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prevent the three "keywords" from being used as bare identifiers 

Fixes: https://github.com/kdl-org/kdl/issues/114
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Kat Marchán 2021-08-31 20:25:44 -07:00
parent 3f739cad42
commit 7c24f9a88b
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1 changed files with 6 additions and 3 deletions
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SPEC.md
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@ -81,7 +81,9 @@ foo 1 key="val" 3 {
A bare Identifier is composed of any unicode codepoint other than [non-initial
characters](#non-inidital-characters), followed by any number of unicode
codepoints other than [non-identifier characters](#non-identifier-characters),
so long as this doesn't produce something confusable for a [Number](#number).
so long as this doesn't produce something confusable for a [Number](#number),
[Boolean](#boolean), or [Null](#null).
Identifiers are terminated by [Whitespace](#whitespace) or
[Newlines](#newline).
@ -312,10 +314,11 @@ node-space := ws* escline ws* | ws+
node-terminator := single-line-comment | newline | ';' | eof
identifier := string | bare-identifier
bare-identifier := (identifier-char - digit - sign) identifier-char* | sign ((identifier-char - digit) identifier-char*)?
bare-identifier := ((identifier-char - digit - sign) identifier-char* | sign ((identifier-char - digit) identifier-char*)?) - keyword
identifier-char := unicode - linespace - [\/(){}<>;[]=,"]
keyword := boolean | 'null'
prop := identifier '=' value
value := string | number | boolean | 'null'
value := string | number | keyword
string := raw-string | escaped-string
escaped-string := '"' character* '"'