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本提交完整实现了txt词典的注释语法与排序规则，包括向后兼容的API设计和命令行工具支持。 ## 注释语法支持 **基本语法：** - 注释行：以 # 开头的整行 - 词典记录行：以tab分隔的 key/value pair - 空行：不包含任何可见字符 **注释块分类：** - Header block：文件开头注释块（在第一个词典记录前的最后一个空行之前） - Footer block：文件结尾注释块（在最后一条词典记录之后） - Attached block：紧贴词典记录行的注释块（中间无空行） - Floating block：游离注释块（不满足attach条件的注释块） **排序规则：** - 排序最小单位为词典记录 + 其附加的注释块 - Header/Footer block固定在文件开头/结尾 - 仅对词典记录的key进行稳定排序 - Floating block在排序后插入到其锚点位置 ## 向后兼容设计 **默认行为（preserveComments=false）：** - 完全兼容旧版本 - 遇到 # 开头的行会抛出异常（原行为） - 不解析和保存注释结构 **新行为（preserveComments=true）：** - # 开头的行被识别为注释，不报错 - 保存注释块结构用于排序和序列化 ## API修改 **核心API：** - Lexicon::ParseLexiconFromFile(FILE* fp, bool preserveComments = false) - TextDict::NewFromFile(FILE* fp, bool preserveComments = false) - TextDict::NewFromSortedFile(FILE* fp, bool preserveComments = false) - ConvertDictionary(..., bool preserveComments = false) **命令行工具：** opencc_dict 添加了 -p, --preserve-comments 参数 使用示例： ```bash # 默认行为（向后兼容）- 会对带注释的文件报错 opencc_dict -i input.txt -o output.txt -f text -t text # 保留注释并排序 opencc_dict -i input.txt -o output.txt -f text -t text --preserve-comments ``` ## 实现细节 **数据结构：** - CommentBlock：注释块结构 - AnnotatedEntry：带注释的词条 - 在Lexicon中添加了header/footer/annotated/floating blocks的存储 **核心逻辑：** - 重写ParseLexiconFromFile，支持两种解析模式 - 实现SortWithAnnotations，确保注释块随词条移动 - 修改TextDict::SerializeToFile，正确输出注释块和空行 ## 测试 添加了完整的测试覆盖（LexiconAnnotationTest）： - ParseCommentLines：解析注释行 - ParseAttachedComment：解析附加注释 - ParseFloatingComment：解析游离注释 - ParseFooterComment：解析尾部注释 - SerializeWithAnnotations：带注释的序列化 - SortWithAnnotations：带注释的排序 - DefaultBehaviorIgnoresComments：验证默认行为 - DefaultBehaviorRejectsCommentLines：验证向后兼容 所有8个测试通过。手动测试命令行工具功能正常。
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Add standardized headers listing the official config usage for each top-level dictionary file.
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BYVoid
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BYVoid
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