[Rcpp-commits] r1592 - pkg/Rcpp

[noreply at r-forge.r-project.org]

Author: romain
Date: 2010-06-18 10:38:16 +0200 (Fri, 18 Jun 2010)
New Revision: 1592

Modified:
   pkg/Rcpp/TODO
Log:
TODO: added comment on SingleLogicalResult

Modified: pkg/Rcpp/TODO
===================================================================
--- pkg/Rcpp/TODO	2010-06-18 08:37:47 UTC (rev 1591)
+++ pkg/Rcpp/TODO	2010-06-18 08:38:16 UTC (rev 1592)
@@ -77,8 +77,22 @@
     	IntegerVector xx(20) ;
     	xx[ range(0,9) ] = seq_len(10 ) ;
     
-    o		
+    o	SingleLogicalResult does not have an operator bool() because of R missing 
+		values. So we need is_true, is_false and is_na for SingleLogicalResult
+		objects so that we can do: 
+		
+		if( is_true( all( x < 5 ) ) ){
+			...
+		}
     	
+		We can already do 
+		
+		if( all( x < 5 ).is_true() ){
+			...
+		}
+    	
+		but the syntax above seems more natural. maybe not.
+		
 Testing
 
 	o	we need to update the doRUnit.R file and replace :