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|
-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2012, 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 g_-timer
namespace BOOT
--% Cache Lambda Facility
-- for remembering previous values to functions
--to CLAM a function f, there must be an entry on $clamList as follows:
-- (functionName --the name of the function to be CLAMed (e.g. f)
-- kind --"hash" or number of values to be stored in
-- circular list
-- eqEtc --the equal function to be used
-- (EQ, EQUAL, UEQUAL,..)
-- "shift" --(opt) for circular lists, shift most recently
-- used to front
-- "count") --(opt) use reference counts (see below)
--
-- Notes:
-- Functions with "hash" as kind must give EQ, CVEC, or UEQUAL
-- Functions with some other <identifier> as kind hashed as property
-- lists with eqEtc used to compare entries
-- Functions which have 0 arguments may only be CLAMmed when kind is
-- identifier other than hash (circular/private hashtable for no args
-- makes no sense)
--
-- Functions which have more than 1 argument must never be CLAMed with EQ
-- since arguments are cached as lists
-- For circular lists, "count" will do "shift"ing; entries with lowest
-- use count are replaced
-- For cache option without "count", all entries are cleared on garbage
-- collection; For cache option with "count",
-- entries have their use count set
-- to 0 on garbage collection; those with 0 use count at garbage collection
-- are cleared
-- see definition of backendCompile2 in c-util which calls clamComp below
++
$failed := '"failed"
compClam(op,argl,body,$clamList) ==
--similar to reportFunctionCompilation in SLAM BOOT
if $InteractiveMode then startTimingProcess 'compilation
if (u := symbolTarget(op,$clamList)) isnt [kind,eqEtc,:options]
then keyedSystemError("S2GE0004",[op])
$clamList:= nil --clear to avoid looping
if u:= S_-(options,'(shift count)) then
keyedSystemError("S2GE0006",[op,:u])
shiftFl := 'shift in options
countFl := 'count in options
if #argl > 1 and eqEtc= 'EQ then
keyedSystemError("S2GE0007",[op])
(not ident? kind) and (not integer? kind or kind < 1) =>
keyedSystemError("S2GE0005",[op])
ident? kind =>
shiftFl => keyedSystemError("S2GE0008",[op])
compHash(op,argl,body,(kind='hash => nil; kind),eqEtc,countFl)
cacheCount:= kind
if argl = nil then keyedSystemError("S2GE0009",[op])
phrase:=
cacheCount=1 => ['"computed value only"]
[:bright cacheCount,'"computed values"]
sayBrightly [:bright op,'"will save last",:phrase]
auxfn:= makeSymbol strconc(op,'";")
g1:= gensym() --argument or argument list
[arg,computeValue] :=
argl is [.] => [[g1],[auxfn,g1]] --g1 is a parameter
[g1,['APPLY,['function,auxfn],g1]] --g1 is a parameter list
cacheName:= mkCacheName op
if $reportCounts then
hitCounter:= makeSymbol strconc(op,'";hit")
callCounter:= makeSymbol strconc(op,'";calls")
symbolValue(hitCounter) := 0
symbolValue(callCounter) := 0
callCountCode:= [['%store,callCounter,['%iinc,callCounter]]]
hitCountCode:= [['%store,hitCounter,['%iinc,hitCounter]]]
g2:= gensym() --length of cache or arg-value pair
g3:= gensym() --value computed by calling function
lookUpFunction:=
shiftFl =>
countFl => 'assocCacheShiftCount
'assocCacheShift
countFl => 'assocCacheCount
'assocCache
returnFoundValue:=
countFl => ['CDDR,g3]
['%tail,g3]
namePart:=
countFl => cacheName
MKQ cacheName
secondPredPair:=
[['%store,g3,[lookUpFunction,g1,namePart,eqEtc]],
:hitCountCode,
returnFoundValue]
resetCacheEntry:=
countFl => ['%pair,1,g2]
g2
thirdPredPair:=
['%otherwise,
['%store,g2,computeValue],
['%store,g3,['%head,cacheName]],
['%store,['%head,g3],g1],
['%store,['%tail,g3],resetCacheEntry],
g2]
codeBody:= ['PROG,[g2,g3],
:callCountCode,
['RETURN,['%when,secondPredPair,thirdPredPair]]]
mainFunction:= [op,['LAMBDA,arg,codeBody]]
computeFunction:= [auxfn,['LAMBDA,argl,:body]]
-- compile generated function stub
compileInteractive mainFunction
-- compile main body: this has already been compTran'ed
if $reportCompilation then
sayBrightlyI bright '"Generated LISP code for function:"
pp computeFunction
compileQuietly [computeFunction]
cacheType:= 'function
cacheResetCode:= ['%store,cacheName,['initCache,cacheCount]]
cacheCountCode:= ['countCircularAlist,cacheName,cacheCount]
cacheVector:= mkCacheVec(op,cacheName,cacheType,
cacheResetCode,cacheCountCode)
LAM_,EVALANDFILEACTQ ['PUT, MKQ op, MKQ 'cacheInfo, MKQ cacheVector]
LAM_,EVALANDFILEACTQ cacheResetCode
if $InteractiveMode then stopTimingProcess 'compilation
op
compHash(op,argl,body,cacheNameOrNil,eqEtc,countFl) ==
-- Entries will be stored on the global hashtable in a uniform way:
-- (<argument list>, <reference count>,:<value>)
-- where the reference count is optional
if cacheNameOrNil and cacheNameOrNil ~= '_$ConstructorCache then
keyedSystemError("S2GE0010",[op])
--restriction due to omission of call to hputNewValue (see *** lines below)
argl = nil and cacheNameOrNil = nil => keyedSystemError("S2GE0011",[op])
cacheNameOrNil = nil and not (eqEtc in '(EQ EQL EQUAL CVEC UEQUAL)) =>
keyedSystemError("S2GE0012",[op])
auxfn := makeWorkerName op
g1 := --argument or argument list
argl = nil => nil
argl is [g] => g
gensym()
[arg,cacheArgKey,computeValue] :=
-- arg: to be used as formal argument of lambda construction;
-- cacheArgKey: the form used to look up the value in the cache
-- computeValue: the form used to compute the value from arg
argl = nil => [nil,nil,[auxfn]]
argl is [.] =>
key := (cacheNameOrNil => ['devaluate,g1]; g1)
[argl,['%list,key],[auxfn,g1]] --g1 is a parameter
key:= (cacheNameOrNil => ['devaluateList,g1] ; g1)
[g1,key,['APPLY,['function,auxfn],g1]] --g1 is a parameter list
cacheName:= cacheNameOrNil or mkCacheName op
if $reportCounts then
hitCounter:= makeSymbol strconc(op,'";hit")
callCounter:= makeSymbol strconc(op,'";calls")
symbolValue(hitCounter) := 0
symbolValue(callCounter) := 0
callCountCode:= [['%store,callCounter,['%iinc,callCounter]]]
hitCountCode:= [['%store,hitCounter,['%iinc,hitCounter]]]
g2:= gensym() --value computed by calling function
returnFoundValue:=
argl = nil =>
-- if we have a global hastable, functions with no arguments are
-- stored in the same format as those with several arguments, e.g.
-- to cache the value <val> given by f(), the structure
-- ((nil <count> <val>)) is stored in the cache
countFl => ['CDRwithIncrement,['CDAR,g2]]
['CDAR,g2]
countFl => ['CDRwithIncrement,g2]
g2
getCode:=
argl = nil => ['tableValue,cacheName,MKQ op]
cacheNameOrNil =>
eqEtc ~= 'EQUAL =>
['lassocShiftWithFunction,cacheArgKey,
['tableValue,cacheNameOrNil,MKQ op],['%function,eqEtc]]
['lassocShift,cacheArgKey,['tableValue,cacheNameOrNil,MKQ op]]
['tableValue,cacheName,g1]
secondPredPair:= [g2,mkSeq [:hitCountCode,returnFoundValue]]
putCode:=
argl = nil =>
cacheNameOrNil =>
countFl =>
['CDDAR,['%store,['tableValue,cacheNameOrNil,MKQ op],
['%list,['%pair,'%nil,['%pair,1,computeValue]]]]]
['%store,['tableValue,cacheNameOrNil,MKQ op],
['%list,['%pair,'%nil,computeValue]]]
systemError '"unexpected"
cacheNameOrNil => computeValue
countFl =>
['%tail,['%store,['tableValue,cacheName,g1],['%pair,1,computeValue]]]
['%store,['tableValue,cacheName,g1],computeValue]
if cacheNameOrNil then putCode :=
['UNWIND_-PROTECT,['PROG1,putCode,['%store,g2,'%true]],
['%when,[['%not,g2],['tableRemove!,cacheName,MKQ op]]]]
thirdPredPair:= ['%otherwise,putCode]
codeBody:= mkSeq [:callCountCode,
mkBind([[g2,getCode]],['%when,secondPredPair,thirdPredPair])]
mainFunction:= [op,['LAMBDA,arg,codeBody]]
computeFunction:= [auxfn,['LAMBDA,argl,:body]]
-- compile generated function stub
compQuietly [mainFunction]
-- compile main body: this has already been compTran'ed
if $reportCompilation then
sayBrightlyI bright '"Generated LISP code for function:"
pp computeFunction
compQuietly [computeFunction]
if cacheNameOrNil = nil then
cacheType:=
countFl => 'hash_-tableWithCounts
'hash_-table
weakStrong:= (countFl => 'STRONG; 'WEAK)
--note: WEAK means that key/value pairs disappear at garbage collection
cacheResetCode:=
['SETQ,cacheName,['hashTable,MKQ eqEtc]]
cacheCountCode:= ['hashCount,cacheName]
cacheVector:=
mkCacheVec(op,cacheName,cacheType,cacheResetCode,cacheCountCode)
LAM_,EVALANDFILEACTQ ['PUT, MKQ op, MKQ 'cacheInfo, MKQ cacheVector]
LAM_,EVALANDFILEACTQ cacheResetCode
op
CDRwithIncrement x ==
x.first := first x + 1
rest x
HGETandCount(ht,prop) ==
u:= tableValue(ht,prop) or return nil
u.first := first u + 1
u
clearClams() ==
for [fn,kind,:.] in $clamList | kind = 'hash or integer? kind repeat
clearClam fn
clearClam fn ==
infovec := property(fn,'cacheInfo) or keyedSystemError("S2GE0003",[fn])
eval infovec.cacheReset
reportAndClearClams() ==
cacheStats()
clearClams()
clearConstructorCaches() ==
clearCategoryCaches()
CLRHASH $ConstructorCache
clearConstructorCache(cname) ==
(kind := getConstructorKindFromDB cname) =>
kind = "category" => clearCategoryCache cname
tableRemove!($ConstructorCache,cname)
clearConstructorAndLisplibCaches() ==
clearClams()
clearConstructorCaches()
clearCategoryCaches() ==
for name in allConstructors() repeat
if getConstructorKindFromDB name = "category" then
if BOUNDP(cacheName:= mkCacheName name)
then symbolValue(cacheName) := nil
db := constructorDB name =>
dbTemplate(db) := nil
clearCategoryCache catName ==
symbolValue(mkCacheName catName) := nil
displayHashtable x ==
l := sortBy(function first,[[opOf val,key] for [key,:val] in entries x])
for [a,b] in l repeat
sayBrightlyNT ['"%b",a,'"%d"]
pp b
cacheStats() ==
for [fn,kind,:u] in $clamList repeat
not ('count in u) =>
sayBrightly ["%b",fn,"%d","does not keep reference counts"]
integer? kind => reportCircularCacheStats(fn,kind)
kind = 'hash => reportHashCacheStats fn
sayBrightly ["Unknown cache type for","%b",fn,"%d"]
reportCircularCacheStats(fn,n) ==
infovec:= property(fn,'cacheInfo)
circList:= eval infovec.cacheName
numberUsed :=
+/[1 for i in 1..n for x in circList while x isnt ['_$failed,:.]]
sayBrightly ["%b",fn,"%d","has","%b",numberUsed,"%d","/ ",n," values cached"]
displayCacheFrequency mkCircularCountAlist(circList,n)
TERPRI()
displayCacheFrequency al ==
al := sortBy(function first,al)
sayBrightlyNT " #hits/#occurrences: "
for [a,:b] in al repeat sayBrightlyNT [a,"/",b," "]
TERPRI()
mkCircularCountAlist(cl,len) ==
for [x,count,:.] in cl for i in 1..len while x ~= '_$failed repeat
u:= assoc(count,al) => u.rest := 1 + rest u
if integer? $reportFavoritesIfNumber and count >= $reportFavoritesIfNumber then
sayBrightlyNT [" ",count," "]
pp x
al:= [[count,:1],:al]
al
reportHashCacheStats fn ==
infovec:= property(fn,'cacheInfo)
ht := eval infovec.cacheName
hashValues:= [val for [.,:val] in entries ht]
sayBrightly [:bright fn,'"has",:bright(# hashValues),'"values cached."]
displayCacheFrequency mkHashCountAlist hashValues
TERPRI()
mkHashCountAlist vl ==
for [count,:.] in vl repeat
u:= assoc(count,al) => u.rest := 1 + rest u
al:= [[count,:1],:al]
al
clearHashReferenceCounts() ==
--free all cells with 0 reference counts; clear other counts to 0
for x in $clamList repeat
x.cacheType='hash_-tableWithCounts =>
remHashEntriesWith0Count eval x.cacheName
x.cacheType='hash_-table => CLRHASH eval x.cacheName
remHashEntriesWith0Count $hashTable ==
MAPHASH(function fn,$hashTable) where fn(key,obj) ==
first obj = 0 => tableRemove!($hashTable,key) --free store
nil
initCache n ==
tail:= '(0 . $failed)
l:= [[$failed,:tail] for i in 1..n]
lastNode(l).rest := l
assocCache(x,cacheName,fn) ==
--fn=equality function; do not SHIFT or COUNT
al:= eval cacheName
forwardPointer:= al
val:= nil
until sameObject?(forwardPointer,al) repeat
FUNCALL(fn,CAAR forwardPointer,x) => return (val:= first forwardPointer)
backPointer:= forwardPointer
forwardPointer:= rest forwardPointer
val ~= nil => val
symbolValue(cacheName) := backPointer
nil
assocCacheShift(x,cacheName,fn) == --like ASSOC except that al is circular
--fn=equality function; SHIFT but do not COUNT
al:= eval cacheName
forwardPointer:= al
val:= nil
until sameObject?(forwardPointer,al) repeat
FUNCALL(fn, first (y:=first forwardPointer),x) =>
if not sameObject?(forwardPointer,al) then --shift referenced entry to front
forwardPointer.first := first al
al.first := y
return (val:= y)
backPointer := forwardPointer --first is slot replaced on failure
forwardPointer:= rest forwardPointer
val => val
symbolValue(cacheName) := backPointer
nil
assocCacheShiftCount(x,al,fn) ==
-- if x is found, entry containing x becomes first element of list; if
-- x is not found, entry with smallest use count is shifted to front so
-- as to be replaced
--fn=equality function; COUNT and SHIFT
forwardPointer:= al
val:= nil
minCount:= 10000 --preset minCount but not newFrontPointer here
until sameObject?(forwardPointer,al) repeat
FUNCALL(fn, first (y:=first forwardPointer),x) =>
newFrontPointer := forwardPointer
y.rest.first := second y + 1 --increment use count
return (val:= y)
c := second y
if c < minCount then --initial c is 1 so is true 1st time
minCount := c
newFrontPointer := forwardPointer --CAR is slot replaced on failure
forwardPointer:= rest forwardPointer
if not sameObject?(newFrontPointer,al) then --shift referenced entry to front
temp:= first newFrontPointer --or entry with smallest count
newFrontPointer.first := first al
al.first := temp
val
clamStats() ==
for [op,kind,:.] in $clamList repeat
cacheVec:= property(op,'cacheInfo) or systemErrorHere ["clamStats",op]
prefix:=
$reportCounts ~= true => nil
hitCounter:= makeSymbol strconc(op,'";hit")
callCounter:= makeSymbol strconc(op,'";calls")
res:= ["%b",eval hitCounter,"/",eval callCounter,"%d","calls to "]
symbolValue(hitCounter) := 0
symbolValue(callCounter) := 0
res
postString:=
cacheValue:= eval cacheVec.cacheName
kind = 'hash => [" (","%b",tableLength cacheValue,"%d","entries)"]
empties:= numberOfEmptySlots eval cacheVec.cacheName
empties = 0 => nil
[" (","%b",kind-empties,"/",kind,"%d","slots used)"]
sayBrightly
[:prefix,op,:postString]
numberOfEmptySlots cache==
count:= (CAAR cache ='$failed => 1; 0)
for x in tails rest cache while not sameObject?(x,cache) repeat
if CAAR x='$failed then count:= count+1
count
addToConstructorCache(op,args,value) ==
['haddProp,'$ConstructorCache,MKQ op,args,['CONS,1,value]]
haddProp(ht,op,prop,val) ==
--presently, ht always = $ConstructorCache
statRecordInstantiationEvent()
if $reportInstantiations or $reportEachInstantiation then
startTimingProcess 'debug
recordInstantiation(op,prop,false)
stopTimingProcess 'debug
u:= tableValue(ht,op) => --hope that one exists most of the time
assoc(prop,u) => val --value is already there--must = val; exit now
u.rest := [first u,:rest u]
u.first := [prop,:val]
$op: local := op
listTruncate(u,20) --save at most 20 instantiations
val
tableValue(ht,op) := [[prop,:val]]
val
recordInstantiation(op,prop,dropIfTrue) ==
startTimingProcess 'debug
recordInstantiation1(op,prop,dropIfTrue)
stopTimingProcess 'debug
recordInstantiation1(op,prop,dropIfTrue) ==
if $reportEachInstantiation then
trailer:= (dropIfTrue => '" dropped"; '" instantiated")
if $insideCoerceInteractive= true then
$instantCoerceCount:= 1+$instantCoerceCount
if $insideCanCoerceFrom is [m1,m2] and not dropIfTrue then
$instantCanCoerceCount:= 1+$instantCanCoerceCount
xtra:=
['" for ",outputDomainConstructor m1,'"-->",outputDomainConstructor m2]
if $insideEvalMmCondIfTrue and not dropIfTrue then
$instantMmCondCount:= $instantMmCondCount + 1
typeTimePrin ["CONCAT",outputDomainConstructor [op,:prop],trailer,:xtra]
not $reportInstantiations => nil
u:= tableValue($instantRecord,op) => --hope that one exists most of the time
v := LASSOC(prop,u) =>
dropIfTrue => v.rest := 1+rest v
v.first := 1+first v
u.rest := [first u,:rest u]
val :=
dropIfTrue => [0,:1]
[1,:0]
u.first := [prop,:val]
val :=
dropIfTrue => [0,:1]
[1,:0]
tableValue($instantRecord,op) := [[prop,:val]]
reportInstantiations() ==
--assumed to be a hashtable with reference counts
conList:=
[:[[n,m,[key,:argList]] for [argList,n,:m] in item]
for [key,:item] in entries $instantRecord]
sayBrightly ['"# instantiated/# dropped/domain name",
"%l",'"------------------------------------"]
nTotal:= mTotal:= rTotal := nForms:= 0
for [n,m,form] in sortBy(function third,conList) repeat
nTotal:= nTotal+n; mTotal:= mTotal+m
if n > 1 then rTotal:= rTotal + n-1
nForms:= nForms + 1
typeTimePrin ['CONCATB,n,m,outputDomainConstructor form]
sayBrightly ["%b",'"Totals:","%d",nTotal,'" instantiated","%l",
'" ",$instantCoerceCount,'" inside coerceInteractive","%l",
'" ",$instantCanCoerceCount,'" inside canCoerceFrom","%l",
'" ",$instantMmCondCount,'" inside evalMmCond","%l",
'" ",rTotal,'" reinstantiated","%l",
'" ",mTotal,'" dropped","%l",
'" ",nForms,'" distinct domains instantiated/dropped"]
hputNewProp(ht,op,argList,val) ==
--NOTE: obselete if lines *** are commented out
-- Warning!!! This function should only be called for
-- $ConstructorCache slamming --- since it maps devaluate onto prop, an
-- argument list
--
-- This function may be called when property is already there; for
-- example, Polynomial applied to '(Integer), not finding it in the
-- cache will invoke Polynomial to compute it; inside of Polynomial is
-- a call to this function which will hputNewProp the property onto the
-- cache so that when this function is called by the outer Polynomial,
-- the value will always be there
prop:= [devaluate x for x in argList]
haddProp(ht,op,prop,val)
listTruncate(l,n) ==
u:= l
n:= n - 1
while n ~= 0 and cons? u repeat
n := n - 1
u := rest u
if cons? u then
if cons? rest u and $reportInstantiations then
recordInstantiation($op,CAADR u,true)
u.rest := nil
l
lassocShift(x,l) ==
y:= l
while cons? y repeat
x = first first y => return (result := first y)
y:= rest y
result =>
if not sameObject?(y,l) then
y.first := first l
l.first := result
rest result
nil
lassocShiftWithFunction(x,l,fn) ==
y:= l
while cons? y repeat
FUNCALL(fn,x,first first y) => return (result := first y)
y:= rest y
result =>
if not sameObject?(y,l) then
y.first := first l
l.first := result
rest result
nil
lassocShiftQ(x,l) ==
y:= l
while cons? y repeat
sameObject?(x,first first y) => return (result := first y)
y:= rest y
result =>
if not sameObject?(y,l) then
y.first := first l
l.first := result
rest result
nil
-- rassocShiftQ(x,l) ==
-- y:= l
-- while cons? y repeat
-- sameObject?(x,rest first y) => return (result := first y)
-- y:= rest y
-- result =>
-- if not sameObject?(y,l) then
-- y.first := first l
-- l.first := result
-- first result
-- nil
globalHashtableStats(x,sortFn) ==
--assumed to be a hashtable with reference counts
for [key,:u] in entries x repeat
for [argList,n,:.] in u repeat
not integer? n => keyedSystemError("S2GE0013",[x])
argList1:= [constructor2ConstructorForm x for x in argList]
reportList:= [[n,key,argList1],:reportList]
sayBrightly ["%b"," USE NAME ARGS","%d"]
for [n,fn,args] in sortBy(sortFn,reportList) repeat
sayBrightlyNT [:rightJustifyString(n,6)," ",fn,": "]
pp args
constructor2ConstructorForm x ==
vector? x => x.0
x
rightJustifyString(x,maxWidth) ==
size:= entryWidth x
size > maxWidth => keyedSystemError("S2GE0014",[x])
[fillerSpaces(maxWidth-size,char " "),x]
domainEqualList(argl1,argl2) ==
--function used to match argument lists of constructors
while argl1 and argl2 repeat
item1:= devaluate first argl1
item2:= first argl2
partsMatch:=
item1 = item2 => true
false
not partsMatch => return nil
argl1:= rest argl1; argl2 := rest argl2
argl1 or argl2 => nil
true
removeAllClams() ==
for [fun,:.] in $clamList repeat
sayBrightly ['"Un-clamming function",'"%b",fun,'"%d"]
symbolValue(fun) := eval makeSymbol strconc(STRINGIMAGE fun,'";")
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