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doc/spec/03.concrete_syntax.tex
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\chapter{Concrete Syntax}
\chapter{Concrete Syntax and\\
Informal Semantics}
\label{sec:concrete_syntax}
In this chapter we describe the concrete syntax of the language as it is recognized by the parser. In the
@ -23,81 +24,5 @@ part of concrete syntax.
\input{03.03.scope_expressions}
\input{03.04.expressions}
\begin{figure}[t]
\[
\begin{array}{rcll}
\defterm{pattern} & : & \nonterm{consPattern}\alt\nonterm{simplePattern}&\\
\defterm{consPattern} & : & \nonterm{simplePattern}\s\term{:}\s\nonterm{pattern}&\\
\defterm{simplePattern} & : & \nonterm{wildcardPattern} & \alt\\
& & \nonterm{S-exprPattern} & \alt \\
& & \nonterm{arrayPattern} & \alt \\
& & \nonterm{listPattern} & \alt \\
& & \token{LIDENT}\s[\s\term{@}\s\nonterm{pattern} \s] & \alt \\
& & [\s\term{-}\s]\s\token{DECIMAL}& \alt \\
& & \token{STRING} & \alt \\
& & \token{CHAR} & \alt \\
& & \term{true} & \alt \\
& & \term{false} & \alt \\
& & \term{\#}\s\term{boxed} & \alt \\
& & \term{\#}\s\term{unboxed} & \alt \\
& & \term{\#}\s\term{string} & \alt \\
& & \term{\#}\s\term{array} & \alt \\
& & \term{\#}\s\term{sexp} & \alt \\
& & \term{\#}\s\term{fun} & \alt \\
& & \term{(}\s\nonterm{pattern}\s\term{)} & \\
\defterm{wildcardPattern} & : & \term{\_} &\\
\defterm{S-exprPattern} & : & \token{UIDENT}\s[\s\term{(}\s\nonterm{pattern}\s(\s\term{,}\s\nonterm{pattern})^\star\s\term{)}\s] &\\
\defterm{arrayPattern} & : & \term{[}\s[\s\nonterm{pattern}\s(\s\term{,}\s\nonterm{pattern})^\star\s]\s\term{]} &\\
\defterm{listPattern} & : & \term{\{}\s[\s\nonterm{pattern}\s(\s\term{,}\s\nonterm{pattern})^\star\s]\s\term{\}} &
\end{array}
\]
\caption{Pattern concrete syntax}
\end{figure}
\begin{figure}[t]
\[
\begin{array}{rcll}
\defterm{ifExpression} & : & \term{if}\s\nonterm{expression}\s\term{then}\s\nonterm{scopeExpression}\s[\s\nonterm{elsePart}\s]\s\term{fi}&\\
\defterm{elsePart} & : & \term{elif}\s\nonterm{expression}\s\term{then}\s\nonterm{scopeExpression}\s[\s\nonterm{elsePart}\s]&\alt\\
& & \term{else}\s\nonterm{scopeExpression}&
\end{array}
\]
\caption{If-expression concrete syntax}
\end{figure}
\begin{figure}[t]
\[
\begin{array}{rcl}
\defterm{whileExpression} & : & \term{while}\s\nonterm{expression}\s\term{do}\s\nonterm{scopeExpression}\s\term{od}\\
\defterm{repeatExpression} & : & \term{repeat}\s\nonterm{scopeExpression}\s\term{until}\s\nonterm{basicExpression}\\
\defterm{forExpression} & : & \term{for}\s\nonterm{expression}\s\term{,}\s\nonterm{expression}\s\term{,}\s\nonterm{expression}\\
& & \term{do}\nonterm{scopeExpresssion}\s\term{od}
\end{array}
\]
\caption{Loop expressions concrete syntax}
\end{figure}
\begin{figure}[t]
\[
\begin{array}{rcl}
\defterm{arrayExpression} & : & \term{[}\s[\s\nonterm{expression}\s(\s\term{,}\s\nonterm{expression}\s)^\star\s]\s\term{]}\\
\defterm{listExpression} & : & \term{\{}\s[\s\nonterm{expression}\s(\s\term{,}\s\nonterm{expression}\s)^\star\s]\s\term{\}}\\
\defterm{S-expression} & : & \token{UIDENT}\s[\s\term{(}\s\nonterm{expression}\s[\s(\s\term{,}\s\nonterm{expression}\s)^\star\s]\term{)}\s]
\end{array}
\]
\caption{Array, list, and S-expressions concrete syntax}
\end{figure}
\begin{figure}[t]
\[
\begin{array}{rcl}
\defterm{caseExpression} & : & \term{case}\s\nonterm{expression}\s\term{of}\s\nonterm{caseBranches}\s\term{esac}\\
\defterm{caseBranches} & : & \nonterm{caseBranch}\s[\s(\s\term{$\mid$}\s\nonterm{caseBranch}\s)^\star\s]\\
\defterm{caseBranch} & : & \nonterm{pattern}\s\term{$\rightarrow$}\s\nonterm{scopeExpression}
\end{array}
\]
\caption{Case-expression concrete syntax}
\end{figure}