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Introducing GF.Text.Pretty for more concise pretty printers and GF.Infra.Location for modularity

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GF.Text.Pretty provides the class Pretty and overloaded versions of the pretty
printing combinators in Text.PrettyPrint, allowing pretty printable values to
be used directly instead of first having to convert them to Doc with functions
like text, int, char and ppIdent. Some modules have been converted to use
GF.Text.Pretty, but not all. Precedences could be added to simplify the pretty
printers for terms and patterns.

GF.Infra.Location contains the types Location and L, factored out from
GF.Grammar.Grammar, and the class HasSourcePath. This allowed the import
of GF.Grammar.Grammar to be removed from GF.Infra.CheckM, making it more
like a pure library module.
This commit is contained in:
hallgren
2014-07-27 22:06:23 +00:00
parent b154361e24
commit f27d509075
22 changed files with 422 additions and 451 deletions
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20
src/compiler/GF/Grammar/PatternMatch.hs
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@@ -22,20 +22,20 @@ import GF.Data.Operations
import GF.Grammar.Grammar
import GF.Infra.Ident
import GF.Grammar.Macros
import GF.Grammar.Printer
--import GF.Grammar.Printer
--import Data.List
import Control.Monad
import Text.PrettyPrint
import GF.Text.Pretty
--import Debug.Trace
matchPattern :: ErrorMonad m => [(Patt,rhs)] -> Term -> m (rhs, Substitution)
matchPattern pts term =
if not (isInConstantForm term)
then raise (render (text "variables occur in" <+> ppTerm Unqualified 0 term))
then raise (render ("variables occur in" <+> pp term))
else do
term' <- mkK term
errIn (render (text "trying patterns" <+> hsep (punctuate comma (map (ppPatt Unqualified 0 . fst) pts)))) $
errIn (render ("trying patterns" <+> hsep (punctuate ',' (map fst pts)))) $
findMatch [([p],t) | (p,t) <- pts] [term']
where
-- to capture all Str with string pattern matching
@@ -49,7 +49,7 @@ matchPattern pts term =
K w -> return [w]
C v w -> liftM2 (++) (getS v) (getS w)
Empty -> return []
_ -> raise (render (text "cannot get string from" <+> ppTerm Unqualified 0 s))
_ -> raise (render ("cannot get string from" <+> s))
testOvershadow :: ErrorMonad m => [Patt] -> [Term] -> m [Patt]
testOvershadow pts vs = do
@@ -60,10 +60,10 @@ testOvershadow pts vs = do
findMatch :: ErrorMonad m => [([Patt],rhs)] -> [Term] -> m (rhs, Substitution)
findMatch cases terms = case cases of
[] -> raise (render (text "no applicable case for" <+> hsep (punctuate comma (map (ppTerm Unqualified 0) terms))))
[] -> raise (render ("no applicable case for" <+> hsep (punctuate ',' terms)))
(patts,_):_ | length patts /= length terms ->
raise (render (text "wrong number of args for patterns :" <+> hsep (map (ppPatt Unqualified 0) patts) <+>
text "cannot take" <+> hsep (map (ppTerm Unqualified 0) terms)))
raise (render ("wrong number of args for patterns :" <+> hsep patts <+>
"cannot take" <+> hsep terms))
(patts,val):cc -> case mapM tryMatch (zip patts terms) of
Ok substs -> return (val, concat substs)
_ -> findMatch cc terms
@@ -116,7 +116,7 @@ tryMatch (p,t) = do
(PNeg p',_) -> case tryMatch (p',t) of
Bad _ -> return []
_ -> raise (render (text "no match with negative pattern" <+> ppPatt Unqualified 0 p))
_ -> raise (render ("no match with negative pattern" <+> p))
(PSeq p1 p2, ([],K s, [])) -> matchPSeq p1 p2 s
(PMSeq mp1 mp2, ([],K s, [])) -> matchPMSeq mp1 mp2 s
@@ -130,7 +130,7 @@ tryMatch (p,t) = do
(PChar, ([],K [_], [])) -> return []
(PChars cs, ([],K [c], [])) | elem c cs -> return []
_ -> raise (render (text "no match in case expr for" <+> ppTerm Unqualified 0 t))
_ -> raise (render ("no match in case expr for" <+> t))
matchPMSeq (m1,p1) (m2,p2) s = matchPSeq' m1 p1 m2 p2 s
--matchPSeq p1 p2 s = matchPSeq' (0,maxBound::Int) p1 (0,maxBound::Int) p2 s