\item Language in a language
\item Use the properties of the host
\item E.g., Ivory, \ldots\pause{} and iTasks
+ \pause{}
+ \item Different embedding techniques
\end{itemize}
\end{frame}
\end{block}
\column{.49\textwidth}
\pause{}
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
:: DSL = LitI Int | LitB Bool
| Var String | Plus DSL DSL
| Minus DSL DSL | And DSL DSL
\end{block}
\pause{}
\column{.49\textwidth}
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
:: Env = ...
:: DSL a = DSL (Env -> a)
}
\column{.49\textwidth}
\begin{onlyenv}<2->
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
:: Env = ...
:: Evaluator a = Evaluator (Env -> a)
:: PrettyPrinter a = PP String
\pause{}
\begin{block}{What is mTask}
\begin{itemize}
- \item EDSL
+ \item Created by Pieter Koopman and Rinus Plasmeijer
+ \item EDSL for imperative programs
\item Arduino C++ generation, iTasks simulation
\end{itemize}
\end{block}
\begin{frame}[fragile]
\frametitle{Expressions}
\begin{block}{mTask}
- \begin{itemize}
- \item Two phantom types
- \item Hierarchy
- \end{itemize}
+ Of the form \CI{v t p}
\end{block}
\pause{}
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
class arith v where
lit :: t -> v t Expr
- (+.) infixl 6 :: (v t p) (v t q) -> v t Expr | +, zero t & isExpr p & isExpr q
- (-.) infixl 6 :: (v t p) (v t q) -> v t Expr | -, zero t & ...
+ (+.) infixl 6 :: (v t p) (v t q) -> v t Expr | +, zero t & isExpr p & isExpr q
+ (-.) infixl 6 :: (v t p) (v t q) -> v t Expr | -, zero t & ...
...
class boolExpr v where
Not :: (v Bool p) -> v Bool Expr | ...
\begin{frame}[fragile]
\frametitle{Control flow}
- \begin{lstlisting}
-class If v q r ~s where
- If :: (v Bool p) (v t q) (v t r) -> v t s | ...
-
+ \begin{lstlisting}[language=Clean]
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 x y Expr
-
class seq v where
(:.) infixr 0 :: (v t p) (v u q) -> v u Stmt | ...
\end{lstlisting}
\begin{frame}[fragile]
\frametitle{Assignment and Input/Output}
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
:: DigitalPin = D0 | D1 | D2 ...
:: AnalogPin = A0 | A1 | A2 ...
\begin{frame}[fragile]
\frametitle{Shared Data Sources and Assignment}
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
:: In a b = In infix 0 a b
:: Main a = {main :: a}
\begin{frame}[fragile]
\frametitle{Examples}
- \begin{lstlisting}
+ \begin{lstlisting}[language=Clean]
blink = task \blink=(\x.
- IF (x ==. lit True)
- (ledOn led)
- (ledOff led) :.
+ IF x)
+ (ledOn LED1)
+ (ledOff LED2) :.
blink (lit 1000) (Not x))
In {main=blink (lit 1000) True}
thermostat :: Main (View () Stmt)
-thermostat = {main = IF (analogRead A0 >. lit 50)
- ( digitalWrite D0 (lit True) )
- ( digitalWrite D0 (lit False) )
- }
+thermostat = {main = digitalWrite (dIO D0) (analogRead A0 >. lit 50)
thermostat2 :: Main (View () Stmt)
-thermostat2 = let a0 = aIO A0
- d0 = dIO D0
- in {main = IF (a0 >. lit 50)
- (d0 =. lit True)
- (d0 =. lit False)
- }
+thermostat = {main = (dIO D0) =. (analogRead A0 >. lit 50)
\end{lstlisting}
\end{frame}