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docs: clarify that the optional fields are a function that take in the grammar object

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Amaan Qureshi 2025-01-10 21:24:50 -05:00
parent 7953aba070
commit 7668192a49
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docs/src/creating-parsers/2-the-grammar-dsl.md
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@ -95,7 +95,8 @@ one passed into the `wordset` parameter. This is useful for contextual keywords,
be used as a variable name in most contexts, but can be used as a property name.
In addition to the `name` and `rules` fields, grammars have a few other optional public fields that influence the behavior
of the parser.
of the parser. Each of these fields is a function that accepts the grammar object (`$`) as its only parameter, like the
grammar rules themselves. These fields are:
- **`extras`** — an array of tokens that may appear *anywhere* in the language. This is often used for whitespace and
comments. The default value of `extras` is to accept whitespace. To control whitespace explicitly, specify