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fix the precedence for patterns ~, - and @

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krasimir
2010-03-18 19:52:45 +00:00
parent 0c2944fa7f
commit b2c785edfa
2 changed files with 16 additions and 12 deletions
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16
src/compiler/GF/Grammar/Parser.y
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@@ -426,7 +426,7 @@ Exp4
| 'pre' '{' String ';' ListAltern '}' { Alts (K $3, $5) }
| 'pre' '{' Ident ';' ListAltern '}' { Alts (Vr $3, $5) }
| 'strs' '{' ListExp '}' { Strs $3 }
| '#' Patt2 { EPatt $2 }
| '#' Patt3 { EPatt $2 }
| 'pattern' Exp5 { EPattType $2 }
| 'lincat' Ident Exp5 { ELincat $2 $3 }
| 'lin' Ident Exp5 { ELin $2 $3 }
@@ -477,18 +477,22 @@ Patt1 :: { Patt }
Patt1
: Ident ListPatt { PC $1 $2 }
| Ident '.' Ident ListPatt { PP $1 $3 $4 }
| Patt2 '*' { PRep $1 }
| Ident '@' Patt2 { PAs $1 $3 }
| '-' Patt2 { PNeg $2 }
| Patt3 '*' { PRep $1 }
| Patt2 { $1 }
Patt2 :: { Patt }
Patt2
: Ident '@' Patt3 { PAs $1 $3 }
| '-' Patt3 { PNeg $2 }
| '~' Exp6 { PTilde $2 }
| Patt3 { $1 }
Patt3 :: { Patt }
Patt3
: '?' { PChar }
| '[' String ']' { PChars $2 }
| '#' Ident { PMacro $2 }
| '#' Ident '.' Ident { PM $2 $4 }
| '~' Exp6 { PTilde $2 }
| '_' { PW }
| Ident { PV $1 }
| Ident '.' Ident { PP $1 $3 [] }
@@ -529,7 +533,7 @@ ListPatt
PattArg :: { Patt }
: Patt2 { $1 }
| '{' Patt2 '}' { PImplArg $2 }
| '{' Patt '}' { PImplArg $2 }
Arg :: { [(BindType,Ident)] }
Arg

12
src/compiler/GF/Grammar/Printer.hs
View File

@@ -190,13 +190,13 @@ ppPatt q d (PAlt p1 p2) = prec d 0 (ppPatt q 0 p1 <+> char '|' <+> ppPatt q 1 p2
ppPatt q d (PSeq p1 p2) = prec d 0 (ppPatt q 0 p1 <+> char '+' <+> ppPatt q 1 p2)
ppPatt q d (PC f ps) = if null ps
then ppIdent f
else prec d 1 (ppIdent f <+> hsep (map (ppPatt q 2) ps))
else prec d 1 (ppIdent f <+> hsep (map (ppPatt q 3) ps))
ppPatt q d (PP f g ps) = if null ps
then ppQIdent q f g
else prec d 1 (ppQIdent q f g <+> hsep (map (ppPatt q 2) ps))
ppPatt q d (PRep p) = prec d 1 (ppPatt q 2 p <> char '*')
ppPatt q d (PAs f p) = prec d 1 (ppIdent f <> char '@' <> ppPatt q 2 p)
ppPatt q d (PNeg p) = prec d 1 (char '-' <> ppPatt q 2 p)
else prec d 1 (ppQIdent q f g <+> hsep (map (ppPatt q 3) ps))
ppPatt q d (PRep p) = prec d 1 (ppPatt q 3 p <> char '*')
ppPatt q d (PAs f p) = prec d 2 (ppIdent f <> char '@' <> ppPatt q 3 p)
ppPatt q d (PNeg p) = prec d 2 (char '-' <> ppPatt q 3 p)
ppPatt q d (PChar) = char '?'
ppPatt q d (PChars s) = brackets (str s)
ppPatt q d (PMacro id) = char '#' <> ppIdent id
@@ -208,7 +208,7 @@ ppPatt q d (PFloat f) = double f
ppPatt q d (PString s) = str s
ppPatt q d (PR xs) = braces (hsep (punctuate semi [ppLabel l <+> equals <+> ppPatt q 0 e | (l,e) <- xs]))
ppPatt q d (PImplArg p) = braces (ppPatt q 0 p)
ppPatt q d (PTilde t) = char '~' <> ppTerm q 6 t
ppPatt q d (PTilde t) = prec d 2 (char '~' <> ppTerm q 6 t)
ppValue :: TermPrintQual -> Int -> Val -> Doc
ppValue q d (VGen i x) = ppIdent x <> text "{-" <> int i <> text "-}" ---- latter part for debugging