From: pimjager <pim@pimjager.nl>
Date: Thu, 17 Mar 2016 11:18:17 +0000 (+0100)
Subject: Added some stuff to slides
X-Git-Url: https://git.martlubbers.net/?a=commitdiff_plain;h=3d845cb7fe8ccdfd9799aae41acf8b81ed36a970;p=cc1516.git

Added some stuff to slides
---

diff --git a/deliverables/p1/p1.tex b/deliverables/p1/p1.tex
index 11b4699..27c30d1 100644
--- a/deliverables/p1/p1.tex
+++ b/deliverables/p1/p1.tex
@@ -38,6 +38,10 @@
 :: Error = PositionalError Int Int String | Error String
 :: Parser a b = Parser ([a] -> (Either Error b, [a]))
 			\end{CleanCode}
+		\pause
+			\item Result is either Error or \texttt{b}, not a \texttt{[b]} as
+				described Hutton \& Meijer \footnote{G. Hutton and E. Meijer. 
+				Monadic parser combinators. 1996.}
 		\pause
 		\item Matches longest left-most parser
 		\pause
@@ -48,24 +52,74 @@
 
 \begin{frame}[fragile]
 	\frametitle{\textsc{YARD} Combinators}
-	\begin{CleanCode}
-instance Functor (Parser a)
-instance Applicative (Parser a)
-instance Monad (Parser a)
-instance Alternative (Parser a)
-
-runParser :: (Parser a b) [a] -> (Either Error b, [a])
-(<?>) :: (Parser a b) Error -> Parser a b
+	\framesubtitle{Designed to be minimal, just 14 parsers/combinators}
+	YARD is designed to be minimal and defines just 14 primitives:
+	\begin{columns}[t]
+		\begin{column}{0.5\textwidth}
+			\begin{CleanCode}
+top :: Parser a a
+peek :: Parser a a
 fail :: Parser a b
+eof :: Parser a Void
+(until) :: (Parser a b) 
+        (Parser a c) 
+        -> Parser a [b]
+satisfy :: (a -> Bool) 
+        -> Parser a a
+check :: (a -> Bool) 
+        -> Parser a a
+item :: a -> Parser a a
+list :: [a] -> Parser a [a]
+			\end{CleanCode}
+		\end{column}
+		\begin{column}{0.5\textwidth}
+			\begin{CleanCode}
+(>>=) :: (Parser a b) 
+       (b -> Parser a c) 
+        -> Parser a c
+(<|>) :: (Parser a b) 
+       (Parser a b) 
+       -> Parser a b
+some :: (Parser a b) 
+       -> Parser a [b]
+many :: (Parser a b) 
+       -> Parser a [b]
+optional :: (Parser a b) 
+      -> Parser a (Maybe b)
+			\end{CleanCode}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+\begin{frame}[fragile]
+	\frametitle{\textsc{YARD} Combinators}
+	\framesubtitle{Designed to be minimal, just \textbf{7} parsers/combinators}
+	Actually, scrap that, just \textbf{7} primitives:
+	\begin{columns}[t]
+		\begin{column}{0.5\textwidth}
+			\begin{CleanCode}
 top :: Parser a a
 peek :: Parser a a
-satisfy :: (a -> Bool) -> Parser a a
-check :: (a -> Bool) -> Parser a a
-(until) infix 2 :: (Parser a b) (Parser a c) -> Parser a [b]
-item :: a -> Parser a a | Eq a
-list :: [a] -> Parser a [a] | Eq a
+fail :: Parser a b
 eof :: Parser a Void
-	\end{CleanCode}
+			\end{CleanCode}
+		\end{column}
+		\begin{column}{0.5\textwidth}
+			\begin{CleanCode}
+(>>=) :: (Parser a b) 
+       (b -> Parser a c) 
+        -> Parser a c
+(<|>) :: (Parser a b) 
+       (Parser a b) 
+       -> Parser a b
+			\end{CleanCode}
+		\end{column}
+	\end{columns}
+	All others can be (and are) derived from these. e.g.
+	\begin{lstlisting}
+satisfy :: (a -> Bool) -> Parser a a
+satisfy f = top >>= \c -> if (f c) (return c) fail
+	\end{lstlisting}
 \end{frame}
 
 \section{Design choices}