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|
-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2008, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical Algorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import c_-util
import pathname
import modemap
import define
import iterator
namespace BOOT
++ A list of routines for diagnostic reports. These functions, in an
++ abstract sense, have type: forall T: Type . String -> T, so they
++ can be used in T-returning functions, for any T.
$coreDiagnosticFunctions ==
'(error userError systemError)
++ list of functions to compile
$compileOnlyCertainItems := []
compTopLevel: (%Form,%Mode,%Env) -> %Maybe %Triple
compTopLevel(x,m,e) ==
--+ signals that target is derived from lhs-- see NRTmakeSlot1Info
$NRTderivedTargetIfTrue: local := false
$killOptimizeIfTrue: local:= false
$forceAdd: local:= false
$compTimeSum: local := 0
$resolveTimeSum: local := 0
$packagesUsed: local := []
x is ["DEF",:.] or x is ["where",["DEF",:.],:.] =>
([val,mode,.]:= compOrCroak(x,m,e); [val,mode,e])
--keep old environment after top level function defs
compOrCroak(x,m,e)
compUniquely: (%Form,%Mode,%Env) -> %Maybe %Triple
compUniquely(x,m,e) ==
$compUniquelyIfTrue: local:= true
CATCH("compUniquely",comp(x,m,e))
compOrCroak: (%Form,%Mode,%Env) -> %Maybe %Triple
compOrCroak(x,m,e) == compOrCroak1(x,m,e,'comp)
compOrCroak1: (%Form,%Mode,%Env,%Thing) -> %Maybe %Triple
compOrCroak1(x,m,e,compFn) ==
fn(x,m,e,nil,nil,compFn) where
fn(x,m,e,$compStack,$compErrorMessageStack,compFn) ==
T:= CATCH("compOrCroak",FUNCALL(compFn,x,m,e)) => T
--stackAndThrow here and moan in UT LISP K does the appropriate THROW
$compStack:= [[x,m,e,$exitModeStack],:$compStack]
$s:=
compactify $compStack where
compactify al ==
null al => nil
LASSOC(first first al,rest al) => compactify rest al
[first al,:compactify rest al]
$level:= #$s
errorMessage:=
if $compErrorMessageStack
then first $compErrorMessageStack
else "unspecified error"
$scanIfTrue =>
stackSemanticError(errorMessage,mkErrorExpr $level)
["failedCompilation",m,e]
displaySemanticErrors()
SAY("****** comp fails at level ",$level," with expression: ******")
displayComp $level
userError errorMessage
tc() ==
comp($x,$m,$f)
comp: (%Form,%Mode,%Env) -> %Maybe %Triple
comp(x,m,e) ==
T:= compNoStacking(x,m,e) => ($compStack:= nil; T)
$compStack:= [[x,m,e,$exitModeStack],:$compStack]
nil
compNoStacking: (%Form,%Mode,%Env) -> %Maybe %Triple
compNoStacking(x,m,e) ==
T:= comp2(x,m,e) =>
$useRepresentationHack and m=$EmptyMode and T.mode=$Representation =>
[T.expr,"$",T.env]
T
--$Representation is bound in compDefineFunctor, set by doIt
--this hack says that when something is undeclared, $ is
--preferred to the underlying representation -- RDJ 9/12/83
--Now that `per' and `rep' are built in, we do the above
--hack only when `Rep' is defined the old way. -- gdr 2008/01/26
compNoStacking1(x,m,e,$compStack)
compNoStacking1: (%Form,%Mode,%Env,%List) -> %Maybe %Triple
compNoStacking1(x,m,e,$compStack) ==
u:= get(RepIfRepHack m,"value",e) =>
(T:= comp2(x,u.expr,e) => [T.expr,m,T.env]; nil)
nil
comp2: (%Form,%Mode,%Env) -> %Maybe %Triple
comp2(x,m,e) ==
[y,m',e]:= comp3(x,m,e) or return nil
if $LISPLIB and isDomainForm(x,e) then
if isFunctor x then
$packagesUsed:= insert([opOf x],$packagesUsed)
--if null atom y and isDomainForm(y,e) then e := addDomain(x,e)
--line commented out to prevent adding derived domain forms
m^=m' and ($bootStrapMode or isDomainForm(m',e))=>[y,m',addDomain(m',e)]
--isDomainForm test needed to prevent error while compiling Ring
--$bootStrapMode-test necessary for compiling Ring in $bootStrapMode
[y,m',e]
comp3: (%Form,%Mode,%Env) -> %Maybe %Triple
comp3(x,m,$e) ==
--returns a Triple or %else nil to signalcan't do'
$e:= addDomain(m,$e)
e:= $e --for debugging purposes
m is ["Mapping",:.] => compWithMappingMode(x,m,e)
m is ["QUOTE",a] => (x=a => [x,m,$e]; nil)
STRINGP m => (atom x => (m=x or m=STRINGIMAGE x => [m,m,e]; nil); nil)
-- In quasiquote mode, x should match exactly
(y := isQuasiquote m) =>
y = x => [["QUOTE",x], m, $e]
nil
^x or atom x => compAtom(x,m,e)
op:= first x
getmode(op,e) is ["Mapping",:ml] and (u:= applyMapping(x,m,e,ml)) => u
op is ["KAPPA",sig,varlist,body] => compApply(sig,varlist,body,rest x,m,e)
op=":" => compColon(x,m,e)
op="::" => compCoerce(x,m,e)
not ($insideCompTypeOf=true) and stringPrefix?('"TypeOf",PNAME op) =>
compTypeOf(x,m,e)
t:= compExpression(x,m,e)
t is [x',m',e'] and not member(m',getDomainsInScope e') =>
[x',m',addDomain(m',e')]
t
compTypeOf: (%Form,%Mode,%Env) -> %Maybe %Triple
compTypeOf(x:=[op,:argl],m,e) ==
$insideCompTypeOf: local := true
newModemap:= EQSUBSTLIST(argl,$FormalMapVariableList,get(op,'modemap,e))
e:= put(op,'modemap,newModemap,e)
comp3(x,m,e)
hasFormalMapVariable(x, vl) ==
$formalMapVariables: local := vl
null vl => false
ScanOrPairVec(function hasone?,x) where
hasone? x == MEMQ(x,$formalMapVariables)
compWithMappingMode: (%Form,%Mode,%List) -> %List
compWithMappingMode(x,m is ["Mapping",m',:sl],oldE) ==
$killOptimizeIfTrue: local:= true
e:= oldE
isFunctor x =>
if get(x,"modemap",$CategoryFrame) is [[[.,target,:argModeList],.],:.] and
(and/[extendsCategoryForm("$",s,mode) for mode in argModeList for s in sl]
) and extendsCategoryForm("$",target,m') then return [x,m,e]
if STRINGP x then x:= INTERN x
for m in sl for v in (vl:= take(#sl,$FormalMapVariableList)) repeat
[.,.,e]:= compMakeDeclaration([":",v,m],$EmptyMode,e)
not null vl and not hasFormalMapVariable(x, vl) => return
[u,.,.] := comp([x,:vl],m',e) or return nil
extractCodeAndConstructTriple(u, m, oldE)
null vl and (t := comp([x], m', e)) => return
[u,.,.] := t
extractCodeAndConstructTriple(u, m, oldE)
[u,.,.]:= comp(x,m',e) or return nil
uu:=optimizeFunctionDef [nil,['LAMBDA,vl,u]]
-- At this point, we have a function that we would like to pass.
-- Unfortunately, it makes various free variable references outside
-- itself. So we build a mini-vector that contains them all, and
-- pass this as the environment to our inner function.
$FUNNAME :local := nil
$FUNNAME__TAIL :local := [nil]
expandedFunction:=COMP_-TRAN CADR uu
frees:=FreeList(expandedFunction,vl,nil,e)
where FreeList(u,bound,free,e) ==
atom u =>
not IDENTP u => free
MEMQ(u,bound) => free
v:=ASSQ(u,free) =>
RPLACD(v,1+CDR v)
free
null getmode(u,e) => free
[[u,:1],:free]
op:=CAR u
MEMQ(op, '(QUOTE GO function)) => free
EQ(op,'LAMBDA) =>
bound:=UNIONQ(bound,CADR u)
for v in CDDR u repeat
free:=FreeList(v,bound,free,e)
free
EQ(op,'PROG) =>
bound:=UNIONQ(bound,CADR u)
for v in CDDR u | NOT ATOM v repeat
free:=FreeList(v,bound,free,e)
free
EQ(op,'SEQ) =>
for v in CDR u | NOT ATOM v repeat
free:=FreeList(v,bound,free,e)
free
EQ(op,'COND) =>
for v in CDR u repeat
for vv in v repeat
free:=FreeList(vv,bound,free,e)
free
if ATOM op then u:=CDR u --Atomic functions aren't descended
for v in u repeat
free:=FreeList(v,bound,free,e)
free
expandedFunction :=
--One free can go by itself, more than one needs a vector
--An A-list name . number of times used
#frees = 0 => ['LAMBDA,[:vl,"$$"], :CDDR expandedFunction]
#frees = 1 =>
vec:=first first frees
['LAMBDA,[:vl,vec], :CDDR expandedFunction]
scode:=nil
vec:=nil
slist:=nil
locals:=nil
i:=-1
for v in frees repeat
i:=i+1
vec:=[first v,:vec]
rest v = 1 =>
--Only used once
slist:=[[first v,"getShellEntry","$$",i],:slist]
scode:=[['SETQ,first v,["getShellEntry","$$",i]],:scode]
locals:=[first v,:locals]
body:=
slist => SUBLISNQ(slist,CDDR expandedFunction)
CDDR expandedFunction
if locals then
if body is [['DECLARE,:.],:.] then
body:=[CAR body,['PROG,locals,:scode,['RETURN,['PROGN,:CDR body]]]]
else body:=[['PROG,locals,:scode,['RETURN,['PROGN,:body]]]]
vec:=['VECTOR,:NREVERSE vec]
['LAMBDA,[:vl,"$$"],:body]
fname:=['CLOSEDFN,expandedFunction]
--Like QUOTE, but gets compiled
uu:=
frees => ['CONS,fname,vec]
['LIST,fname]
[uu,m,oldE]
extractCodeAndConstructTriple(u, m, oldE) ==
u is ["call",fn,:.] =>
if fn is ["applyFun",a] then fn := a
[fn,m,oldE]
[op,:.,env] := u
[["CONS",["function",op],env],m,oldE]
compExpression: (%Form,%Mode,%Env) -> %Maybe %Triple
compExpression(x,m,e) ==
$insideExpressionIfTrue: local:= true
atom first x and (fn:= GETL(first x,"SPECIAL")) =>
FUNCALL(fn,x,m,e)
compForm(x,m,e)
compAtom: (%Form,%Mode,%Env) -> %Maybe %Triple
compAtom(x,m,e) ==
T:= compAtomWithModemap(x,m,e,get(x,"modemap",e)) => T
x="nil" =>
T:=
modeIsAggregateOf('List,m,e) is [.,R]=> compList(x,['List,R],e)
modeIsAggregateOf('Vector,m,e) is [.,R]=> compVector(x,['Vector,R],e)
T => convert(T,m)
t:=
isSymbol x =>
compSymbol(x,m,e) or return nil
m = $OutputForm and primitiveType x => [x,m,e]
STRINGP x => [x,x,e]
[x,primitiveType x or return nil,e]
convert(t,m)
primitiveType: %Thing -> %Mode
primitiveType x ==
x is nil => $EmptyMode
STRINGP x => $String
INTEGERP x =>
x=0 => $NonNegativeInteger
x>0 => $PositiveInteger
true => $NegativeInteger
FLOATP x => $DoubleFloat
nil
compSymbol: (%Form,%Mode,%Env) -> %Maybe %Triple
compSymbol(s,m,e) ==
s="$NoValue" => ["$NoValue",$NoValueMode,e]
isFluid s => [s,getmode(s,e) or return nil,e]
s="true" => ['(QUOTE T),$Boolean,e]
s="false" => [false,$Boolean,e]
s=m or isLiteral(s,e) => [["QUOTE",s],s,e]
v := get(s,"value",e) =>
--+
MEMQ(s,$functorLocalParameters) =>
NRTgetLocalIndex s
[s,v.mode,e] --s will be replaced by an ELT form in beforeCompile
[s,v.mode,e] --s has been SETQd
m':= getmode(s,e) =>
if not member(s,$formalArgList) and not MEMQ(s,$FormalMapVariableList) and
not isFunction(s,e) and null ($compForModeIfTrue=true) then errorRef s
[s,m',e] --s is a declared argument
MEMQ(s,$FormalMapVariableList) =>
stackMessage('"no mode found for %1b",[s])
m = $OutputForm or m = $Symbol => [['QUOTE,s],m,e]
not isFunction(s,e) => errorRef s
++ Return true if `m' is the most recent unique type case assumption
++ on `x' that predates its declaration in environment `e'.
hasUniqueCaseView: (%Form,%Mode,%Env) -> %Boolean
hasUniqueCaseView(x,m,e) ==
props := getProplist(x,e)
for [p,:v] in props repeat
p = "condition" and v is [["case",.,t],:.] => return modeEqual(t,m)
p = "value" => return false
convertOrCroak: (%Maybe %Triple,%Mode) -> %Maybe %Triple
convertOrCroak(T,m) ==
u:= convert(T,m) => u
userError ["CANNOT CONVERT: ",T.expr,"%l"," OF MODE: ",T.mode,"%l",
" TO MODE: ",m,"%l"]
convert: (%Maybe %Triple,%Mode) -> %Maybe %Triple
convert(T,m) ==
coerce(T,resolve(T.mode,m) or return nil)
mkUnion(a,b) ==
b="$" and $Rep is ["Union",:l] => b
a is ["Union",:l] =>
b is ["Union",:l'] => ["Union",:union(l,l')]
["Union",:union([b],l)]
b is ["Union",:l] => ["Union",:union([a],l)]
["Union",a,b]
maxSuperType(m,e) ==
typ:= get(m,"SuperDomain",e) => maxSuperType(typ,e)
m
hasType(x,e) ==
fn get(x,"condition",e) where
fn x ==
null x => nil
x is [["case",.,y],:.] => y
fn rest x
--% General Forms
compForm: (%Form,%Mode,%Env) -> %Maybe %Triple
compForm1: (%Form,%Mode,%Env) -> %Maybe %Triple
compForm2: (%Form,%Mode,%Env,%List) -> %Maybe %Triple
compForm3: (%Form,%Mode,%Env,%List) -> %Maybe %Triple
compArgumentsAndTryAgain: (%Form,%Mode,%Env) -> %Maybe %Triple
compExpressionList: (%List,%Mode,%Env) -> %Maybe %Triple
compForm(form,m,e) ==
T:=
compForm1(form,m,e) or compArgumentsAndTryAgain(form,m,e) or return
stackMessageIfNone ["cannot compile","%b",form,"%d"]
T
compArgumentsAndTryAgain(form is [.,:argl],m,e) ==
-- used in case: f(g(x)) where f is in domain introduced by
-- comping g, e.g. for (ELT (ELT x a) b), environment can have no
-- modemap with selector b
form is ["elt",a,.] =>
([.,.,e]:= comp(a,$EmptyMode,e) or return nil; compForm1(form,m,e))
u:= for x in argl repeat [.,.,e]:= comp(x,$EmptyMode,e) or return "failed"
u="failed" => nil
compForm1(form,m,e)
outputComp(x,e) ==
u:=comp(['_:_:,x,$OutputForm],$OutputForm,e) => u
x is ['construct,:argl] =>
[['LIST,:[([.,.,e]:=outputComp(x,e)).expr for x in argl]],$OutputForm,e]
(v:= get(x,"value",e)) and (v.mode is ['Union,:l]) =>
[['coerceUn2E,x,v.mode],$OutputForm,e]
[x,$OutputForm,e]
compForm1(form is [op,:argl],m,e) ==
$NumberOfArgsIfInteger: local:= #argl --see compElt
op in $coreDiagnosticFunctions =>
[[op,:[([.,.,e]:=outputComp(x,e)).expr
for x in argl]],m,e]
op is ["elt",domain,op'] =>
domain="Lisp" =>
--op'='QUOTE and null rest argl => [first argl,m,e]
[[op',:[([.,.,e]:= compOrCroak(x,$EmptyMode,e)).expr for x in argl]],m,e]
domain=$Expression and op'="construct" => compExpressionList(argl,m,e)
(op'="COLLECT") and coerceable(domain,m,e) =>
(T:= comp([op',:argl],domain,e) or return nil; coerce(T,m))
-- Next clause added JHD 8/Feb/94: the clause after doesn't work
-- since addDomain refuses to add modemaps from Mapping
(domain is ['Mapping,:.]) and
(ans := compForm2([op',:argl],m,e:= augModemapsFromDomain1(domain,domain,e),
[x for x in getFormModemaps([op',:argl],e) | x is [[ =domain,:.],:.]])) => ans
ans := compForm2([op',:argl],m,e:= addDomain(domain,e),
[x for x in getFormModemaps([op',:argl],e) | x is [[ =domain,:.],:.]]) => ans
(op'="construct") and coerceable(domain,m,e) =>
(T:= comp([op',:argl],domain,e) or return nil; coerce(T,m))
nil
e:= addDomain(m,e) --???unneccessary because of comp2's call???
(mmList:= getFormModemaps(form,e)) and (T:= compForm2(form,m,e,mmList)) => T
compToApply(op,argl,m,e)
compExpressionList(argl,m,e) ==
Tl:= [[.,.,e]:= comp(x,$Expression,e) or return "failed" for x in argl]
Tl="failed" => nil
convert([["LIST",:[y.expr for y in Tl]],$Expression,e],m)
compForm2(form is [op,:argl],m,e,modemapList) ==
sargl:= TAKE(# argl, $TriangleVariableList)
aList:= [[sa,:a] for a in argl for sa in sargl]
modemapList:= SUBLIS(aList,modemapList)
deleteList:=[]
newList := []
-- now delete any modemaps that are subsumed by something else, provided the conditions
-- are right (i.e. subsumer true whenever subsumee true)
for u in modemapList repeat
if u is [[dc,:.],[cond,["Subsumed",.,nsig]]] and
(v:=assoc([dc,:nsig],modemapList)) and v is [.,[ncond,:.]] then
deleteList:=[u,:deleteList]
if not PredImplies(ncond,cond) then
newList := [[CAR u,[cond,['ELT,dc,nil]]],:newList]
if deleteList then modemapList:=[u for u in modemapList | not MEMQ(u,deleteList)]
-- We can use MEMQ since deleteList was built out of members of modemapList
-- its important that subsumed ops (newList) be considered last
if newList then modemapList := append(modemapList,newList)
-- The calling convention vector is used to determine when it is
-- appropriate to infer type by compiling the argument vs. just
-- looking up the parameter type for flag arguments.
cc := checkCallingConvention([sig for [[.,:sig],:.] in modemapList], #argl)
Tl:=
[[.,.,e]:= T for x in argl for i in 0..
while (T := inferMode(x,cc.i > 0,e))] where
inferMode(x,flag,e) ==
flag => [x,quasiquote x,e]
isSimple x and compUniquely(x,$EmptyMode,e)
or/[x for x in Tl] =>
partialModeList:= [(x => x.mode; nil) for x in Tl]
compFormPartiallyBottomUp(form,m,e,modemapList,partialModeList) or
compForm3(form,m,e,modemapList)
compForm3(form,m,e,modemapList)
compFormPartiallyBottomUp(form,m,e,modemapList,partialModeList) ==
mmList:= [mm for mm in modemapList | compFormMatch(mm,partialModeList)] =>
compForm3(form,m,e,mmList)
compFormMatch(mm,partialModeList) ==
mm is [[.,.,:argModeList],:.] and match(argModeList,partialModeList) where
match(a,b) ==
null b => true
null first b => match(rest a,rest b)
first a=first b and match(rest a,rest b)
compForm3(form is [op,:argl],m,e,modemapList) ==
T:=
or/
[compFormWithModemap(form,m,e,first (mml:= ml))
for ml in tails modemapList]
$compUniquelyIfTrue =>
or/[compFormWithModemap(form,m,e,mm) for mm in rest mml] =>
THROW("compUniquely",nil)
T
T
getFormModemaps: (%Form,%Env) -> %List
getFormModemaps(form is [op,:argl],e) ==
op is ["elt",domain,op1] =>
[x for x in getFormModemaps([op1,:argl],e) | x is [[ =domain,:.],:.]]
null atom op => nil
modemapList:= get(op,"modemap",e)
if $insideCategoryPackageIfTrue then
modemapList := [x for x in modemapList | x is [[dom,:.],:.] and dom ^= '$]
if op="elt"
then modemapList:= eltModemapFilter(LAST argl,modemapList,e) or return nil
else
if op="setelt" then modemapList:=
seteltModemapFilter(CADR argl,modemapList,e) or return nil
nargs:= #argl
finalModemapList:= [mm for (mm:= [[.,.,:sig],:.]) in modemapList | #sig=nargs]
modemapList and null finalModemapList =>
stackMessage('"no modemap for %1b with %2 arguments", [op,nargs])
finalModemapList
++ We are either compiling a function call, or trying to determine
++ whether we know something about a function being defined with
++ parameters are not declared in the definition. `sigs' is the list of
++ candidate signatures for `nargs' arguments or parameters. We need
++ to detemine whether any of the arguments are flags. If any
++ operation takes a flag argument, then all other overloads must have
++ the same arity and must take flag argument in the same position.
++ Returns a vector of length `nargs' with positive entries indicating
++ flag arguments, and negative entries for normal argument passing.
checkCallingConvention: (%List,%Short) -> %SimpleArray %Short
checkCallingConvention(sigs,nargs) ==
v := makeFilledSimpleArray("%Short",nargs,0)
for sig in sigs repeat
for t in rest sig
for i in 0.. repeat
isQuasiquote t =>
v.i < 0 => userError '"flag argument restriction violation"
v.i := v.i + 1
v.i > 0 => userError '"flag argument restriction violation"
v.i := v.i - 1
v
getConstructorFormOfMode(m,e) ==
isConstructorForm m => m
m := RepIfRepHack m
atom m and get(m,"value",e) is [v,:.] =>
isConstructorForm v => v
getConstructorMode(x,e) ==
atom x => (u:= getmode(x,e) or return nil; getConstructorFormOfMode(u,e))
x is ["elt",y,a] =>
u:= getConstructorMode(y,e)
u is ["Vector",R] or u is ["List",R] =>
isConstructorForm R => R
u is ["Record",:l] =>
(or/[p is [., =a,R] for p in l]) and isConstructorForm R => R
isConstructorForm u == u is [name,:.] and member(name,'(Record Vector List))
eltModemapFilter(name,mmList,e) ==
isConstantId(name,e) =>
l:= [mm for mm in mmList | mm is [[.,.,.,sel,:.],:.] and sel=name] => l
--there are elts with extra parameters
stackMessage('"selector variable: %1b is undeclared and unbound",[name])
nil
mmList
seteltModemapFilter(name,mmList,e) ==
isConstantId(name,e) =>
l:= [mm for (mm:= [[.,.,.,sel,:.],:.]) in mmList | sel=name] => l
--there are setelts with extra parameters
stackMessage('"selector variable: %1b is undeclared and unbound",[name])
nil
mmList
substituteIntoFunctorModemap(argl,modemap is [[dc,:sig],:.],e) ==
#dc^=#sig =>
keyedSystemError("S2GE0016",['"substituteIntoFunctorModemap",
'"Incompatible maps"])
#argl=#rest sig =>
--here, we actually have a functor form
sig:= EQSUBSTLIST(argl,rest dc,sig)
--make new modemap, subst. actual for formal parametersinto modemap
Tl:= [[.,.,e]:= compOrCroak(a,m,e) for a in argl for m in rest sig]
substitutionList:= [[x,:T.expr] for x in rest dc for T in Tl]
[SUBLIS(substitutionList,modemap),e]
nil
--% SPECIAL EVALUATION FUNCTIONS
compConstructorCategory(x,m,e) == [x,resolve($Category,m),e]
compString: (%Form,%Mode,%Env) -> %Maybe %Triple
compString(x,m,e) == [x,resolve($StringCategory,m),e]
--% SUBSET CATEGORY
compSubsetCategory: (%Form,%Mode,%Env) -> %Maybe %Triple
compSubsetCategory(["SubsetCategory",cat,R],m,e) ==
--1. put "Subsets" property on R to allow directly coercion to subset;
-- allow automatic coercion from subset to R but not vice versa
e:= put(R,"Subsets",[[$lhsOfColon,"isFalse"]],e)
--2. give the subset domain modemaps of cat plus 3 new functions
comp(["Join",cat,C'],m,e) where
C'() ==
substitute($lhsOfColon,"$",C'') where
C''() ==
["CATEGORY","domain",["SIGNATURE","coerce",[R,"$"]],["SIGNATURE",
"lift",[R,"$"]],["SIGNATURE","reduce",["$",R]]]
--% CONS
compCons: (%Form,%Mode,%Env) -> %Maybe %Triple
compCons1: (%Form,%Mode,%Env) -> %Maybe %Triple
compCons(form,m,e) == compCons1(form,m,e) or compForm(form,m,e)
compCons1(["CONS",x,y],m,e) ==
[x,mx,e]:= comp(x,$EmptyMode,e) or return nil
null y => convert([["LIST",x],["List",mx],e],m)
yt:= [y,my,e]:= comp(y,$EmptyMode,e) or return nil
T:=
my is ["List",m',:.] =>
mr:= ["List",resolve(m',mx) or return nil]
yt':= convert(yt,mr) or return nil
[x,.,e]:= convert([x,mx,yt'.env],CADR mr) or return nil
yt'.expr is ["LIST",:.] => [["LIST",x,:rest yt'.expr],mr,e]
[["CONS",x,yt'.expr],mr,e]
[["CONS",x,y],["Pair",mx,my],e]
convert(T,m)
--% SETQ
compSetq: (%List,%Thing,%List) -> %List
compSetq1: (%List,%Thing,%List) -> %List
compSetq(["LET",form,val],m,E) == compSetq1(form,val,m,E)
compSetq1(form,val,m,E) ==
IDENTP form => setqSingle(form,val,m,E)
form is [":",x,y] =>
[.,.,E']:= compMakeDeclaration(form,$EmptyMode,E)
compSetq(["LET",x,val],m,E')
form is [op,:l] =>
op="CONS" => setqMultiple(uncons form,val,m,E)
op="Tuple" => setqMultiple(l,val,m,E)
setqSetelt(form,val,m,E)
compMakeDeclaration: (%Form,%Mode,%Env) -> %Maybe %Triple
compMakeDeclaration(x,m,e) ==
$insideExpressionIfTrue: local
compColon(x,m,e)
setqSetelt([v,:s],val,m,E) ==
comp(["setelt",v,:s,val],m,E)
setqSingle(id,val,m,E) ==
$insideSetqSingleIfTrue: local:= true
--used for comping domain forms within functions
currentProplist:= getProplist(id,E)
m'':=
get(id,'mode,E) or getmode(id,E) or
(if m=$NoValueMode then $EmptyMode else m)
-- m'':= LASSOC("mode",currentProplist) or $EmptyMode
--for above line to work, line 3 of compNoStackingis required
T:=
eval or return nil where
eval() ==
T:= comp(val,m'',E) => T
not get(id,"mode",E) and m'' ^= (maxm'':=maxSuperType(m'',E)) and
(T:=comp(val,maxm'',E)) => T
(T:= comp(val,$EmptyMode,E)) and getmode(T.mode,E) =>
assignError(val,T.mode,id,m'')
T':= [x,m',e']:= convert(T,m) or return nil
if $profileCompiler = true then
null IDENTP id => nil
key :=
MEMQ(id,rest $form) => 'arguments
'locals
profileRecord(key,id,T.mode)
newProplist:= consProplistOf(id,currentProplist,"value",removeEnv [val,:rest T])
e':= (PAIRP id => e'; addBinding(id,newProplist,e'))
if isDomainForm(val,e') then
if isDomainInScope(id,e') then
stackWarning("domain valued variable %1b has been reassigned within its scope",[id])
e':= augModemapsFromDomain1(id,val,e')
--all we do now is to allocate a slot number for lhs
--e.g. the LET form below will be changed by putInLocalDomainReferences
--+
if (k:=NRTassocIndex(id))
then form:=['SETELT,"$",k,x]
else form:=
$QuickLet => ["LET",id,x]
["LET",id,x,
(isDomainForm(x,e') => ['ELT,id,0];CAR outputComp(id,e'))]
[form,m',e']
assignError(val,m',form,m) ==
val =>
stackMessage('"CANNOT ASSIGN: %1b OF MODE: %2pb TO: %3b OF MODE: %4bp",
[val,m',form,m])
stackMessage('"CANNOT ASSIGN: %1b TO: %2b OF MODE: %3pb",[val,form,m])
setqMultiple(nameList,val,m,e) ==
val is ["CONS",:.] and m=$NoValueMode =>
setqMultipleExplicit(nameList,uncons val,m,e)
val is ["Tuple",:l] and m=$NoValueMode => setqMultipleExplicit(nameList,l,m,e)
1 --create a gensym, %add to local environment, compile and assign rhs
g:= genVariable()
e:= addBinding(g,nil,e)
T:= [.,m1,.]:= compSetq1(g,val,$EmptyMode,e) or return nil
e:= put(g,"mode",m1,e)
[x,m',e]:= convert(T,m) or return nil
1.1 --exit if result is a list
m1 is ["List",D] =>
for y in nameList repeat e:= put(y,"value",[genSomeVariable(),D,$noEnv],e)
convert([["PROGN",x,["LET",nameList,g],g],m',e],m)
2 --verify that the #nameList = number of parts of right-hand-side
selectorModePairs:=
--list of modes
decompose(m1,#nameList,e) or return nil where
decompose(t,length,e) ==
t is ["Record",:l] => [[name,:mode] for [":",name,mode] in l]
comp(t,$EmptyMode,e) is [.,["RecordCategory",:l],.] =>
[[name,:mode] for [":",name,mode] in l]
stackMessage('"no multiple assigns to mode: %1p",[t])
#nameList^=#selectorModePairs =>
stackMessage('"%1b must decompose into %2 components",[val,#nameList])
3 --generate code; return
assignList:=
[([.,.,e]:= compSetq1(x,["elt",g,y],z,e) or return "failed").expr
for x in nameList for [y,:z] in selectorModePairs]
if assignList="failed" then NIL
else [MKPROGN [x,:assignList,g],m',e]
setqMultipleExplicit(nameList,valList,m,e) ==
#nameList^=#valList =>
stackMessage('"Multiple assignment error; # of items in: %1b must = # in: %2",[nameList,valList])
gensymList:= [genVariable() for name in nameList]
assignList:=
--should be fixed to declare genVar when possible
[[.,.,e]:= compSetq1(g,val,$EmptyMode,e) or return "failed"
for g in gensymList for val in valList]
assignList="failed" => nil
reAssignList:=
[[.,.,e]:= compSetq1(name,g,$EmptyMode,e) or return "failed"
for g in gensymList for name in nameList]
reAssignList="failed" => nil
[["PROGN",:[T.expr for T in assignList],:[T.expr for T in reAssignList]],
$NoValueMode, (LAST reAssignList).env]
--% Quasiquotation
++ Compile a quotation `[| form |]'. form is not type-checked, and
++ is returned as is. Note: when get to support splicing, we would
++ need to scan `form' to see whether there is any computation that
++ must be done.
++ ??? Another strategy would be to infer a more accurate domain
++ ??? based on the meta operator, e.g. (DEF ...) would be a
++ DefinitionAst, etc. That however requires that we have a full
++ fledged AST algebra -- which we don't have yet in mainstream.
compileQuasiquote: (%List,%Thing,%List) -> %List
compileQuasiquote(["[||]",:form],m,e) ==
null form => nil
coerce([["QUOTE", :form],$Syntax,e], m)
--% WHERE
compWhere: (%Form,%Mode,%Env) -> %Maybe %Triple
compWhere([.,form,:exprList],m,eInit) ==
$insideExpressionIfTrue: local:= false
$insideWhereIfTrue: local:= true
e:= eInit
u:=
for item in exprList repeat
[.,.,e]:= comp(item,$EmptyMode,e) or return "failed"
u="failed" => return nil
$insideWhereIfTrue:= false
[x,m,eAfter]:= comp(macroExpand(form,eBefore:= e),m,e) or return nil
eFinal:=
del:= deltaContour(eAfter,eBefore) => addContour(del,eInit)
eInit
[x,m,eFinal]
compConstruct: (%Form,%Mode,%Env) -> %Maybe %Triple
compConstruct(form is ["construct",:l],m,e) ==
y:= modeIsAggregateOf("List",m,e) =>
T:= compList(l,["List",CADR y],e) => convert(T,m)
compForm(form,m,e)
y:= modeIsAggregateOf("Vector",m,e) =>
T:= compVector(l,["Vector",CADR y],e) => convert(T,m)
compForm(form,m,e)
T:= compForm(form,m,e) => T
for D in getDomainsInScope e repeat
(y:=modeIsAggregateOf("List",D,e)) and
(T:= compList(l,["List",CADR y],e)) and (T':= convert(T,m)) =>
return T'
(y:=modeIsAggregateOf("Vector",D,e)) and
(T:= compVector(l,["Vector",CADR y],e)) and (T':= convert(T,m)) =>
return T'
compQuote(expr,m,e) == [expr,m,e]
compList: (%Form,%Mode,%Env) -> %Maybe %Triple
compList(l,m is ["List",mUnder],e) ==
null l => [NIL,m,e]
Tl:= [[.,mUnder,e]:= comp(x,mUnder,e) or return "failed" for x in l]
Tl="failed" => nil
T:= [["LIST",:[T.expr for T in Tl]],["List",mUnder],e]
compVector: (%Form,%Mode,%Env) -> %Maybe %Triple
compVector(l,m is ["Vector",mUnder],e) ==
null l => [$EmptyVector,m,e]
Tl:= [[.,mUnder,e]:= comp(x,mUnder,e) or return "failed" for x in l]
Tl="failed" => nil
[["VECTOR",:[T.expr for T in Tl]],m,e]
--% MACROS
compMacro(form,m,e) ==
$macroIfTrue: local:= true
["MDEF",lhs,signature,specialCases,rhs]:= form
prhs :=
rhs is ['CATEGORY,:.] => ['"-- the constructor category"]
rhs is ['Join,:.] => ['"-- the constructor category"]
rhs is ['CAPSULE,:.] => ['"-- the constructor capsule"]
rhs is ['add,:.] => ['"-- the constructor capsule"]
formatUnabbreviated rhs
sayBrightly ['" processing macro definition",'%b,
:formatUnabbreviated lhs,'" ==> ",:prhs,'%d]
m=$EmptyMode or m=$NoValueMode =>
["/throwAway",$NoValueMode,put(first lhs,"macro",macroExpand(rhs,e),e)]
--% SEQ
compSeq: (%Form,%Mode,%Env) -> %Maybe %Triple
compSeq1: (%Form,%List,%Env) -> %Maybe %Triple
compSeqItem: (%Thing,%Thing,%List) -> %List
compSeq(["SEQ",:l],m,e) == compSeq1(l,[m,:$exitModeStack],e)
compSeq1(l,$exitModeStack,e) ==
$insideExpressionIfTrue: local
$finalEnv: local
--used in replaceExitEtc.
c:=
[([.,.,e]:=
--this used to be compOrCroak-- but changed so we can back out
($insideExpressionIfTrue:= NIL; compSeqItem(x,$NoValueMode,e) or return
"failed")).expr for x in l]
if c="failed" then return nil
catchTag:= MKQ GENSYM()
form:= ["SEQ",:replaceExitEtc(c,catchTag,"TAGGEDexit",$exitModeStack.(0))]
[["CATCH",catchTag,form],$exitModeStack.(0),$finalEnv]
compSeqItem(x,m,e) == comp(macroExpand(x,e),m,e)
replaceExitEtc(x,tag,opFlag,opMode) ==
(fn(x,tag,opFlag,opMode); x) where
fn(x,tag,opFlag,opMode) ==
atom x => nil
x is ["QUOTE",:.] => nil
x is [ =opFlag,n,t] =>
rplac(CAADDR x,replaceExitEtc(CAADDR x,tag,opFlag,opMode))
n=0 =>
$finalEnv:=
--bound in compSeq1 and compDefineCapsuleFunction
$finalEnv => intersectionEnvironment($finalEnv,t.env)
t.env
rplac(first x,"THROW")
rplac(CADR x,tag)
rplac(CADDR x,(convertOrCroak(t,opMode)).expr)
true => rplac(CADR x,CADR x-1)
x is [key,n,t] and MEMQ(key,'(TAGGEDreturn TAGGEDexit)) =>
rplac(first t,replaceExitEtc(first t,tag,opFlag,opMode))
replaceExitEtc(first x,tag,opFlag,opMode)
replaceExitEtc(rest x,tag,opFlag,opMode)
--% SUCHTHAT
compSuchthat: (%Form,%Mode,%Env) -> %Maybe %Triple
compSuchthat([.,x,p],m,e) ==
[x',m',e]:= comp(x,m,e) or return nil
[p',.,e]:= comp(p,$Boolean,e) or return nil
e:= put(x',"condition",p',e)
[x',m',e]
--% exit
compExit: (%Form,%Mode,%Env) -> %Maybe %Triple
compExit(["exit",level,x],m,e) ==
index:= level-1
$exitModeStack = [] => comp(x,m,e)
m1:= $exitModeStack.index
[x',m',e']:=
u:=
comp(x,m1,e) or return
stackMessageIfNone ["cannot compile exit expression",x,"in mode",m1]
modifyModeStack(m',index)
[["TAGGEDexit",index,u],m,e]
modifyModeStack(m,index) ==
$reportExitModeStack =>
SAY("exitModeStack: ",COPY $exitModeStack," ====> ",
($exitModeStack.index:= resolve(m,$exitModeStack.index); $exitModeStack))
$exitModeStack.index:= resolve(m,$exitModeStack.index)
compLeave: (%Form,%Mode,%Env) -> %Maybe %Triple
compLeave(["leave",level,x],m,e) ==
index:= #$exitModeStack-1-$leaveLevelStack.(level-1)
[x',m',e']:= u:= comp(x,$exitModeStack.index,e) or return nil
modifyModeStack(m',index)
[["TAGGEDexit",index,u],m,e]
--% return
compReturn: (%Form,%Mode,%Env) -> %Maybe %Triple
compReturn(["return",level,x],m,e) ==
null $exitModeStack =>
stackSemanticError(["the return before","%b",x,"%d","is unneccessary"],nil)
nil
level^=1 => userError '"multi-level returns not supported"
index:= MAX(0,#$exitModeStack-1)
if index>=0 then $returnMode:= resolve($exitModeStack.index,$returnMode)
[x',m',e']:= u:= comp(x,$returnMode,e) or return nil
if index>=0 then
$returnMode:= resolve(m',$returnMode)
modifyModeStack(m',index)
[["TAGGEDreturn",0,u],m,e']
--% ELT
compElt: (%Form,%Mode,%Env) -> %Maybe %Triple
compElt(form,m,E) ==
form isnt ["elt",aDomain,anOp] => compForm(form,m,E)
aDomain="Lisp" =>
[anOp',m,E] where anOp'() == (anOp=$Zero => 0; anOp=$One => 1; anOp)
isDomainForm(aDomain,E) =>
E:= addDomain(aDomain,E)
mmList:= getModemapListFromDomain(anOp,0,aDomain,E)
modemap:=
n:=#mmList
1=n => mmList.(0)
0=n =>
return
stackMessage('"Operation %1b missing from domain: %2p",
[anOp,aDomain])
stackWarning('"more than 1 modemap for: %1 with dc = %2p ===> %3",
[anOp,aDomain,mmList])
mmList.(0)
[sig,[pred,val]]:= modemap
#sig^=2 and ^val is ["elt",:.] => nil --what does the second clause do ????
--+
val := genDeltaEntry [opOf anOp,:modemap]
convert([["call",val],first rest sig,E], m) --implies fn calls used to access constants
compForm(form,m,E)
--% HAS
compHas: (%Form,%Mode,%Env) -> %Maybe %Triple
compHas(pred is ["has",a,b],m,$e) ==
--b is (":",:.) => (.,.,E):= comp(b,$EmptyMode,E)
$e:= chaseInferences(pred,$e)
--pred':= ("has",a',b') := formatHas(pred)
predCode:= compHasFormat pred
coerce([predCode,$Boolean,$e],m)
--used in various other places to make the discrimination
compHasFormat (pred is ["has",olda,b]) ==
argl := rest $form
formals := TAKE(#argl,$FormalMapVariableList)
a := SUBLISLIS(argl,formals,olda)
[a,:.] := comp(a,$EmptyMode,$e) or return nil
a := SUBLISLIS(formals,argl,a)
b is ["ATTRIBUTE",c] => ["HasAttribute",a,["QUOTE",c]]
b is ["SIGNATURE",op,sig] =>
["HasSignature",a,
mkList [MKQ op,mkList [mkDomainConstructor type for type in sig]]]
isDomainForm(b,$EmptyEnvironment) => ["EQUAL",a,b]
["HasCategory",a,mkDomainConstructor b]
--% IF
compIf: (%Form,%Mode,%Env) -> %Maybe %Triple
compBoolean: (%Form,%Mode,%Env) -> %List
compFromIf: (%Form,%Mode,%Env) -> %Maybe %Triple
compIf(["IF",a,b,c],m,E) ==
[xa,ma,Ea,Einv]:= compBoolean(a,$Boolean,E) or return nil
[xb,mb,Eb]:= Tb:= compFromIf(b,m,Ea) or return nil
[xc,mc,Ec]:= Tc:= compFromIf(c,resolve(mb,m),Einv) or return nil
xb':= coerce(Tb,mc) or return nil
x:= ["IF",xa,quotify xb'.expr,quotify xc]
(returnEnv:= Env(xb'.env,Ec,xb'.expr,xc,E)) where
Env(bEnv,cEnv,b,c,E) ==
canReturn(b,0,0,true) =>
(canReturn(c,0,0,true) => intersectionEnvironment(bEnv,cEnv); bEnv)
canReturn(c,0,0,true) => cEnv
E
[x,mc,returnEnv]
canReturn(expr,level,exitCount,ValueFlag) == --SPAD: exit and friends
atom expr => ValueFlag and level=exitCount
(op:= first expr)="QUOTE" => ValueFlag and level=exitCount
op="TAGGEDexit" =>
expr is [.,count,data] => canReturn(data.expr,level,count,count=level)
level=exitCount and not ValueFlag => nil
op="SEQ" => or/[canReturn(u,level+1,exitCount,false) for u in rest expr]
op="TAGGEDreturn" => nil
op="CATCH" =>
[.,gs,data]:= expr
(findThrow(gs,data,level,exitCount,ValueFlag) => true) where
findThrow(gs,expr,level,exitCount,ValueFlag) ==
atom expr => nil
expr is ["THROW", =gs,data] => true
--this is pessimistic, but I know of no more accurate idea
expr is ["SEQ",:l] =>
or/[findThrow(gs,u,level+1,exitCount,ValueFlag) for u in l]
or/[findThrow(gs,u,level,exitCount,ValueFlag) for u in rest expr]
canReturn(data,level,exitCount,ValueFlag)
op = "COND" =>
level = exitCount =>
or/[canReturn(last u,level,exitCount,ValueFlag) for u in rest expr]
or/[or/[canReturn(u,level,exitCount,ValueFlag) for u in v]
for v in rest expr]
op="IF" =>
expr is [.,a,b,c]
if not canReturn(a,0,0,true) then
SAY "IF statement can not cause consequents to be executed"
pp expr
canReturn(a,level,exitCount,nil) or canReturn(b,level,exitCount,ValueFlag)
or canReturn(c,level,exitCount,ValueFlag)
--now we have an ordinary form
atom op => and/[canReturn(u,level,exitCount,ValueFlag) for u in expr]
op is ["XLAM",args,bods] =>
and/[canReturn(u,level,exitCount,ValueFlag) for u in expr]
systemErrorHere '"canReturn" --for the time being
compBoolean(p,m,E) ==
[p',m,E]:= comp(p,m,E) or return nil
[p',m,getSuccessEnvironment(p,E),getInverseEnvironment(p,E)]
getSuccessEnvironment(a,e) ==
-- the next four lines try to ensure that explicit special-case tests
-- prevent implicit ones from being generated
a is ["has",x,m] =>
IDENTP x and isDomainForm(m,$EmptyEnvironment) => put(x,"specialCase",m,e)
e
a is ["is",id,m] =>
IDENTP id and isDomainForm(m,$EmptyEnvironment) =>
e:=put(id,"specialCase",m,e)
currentProplist:= getProplist(id,e)
[.,.,e] := T := comp(m,$EmptyMode,e) or return nil -- duplicates compIs
newProplist:= consProplistOf(id,currentProplist,"value",[m,:rest removeEnv T])
addBinding(id,newProplist,e)
e
a is ["case",x,m] and IDENTP x =>
put(x,"condition",[a,:get(x,"condition",e)],e)
e
getInverseEnvironment(a,E) ==
atom a => E
[op,:argl]:= a
-- the next five lines try to ensure that explicit special-case tests
-- prevent implicit ones from being generated
op="has" =>
[x,m]:= argl
IDENTP x and isDomainForm(m,$EmptyEnvironment) => put(x,"specialCase",m,E)
E
a is ["case",x,m] and IDENTP x =>
--the next two lines are necessary to get 3-branched Unions to work
-- old-style unions, that is
(get(x,"condition",E) is [["OR",:oldpred]]) and member(a,oldpred) =>
put(x,"condition",LIST MKPF(delete(a,oldpred),"OR"),E)
getUnionMode(x,E) is ["Union",:l]
l':= delete(m,l)
for u in l' repeat
if u is ['_:,=m,:.] then l':= delete(u,l')
newpred:= MKPF([["case",x,m'] for m' in l'],"OR")
put(x,"condition",[newpred,:get(x,"condition",E)],E)
E
getUnionMode(x,e) ==
m:=
atom x => getmode(x,e)
return nil
isUnionMode(m,e)
isUnionMode(m,e) ==
m is ["Union",:.] => m
(m':= getmode(m,e)) is ["Mapping",["UnionCategory",:.]] => CADR m'
v:= get(RepIfRepHack m,"value",e) =>
(v.expr is ["Union",:.] => v.expr; nil)
nil
compFromIf(a,m,E) ==
a="%noBranch" => ["%noBranch",m,E]
true => comp(a,m,E)
quotify x == x
compImport: (%Form,%Mode,%Env) -> %Maybe %Triple
compImport(["import",:doms],m,e) ==
for dom in doms repeat e:=addDomain(dom,e)
["/throwAway",$NoValueMode,e]
--% Compilation of logical operators that may have a pre-defined
--% meaning, or may need special handling because or short-circuiting
--% etc.
++ compile a logical negation form `(not ...)'.
compileNot: (%Form,%Mode,%Env) -> %Maybe %Triple
compileNot(x,m,e) ==
x isnt ["not", y] => nil
-- If there is a modemap available that can make this work, just use it.
T := compForm(x,m,e) => T
-- Otherwise, we may be in a case where we might want to apply
-- built-in Boolean meaning. Eventually, we should not need to
-- do this special case here.
[xcode, xmode, xtrueEnv, xfalseEnv] := compBoolean(y, $Boolean, e)
or return nil
convert([["NOT", xcode], xmode, xfalseEnv], m)
--% Case
compCase: (%Form,%Mode,%Env) -> %Maybe %Triple
compCase1: (%Form,%Mode,%Env) -> %Maybe %Triple
--Will the jerk who commented out these two functions please NOT do so
--again. These functions ARE needed, and case can NOT be done by
--modemap alone. The reason is that A case B requires to take A
--evaluated, but B unevaluated. Therefore a special function is
--required. You may have thought that you had tested this on "failed"
--etc., but "failed" evaluates to it's own mode. Try it on x case $
--next time.
-- An angry JHD - August 15th., 1984
compCase(["case",x,m'],m,e) ==
e:= addDomain(m',e)
T:= compCase1(x,m',e) => coerce(T,m)
nil
compCase1(x,m,e) ==
[x',m',e']:= comp(x,$EmptyMode,e) or return nil
u:=
[modemap
for (modemap := [map,cexpr]) in getModemapList("case",2,e')
| map is [.,=$Boolean,s,t] and modeEqual(maybeSpliceMode t,m)
and modeEqual(s,m')] or return nil
fn:= (or/[mm for (mm := [.,[cond,selfn]]) in u | cond=true]) or return nil
fn := genDeltaEntry ["case",:fn]
-- user-defined `case' functions really are binary, as opposed to
-- the compiler-synthetized versions for Union instances.
not isUnionMode(m',e') => [["call",fn,x',MKQ m],$Boolean,e']
[["call",fn,x'],$Boolean,e']
++ For `case' operation implemented in library, the second operand
++ (target type) is taken unevaluated. The corresponding parameter
++ type in the modemap was specified as quasiquotation. We
++ want to look at the actual type when comparing with modeEqual.
maybeSpliceMode: %Mode -> %Mode
maybeSpliceMode m ==
(m' := isQuasiquote m) => m'
m
compColon: (%Form,%Mode,%Env) -> %Maybe %Triple
compColon([":",f,t],m,e) ==
$insideExpressionIfTrue=true => compColonInside(f,m,e,t)
--if inside an expression, ":" means to convert to m "on faith"
$lhsOfColon: local:= f
t:=
atom t and (t':= assoc(t,getDomainsInScope e)) => t'
isDomainForm(t,e) and not $insideCategoryIfTrue =>
(if not member(t,getDomainsInScope e) then e:= addDomain(t,e); t)
isDomainForm(t,e) or isCategoryForm(t,e) => t
t is ["Mapping",m',:r] => t
STRINGP t => t -- literal flag types are OK
unknownTypeError t
t
f is ["LISTOF",:l] =>
(for x in l repeat T:= [.,.,e]:= compColon([":",x,t],m,e); T)
e:=
f is [op,:argl] and not (t is ["Mapping",:.]) =>
--for MPOLY--replace parameters by formal arguments: RDJ 3/83
newTarget:= EQSUBSTLIST(take(#argl,$FormalMapVariableList),
[(x is [":",a,m] => a; x) for x in argl],t)
signature:=
["Mapping",newTarget,:
[(x is [":",a,m] => m;
getmode(x,e) or systemErrorHere '"compColonOld") for x in argl]]
put(op,"mode",signature,e)
put(f,"mode",t,e)
if not $bootStrapMode and $insideFunctorIfTrue and
makeCategoryForm(t,e) is [catform,e] then
e:= put(f,"value",[genSomeVariable(),t,$noEnv],e)
["/throwAway",getmode(f,e),e]
unknownTypeError name ==
name:=
name is [op,:.] => op
name
stackSemanticError(["%b",name,"%d","is not a known type"],nil)
compPretend: (%Form,%Mode,%Env) -> %Maybe %Triple
compPretend(["pretend",x,t],m,e) ==
e:= addDomain(t,e)
T:= comp(x,t,e) or comp(x,$EmptyMode,e) or return nil
t' := T.mode -- save this, in case we need to make suggestions
T:= [T.expr,t,T.env]
T':= coerce(T,m) =>
-- If the `pretend' wasn't necessary, we should advise user to use
-- less crude way of selecting expressions of thr `right type'.
if t' = t then
stackWarning('"pretend %1p -- should replace by @",[t])
T'
nil
compColonInside(x,m,e,m') ==
e:= addDomain(m',e)
T:= comp(x,$EmptyMode,e) or return nil
if (m'':=T.mode)=m' then warningMessage:= [":",m'," -- should replace by @"]
T:= [T.expr,m',T.env]
T':= coerce(T,m) =>
if m'' = m' then
stackWarning('": %1p -- should replace by @",[m'])
else
stackWarning('" : %1p -- replace by pretend", [m'])
T'
compIs: (%Form,%Mode,%Env) -> %Maybe %Triple
compIs(["is",a,b],m,e) ==
[aval,am,e] := comp(a,$EmptyMode,e) or return nil
[bval,bm,e] := comp(b,$EmptyMode,e) or return nil
T:= [["domainEqual",aval,bval],$Boolean,e]
coerce(T,m)
--% Functions for coercion by the compiler
-- The function coerce is used by the old compiler for coercions.
-- The function coerceInteractive is used by the interpreter.
-- One should always call the correct function, since the represent-
-- ation of basic objects may not be the same.
coerce: (%Maybe %Triple,%Mode) -> %Maybe %Triple
coerce(T,m) ==
$InteractiveMode =>
keyedSystemError("S2GE0016",['"coerce",
'"function coerce called from the interpreter."])
if $useRepresentationHack then
rplac(CADR T,substitute("$",$Rep,CADR T))
T':= coerceEasy(T,m) => T'
T':= coerceSubset(T,m) => T'
T':= coerceHard(T,m) => T'
-- if from from coerceable, this coerce was just a trial coercion
-- from compFormWithModemap to filter through the modemaps
T.expr = "$fromCoerceable$" or isSomeDomainVariable m => nil
stackMessage('"Cannot coerce %1b of mode %2pb to mode %3pb",
[T.expr,T.mode,m])
coerceEasy: (%Maybe %Triple,%Mode) -> %Maybe %Triple
coerceEasy(T,m) ==
m=$EmptyMode => T
m=$NoValueMode or m=$Void => [T.expr,m,T.env]
T.mode =m => T
T.mode =$NoValueMode => T
T.mode =$Exit =>
[["PROGN", T.expr, ["userError", '"Did not really exit."]],
m,T.env]
T.mode=$EmptyMode or modeEqualSubst(T.mode,m,T.env) =>
[T.expr,m,T.env]
coerceSubset: (%Maybe %Triple,%Mode) -> %Maybe %Triple
coerceSubset([x,m,e],m') ==
isSubset(m,m',e) => [x,m',e]
m is ['SubDomain,=m',:.] => [x,m',e]
(pred:= LASSOC(opOf m',get(opOf m,'SubDomain,e))) and INTEGERP x and
-- obviously this is temporary
eval substitute(x,"#1",pred) => [x,m',e]
(pred:= isSubset(m',maxSuperType(m,e),e)) and INTEGERP x -- again temporary
and eval substitute(x,"*",pred) =>
[x,m',e]
nil
coerceHard: (%Maybe %Triple,%Mode) -> %Maybe %Triple
coerceHard(T,m) ==
$e: local:= T.env
m':= T.mode
STRINGP m' and modeEqual(m,$String) => [T.expr,m,$e]
modeEqual(m',m) or
(get(m',"value",$e) is [m'',:.] or getmode(m',$e) is ["Mapping",m'']) and
modeEqual(m'',m) or
(get(m,"value",$e) is [m'',:.] or getmode(m,$e) is ["Mapping",m'']) and
modeEqual(m'',m') => [T.expr,m,T.env]
STRINGP T.expr and T.expr=m => [T.expr,m,$e]
isCategoryForm(m,$e) =>
$bootStrapMode = true => [T.expr,m,$e]
extendsCategoryForm(T.expr,T.mode,m) => [T.expr,m,$e]
coerceExtraHard(T,m)
(m' = "$" and m = $functorForm) or (m' = $functorForm and m = "$") =>
[T.expr,m,$e]
coerceExtraHard(T,m)
coerceExtraHard: (%Maybe %Triple,%Mode) -> %Maybe %Triple
coerceExtraHard(T is [x,m',e],m) ==
T':= autoCoerceByModemap(T,m) => T'
isUnionMode(m',e) is ["Union",:l] and (t:= hasType(x,e)) and
member(t,l) and (T':= autoCoerceByModemap(T,t)) and
(T'':= coerce(T',m)) => T''
m' is ['Record,:.] and m = $Expression =>
[['coerceRe2E,x,['ELT,COPY m',0]],m,e]
belongsTo?(m',["UnionType"],e) and hasUniqueCaseView(x,m,e) =>
autoCoerceByModemap(T,m)
nil
++ returns true if mode `m' is known to belong to category `cat' in
++ the environment `e'. This function is different from its cousines
++ `ofCategory', or `has'. The latter perform runtime checks. Here,
++ we are interested in a static approximation. So, use with care.
belongsTo?(m,cat,e) ==
c := get(m,"mode",e)
c isnt ["Join",:cats] => nil
member(cat,cats)
coerceable(m,m',e) ==
m=m' => m
-- must find any free parameters in m
sl:= pmatch(m',m) => SUBLIS(sl,m')
coerce(["$fromCoerceable$",m,e],m') => m'
nil
coerceExit: (%Maybe %Triple,%Mode) -> %Maybe %Triple
coerceExit([x,m,e],m') ==
m':= resolve(m,m')
x':= replaceExitEtc(x,catchTag:= MKQ GENSYM(),"TAGGEDexit",$exitMode)
coerce([["CATCH",catchTag,x'],m,e],m')
compAtSign: (%Form,%Mode,%Env) -> %Maybe %Triple
compAtSign(["@",x,m'],m,e) ==
e:= addDomain(m',e)
T:= comp(x,m',e) or return nil
coerce(T,m)
compCoerce: (%Form,%Mode,%Env) -> %Maybe %Triple
compCoerce1: (%Form,%Mode,%Env) -> %Maybe %Triple
coerceByModemap: (%Maybe %Triple,%Mode) -> %Maybe %Triple
autoCoerceByModemap: (%Maybe %Triple,%Mode) -> %Maybe %Triple
compCoerce(["::",x,m'],m,e) ==
e:= addDomain(m',e)
T:= compCoerce1(x,m',e) => coerce(T,m)
getmode(m',e) is ["Mapping",["UnionCategory",:l]] =>
T:= (or/[compCoerce1(x,m1,e) for m1 in l]) or return nil
coerce([T.expr,m',T.env],m)
compCoerce1(x,m',e) ==
T:= comp(x,m',e) or comp(x,$EmptyMode,e) or return nil
m1:=
STRINGP T.mode => $String
T.mode
m':=resolve(m1,m')
T:=[T.expr,m1,T.env]
T':= coerce(T,m') => T'
T':= coerceByModemap(T,m') => T'
pred:=isSubset(m',T.mode,e) =>
gg:=GENSYM()
pred:= substitute(gg,"*",pred)
code:= ['PROG1,['LET,gg,T.expr], ['check_-subtype,pred,MKQ m',gg]]
[code,m',T.env]
coerceByModemap([x,m,e],m') ==
--+ modified 6/27 for new runtime system
u:=
[modemap
for (modemap:= [map,cexpr]) in getModemapList("coerce",1,e) | map is [.,t,
s] and (modeEqual(t,m') or isSubset(t,m',e))
and (modeEqual(s,m) or isSubset(m,s,e))] or return nil
--mm:= (or/[mm for (mm:=[.,[cond,.]]) in u | cond=true]) or return nil
mm:=first u -- patch for non-trival conditons
fn :=
genDeltaEntry ['coerce,:mm]
[["call",fn,x],m',e]
autoCoerceByModemap([x,source,e],target) ==
u:=
[modemap
for (modemap:= [map,cexpr]) in getModemapList("autoCoerce",1,e)
| map is [.,t,s] and modeEqual(t,target)
and modeEqual(s,source)] or return nil
fn:= (or/[mm for (mm := [.,[cond,selfn]]) in u | cond=true]) or return nil
source is ["Union",:l] and member(target,l) =>
(y:= get(x,"condition",e)) and (or/[u is ["case",., =target] for u in y])
=> [["call",genDeltaEntry ["autoCoerce", :fn],x],target,e]
x="$fromCoerceable$" => nil
stackMessage('"cannot coerce %1b of mode %2pb to %3pb without a case statement",
[x,source,target])
[["call",genDeltaEntry ["autoCoerce", :fn],x],target,e]
--% Very old resolve
-- should only be used in the old (preWATT) compiler
resolve(din,dout) ==
din=$NoValueMode or dout=$NoValueMode => $NoValueMode
dout=$EmptyMode => din
din^=dout and (STRINGP din or STRINGP dout) =>
modeEqual(dout,$String) => dout
modeEqual(din,$String) => nil
mkUnion(din,dout)
dout
modeEqual(x,y) ==
-- this is the late modeEqual
-- orders Unions
atom x or atom y => x=y
#x ^=#y => nil
x is ['Union,:xl] and y is ['Union,:yl] =>
for x1 in xl repeat
for y1 in yl repeat
modeEqual(x1,y1) =>
xl := delete(x1,xl)
yl := delete(y1,yl)
return nil
xl or yl => nil
true
(and/[modeEqual(u,v) for u in x for v in y])
modeEqualSubst(m1,m,e) ==
modeEqual(m1, m) => true
atom m1 => get(m1,"value",e) is [m',:.] and modeEqual(m',m)
m1 is [op,:l1] and m is [=op,:l2] and # l1 = # l2 =>
-- Above length test inserted JHD 4:47 on 15/8/86
-- Otherwise Records can get fouled up - consider expressIdealElt
-- in the DEFAULTS package
and/[modeEqualSubst(xm1,xm2,e) for xm1 in l1 for xm2 in l2]
nil
--% Things to support )compile
compileSpad2Cmd args ==
-- This is the old compiler
-- Assume we entered from the "compiler" function, so args ^= nil
-- and is a file with file extension .spad.
path := pathname args
pathnameType path ^= '"spad" => throwKeyedMsg("S2IZ0082", nil)
^PROBE_-FILE path => throwKeyedMsg("S2IL0003",[namestring args])
SETQ(_/EDITFILE, path)
updateSourceFiles path
sayKeyedMsg("S2IZ0038",[namestring args])
optList := '( _
break _
constructor _
functions _
library _
lisp _
new _
old _
nobreak _
nolibrary _
noquiet _
vartrace _
quiet _
translate _
)
translateOldToNew := nil
$scanIfTrue : local := nil
$compileOnlyCertainItems : local := nil
$f : local := nil -- compiler
$m : local := nil -- variables
-- following are for )quick option for code generation
$QuickLet : local := true
fun := ['rq, 'lib]
constructor := nil
$sourceFileTypes : local := '("SPAD")
for opt in $options repeat
[optname,:optargs] := opt
fullopt := selectOptionLC(optname,optList,nil)
fullopt = 'new => error "Internal error: compileSpad2Cmd got )new"
fullopt = 'old => NIL -- no opt
fullopt = 'translate => translateOldToNew := true
fullopt = 'library => fun.1 := 'lib
fullopt = 'nolibrary => fun.1 := 'nolib
-- Ignore quiet/nonquiet if "constructor" is given.
fullopt = 'quiet => if fun.0 ^= 'c then fun.0 := 'rq
fullopt = 'noquiet => if fun.0 ^= 'c then fun.0 := 'rf
fullopt = 'nobreak => $scanIfTrue := true
fullopt = 'break => $scanIfTrue := nil
fullopt = 'vartrace =>
$QuickLet := false
fullopt = 'lisp =>
throwKeyedMsg("S2IZ0036",['")lisp"])
fullopt = 'functions =>
null optargs =>
throwKeyedMsg("S2IZ0037",['")functions"])
$compileOnlyCertainItems := optargs
fullopt = 'constructor =>
null optargs =>
throwKeyedMsg("S2IZ0037",['")constructor"])
fun.0 := 'c
constructor := [unabbrev o for o in optargs]
throwKeyedMsg("S2IZ0036",[STRCONC('")",object2String optname)])
$InteractiveMode : local := nil
if translateOldToNew then
spad2AsTranslatorAutoloadOnceTrigger()
sayKeyedMsg("S2IZ0085", nil)
convertSpadToAsFile path
else if $compileOnlyCertainItems then
null constructor => sayKeyedMsg("S2IZ0040",NIL)
compilerDoitWithScreenedLisplib(constructor, fun)
else
compilerDoit(constructor, fun)
extendLocalLibdb $newConlist
terminateSystemCommand()
spadPrompt()
convertSpadToAsFile path ==
-- can assume path has type = .spad
$globalMacroStack : local := nil -- for spad -> as translator
$abbreviationStack: local := nil -- for spad -> as translator
$macrosAlreadyPrinted: local := nil -- for spad -> as translator
SETQ($badStack, nil) --ditto TEMP to check for bad code
$newPaths: local := true --ditto TEMP
$abbreviationsAlreadyPrinted: local := nil -- for spad -> as translator
$convertingSpadFile : local := true
$options: local := '((nolib)) -- translator shouldn't create nrlibs
SETQ(HT,MAKE_-HASHTABLE 'UEQUAL)
newName := fnameMake(pathnameDirectory path, pathnameName path, '"as")
canDoIt := true
if not fnameWritable? newName then
sayKeyedMsg("S2IZ0086", [NAMESTRING newName])
newName := fnameMake('".", pathnameName path, '"as")
if not fnameWritable? newName then
sayKeyedMsg("S2IZ0087", [NAMESTRING newName])
canDoIt := false
not canDoIt => 'failure
sayKeyedMsg("S2IZ0088", [NAMESTRING newName])
$outStream :local := MAKE_-OUTSTREAM newName
markSay('"#include _"axiom.as_"")
markTerpri()
CATCH("SPAD__READER",compiler [path])
SHUT $outStream
mkCheck()
'done
compilerDoit(constructor, fun) ==
$byConstructors : local := []
$constructorsSeen : local := []
fun = ['rf, 'lib] => _/RQ_,LIB() -- Ignore "noquiet".
fun = ['rf, 'nolib] => _/RF()
fun = ['rq, 'lib] => _/RQ_,LIB()
fun = ['rq, 'nolib] => _/RQ()
fun = ['c, 'lib] =>
$byConstructors := [opOf x for x in constructor]
_/RQ_,LIB()
for ii in $byConstructors repeat
null member(ii,$constructorsSeen) =>
sayBrightly ['">>> Warning ",'%b,ii,'%d,'" was not found"]
compilerDoitWithScreenedLisplib(constructor, fun) ==
EMBED('RWRITE,
'(LAMBDA (KEY VALUE STREAM)
(COND ((AND (EQ STREAM $libFile)
(NOT (MEMBER KEY $saveableItems)))
VALUE)
((NOT NIL)
(RWRITE KEY VALUE STREAM)))) )
UNWIND_-PROTECT(compilerDoit(constructor,fun),
SEQ(UNEMBED 'RWRITE))
--% Categories
compCat(form is [functorName,:argl],m,e) ==
fn:= GETL(functorName,"makeFunctionList") or return nil
[funList,e]:= FUNCALL(fn,form,form,e)
catForm:=
["Join",'(SetCategory),["CATEGORY","domain",:
[["SIGNATURE",op,sig] for [op,sig,.] in funList | op^="="]]]
--RDJ: for coercion purposes, it necessary to know it's a Set; I'm not
--sure if it uses any of the other signatures(see extendsCategoryForm)
[form,catForm,e]
--% Interface to the backend
compileFileQuietly path ==
$OutputStream :=
$InteractiveMode => MAKE_-BROADCAST_-STREAM()
MAKE_-SYNONYM_-STREAM "*STANDARD-OUTPUT*"
COMPILE_-FILE path
--% Register compilers for special forms.
-- Those compilers are on the `SPECIAL' property of the corresponding
-- special form operator symbol.
for x in [["|", :"compSuchthat"],_
["@", :"compAtSign"],_
[":", :"compColon"],_
["::", :"compCoerce"],_
["QUOTE", :"compQuote"],_
["add", :"compAdd"],_
["CAPSULE", :"compCapsule"],_
["case", :"compCase"],_
["CATEGORY", :"compCategory"],_
["COLLECT", :"compRepeatOrCollect"],_
["COLLECTV", :"compCollectV"],_
["CONS", :"compCons"],_
["construct", :"compConstruct"],_
["DEF", :"compDefine"],_
["elt", :"compElt"],_
["Enumeration", :"compCat"],_
["exit", :"compExit"],_
["has", :"compHas"],_
["IF", : "compIf"],_
["import", :"compImport"],_
["is", :"compIs"],_
["Join", :"compJoin"],_
["leave", :"compLeave"],_
["LET", :"compSetq"],_
["MDEF", :"compMacro"],_
["not", :"compileNot"],_
["pretend", :"compPretend"],_
["Record", :"compCat"],_
["RecordCategory", :"compConstructorCategory"],_
["REDUCE", :"compReduce"],_
["REPEAT", :"compRepeatOrCollect"],_
["return", :"compReturn"],_
["SEQ", :"compSeq"],_
["SETQ", :"compSetq"],_
["SubDomain", :"compSubDomain"],_
["SubsetCategory", :"compSubsetCategory"],_
["Union", :"compCat"],_
["Mapping", :"compCat"],_
["UnionCategory", :"compConstructorCategory"],_
["where", :"compWhere"],_
["[||]", :"compileQuasiquote"]] repeat
MAKEPROP(car x, 'SPECIAL, cdr x)
|