哪些有效的 JSON 文件不是有效的 YAML 1.1 文件? [英] What valid JSON files are not valid YAML 1.1 files?
问题描述
YAML 1.2 是(有一个关于重复键的次要警告)超集JSON，因此任何有效的 JSON 文件也是有效的 YAML 文件.但是，YAML 1.1 规范(其中有最多的 库支持) 没有提到 JSON.大多数有效的 JSON 文件都是有效的 YAML 1.1 文件，但我通过试验 PyYaml 和 Python 的标准 JSON 库发现了至少一个例外:
YAML 1.2 is (with one minor caveat regarding duplicate keys) a superset of JSON, so any valid JSON file is also a valid YAML file. However, the YAML 1.1 specification (which has the most library support) doesn't mention JSON. Most valid JSON files are valid YAML 1.1 files, but I found at least one exception by experimenting with PyYaml and Python's standard JSON library:
- 像
12345e999这样的双精度浮点溢出被 PyYAML 和 IEEE infinity 来自 Python 的 JSON 库.
- a double-precision floating-point overflow such as
12345e999is interpreted as a string by PyYAML and IEEE infinity by Python's JSON library.
有没有人有完整的差异列表，比通过在特定实现中测试边缘案例更可靠地确定?(也就是说，从规范的比较?)例如，我想生成 JSON 字符串，这些字符串将被 JSON 解析器和 YAML 1.1 解析器以相同的方式解释:我必须对我的字符串设置什么约束?
Does anyone have a complete list of differences, determined more robustly than by testing edge cases in a particular implementation? (That is, from a comparison of the specifications?) For example, I want to generate JSON strings that will be interpreted the same way by a JSON parser and a YAML 1.1 parser: what constraints must I place on my strings?
推荐答案
参见这里(特别是脚注 25).它说:
See here (specifically footnote 25). It says:
不兼容的地方如下:JSON 允许扩展字符设置像 UTF-32 并且具有不兼容的 unicode 字符转义语法相对于 YAML；YAML 在逗号等分隔符后需要一个空格，等于和冒号，而 JSON 没有.一些不规范的JSON 的实现扩展了语法以包含 Javascript 的/*...*/评论.处理这种边缘情况可能需要光在解析为内联 YAML 之前对 JSON 进行预处理
The incompatibilities were as follows: JSON allows extended character sets like UTF-32 and had incompatible unicode character escape syntax relative to YAML; YAML required a space after separators like comma, equals, and colon while JSON does not. Some non-standard implementations of JSON extend the grammar to include Javascript's /*...*/ comments. Handling such edge cases may require light pre-processing of the JSON before parsing as in-line YAML
另请参阅 https://metacpan.org/pod/JSON::XS#JSON-and-YAML
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