Unicode's greek lambda

[Ross Paterson]

On Tue, Nov 18, 2008 at 10:30:01AM +0000, Malcolm Wallace wrote:
> > When the -XUnicodeSyntax option is specified, GHC accepts some Unicode
> > characters including left/right arrows. Unfortunately, the letter
> > "greek lambda" cannot be used. Are there any technical reasons to not
> > accept it?
> 
> The "greek lambda" is a normal lower-case alphabetic character - it can
> be used in identifier names.

But it could be a reserved word synonymous with \.  After all, \ can
occur in operator symbols, but the operator \ is reserved.