Editorial: Extract JSON parsing into its own AO #3540
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nicolo-ribaudo
commented
Feb 19, 2025
| <dl class="header"> | ||
| </dl> | ||
| <emu-alg> | ||
| 1. [id="step-json-parse-validate"] If StringToCodePoints(_text_) is not a valid JSON text as specified in ECMA-404, throw a *SyntaxError* exception. |
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I had to reword this step otherwise ecmarkup was complaining that this AO can never return an abrupt completion.
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That's arguably a bug in ecmarkup, but I like this wording better anyway.
nicolo-ribaudo
commented
Feb 19, 2025
spec.html
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| <p>It is not permitted for a conforming implementation of `JSON.parse` to extend the JSON grammars. If an implementation wishes to support a modified or extended JSON interchange format it must do so by defining a different parse function.</p> | ||
| <emu-note> | ||
| <p>In the case where there are duplicate name Strings within an object, lexically preceding values for the same key shall be overwritten.</p> | ||
| </emu-note> |
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I moved these two sentences from InternalizeJSONProperty to here, since they didn't really make sense there.
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bakkot
reviewed
Feb 19, 2025
michaelficarra
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Feb 26, 2025
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bakkot
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Mar 12, 2025
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Ref #3538 / #3391 (comment). I'm also going to use this AO in ECMA-426.