14 May
2003
14 May
'03
2:58 p.m.
hello, Simon Peyton-Jones wrote:
It is undoubtedly odd that adding an instance declaration makes a legal program illegal, and that might be a reason for relaxing the rule... but it's not entirely easy to implement such a relaxation.
this has always been the case, unless i am misunderstanding what you are saying. for exampel adding the instance: instance Show Int will make any valid program invalid bye iavor