29 Mar
2009
29 Mar
'09
8:01 p.m.
It looks like the scope is interrupted just above $( ... ) - but I'd like to know why and find a more beautiful way than just moving all th calls to the bottom of the module file :)
Top-level splices can introduce bindings. IIRC, the current TH implementation uses a simple sequencing approach, preventing splices to be part of a recursive dependency chain. If you have A; $(S); B then first A is compiled, then S, then B. So, B can refer to what S builds, but neither A nor S can refer to B. Btw, there is a TH mailing list, and a wiki page with links to tutorials and papers, needed given the sparsity of the Haddocks: http://www.haskell.org/haskellwiki/Template_Haskell Claus