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Clarifies how character encodings work.

This commit is contained in:
Robert Baruch 2020-11-25 11:57:17 -08:00
parent 1faf0e6dcc
commit 5d1bb79895
1 changed files with 5 additions and 5 deletions
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10
manual/CHAPTER_TextRtlil.tex
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@ -25,13 +25,13 @@ Finally, note that all statements (rules ending in \texttt{-stmt}) terminate in
\subsection{Characters}
The characters accepted in an RTLIL file are those encodable in 8 bits. Unicode is not supported. For maximum safety, limit characters to the 7-bit ASCII range $[0,127]$.
The characters accepted in an RTLIL file are those encodable in 8 bits. UTF-8 is safe to use. Byte order marks at the beginning of the file will cause an error.
Between lexer tokens outside of strings, spaces (ASCII 32) and tabs (ASCII 9) are ignored.
ASCII spaces (32) and tabs (9) separate lexer tokens.
A \texttt{nonws} character is any character other than a space (ASCII 32), tab (ASCII 9), newline (ASCII 10), or carriage return (ASCII 13).
A \texttt{nonws} character, used in identifiers, is any character whose encoding consists solely of bytes above ASCII space (32).
An \texttt{eol} is any number of consecutive newlines (ASCII 10) and carriage returns (ASCII 13).
An \texttt{eol} is one or more consecutive ASCII newlines (10) and carriage returns (13).
\subsection{Identifiers}
@ -76,7 +76,7 @@ An \textit{integer} is simply a signed integer value in decimal format. \textbf{
\subsection{Strings}
A string is a series of characters delimited by double-quote characters. Within a string, certain escapes can be used:
A string is a series of characters delimited by double-quote characters. Within a string, any character except ASCII NUL (0) may be used. In addition, certain escapes can be used:
\begin{itemize}
\item \texttt{\textbackslash n}: A newline