diff options
Diffstat (limited to 'src/urweb.grm')
| -rw-r--r-- | src/urweb.grm | 118 |
1 files changed, 51 insertions, 67 deletions
diff --git a/src/urweb.grm b/src/urweb.grm index bfb230a6..638ede12 100644 --- a/src/urweb.grm +++ b/src/urweb.grm @@ -178,6 +178,11 @@ datatype prop_kind = Delete | Update datatype attr = Class of exp | Normal of con * exp +fun patType loc (p : pat) = + case #1 p of + PAnnot (_, t) => t + | _ => (CWild (KType, loc), loc) + %% %header (functor UrwebLrValsFn(structure Token : TOKEN)) @@ -290,6 +295,7 @@ datatype attr = Class of exp | Normal of con * exp | earg of exp * con -> exp * con | eargp of exp * con -> exp * con + | earga of exp * con -> exp * con | eargs of exp * con -> exp * con | eargl of exp * con -> exp * con | eargl2 of exp * con -> exp * con @@ -297,6 +303,7 @@ datatype attr = Class of exp | Normal of con * exp | branch of pat * exp | branchs of (pat * exp) list | pat of pat + | patS of pat | pterm of pat | rpat of (string * pat) list * bool | ptuple of pat list @@ -971,79 +978,53 @@ eargl : eargp eargp (eargp1 o eargp2) eargl2 : (fn x => x) | eargp eargl2 (eargp o eargl2) -earg : SYMBOL kcolon kind (fn (e, t) => - let - val loc = s (SYMBOLleft, kindright) - in - ((ECAbs (kcolon, SYMBOL, kind, e), loc), - (TCFun (kcolon, SYMBOL, kind, t), loc)) - end) - | SYMBOL COLON cexp (fn (e, t) => +earg : patS (fn (e, t) => let - val loc = s (SYMBOLleft, cexpright) + val loc = s (patSleft, patSright) + val pt = patType loc patS + + val e' = case #1 patS of + PVar x => (EAbs (x, NONE, e), loc) + | _ => (EAbs ("$x", SOME pt, + (ECase ((EVar ([], "$x", DontInfer), + loc), + [(patS, e)]), loc)), loc) in - ((EAbs (SYMBOL, SOME cexp, e), loc), - (TFun (cexp, t), loc)) + (e', (TFun (pt, t), loc)) end) - | UNDER COLON cexp (fn (e, t) => - let - val loc = s (UNDERleft, cexpright) - in - ((EAbs ("_", SOME cexp, e), loc), - (TFun (cexp, t), loc)) - end) - | eargp (eargp) + | earga (earga) -eargp : SYMBOL (fn (e, t) => - let - val loc = s (SYMBOLleft, SYMBOLright) - in - ((EAbs (SYMBOL, NONE, e), loc), - (TFun ((CWild (KType, loc), loc), t), loc)) - end) - | UNIT (fn (e, t) => +eargp : pterm (fn (e, t) => let - val loc = s (UNITleft, UNITright) - val t' = (TRecord (CRecord [], loc), loc) + val loc = s (ptermleft, ptermright) + val pt = patType loc pterm + + val e' = case #1 pterm of + PVar x => (EAbs (x, NONE, e), loc) + | _ => (EAbs ("$x", SOME pt, + (ECase ((EVar ([], "$x", DontInfer), + loc), + [(pterm, e)]), loc)), loc) in - ((EAbs ("_", SOME t', e), loc), - (TFun (t', t), loc)) + (e', (TFun (pt, t), loc)) end) - | UNDER (fn (e, t) => - let - val loc = s (UNDERleft, UNDERright) - in - ((EAbs ("_", NONE, e), loc), - (TFun ((CWild (KType, loc), loc), t), loc)) - end) - | LPAREN SYMBOL kcolon kind RPAREN(fn (e, t) => + | earga (earga) + +earga : LBRACK SYMBOL RBRACK (fn (e, t) => let - val loc = s (LPARENleft, RPARENright) + val loc = s (LBRACKleft, RBRACKright) + val kind = (KWild, loc) + in + ((ECAbs (Implicit, SYMBOL, kind, e), loc), + (TCFun (Implicit, SYMBOL, kind, t), loc)) + end) + | LBRACK SYMBOL kcolon kind RBRACK(fn (e, t) => + let + val loc = s (LBRACKleft, RBRACKright) in ((ECAbs (kcolon, SYMBOL, kind, e), loc), (TCFun (kcolon, SYMBOL, kind, t), loc)) end) - | LPAREN SYMBOL COLON cexp RPAREN (fn (e, t) => - let - val loc = s (LPARENleft, RPARENright) - in - ((EAbs (SYMBOL, SOME cexp, e), loc), - (TFun (cexp, t), loc)) - end) - | LPAREN UNDER COLON cexp RPAREN (fn (e, t) => - let - val loc = s (LPARENleft, RPARENright) - in - ((EAbs ("_", SOME cexp, e), loc), - (TFun (cexp, t), loc)) - end) - | LPAREN cexp TWIDDLE cexp RPAREN (fn (e, t) => - let - val loc = s (LPARENleft, RPARENright) - in - ((EDisjoint (cexp1, cexp2, e), loc), - (TDisjoint (cexp1, cexp2, t), loc)) - end) | LBRACK cexp TWIDDLE cexp RBRACK(fn (e, t) => let val loc = s (LBRACKleft, RBRACKright) @@ -1051,7 +1032,7 @@ eargp : SYMBOL (fn (e, t) => ((EDisjoint (cexp1, cexp2, e), loc), (TDisjoint (cexp1, cexp2, t), loc)) end) - | CSYMBOL (fn (e, t) => + | LBRACK CSYMBOL RBRACK (fn (e, t) => let val loc = s (CSYMBOLleft, CSYMBOLright) in @@ -1214,15 +1195,18 @@ branch : pat DARROW eexp (pat, eexp) branchs: ([]) | BAR branch branchs (branch :: branchs) -pat : pterm (pterm) - | cpath pterm (PCon (#1 cpath, #2 cpath, SOME pterm), s (cpathleft, ptermright)) - | pterm DCOLON pat (let - val loc = s (ptermleft, patright) +patS : pterm (pterm) + | pterm DCOLON patS (let + val loc = s (ptermleft, patSright) in (PCon (["Basis"], "Cons", SOME (PRecord ([("1", pterm), - ("2", pat)], false), loc)), + ("2", patS)], false), loc)), loc) end) + | patS COLON cexp (PAnnot (patS, cexp), s (patSleft, cexpright)) + +pat : patS (patS) + | cpath pterm (PCon (#1 cpath, #2 cpath, SOME pterm), s (cpathleft, ptermright)) pterm : SYMBOL (PVar SYMBOL, s (SYMBOLleft, SYMBOLright)) | cpath (PCon (#1 cpath, #2 cpath, NONE), s (cpathleft, cpathright)) |