Once the compiler is downloaded and untarred, go into the \texttt{heptagon/} and
type :
\begin{alltt}
> ./configure && make
\end{alltt}
This command will build the compiler, optionally the simulator (if the
\texttt{LablGTK2} library is found), and the standard library.
\subsubsection{Installation}
\label{sec:installation}
After the compilation, or the download and untar of the binary distribution, go
into the \texttt{heptagon/} directory and type :
\begin{alltt}
> make install
\end{alltt}
By default, this will install the binaries (\texttt{heptc} and \texttt{hepts}) into
\texttt{/usr/local/bin} and the standard library into
\texttt{/usr/local/lib}. Consider the \texttt{configure} script options
(\verb+./configure --help+) for other specific needs.
\subsection{Heptagon programs compilation}
\label{sec:hept-compilation}
The Heptagon compiler is named \texttt{heptc}. Its list of options is available by
:
@ -449,7 +517,7 @@ The following operators are defined for arrays:
\item Accessing an element at a constant index: \lstinline{t[4]}
\item Accessing an element at a dynamic index with a default value: \lstinline{z = t.[x] default v} is a stream defined by $z_i = t_i[x_i]$ if $0\leq x_i < n$ and $z_i = v_i$ otherwise (where $n$ is the size of \lstinline+t+).
\item Accessing an element at a truncated index: \lstinline+z = t[>x<]+ is defined by $z_i = t_i[\min(\max(0, x_i), n-1)]$ (where $n$ is the size of \lstinline+t+).
\item Modifying an element: \lstinline{t' = [ t with [x] = v ]} is a new array equal to \lstinline+t+, except for the element at index \lstinline+x+ which is equal to $v$, that is for all j in $[0, n-1]$ such that $j \neq x_i$, $t'_i[j]= t[j]$ and $t'_i[x_i]= v_i$.
\item Modifying an element: \lstinline{t' = [ t with [x] = v ]} is a new array equal to \lstinline+t+, except for the element at index \lstinline+x+ which is equal to $v$, that is for all j in $[0, n-1]$ such that $j \neq x_i$, $t'_i[j]= t_i[j]$ and $t'_i[x_i]= v_i$.
\item Defining an array by copying one value: \lstinline+x^n+ is the array of size \lstinline+n+ whose elements are all equal to \lstinline+x+.
\item Defining an array explicitely: \lstinline+[1, x, 3, y, 5]+.
\item Extracting a slice: \lstinline+t[n..m]+ returns the sub array of \lstinline+t+ of size \lstinline{m-n+1} starting at index \lstinline+n+ and ending at index \lstinline+m+.
Gwenal Delaval
12 years ago