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doc: resolve inconsistency in banned chars in escaped form (#450) 

Also add it explicitly to the spec grammar to make it clear that escaped forms are also affected
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Evgeny 2024-12-24 14:57:10 +07:00 committed by GitHub
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1 changed files with 7 additions and 2 deletions
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SPEC.md
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@ -819,7 +819,8 @@ considered _a single newline_.
### Disallowed Literal Code Points ### Disallowed Literal Code Points
The following code points may not appear literally anywhere in the document. The following code points may not appear literally anywhere in the document.
They may be represented in Strings (but not Raw Strings) using [Unicode Escapes](#escapes) (`\u{...}`). They may be represented in Strings (but not Raw Strings) using [Unicode Escapes](#escapes) (`\u{...}`,
except for non Unicode Scalar Value, which can't be represented even as escapes).
* The codepoints `U+0000-0008` or the codepoints `U+000E-001F` (various * The codepoints `U+0000-0008` or the codepoints `U+000E-001F` (various
control characters). control characters).
@ -876,9 +877,13 @@ disallowed-keyword-identifiers := 'true' | 'false' | 'null' | 'inf' | '-inf' | '
quoted-string := '"' single-line-string-body '"' | '"""' newline multi-line-string-body newline (unicode-space | ws-escape)* '"""' quoted-string := '"' single-line-string-body '"' | '"""' newline multi-line-string-body newline (unicode-space | ws-escape)* '"""'
single-line-string-body := (string-character - newline)* single-line-string-body := (string-character - newline)*
multi-line-string-body := (('"' | '""')? string-character)* multi-line-string-body := (('"' | '""')? string-character)*
string-character := '\\' (["\\bfnrts] | 'u{' hex-digit{1, 6} '}') | ws-escape | [^\\"] - disallowed-literal-code-points string-character := '\\' (["\\bfnrts] | 'u{' hex-unicode '}') | ws-escape | [^\\"] - disallowed-literal-code-points
ws-escape := '\\' (unicode-space | newline)+ ws-escape := '\\' (unicode-space | newline)+
hex-digit := [0-9a-fA-F] hex-digit := [0-9a-fA-F]
hex-unicode := hex-digit{1, 6} - surrogates
surrogates := [dD][8-9a-fA-F]hex-digit{2}
// U+D800-DFFF: D 8 00
// D F FF
raw-string := '#' raw-string-quotes '#' | '#' raw-string '#' raw-string := '#' raw-string-quotes '#' | '#' raw-string '#'
raw-string-quotes := '"' single-line-raw-string-body '"' | '"""' newline multi-line-raw-string-body newline unicode-space* '"""' raw-string-quotes := '"' single-line-raw-string-body '"' | '"""' newline multi-line-raw-string-body newline unicode-space* '"""'