spec: describe components of EBNF grammar #695
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considerations.md
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| The above expression defines a symbol, "literal", that matches the exact input of "matchthis". | ||
| Character classes are dilineated by brackets (`[]`), describing either a set, range or multiple range of characters: |
considerations.md
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| Each expression must be matched once and only once. | ||
| To allow for describing repitition and optional match criteria, the postfix operators "*" and "+" are defined. |
stevvooe
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Nothing jumps out at me as being wrong, and seems fine to include our own grammar. looks like |
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ah. then rebase pls 😸 |
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| algorithm ::= algorithm-component (algorithm-separator algorithm-component)* | ||
| algorithm-component ::= [a-z0-9]+ | ||
| algorithm-separator ::= [+._-] | ||
| encoded ::= [a-zA-Z0-9=_-]+ |
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this line would seem to get broken into something like [a-z]* | [A-Z]* | [0-9]* | [=_-]+...
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| The above symbol "set" would match one character of either "a", "b" or "c". | ||
| The symbol "range" would match any character, "A" to "Z", inclusive. | ||
| Currently, only matching for 7-bit ascii literals and character classes is defined, as that is all that is required by this specification. |
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Or should it be clarified that multiple ranges can be in the same brackets, along with a set?
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from @wking "multiple ranges and explicit characters should be allowed in a single range. The XML-spec wording for that is "Enumerations and ranges can be mixed in one set of brackets." https://www.w3.org/TR/REC-xml/#sec-notation"
To clarify the grammar definitions, we define the subset of EBNF used by this specification to specify various field formats. Signed-off-by: Stephen J Day <[email protected]>
Signed-off-by: Stephen J Day <[email protected]>
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@vbatts Added the character range requests. |
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LGTM |
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@jonboulle your review would be nice 🥇 |
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LGTM |
To clarify the grammar definitions, we define the subset of EBNF used by
this specification to specify various field formats.
Signed-off-by: Stephen J Day [email protected]
Closes #692