65
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
1 |
\documentclass[dvipsnames,14pt,t]{beamer}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
2 |
\usepackage{beamerthemeplainculight}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
3 |
\usepackage[T1]{fontenc}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
4 |
\usepackage[latin1]{inputenc}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
5 |
\usepackage{mathpartir}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
6 |
\usepackage[absolute,overlay]{textpos}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
7 |
\usepackage{ifthen}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
8 |
\usepackage{tikz}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
9 |
\usepackage{pgf}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
10 |
\usepackage{calc}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
11 |
\usepackage{ulem}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
12 |
\usepackage{courier}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
13 |
\usepackage{listings}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
14 |
\renewcommand{\uline}[1]{#1}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
15 |
\usetikzlibrary{arrows}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
16 |
\usetikzlibrary{automata}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
17 |
\usetikzlibrary{shapes}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
18 |
\usetikzlibrary{shadows}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
19 |
\usetikzlibrary{positioning}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
20 |
\usetikzlibrary{calc}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
21 |
\usetikzlibrary{plotmarks}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
22 |
\usepackage{graphicx}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
23 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
24 |
\definecolor{javared}{rgb}{0.6,0,0} % for strings
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
25 |
\definecolor{javagreen}{rgb}{0.25,0.5,0.35} % comments
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
26 |
\definecolor{javapurple}{rgb}{0.5,0,0.35} % keywords
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
27 |
\definecolor{javadocblue}{rgb}{0.25,0.35,0.75} % javadoc
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
28 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
29 |
\lstset{language=Java,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
30 |
basicstyle=\ttfamily,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
31 |
keywordstyle=\color{javapurple}\bfseries,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
32 |
stringstyle=\color{javagreen},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
33 |
commentstyle=\color{javagreen},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
34 |
morecomment=[s][\color{javadocblue}]{/**}{*/},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
35 |
numbers=left,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
36 |
numberstyle=\tiny\color{black},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
37 |
stepnumber=1,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
38 |
numbersep=10pt,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
39 |
tabsize=2,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
40 |
showspaces=false,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
41 |
showstringspaces=false}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
42 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
43 |
\lstdefinelanguage{scala}{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
44 |
morekeywords={abstract,case,catch,class,def,%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
45 |
do,else,extends,false,final,finally,%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
46 |
for,if,implicit,import,match,mixin,%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
47 |
new,null,object,override,package,%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
48 |
private,protected,requires,return,sealed,%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
49 |
super,this,throw,trait,true,try,%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
50 |
type,val,var,while,with,yield},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
51 |
otherkeywords={=>,<-,<\%,<:,>:,\#,@},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
52 |
sensitive=true,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
53 |
morecomment=[l]{//},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
54 |
morecomment=[n]{/*}{*/},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
55 |
morestring=[b]",
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
56 |
morestring=[b]',
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
57 |
morestring=[b]"""
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
58 |
}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
59 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
60 |
\lstset{language=Scala,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
61 |
basicstyle=\ttfamily,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
62 |
keywordstyle=\color{javapurple}\bfseries,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
63 |
stringstyle=\color{javagreen},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
64 |
commentstyle=\color{javagreen},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
65 |
morecomment=[s][\color{javadocblue}]{/**}{*/},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
66 |
numbers=left,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
67 |
numberstyle=\tiny\color{black},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
68 |
stepnumber=1,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
69 |
numbersep=10pt,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
70 |
tabsize=2,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
71 |
showspaces=false,
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
72 |
showstringspaces=false}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
73 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
74 |
% beamer stuff
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
75 |
\renewcommand{\slidecaption}{AFL 08, King's College London, 21.~November 2012}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
76 |
\newcommand{\bl}[1]{\textcolor{blue}{#1}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
77 |
\newcommand{\dn}{\stackrel{\mbox{\scriptsize def}}{=}}% for definitions
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
78 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
79 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
80 |
% The data files, written on the first run.
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
81 |
\begin{filecontents}{s-grammar1.data}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
82 |
1 0.01152
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
83 |
51 0.07973
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
84 |
101 0.09726
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
85 |
151 0.09320
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
86 |
201 0.10010
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
87 |
251 0.16997
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
88 |
301 0.26662
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
89 |
351 0.46118
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
90 |
401 0.62516
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
91 |
451 0.87247
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
92 |
501 1.16334
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
93 |
551 1.71152
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
94 |
601 2.10958
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
95 |
651 2.44360
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
96 |
701 2.98488
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
97 |
751 3.50326
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
98 |
801 4.11036
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
99 |
851 4.93394
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
100 |
901 5.77465
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
101 |
951 7.39123
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
102 |
\end{filecontents}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
103 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
104 |
\begin{filecontents}{s-grammar2.data}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
105 |
1 0.01280
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
106 |
2 0.00064
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
107 |
3 0.00173
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
108 |
4 0.00355
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
109 |
5 0.00965
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
110 |
6 0.02674
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
111 |
7 0.06953
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
112 |
8 0.11166
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
113 |
9 0.18707
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
114 |
10 0.09189
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
115 |
11 0.12724
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
116 |
12 0.24337
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
117 |
13 0.59304
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
118 |
14 1.53594
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
119 |
15 4.01195
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
120 |
16 10.73582
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
121 |
17 29.51587
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
122 |
#18 73.14163
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
123 |
\end{filecontents}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
124 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
125 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
126 |
\begin{document}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
127 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
128 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
129 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
130 |
\begin{frame}<1>[t]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
131 |
\frametitle{%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
132 |
\begin{tabular}{@ {}c@ {}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
133 |
\\[-3mm]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
134 |
\LARGE Automata and \\[-2mm]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
135 |
\LARGE Formal Languages (8)\\[3mm]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
136 |
\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
137 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
138 |
\normalsize
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
139 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
140 |
\begin{tabular}{ll}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
141 |
Email: & christian.urban at kcl.ac.uk\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
142 |
Of$\!$fice: & S1.27 (1st floor Strand Building)\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
143 |
Slides: & KEATS (also home work is there)\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
144 |
\end{tabular}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
145 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
146 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
147 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
148 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
149 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
150 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
151 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
152 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
153 |
\begin{frame}[c]
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
154 |
\frametitle{\begin{tabular}{c}Building a ``Web Browser''\end{tabular}}
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
155 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
156 |
Using a lexer: assume the following regular expressions
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
157 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
158 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
159 |
\bl{\begin{tabular}{lcl}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
160 |
$SY\!M$ & $\dn$ & $(\text{a}..\text{zA}..\text{Z0}..\text{9}..)$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
161 |
$W\!O\!RD$ & $\dn$ & $SY\!M^+$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
162 |
$BT\!AG$ & $\dn$ & $<\!W\!O\!RD\!>$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
163 |
$ET\!AG$ & $\dn$ & $<\!/W\!O\!RD\!>$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
164 |
$W\!HIT\!E$ & $\dn$ & $\texttt{" "} + \texttt{"}\slash{}n\texttt{"}$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
165 |
\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
166 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
167 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
168 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
169 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
170 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
171 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
172 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
173 |
\begin{frame}[c]
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
174 |
\frametitle{\begin{tabular}{c}Interpreting a List of Tokens\end{tabular}}
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
175 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
176 |
\begin{itemize}
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
177 |
\item the text should be formatted consistently up to a specified width, say 60 characters
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
178 |
\item potential linebreaks are inserted by the formatter (not the input)
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
179 |
\item repeated whitespaces are ``condensed'' to a single whitepace
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
180 |
\item \bl{$<\!p\!>$} \bl{$<\!\slash{}p\!>$} start/end paragraph
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
181 |
\item \bl{$<\!b\!>$} \bl{$<\!\slash{}b\!>$} start/end bold
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
182 |
\item \bl{$<\!red\!>$} \bl{$<\!\slash{}red\!>$} start/end red (cyan, etc)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
183 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
184 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
185 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
186 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
187 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
188 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
189 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
190 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
191 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
192 |
\begin{frame}[c]
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
193 |
\frametitle{\begin{tabular}{c}Interpreting a List of Tokens\end{tabular}}
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
194 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
195 |
The lexer cannot prevent errors like
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
196 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
197 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
198 |
\bl{$<\!b\!>$} \ldots \bl{$<\!p\!>$} \ldots \bl{$<\!\slash{}b\!>$} \ldots \bl{$<\!\slash{}p\!>$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
199 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
200 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
201 |
or
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
202 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
203 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
204 |
\bl{$<\!\slash{}b\!>$} \ldots \bl{$<\!b\!>$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
205 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
206 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
207 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
208 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
209 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
210 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
211 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
212 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
213 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
214 |
\frametitle{\begin{tabular}{c}Parser Combinators\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
215 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
216 |
Parser combinators: \bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
217 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
218 |
\begin{minipage}{1.1\textwidth}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
219 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
220 |
\mbox{}\hspace{-12mm}\mbox{}$\underbrace{\text{list of tokens}}_{\text{input}}$ \bl{$\Rightarrow$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
221 |
$\underbrace{\text{set of (parsed input, unparsed input)}}_{\text{output}}$
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
222 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
223 |
\end{minipage}\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
224 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
225 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
226 |
\item sequencing
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
227 |
\item alternative
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
228 |
\item semantic action
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
229 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
230 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
231 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
232 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
233 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
234 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
235 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
236 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
237 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
238 |
Alternative parser (code \bl{$p\;||\;q$})\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
239 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
240 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
241 |
\item apply \bl{$p$} and also \bl{$q$}; then combine the outputs
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
242 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
243 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
244 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
245 |
\large \bl{$p(\text{input}) \cup q(\text{input})$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
246 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
247 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
248 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
249 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
250 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
251 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
252 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
253 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
254 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
255 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
256 |
Sequence parser (code \bl{$p\sim q$})\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
257 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
258 |
\begin{itemize}
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
259 |
\item apply first \bl{$p$} producing a set of pairs
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
260 |
\item then apply \bl{$q$} to the unparsed parts
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
261 |
\item then combine the results:\\ \mbox{}\;\;((output$_1$, output$_2$), unparsed part)
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
262 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
263 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
264 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
265 |
\begin{tabular}{l}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
266 |
\large \bl{$\{((o_1, o_2), u_2) \;|\;$}\\[2mm]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
267 |
\large\mbox{}\hspace{15mm} \bl{$(o_1, u_1) \in p(\text{input}) \wedge$}\\[2mm]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
268 |
\large\mbox{}\hspace{15mm} \bl{$(o_2, u_2) \in q(u_1)\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
269 |
\end{tabular}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
270 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
271 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
272 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
273 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
274 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
275 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
276 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
277 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
278 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
279 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
280 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
281 |
Function parser (code \bl{$p \Longrightarrow f$})\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
282 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
283 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
284 |
\item apply \bl{$p$} producing a set of pairs
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
285 |
\item then apply the function \bl{$f$} to each first component
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
286 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
287 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
288 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
289 |
\begin{tabular}{l}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
290 |
\large \bl{$\{(f(o_1), u_1) \;|\; (o_1, u_1) \in p(\text{input})\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
291 |
\end{tabular}
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
292 |
\end{center}\bigskip\bigskip\pause
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
293 |
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
294 |
\bl{$f$} is the semantic action (``what to do with the parsed input'')
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
295 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
296 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
297 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
298 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
299 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
300 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
301 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
302 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
303 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
304 |
Token parser:\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
305 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
306 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
307 |
\item if the input is
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
308 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
309 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
310 |
\large \bl{$tok_1:: tok_2 :: \ldots :: tok_n$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
311 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
312 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
313 |
then return
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
314 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
315 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
316 |
\large \bl{$\{(tok_1,\; tok_2 :: \ldots :: tok_n)\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
317 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
318 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
319 |
or
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
320 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
321 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
322 |
\large \bl{$\{\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
323 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
324 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
325 |
if \bl{$tok_1$} is not the right token we are looking for
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
326 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
327 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
328 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
329 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
330 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
331 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
332 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
333 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
334 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
335 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
336 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
337 |
Number-Token parser:\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
338 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
339 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
340 |
\item if the input is
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
341 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
342 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
343 |
\large \bl{$num\_tok(42):: tok_2 :: \ldots :: tok_n$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
344 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
345 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
346 |
then return
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
347 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
348 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
349 |
\large \bl{$\{(42,\; tok_2 :: \ldots :: tok_n)\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
350 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
351 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
352 |
or
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
353 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
354 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
355 |
\large \bl{$\{\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
356 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
357 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
358 |
if \bl{$tok_1$} is not the right token we are looking for
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
359 |
\end{itemize}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
360 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
361 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
362 |
list of tokens \bl{$\Rightarrow$} set of (\alert{int}, list of tokens)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
363 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
364 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
365 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
366 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
367 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
368 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
369 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
370 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
371 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
372 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
373 |
\item if the input is
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
374 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
375 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
376 |
\begin{tabular}{l}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
377 |
\large \bl{$num\_tok(42)::$}\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
378 |
\hspace{7mm}\large \bl{$num\_tok(3) ::$}\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
379 |
\hspace{14mm}\large \bl{$tok_3 :: \ldots :: tok_n$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
380 |
\end{tabular}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
381 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
382 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
383 |
and the parser is
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
384 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
385 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
386 |
\bl{$ntp \sim ntp$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
387 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
388 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
389 |
the successful output will be
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
390 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
391 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
392 |
\large \bl{$\{((42, 3),\; tok_2 :: \ldots :: tok_n)\}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
393 |
\end{center}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
394 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
395 |
Now we can form
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
396 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
397 |
\bl{$(ntp \sim ntp) \Longrightarrow f$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
398 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
399 |
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
400 |
where \bl{$f$} is the semantic action (``what to do with the pair'')
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
401 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
402 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
403 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
404 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
405 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
406 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
407 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
408 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
409 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
410 |
\frametitle{\begin{tabular}{c}Semantic Actions\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
411 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
412 |
Addition
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
413 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
414 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
415 |
\bl{$T \sim + \sim E \Longrightarrow \underbrace{f((x,y), z) \Rightarrow x + z}_{\text{semantic action}}$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
416 |
\end{center}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
417 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
418 |
Multiplication
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
419 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
420 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
421 |
\bl{$F \sim * \sim T \Longrightarrow f((x,y), z) \Rightarrow x * z$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
422 |
\end{center}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
423 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
424 |
Parenthesis
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
425 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
426 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
427 |
\bl{$\text{(} \sim E \sim \text{)} \Longrightarrow f((x,y), z) \Rightarrow y$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
428 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
429 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
430 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
431 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
432 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
433 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
434 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
435 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
436 |
\frametitle{\begin{tabular}{c}Types of Parsers\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
437 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
438 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
439 |
\item {\bf Sequencing}: if \bl{$p$} returns results of type \bl{$T$}, and \bl{$q$} results of type \bl{$S$},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
440 |
then \bl{$p \sim q$} returns results of type
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
441 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
442 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
443 |
\bl{$T \times S$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
444 |
\end{center}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
445 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
446 |
\item {\bf Alternative}: if \bl{$p$} returns results of type \bl{$T$} then \bl{$q$} \alert{must} also have results of type \bl{$T$},
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
447 |
and \bl{$p \;||\; q$} returns results of type
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
448 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
449 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
450 |
\bl{$T$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
451 |
\end{center}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
452 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
453 |
\item {\bf Semantic Action}: if \bl{$p$} returns results of type \bl{$T$} and \bl{$f$} is a function from
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
454 |
\bl{$T$} to \bl{$S$}, then
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
455 |
\bl{$p \Longrightarrow f$} returns results of type
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
456 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
457 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
458 |
\bl{$S$}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
459 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
460 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
461 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
462 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
463 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
464 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
465 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
466 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
467 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
468 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
469 |
\frametitle{\begin{tabular}{c}Input Types of Parsers\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
470 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
471 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
472 |
\item input: \alert{list of tokens}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
473 |
\item output: set of (output\_type, \alert{list of tokens})
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
474 |
\end{itemize}\bigskip\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
475 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
476 |
actually it can be any input type as long as it is a kind of sequence
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
477 |
(for example a string)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
478 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
479 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
480 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
481 |
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
482 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
483 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
484 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
485 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
486 |
\frametitle{\begin{tabular}{c}Scannerless Parsers\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
487 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
488 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
489 |
\item input: \alert{string}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
490 |
\item output: set of (output\_type, \alert{string})
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
491 |
\end{itemize}\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
492 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
493 |
but lexers are better when whitespaces or comments need to be filtered out
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
494 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
495 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
496 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
497 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
498 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
499 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
500 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
501 |
\frametitle{\begin{tabular}{c}Successful Parses\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
502 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
503 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
504 |
\item input: string
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
505 |
\item output: \alert{set of} (output\_type, string)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
506 |
\end{itemize}\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
507 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
508 |
a parse is successful whenever the input has been
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
509 |
fully ``consumed'' (that is the second component is empty)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
510 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
511 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
512 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
513 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
514 |
|
66
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
515 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
516 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
517 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
518 |
{\lstset{language=Scala}\fontsize{10}{12}\selectfont
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
519 |
\texttt{\lstinputlisting{app7.scala}}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
520 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
521 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
522 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
523 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
524 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
525 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
526 |
{\lstset{language=Scala}\fontsize{10}{12}\selectfont
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
527 |
\texttt{\lstinputlisting{app7.scala}}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
528 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
529 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
530 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
531 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
532 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
533 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
534 |
{\lstset{language=Scala}\fontsize{10}{12}\selectfont
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
535 |
\texttt{\lstinputlisting{app8.scala}}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
536 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
537 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
538 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
539 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
540 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
541 |
\begin{frame}[c]
|
65
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
542 |
\frametitle{\begin{tabular}{c}Two Grammars\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
543 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
544 |
Which languages are recognised by the following two grammars?
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
545 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
546 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
547 |
\bl{\begin{tabular}{lcl}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
548 |
$S$ & $\rightarrow$ & $1 \cdot S \cdot S$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
549 |
& $|$ & $\epsilon$
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
550 |
\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
551 |
\end{center}\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
552 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
553 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
554 |
\bl{\begin{tabular}{lcl}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
555 |
$U$ & $\rightarrow$ & $1 \cdot U$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
556 |
& $|$ & $\epsilon$
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
557 |
\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
558 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
559 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
560 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
561 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
562 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
563 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
564 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
565 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
566 |
\begin{frame}[t]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
567 |
\frametitle{\begin{tabular}{c}Ambiguous Grammars\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
568 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
569 |
\mbox{}\\[-25mm]\mbox{}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
570 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
571 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
572 |
\begin{tikzpicture}[y=.2cm, x=.009cm]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
573 |
%axis
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
574 |
\draw (0,0) -- coordinate (x axis mid) (1000,0);
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
575 |
\draw (0,0) -- coordinate (y axis mid) (0,30);
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
576 |
%ticks
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
577 |
\foreach \x in {0, 20, 100, 200,...,1000}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
578 |
\draw (\x,1pt) -- (\x,-3pt)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
579 |
node[anchor=north] {\small \x};
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
580 |
\foreach \y in {0,5,...,30}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
581 |
\draw (1pt,\y) -- (-3pt,\y)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
582 |
node[anchor=east] {\small\y};
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
583 |
%labels
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
584 |
\node[below=0.6cm] at (x axis mid) {\bl{1}s};
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
585 |
\node[rotate=90, left=1.2cm] at (y axis mid) {secs};
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
586 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
587 |
%plots
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
588 |
\draw[color=blue] plot[mark=*, mark options={fill=white}]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
589 |
file {s-grammar1.data};
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
590 |
\only<2->{\draw[color=red] plot[mark=triangle*, mark options={fill=white} ]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
591 |
file {s-grammar2.data};}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
592 |
%legend
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
593 |
\begin{scope}[shift={(400,20)}]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
594 |
\draw[color=blue] (0,0) --
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
595 |
plot[mark=*, mark options={fill=white}] (0.25,0) -- (0.5,0)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
596 |
node[right]{\small unambiguous};
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
597 |
\only<2->{\draw[yshift=\baselineskip, color=red] (0,0) --
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
598 |
plot[mark=triangle*, mark options={fill=white}] (0.25,0) -- (0.5,0)
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
599 |
node[right]{\small ambiguous};}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
600 |
\end{scope}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
601 |
\end{tikzpicture}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
602 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
603 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
604 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
605 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
606 |
|
67
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
607 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
608 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
609 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
610 |
\frametitle{\begin{tabular}{c}What about Left-Recursion?\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
611 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
612 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
613 |
\item we record when we recursively called a parser\bigskip
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
614 |
\item whenever the is a recursion, the parser must have consumed something --- so
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
615 |
we can decrease the input string/list of token by one (at the end)
|
67
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
616 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
617 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
618 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
619 |
|
69
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
620 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
621 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
622 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
623 |
\frametitle{\begin{tabular}{c}While-Language\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
624 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
625 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
626 |
\begin{center}
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
627 |
\bl{\begin{tabular}{@{}lcl@{}}
|
69
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
628 |
$Stmt$ & $\rightarrow$ & $\text{skip}$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
629 |
& $|$ & $Id := AExp$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
630 |
& $|$ & $\text{if}\; B\!Exp \;\text{then}\; Block \;\text{else}\; Block$\\
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
631 |
& $|$ & $\text{while}\; B\!Exp \;\text{do}\; Block$\medskip\\
|
76
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
632 |
$Stmts$ & $\rightarrow$ & $Stmt \;\text{;}\; Stmts$\\
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
633 |
& $|$ & $Stmt$\medskip\\
|
69
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
634 |
$Block$ & $\rightarrow$ & $\{ Stmts \}$\\
|
70
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
635 |
& $|$ & $Stmt$\medskip\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
636 |
$AExp$ & $\rightarrow$ & \ldots\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
637 |
$BExp$ & $\rightarrow$ & \ldots\\
|
69
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
638 |
\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
639 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
640 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
641 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
642 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
643 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
644 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
645 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
646 |
\mode<presentation>{
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
647 |
\begin{frame}[c]
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
648 |
\frametitle{\begin{tabular}{c}An Interpreter\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
649 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
650 |
\begin{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
651 |
\bl{\begin{tabular}{l}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
652 |
$\{$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
653 |
\;\;$x := 5 \text{;}$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
654 |
\;\;$y := x * 3\text{;}$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
655 |
\;\;$y := x * 4\text{;}$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
656 |
\;\;$x := u * 3$\\
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
657 |
$\}$
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
658 |
\end{tabular}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
659 |
\end{center}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
660 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
661 |
\begin{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
662 |
\item the interpreter has to record the value of \bl{$x$} before assigning a value to \bl{$y$}\pause
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
663 |
\item \bl{\text{eval}(stmt, env)}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
664 |
\end{itemize}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
665 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
666 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
667 |
\end{frame}}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
668 |
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
diff
changeset
|
669 |
|
65
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
670 |
\end{document}
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
671 |
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
672 |
%%% Local Variables:
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
673 |
%%% mode: latex
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
674 |
%%% TeX-master: t
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
675 |
%%% End:
|
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff
changeset
|
676 |
|