presentation start

[msc-thesis1617.git] / methods.mtask.tex

diff --git a/methods.mtask.tex b/methods.mtask.tex
index d8d9fdf..38930c5 100644 (file)
--- a/methods.mtask.tex
+++ b/methods.mtask.tex
@@ -70,7 +70,9 @@ in Listing~\ref{lst:control}. The first class of \emph{If} statements describes
 the regular \emph{if} statement. The expressions given can have any role. The
 functional dependency on \CI{s} determines the return type of the statement.
 The listing includes examples of implementations that illustrate this
 the regular \emph{if} statement. The expressions given can have any role. The
 functional dependency on \CI{s} determines the return type of the statement.
 The listing includes examples of implementations that illustrate this

-dependency.
+dependency. A special \emph{If} statement --- only used for statements --- is
+also added under the name \CI{IF}, of which the \CI{?} is a conditional
+statement to execute.

 
 The sequence operator is straightforward and its only function is to tie
 two expressions together. The left expression is executed first, followed by
 
 The sequence operator is straightforward and its only function is to tie
 two expressions together. The left expression is executed first, followed by


@@ -81,6 +83,10 @@ the right expression.
 class If v q r ~s where
   If :: (v Bool p) (v t q) (v t r) -> v t s | ...
 
 class If v q r ~s where
   If :: (v Bool p) (v t q) (v t r) -> v t s | ...
 

+class IF v where
+  IF :: (v Bool p) (v t q) (v s r) -> v () Stmt | ...
+  (?) infix 1 :: (v Bool p) (v t q) -> v () Stmt | ...
+

 instance If Code Stmt Stmt Stmt
 instance If Code e    Stmt Stmt
 instance If Code Stmt e    Stmt
 instance If Code Stmt Stmt Stmt
 instance If Code e    Stmt Stmt
 instance If Code Stmt e    Stmt


@@ -122,10 +128,10 @@ class assign v where
   (=.) infixr 2 :: (v t Upd) (v t p) -> v t Expr | ...
 \end{lstlisting}
 
   (=.) infixr 2 :: (v t Upd) (v t p) -> v t Expr | ...
 \end{lstlisting}
 

-One way of storing data in \glspl{mTask} is using \glspl{SDS}. \glspl{SDS}
-serve as variables in \gls{mTask} and maintain their value across executions.
-\glspl{SDS} can be used by multiple \glspl{Task} and can be used to share data.
-The classes associated with \glspl{SDS} are listed in
+One way of storing data in \gls{mTask}-\glspl{Task} is using \glspl{SDS}.
+\glspl{SDS} serve as variables in \gls{mTask} and maintain their value across
+executions.  \glspl{SDS} can be used by multiple \glspl{Task} and can be used
+to share data.  The classes associated with \glspl{SDS} are listed in

 Listing~\ref{lst:sdsclass}. The \CI{Main} type is introduced to box an
 \gls{mTask} and make it recognizable by the type system by separating programs
 and decorations such as \glspl{SDS}.
 Listing~\ref{lst:sdsclass}. The \CI{Main} type is introduced to box an
 \gls{mTask} and make it recognizable by the type system by separating programs
 and decorations such as \glspl{SDS}.


@@ -142,7 +148,7 @@ class sds v where
 \section{Semantics}
 The \gls{C}-backend of the \gls{mTask}-system has an engine that is generated
 alongside the code for the \glspl{Task}. This engine will execute the
 \section{Semantics}
 The \gls{C}-backend of the \gls{mTask}-system has an engine that is generated
 alongside the code for the \glspl{Task}. This engine will execute the

-\glspl{mTask} according to certain rules and semantics.
+\gls{mTask}-\glspl{Task} according to certain rules and semantics.

 \gls{mTask}-\glspl{Task} do not behave like functions but more like
 \gls{iTasks}-\glspl{Task}. An \gls{mTask} is queued when either its timer runs
 out or when it is launched by another \gls{mTask}. When an \gls{mTask} is
 \gls{mTask}-\glspl{Task} do not behave like functions but more like
 \gls{iTasks}-\glspl{Task}. An \gls{mTask} is queued when either its timer runs
 out or when it is launched by another \gls{mTask}. When an \gls{mTask} is


@@ -199,20 +205,20 @@ count = task \count = (\n.count (lit 1000) (n +. One)) In {main = count (lit 100
 \end{lstlisting}
 
 \section{Example mTask}
 \end{lstlisting}
 
 \section{Example mTask}

-Some example \glspl{mTask} using almost all of their functionality are shown in
-Listing~\ref{lst:exmtask}. The \glspl{mTask} shown in the example do not belong
-to a particular view and therefore are of the type \CI{View t r}. The
-\CI{blink} \gls{mTask} show the classic \gls{Arduino} blinking led application
-that blinks a certain \gls{LED} every second. The \CI{thermostat} expression
-will enable a digital pin powering a cooling fan when the analog pin
-representing a temperature sensor is too high. \CI{thermostat`} shows the same
-expression but now using the assignment style \gls{GPIO} technique. The
-\CI{thermostat} example also shows that it is not necessary to run everything
-as a \CI{task}. The main program code can also just consist of the contents of
-the root \CI{main} itself.
+Some example \gls{mTask}-\glspl{Task} using almost all of their functionality
+are shown in Listing~\ref{lst:exmtask}. The \gls{mTask}-\glspl{Task} shown in
+the example do not belong to a particular view and therefore are of the type
+\CI{View t r}.  The \CI{blink} \gls{mTask} show the classic \gls{Arduino}
+blinking led application that blinks a certain \gls{LED} every second. The
+\CI{thermostat} expression will enable a digital pin powering a cooling fan
+when the analog pin representing a temperature sensor is too high.
+\CI{thermostat`} shows the same expression but now using the assignment style
+\gls{GPIO} technique. The \CI{thermostat} example also shows that it is not
+necessary to run everything as a \CI{task}. The main program code can also just
+consist of the contents of the root \CI{main} itself.

 
 \begin{lstlisting}[%
 
 \begin{lstlisting}[%

-       label={lst:exmtask},caption={Some example \glspl{mTask}}]
+       label={lst:exmtask},caption={Some example \gls{mTask}-\glspl{Task}}]

 blink = task \blink=(\x.
                IF (x ==. lit True) (ledOn led) (ledOff led) :.
                blink (lit 1000) (Not x)
 blink = task \blink=(\x.
                IF (x ==. lit True) (ledOn led) (ledOff led) :.
                blink (lit 1000) (Not x)