',
+ },
+ {
+ kind: 'opaque',
+ type: 'Z',
+ },
+ ],
+ });
+
  assert.deepStrictEqual(TypeParser.parse(`a List`), {
  kind: 'list',
  elements: null,