Function expect

packages/codemirror-graphql/src/utils/jsonParse.ts:139–156

(str: string)

}

function expect(str: string) {
  if (kind === str) {
    lex();
    return;
  }

  let found;
  if (kind === 'EOF') {
    found = '[end of file]';
  } else if (end - start > 1) {
    found = '`' + string.slice(start, end) + '`';
  } else {
    const match = string.slice(start).match(/^.+?\b/);
    found = '`' + (match ? match[0] : string[start]) + '`';
  }

  throw syntaxError(`Expected ${str} but found ${found}.`);
}

type SyntaxErrorPosition = { start: number; end: number };