diff options
Diffstat (limited to 'src/interp')
| -rw-r--r-- | src/interp/i-funsel.boot | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/src/interp/i-funsel.boot b/src/interp/i-funsel.boot index 87aa5bb8..8236dfbc 100644 --- a/src/interp/i-funsel.boot +++ b/src/interp/i-funsel.boot @@ -93,7 +93,7 @@ selectMms(op,args,$declaredMode) == tar := getTarget op dc := getAtree(op,'dollar) - null dc and val and objMode(val) = $AnonymousFunction => + dc = nil and val and objMode(val) = $AnonymousFunction => tree := mkAtree objValUnwrap getValue op putTarget(tree,['Mapping,tar,:types1]) bottomUp tree @@ -115,7 +115,7 @@ selectMms(op,args,$declaredMode) == args.first := tree if numArgs = 1 and (n is "numer" or n is "denom") and - isEqualOrSubDomain(first types1,$Integer) and null dc then + isEqualOrSubDomain(first types1,$Integer) and dc = nil then dc := ['Fraction, $Integer] putAtree(op, 'dollar, dc) @@ -203,7 +203,7 @@ selectMms2(op,tar,args1,args2,$Coerce) == a' := nil a := reverse! removeDuplicates a for x in a repeat - null x => 'iterate + x = nil => 'iterate x is '(RationalRadicals) => a' := [$RationalNumber,:a'] x is ['Union,:l] => -- check if we have a tagged union @@ -231,7 +231,7 @@ selectMms2(op,tar,args1,args2,$Coerce) == -- step 2. if we didn't get one, trying coercing (if we are -- suppose to) - if null(mmS) and $Coerce then + if mmS = nil and $Coerce then a := a' while a repeat x:= first a @@ -481,7 +481,7 @@ getOpArgTypes(opname, args) == x getOpArgTypes1(opname, args) == - null args => nil + args = nil => nil -- special cases first opname is 'coef and args is [b,n] => [first getModeSet b, first getModeSetUseSubdomain n] @@ -512,7 +512,7 @@ argCouldBelongToSubdomain(op, nargs) == v := GETZEROVEC nargs isMap(op) => v mms := getModemapsFromDatabase(op,nargs) - null mms => v + mms = nil => v nargs:=nargs-1 -- each signature has form -- [domain of implementation, target, arg1, arg2, ...] @@ -553,7 +553,7 @@ selectLocalMms(op,name,types,tar) == -- selectLocalMms(op,name,types,tar) == -- mmS := getLocalMms(name,types,tar) -- -- if no target, just return what we got --- mmS and null tar => mmS +-- mmS and tar = nil => mmS -- matchingMms := nil -- for mm in mmS repeat -- [., targ, :.] := mm @@ -599,8 +599,8 @@ mmCost(name, sig,cond,tar,args1,args2) == mmCost0(name, sig,cond,tar,args1,args2) == sigArgs := CDDR sig - n:= - null cond => 1 + n := + cond = nil => 1 not (or/cond) => 1 0 @@ -630,19 +630,19 @@ mmCost0(name, sig,cond,tar,args1,args2) == orderMms(name, mmS,args1,args2,tar) == -- it counts the number of necessary coercions of the argument types -- if this isn't enough, it compares the target types - mmS and null rest mmS => mmS + mmS and rest mmS = nil => mmS mS:= nil N:= nil for mm in MSORT mmS repeat [sig,.,cond]:= mm b:= 'T p:= [m := mmCost(name, sig,cond,tar,args1,args2),:mm] - mS:= - null mS => list p + mS := + mS = nil => list p m < CAAR mS => [p,:mS] S:= mS until b repeat - b:= null rest S or m < CAADR S => + b := rest S = nil or m < CAADR S => S.rest := [p,:rest S] S:= rest S mS @@ -692,7 +692,7 @@ isOpInDomain(opName,dom,nargs) == -- the given number of arguments mmList := objectAssoc(opName,getConstructorOperationsFromDB dom.op) mmList := subCopy(mmList,constructSubst dom) - null mmList => nil + mmList = nil => nil gotOne := nil nargs := nargs + 1 for mm in rest mmList while not gotOne repeat @@ -707,13 +707,13 @@ findCommonSigInDomain(opName,dom,nargs) == dom.op in '(Union Record Mapping) => nil mmList := objectAssoc(opName,getConstructorOperationsFromDB dom.op) mmList := subCopy(mmList,constructSubst dom) - null mmList => nil + mmList = nil => nil gotOne := nil nargs := nargs + 1 vec := nil for mm in rest mmList repeat nargs = #first mm => - null vec => vec := vector first mm + vec = nil => vec := vector first mm for i in 0.. for x in first mm repeat if vec.i and vec.i ~= x then vec.i := nil VEC2LIST vec @@ -722,13 +722,13 @@ findUniqueOpInDomain(op,opName,dom) == -- return function named op in domain dom if unique, choose one if not mmList := objectAssoc(opName,getConstructorOperationsFromDB dom.op) mmList := subCopy(mmList,constructSubst dom) - null mmList => + mmList = nil => throwKeyedMsg("S2IS0021",[opName,dom]) mmList := rest mmList -- ignore the operator name -- use evaluation type context to narrow down the candidate set if target := getTarget op then mmList := [mm for mm in mmList | mm is [=rest target,:.]] - null mmList => throwKeyedMsg("S2IS0062",[opName,target,dom]) + mmList = nil => throwKeyedMsg("S2IS0062",[opName,target,dom]) if #mmList > 1 then mm := selectMostGeneralMm mmList sayKeyedMsg("S2IS0022",[opName,dom,['Mapping,:first mm]]) @@ -771,7 +771,7 @@ findFunctionInDomain(op,dc,tar,args1,args2,$Coerce,$SubDom) == -- looks for a modemap for op with signature args1 -> tar -- in the domain of computation dc -- tar may be nil (= unknown) - null isLegitimateMode(tar, nil, nil) => nil + not isLegitimateMode(tar, nil, nil) => nil dcName:= dc.op dcName in '(Union Record Mapping Enumeration) => -- First cut code that ignores args2, $Coerce and $SubDom @@ -820,7 +820,7 @@ findFunctionInDomain(op,dc,tar,args1,args2,$Coerce,$SubDom) == allOrMatchingMms(mms,args1,tar,dc) == -- if there are exact matches on the arg types, return them -- otherwise return the original list - null mms or null rest mms => mms + mms = nil or rest mms = nil => mms x := nil for mm in mms repeat [sig,:.] := mm @@ -925,7 +925,7 @@ matchMmSig(mm,tar,args1,args2) == [sig,:.]:= mm if CONTAINED('_#, sig) then sig := [replaceSharpCalls COPY t for t in sig] - null args1 => matchMmSigTar(tar,first sig) + args1 = nil => matchMmSigTar(tar,first sig) a:= rest sig arg:= nil for i in 1.. while args1 and args2 and a until not b repeat @@ -943,12 +943,12 @@ matchMmSig(mm,tar,args1,args2) == $Coerce => x2=x or canCoerceFrom(x1,x) x1 is ['Variable,:.] and x = $Symbol $RTC:= [rtc,:$RTC] - null args1 and null a and b and matchMmSigTar(tar,first sig) + args1 = nil and a = nil and b and matchMmSigTar(tar,first sig) matchMmSigTar(t1,t2) == -- t1 is a target type specified by :: or by a declared variable -- t2 is the target of a modemap signature - null t1 or + t1 = nil or isEqualOrSubDomain(t2,t1) => true if t2 is ['Union,a,b] then if a is '"failed" then return matchMmSigTar(t1, b) @@ -984,7 +984,7 @@ filterModemapsFromPackages(mms, names, op) == for mm in mms repeat isFreeFunctionFromMm(mm) => bad := [mm,:bad] type := getDomainFromMm mm - null type => bad := [mm,:bad] + type = nil => bad := [mm,:bad] if cons? type then type := first type getConstructorKindFromDB type is "category" => bad := [mm,:bad] name := object2String type @@ -1150,13 +1150,13 @@ evalMm(op,tar,sig,mmC) == mS:= append!(m,mS) "or"/[not isValidType(arg) for arg in sig] => nil [dc,t,:args]:= sig - $Coerce or null tar or tar=t => + $Coerce or tar = nil or tar=t => mS:= append!(findFunctionInDomain(op,dc,t,args,args,nil,'T),mS) mS evalMmFreeFunction(op,tar,sig,mmC) == [dc,t,:args]:= sig - $Coerce or null tar or tar=t => + $Coerce or tar = nil or tar=t => nilArgs := nil for a in args repeat nilArgs := [nil,:nilArgs] [[[["__FreeFunction__",:dc],t,:args], [t, :args], nilArgs]] @@ -1226,7 +1226,7 @@ evalMmCond0(op,sig,st) == fixUpTypeArgs SL == for (p := [v, :t2]) in SL repeat t1 := LASSOC(v, $Subst) - null t1 => p.rest := replaceSharpCalls t2 + t1 = nil => p.rest := replaceSharpCalls t2 p.rest := coerceTypeArgs(t1, t2, SL) SL @@ -1277,7 +1277,7 @@ makeConstrArg(arg1, arg2, t1, t2, cs) == t1 = t2 => arg2 obj1 := objNewWrap(arg1, t1) obj2 := coerceInt(obj1, t2) - null obj2 => throwKeyedMsgCannotCoerceWithValue(wrap arg1,t1,t2) + obj2 = nil => throwKeyedMsgCannotCoerceWithValue(wrap arg1,t1,t2) objValUnwrap obj2 evalMmDom(st) == @@ -1286,7 +1286,7 @@ evalMmDom(st) == for mmC in st until SL is 'failed repeat mmC is ['isDomain,v,d] => string? d => SL:= 'failed - p := objectAssoc(v,SL) and not (d=rest p) => SL:= 'failed + (p := objectAssoc(v,SL)) and d ~= rest p => SL:= 'failed d1:= subCopy(d,SL) cons?(d1) and symbolMember?(v,d1) => SL:= 'failed SL:= augmentSub(v,d1,SL) @@ -1297,9 +1297,9 @@ evalMmDom(st) == orderMmCatStack st == -- tries to reorder stack so that free pattern variables appear -- as parameters first - null(st) or null rest(st) => st + st = nil or rest(st) = nil => st vars := DELETE_-DUPLICATES [second(s) for s in st | isPatternVar(second(s))] - null vars => st + vars = nil => st havevars := nil haventvars := nil for s in st repeat @@ -1310,14 +1310,14 @@ orderMmCatStack st == mem := true havevars := [s,:havevars] if not mem then haventvars := [s,:haventvars] - null havevars => st + havevars = nil => st st := reverse! append!(haventvars,havevars) SORT(st, function mmCatComp) mmCatComp(c1, c2) == b1 := objectAssoc(second c1, $Subst) b2 := objectAssoc(second c2, $Subst) - b1 and null(b2) => true + b1 and b2 = nil => true false evalMmCat(op,sig,stack,SL) == @@ -1359,7 +1359,7 @@ evalMmCat1(mmC is ['ofCategory,d,c],op, SL) == -- modemap used. RSS 12-22-85 -- If c is not Set, Ring or Field then the more general mechanism dom := defaultTypeForCategory(c, SL) - null dom => + dom = nil => op isnt 'coerce => 'failed -- evalMmCatLastChance(d,c,SL) null (p := objectAssoc(d,$Subst)) => dom => @@ -1642,7 +1642,7 @@ unifyStruct(s1,s2,SL) == isPatternVar s1 => unifyStructVar(s1,s2,SL) isPatternVar s2 => unifyStructVar(s2,s1,SL) s1 isnt [.,:.] or s2 isnt [.,:.] => 'failed - until null s1 or null s2 or SL is 'failed repeat + until s1 = nil or s2 = nil or SL is 'failed repeat SL:= unifyStruct(first s1,first s2,SL) s1:= rest s1 s2:= rest s2 |