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json: document schema conversion in GBNF readme, align manual grammar examples & converters (#7841)

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* json: fix char pattern in grammar converters

* json: prevent number precision & whitespace runaways in example grammars

* json: add doc to grammar readme
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Olivier Chafik 2024-06-11 01:00:30 +01:00 • committed by GitHub
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commit 396b18dfec
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7 changed files with 67 additions and 28 deletions
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grammars/json.gbnf
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@ -16,10 +16,10 @@ array ::=
string ::=
"\"" (
[^"\\\x7F\x00-\x1F] |
"\\" (["\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F]) # escapes
"\\" (["\\bfnrt] | "u" [0-9a-fA-F]{4}) # escapes
)* "\"" ws
number ::= ("-"? ([0-9] | [1-9] [0-9]*)) ("." [0-9]+)? ([eE] [-+]? [0-9]+)? ws
number ::= ("-"? ([0-9] | [1-9] [0-9]{0,15})) ("." [0-9]+)? ([eE] [-+]? [0-9] [1-9]{0,15})? ws
# Optional space: by convention, applied in this grammar after literal chars when allowed
ws ::= ([ \t\n] ws)?
ws ::= [ \t\n]{0,20}