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[lex] Move definitions, and remove redundant use, of "[non]digit" #8590

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[lex] Move definitions, and remove redundant use, of "[non]digit" #8590

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30 changes: 14 additions & 16 deletions source/lex.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -759,6 +759,19 @@
pp-number \terminal{.}
\end{bnf}

\begin{bnf}
\nontermdef{nondigit} \textnormal{one of}\br
\terminal{a b c d e f g h i j k l m}\br
\terminal{n o p q r s t u v w x y z}\br
\terminal{A B C D E F G H I J K L M}\br
\terminal{N O P Q R S T U V W X Y Z _}
\end{bnf}

\begin{bnf}
\nontermdef{digit} \textnormal{one of}\br
\terminal{0 1 2 3 4 5 6 7 8 9}
\end{bnf}

\pnum
Preprocessing number tokens lexically include
all \grammarterm{integer-literal} tokens\iref{lex.icon} and
Expand Down Expand Up @@ -903,30 +916,15 @@

\begin{bnf}
\nontermdef{identifier-start}\br
nondigit\br
\terminal{_}\br
\textnormal{an element of the translation character set with the Unicode property XID_Start}
\end{bnf}

\begin{bnf}
\nontermdef{identifier-continue}\br
digit\br
nondigit\br
\textnormal{an element of the translation character set with the Unicode property XID_Continue}
\end{bnf}

\begin{bnf}
\nontermdef{nondigit} \textnormal{one of}\br
\terminal{a b c d e f g h i j k l m}\br
\terminal{n o p q r s t u v w x y z}\br
\terminal{A B C D E F G H I J K L M}\br
\terminal{N O P Q R S T U V W X Y Z _}
\end{bnf}

\begin{bnf}
\nontermdef{digit} \textnormal{one of}\br
\terminal{0 1 2 3 4 5 6 7 8 9}
\end{bnf}

\pnum
\indextext{name!length of}%
\indextext{name}%
Expand Down