[Boost-commit] svn:boost r64350 - trunk/tools/build/v2/util

Subject: [Boost-commit] svn:boost r64350 - trunk/tools/build/v2/util
From: ghost_at_[hidden]
Date: 2010-07-26 04:07:08

Author: vladimir_prus
Date: 2010-07-26 04:07:07 EDT (Mon, 26 Jul 2010)
New Revision: 64350
URL: http://svn.boost.org/trac/boost/changeset/64350

Log:
Add decorator for caching function results.

Text files modified: 
   trunk/tools/build/v2/util/__init__.py |    21 +++++++++++++++++++++                   
   1 files changed, 21 insertions(+), 0 deletions(-)

Modified: trunk/tools/build/v2/util/__init__.py
==============================================================================
--- trunk/tools/build/v2/util/__init__.py	(original)
+++ trunk/tools/build/v2/util/__init__.py	2010-07-26 04:07:07 EDT (Mon, 26 Jul 2010)
@@ -1,4 +1,5 @@
 
+# Decorator the specifies bjam-side prototype for a Python function
 def bjam_signature(s):
 
     def wrap(f):       
@@ -6,3 +7,23 @@
         return f
 
     return wrap
+
+class cached(object):
+
+    def __init__(self, function):
+        self.function = function
+        self.cache = {}
+
+    def __call__(self, *args):
+        try:
+            return self.cache[args]
+        except KeyError:
+            v = self.function(*args)
+            self.cache[args] = v
+            return v    
+
+def unquote(s):
+    if s and s[0] == '"' and s[-1] == '"':
+        return s[1:-1]
+    else:
+        return s