Method parseArgumentOptions

packages/icu-messageformat-parser/parser.ts:635–866

(
    nestingLevel: number,
    expectingCloseTag: boolean,
    value: string,
    openingBracePosition: Position
  )

  }

  private parseArgumentOptions(
    nestingLevel: number,
    expectingCloseTag: boolean,
    value: string,
    openingBracePosition: Position
  ): Result<MessageFormatElement, ParserError> {
    // Parse this range:
    // {name, type, style}
    //        ^---^
    let typeStartPosition = this.clonePosition()
    let argType = this.parseIdentifierIfPossible().value
    let typeEndPosition = this.clonePosition()

    switch (argType) {
      case '':
        // Expecting a style string number, date, time, plural, selectordinal, or select.
        return this.error(
          ErrorKind.EXPECT_ARGUMENT_TYPE,
          createLocation(typeStartPosition, typeEndPosition)
        )
      case 'number':
      case 'date':
      case 'time': {
        // Parse this range:
        // {name, number, style}
        //              ^-------^
        this.bumpSpace()
        let styleAndLocation: {
          style: string
          styleLocation: Location
        } | null = null

        if (this.bumpIf(',')) {
          this.bumpSpace()

          const styleStartPosition = this.clonePosition()
          const result = this.parseSimpleArgStyleIfPossible()
          if (result.err) {
            return result
          }
          const style = trimEnd(result.val)

          if (style.length === 0) {
            return this.error(
              ErrorKind.EXPECT_ARGUMENT_STYLE,
              createLocation(this.clonePosition(), this.clonePosition())
            )
          }

          const styleLocation = createLocation(
            styleStartPosition,
            this.clonePosition()
          )
          styleAndLocation = {style, styleLocation}
        }

        const argCloseResult = this.tryParseArgumentClose(openingBracePosition)
        if (argCloseResult.err) {