Method parseMessage

packages/icu-messageformat-parser/parser.ts:221–281

(
    nestingLevel: number,
    parentArgType: ArgType,
    expectingCloseTag: boolean
  )

  }

  private parseMessage(
    nestingLevel: number,
    parentArgType: ArgType,
    expectingCloseTag: boolean
  ): Result<MessageFormatElement[], ParserError> {
    let elements: MessageFormatElement[] = []

    while (!this.isEOF()) {
      const char = this.char()
      if (char === 123 /* `{` */) {
        const result = this.parseArgument(nestingLevel, expectingCloseTag)
        if (result.err) {
          return result
        }
        elements.push(result.val)
      } else if (char === 125 /* `}` */ && nestingLevel > 0) {
        break
      } else if (
        char === 35 /* `#` */ &&
        (parentArgType === 'plural' || parentArgType === 'selectordinal')
      ) {
        const position = this.clonePosition()
        this.bump()
        elements.push({
          type: TYPE.pound,
          location: createLocation(position, this.clonePosition()),
        })
      } else if (
        char === 60 /* `<` */ &&
        !this.ignoreTag &&
        this.peek() === 47 // char code for '/'
      ) {
        if (expectingCloseTag) {
          break
        } else {
          return this.error(
            ErrorKind.UNMATCHED_CLOSING_TAG,
            createLocation(this.clonePosition(), this.clonePosition())
          )
        }
      } else if (
        char === 60 /* `<` */ &&
        !this.ignoreTag &&
        _isAlpha(this.peek() || 0)
      ) {
        const result = this.parseTag(nestingLevel, parentArgType)
        if (result.err) {
          return result
        }
        elements.push(result.val)
      } else {
        const result = this.parseLiteral(nestingLevel, parentArgType)
        if (result.err) {
          return result
        }
        elements.push(result.val)
      }
    }