[pypy-svn] r44811 - pypy/extradoc/talk/ep2007/rpython

[antocuni at codespeak.net]

Author: antocuni
Date: Fri Jul  6 22:02:59 2007
New Revision: 44811

Modified:
   pypy/extradoc/talk/ep2007/rpython/rpython.txt
Log:
some edits and some new slides



Modified: pypy/extradoc/talk/ep2007/rpython/rpython.txt
==============================================================================
--- pypy/extradoc/talk/ep2007/rpython/rpython.txt	(original)
+++ pypy/extradoc/talk/ep2007/rpython/rpython.txt	Fri Jul  6 22:02:59 2007
@@ -1,16 +1,21 @@
 
 =======================================================
-RPython: need for speed aka C and C# considered harmful
+RPython: Need for speed
 =======================================================
 
-:Authors: Antonio Cuni (DISI), Maciej Fijalkowski (merlinux GmbH)
+aka: C and C# considered harmful
+================================
+
+:Authors: Antonio Cuni (DISI - University of Genoa), Maciej Fijalkowski (merlinux GmbH)
 :Place: Europython 2007
 :Date: 10 July 2007
 
 Why invent new language?
 ------------------------
 
-* Grown as a side effect of the pypy project
+XXX antocuni: I think this slide makes more sense after the next
+
+* Grown as a side effect of the PyPy project
 
 * Python is too slow for some purposes
 
@@ -21,55 +26,72 @@
 What is RPython?
 ----------------
 
-* Python (every RPython program has the same meaning
-  when run on top of CPython)
+* RPython programs run unmodified on top of CPython
 
 * Restricted subset
 
 * Constructed from live objects - initialization
   is done in Python
 
-* XXX more?
+* Python is the meta-programming language for RPython
+
 
 Restricted, what do you mean?
 -----------------------------
 
-* Full type inference - you cannot mix incompatible types
+* Static type system
 
-* Polymorphic collections (ie list of ints)
+* Full type inference - you cannot mix incompatible types
 
-* No dynamic stuff: switch class, add/remove methods, etc.
+* Polymorphic collections (i.e. list of ints)
 
 * Java-like object model
 
+* No dynamic stuff: switch class, add/remove methods, etc.
+
 * No support for special methods (only __init__ and __del__ works)
 
-* No frames and such stuff
+* No introspection
 
 Example of use case
 -------------------
 
 * Write code
 
-* test/debug on top of CPython
+* Test/debug on top of CPython
 
-* compile
+* Compile
 
-* graph viewer
+* Graph viewer
 
 Type inference
 --------------
 
 XXXX should we really mention that?
 
+::
+
+    def foo():
+        return bar(1, 2) + bar(3, 4.5)
+
+    def bar(a, b):
+        return a+1
+
+* a: Signed U Siged --> Signed
+
+* b: Signed U Float --> Float
+
+* result of bar: Signed + 1 --> Signed
+
+
 Modules restrictions
 --------------------
 
-* few modules work
+* Few modules work
 
-* they have different, more static API (ie open())
+* They have different, more static API (ie open())
 
-* all modules might be used when initializing
+* All modules might be used when initializing
 
 Few more words about file API
 -----------------------------
@@ -94,10 +116,21 @@
 
 * no more pros...
 
-Writing standalone C programs
------------------------------
+Writing standalone C/.NET/JVM programs
+--------------------------------------
+
+::
 
-XXX explain writing targets
+    def target(*args):
+        return entry_point, None
+    
+    def entry_point(argv):
+        print 'Hello World!'
+        return 0
+
+* see also translator/goal/targetnopstandalone.py
+
+* ./translate.py [--backend={c|cli|jvm}] targetXXX.py
 
 Writing CPython extensions
 ---------------------------
@@ -131,6 +164,8 @@
 
 * Live demo
 
+* http://codespeak.net/pypy/dist/pypy/doc/carbonpython.html
+
 
 The JVM backend
 ---------------
@@ -141,6 +176,7 @@
 
 * Not as mature as gencli
 
+* Only executables at the moment
 
 
 The JS backend
@@ -148,3 +184,16 @@
 
 XXX fijal, feel free to fill in
 
+
+Conclusions
+-----------
+
+* RPython has lot of rough edges
+
+* ...but it might be useful in some contexts
+
+* More convenient than C/C++/C#/Java
+
+* Much faster than CPython/IronPython/Jython
+
+* Stay tuned