Method tryParseUnquoted

packages/icu-messageformat-parser/parser.ts:507–528

(
    nestingLevel: number,
    parentArgType: ArgType
  )

  }

  private tryParseUnquoted(
    nestingLevel: number,
    parentArgType: ArgType
  ): string | null {
    if (this.isEOF()) {
      return null
    }
    const ch = this.char()

    if (
      ch === 60 /* `<` */ ||
      ch === 123 /* `{` */ ||
      (ch === 35 /* `#` */ &&
        (parentArgType === 'plural' || parentArgType === 'selectordinal')) ||
      (ch === 125 /* `}` */ && nestingLevel > 0)
    ) {
      return null
    } else {
      this.bump()
      return String.fromCodePoint(ch)
    }
  }

  private parseArgument(
    nestingLevel: number,