Eror message comprehensibility
Russel Winder
russel at russel.org.uk
Wed Nov 17 04:12:29 PST 2010
I had accidentally written:
immutable pi = 4.0 * reduce ! ( "a + b" ) ( 0 , outputData ) * delta ;
the error message received was:
Error: template instance std.algorithm.reduce!("a + b").reduce!(int,Map!(partialSum,Tuple!(int,int,double)[])) error instantiating
which isn't wrong, but neither is it that helpful. Actually it is
helpful at all really. Is there no way of saying in a more clear manner
"reduce initial value is an int but the type in the array is double so
they are not addition compatible."?
The correct line is of course:
immutable pi = 4.0 * reduce ! ( "a + b" ) ( 0.0 , outputData ) * delta ;
but that isn't easily deducible from the error message presented.
--
Russel.
=============================================================================
Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.winder at ekiga.net
41 Buckmaster Road m: +44 7770 465 077 xmpp: russel at russel.org.uk
London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder
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