How not to Design a Scripting Language Paul Biggar Department of - - PowerPoint PPT Presentation
Introduction How not to design a scripting language How not to Design a Scripting Language Paul Biggar Department of Computer Science and Statistics Trinity College Dublin StackOverflow London, 28th October, 2009 How not to Design a Scripting
Introduction How not to design a scripting language
Paul Biggar
Department of Computer Science and Statistics Trinity College Dublin
StackOverflow London, 28th October, 2009
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
PhD Dissertation
Design and Implementation of an Ahead-of-time PHP Compiler phc (http://phpcompiler.org)
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
Common Features:
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
NOT THE DRAGON BOOK
Engineering a Compiler by Cooper/Torczon Modern Compiler Implementation in X by Appel
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
interpreter.
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
1 Elegant and well designed,
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
1 Elegant and well designed, 2 High level of abstraction,
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
1 Elegant and well designed, 2 High level of abstraction, 3 Dynamic typing (and duck typing).
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
Symptoms: Speed, Portability
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
Symptoms: Speed, Portability Problem: Language designed for interpreters
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language
Symptoms: Speed, Portability Problem: Language designed for one specific interpreter
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
Foreign Function Interface based on CPython interpreter
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
Don’t expose yourself!
Language is good
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
Don’t expose yourself!
Language is good
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
Don’t expose yourself!
Language is good
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language FFI
Don’t expose yourself!
Language is good
any modifications
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
eval (mysql_read (...)[0]);
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
username = "myname" password = "mypass" server = "srv.domain.com"
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
$lang = ....; include ("localisation/locale.$lang.php");
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Downsides:
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Downsides:
t = ...; for (i = 0; i < strlen(t); i++) { s[i] = t[i]; }
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Downsides:
t = ...; _temp = strlen(t); for (i = 0; i < _temp; i++) { s[i] = t[i]; }
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Downsides:
alert ($(’li’).get(0).nodeName);
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Downsides:
alert ($(’li’)[0].nodeName);
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Tracemonkey
http://hacks.mozilla.org/2009/07/tracemonkey-overview/
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
Tracemonkey
http://hacks.mozilla.org/2009/07/tracemonkey-overview/
Type Analysis for Javascript
Simon Holm Jensen, Anders Møller and Peter Thiemann SAS ’09 http://www.brics.dk/TAJS/
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar
Introduction How not to design a scripting language Compiled and interpreted models
How not to Design a Scripting Language Paul Biggar