Arguments are passed in the same order for both built-in and MFL-level

functions.

If a builtin takes optional arguments, the actual number of arguments is
passed in a hidden first argument.  This allows to discern between zero 
arguments (emtpy strings) and absent arguments.



git-svn-id: file:///svnroot/mailfromd/trunk@1461 7a8a7f39-df28-0410-adc6-e0d955640f24

1 files changed, 26 insertions, 3 deletions

diff --git a/TODO b/TODO
index 97fbe729..f5289056 100644
--- a/TODO
+++ b/TODO
@@ -10,9 +10,6 @@ Mailfromd TODO list.
 
 ** Implement still more string functions
 
-* If an optional numeric argument to a built-in function has value 0 it is
-impossible to tell whether it was given explicitely or omitted.
-
 * Provide a library facility:
 
 1. Compile mailfromd source into a position-independent code:
@@ -29,6 +26,32 @@ impossible to tell whether it was given explicitely or omitted.
 
   mailfromd -lfile   
 
+* Convert database support to MFL
+
+* Implement a separate configuration file, to get rid of `#pragma option' in
+filter sources.
+
+* Provide a mechanism to catch exceptions for a given compound statement or
+expression.
+
+* Implement nested functions and lambdas:
+
+  set var lambda(string x) returns string
+          do
+              ...
+          done
+  apply(%var, "foo")
+
+or:
+
+  apply(lambda(string x) returns string
+        do
+           ...
+        done,
+        "foo")
+
+This can then be used to implement the previous topic.
+                                                
 
 Local variables:
 mode: outline