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Funcons-beta : Thunks.cbs | PLAIN | PDF
[ Datatype thunks Funcon thunk Funcon force ] \begin{align*}
[ \
\KEY{Datatype} \quad & \NAMEREF{thunks} \\
\KEY{Funcon} \quad & \NAMEREF{thunk} \\
\KEY{Funcon} \quad & \NAMEREF{force}
\ ]
\end{align*} [ Datatype Funcon Funcon thunks thunk force ] Meta-variables T < : values \begin{align*}
\KEY{Meta-variables} \quad
& \VAR{T} <: \NAMEHYPER{../..}{Value-Types}{values}
\end{align*} Meta-variables T <: values Datatype thunks ( T ) : : = thunk ( _ : abstractions ( ( ) ⇒ T ) ) \begin{align*}
\KEY{Datatype} \quad
\NAMEDECL{thunks}(
\VAR{T} )
\ ::= \ & \NAMEDECL{thunk}(
\_ : \NAMEHYPER{../.}{Generic}{abstractions}
( ( \ ) \TO \VAR{T} ))
\end{align*} Datatype thunks ( T ) ::= thunk ( _ : abstractions (( ) ⇒ T )) thunks ( T ) \SHADE{\NAMEREF{thunks}
( \VAR{T} )} thunks ( T ) T \SHADE{\VAR{T}} T thunk ( abstraction ( X ) ) \SHADE{\NAMEREF{thunk}
( \NAMEHYPER{../.}{Generic}{abstraction}
( \VAR{X} ) )} thunk ( abstraction ( X )) thunk ( closure ( X ) ) \SHADE{\NAMEREF{thunk}
( \NAMEHYPER{../.}{Generic}{closure}
( \VAR{X} ) )} thunk ( closure ( X ))
Funcon force ( _ : thunks ( T ) ) : ⇒ T \begin{align*}
\KEY{Funcon} \quad
& \NAMEDECL{force}(
\_ : \NAMEREF{thunks}
( \VAR{T} ))
: \TO \VAR{T}
\end{align*} Funcon force ( _ : thunks ( T )) : ⇒ T force ( H ) \SHADE{\NAMEREF{force}
( \VAR{H} )} force ( H ) H \SHADE{\VAR{H}} H
Rule force ( thunk ( abstraction ( X ) ) ) ⇝ no-given ( X ) \begin{align*}
\KEY{Rule} \quad
& \NAMEREF{force}
( \NAMEREF{thunk}
( \NAMEHYPER{../.}{Generic}{abstraction}
( \VAR{X} ) ) ) \leadsto
\NAMEHYPER{../../../Computations/Normal}{Giving}{no-given}
( \VAR{X} )
\end{align*} Rule force ( thunk ( abstraction ( X ))) ⇝ no-given ( X )
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