Method parseLiteral

packages/icu-messageformat-parser/parser.ts:395–432

(
    nestingLevel: number,
    parentArgType: ArgType
  )

  }

  private parseLiteral(
    nestingLevel: number,
    parentArgType: ArgType
  ): Result<LiteralElement, ParserError> {
    const start = this.clonePosition()

    let value = ''
    while (true) {
      const parseQuoteResult = this.tryParseQuote(parentArgType)
      if (parseQuoteResult) {
        value += parseQuoteResult
        continue
      }

      const parseUnquotedResult = this.tryParseUnquoted(
        nestingLevel,
        parentArgType
      )
      if (parseUnquotedResult) {
        value += parseUnquotedResult
        continue
      }

      const parseLeftAngleResult = this.tryParseLeftAngleBracket()
      if (parseLeftAngleResult) {
        value += parseLeftAngleResult
        continue
      }

      break
    }

    const location = createLocation(start, this.clonePosition())
    return {
      val: {type: TYPE.literal, value, location},
      err: null,
    }
  }

  tryParseLeftAngleBracket(): string | null {
    if (