[project @ 1996-07-25 20:43:49 by partain]

[ghc-hetmet.git] / ghc / docs / add_to_compiler / stg-summary-fig.verb

diff --git a/ghc/docs/add_to_compiler/stg-summary-fig.verb b/ghc/docs/add_to_compiler/stg-summary-fig.verb
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-\begin{figure} \fbox{
-$\begin{array}{lrcll}
-%\mbox{Program} & prog & \rightarrow & binds & \\
-%\\
-\mbox{Bindings} & binds & \rightarrow 
-       & bind_1 @;@ \ldots @;@~ bind_n & n \geq 1 \\
-& bind & \rightarrow &  var ~@=@~ vars_f ~@\@ upd~ vars_a ~@->@~expr
-                       & \mbox{Closure} \\
-                       &&&& (vars_f = \freevars{expr} \setminus vars_a) \\
-\\
-\mbox{Update flag} & upd & \rightarrow & @u@ & \mbox{Updatable} \\
-       && | & @n@                              & \mbox{Not updatable} \\
-\\
-\mbox{Expression} & expr 
-       & \rightarrow & @let@~binds~@in@~ expr
-               & \mbox{Local definition} \\
-       && | & @letrec@~binds~@in@~expr
-               & \mbox{Local recursive definition} \\
-       && | & @case@~expr~@of@~alts 
-               & \mbox{Case expression} \\
-       && | & var~vars & \mbox{Application}\\
-       && | & con~vars 
-               & \mbox{Saturated constructor} \\
-       && | & prim~vars 
-               & \mbox{Saturated primitive}   \\
-       && | & literal & \\
-\\
-
-\mbox{Alternatives} & alts & \rightarrow 
-       & calt_1@;@ \ldots @;@~calt_n@; default ->@~ expr 
-               & n \geq 0~\mbox{(Boxed)}       \\
-       && | & lalt_1@;@ \ldots @;@~lalt_n@;@~var ~@->@~ expr 
-               & n \geq 0~\mbox{(Unboxed)}     \\
-\\
-\mbox{Constructor alt} 
-       & calt & \rightarrow & con~vars~@->@~expr &  \\
-\mbox{Literal alt}     
-       & lalt & \rightarrow & literal~@->@~expr &  \\
-\\
-\mbox{Literals} & literal 
-       & \rightarrow & integer                 & \\
-       && | & \ldots & \\
-\\
-\mbox{Primitives} & prim
-       & \rightarrow & @+@ ~|~ @-@ ~|~ @*@ ~|~ @/@ \\
-       && | & \ldots & \\
-\\
-\mbox{Variable lists} & vars & \rightarrow & 
-               @[@var_1@,@ \ldots @,@~var_n@]@                 & n \geq 0 \\
-\\
-\end{array}$
-}
-\caption{Syntax of the STG language}
-\label{fig:stg-syntax}
-\end{figure}