basic: manual wip

assets/tbas/doc/langref.tex

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+This chapter descibes the \tbas{} language.
+
+\section{Metasyntax}
+
+In the descriptions of BASIC syntax, this conventions apply.
+\\
+
+\begin{itemize}
+\item \codebf{"VERBATIM"} --- Type exactly as shown
+\item \code{IDENTIFIER} --- Replace \emph{identifier} with appropriate metavariable
+\item \code{[a]} --- Words within square brackets are optional
+\item \code{\{a|b\}} --- Choose either \code{a} or \code{b}
+\item \code{[a|b]} --- Optional version of above
+\item \code{a...} --- The preceding entity can be repeated
+\end{itemize}
+
+
+\section{Syntax In EBNF}
+
+\small\verbatiminput{syntax.txt}