path: root/src/interp/br-con.boot

-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2012, Gabriel Dos Reis.
-- All rights reserved.
--
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--     - Redistributions of source code must retain the above copyright
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import bc_-util
namespace BOOT


--=======================================================================
--              Pages Initiated from HyperDoc Pages
--=======================================================================
--NOTE: This duplicate version was discovered 3/20/94 in br-search.boot
--called from buttons via bcCon, bcAbb, bcConform, dbShowCons1, dbSelectCon
--conPage(a,:b) ==
--  --The next 4 lines allow e.g. MATRIX INT  ==> Matrix Integer (see kPage)
--  $conArgstrings: local :=
--    a isnt [.,:.] => b
--    a := conform2OutputForm a
--    [mathform2HtString x for x in rest a]
--  if cons? a then a := first a
--  da := DOWNCASE a
--  pageName := symbolTarget(da,'((type . CategoryType)(union . DomainUnion)(record . DomainRecord)(mapping . DomainMapping))) =>
--    downlink pageName              --special jump out for primitive domains
--  line := conPageFastPath a        => kPage line  --lower case name of cons?
--  line := conPageFastPath UPCASE a => kPage line  --upper case an abbr?
--  ySearch a                        --slow search (include default packages)
--

--called from buttons via bcCon, bcAbb, bcConform, dbShowCons1, dbSelectCon
conPage(a,:b) ==
  --The next 4 lines allow e.g. MATRIX INT  ==> Matrix Integer (see kPage)
  form :=
    a isnt [.,:.] => [a,:b]
    a
  $conArgstrings: local := [form2HtString x for x in KDR a]
  if cons? a then a := first a
  da := DOWNCASE a
  pageName := symbolTarget(da,'((type . CategoryType)(union . DomainUnion)(record . DomainRecord)(mapping . DomainMapping)(enumeration . DomainEnumeration))) =>
    downlink pageName                --special jump out for primitive domains
  line := conPageFastPath da  => kPage(line,form) --lower case name of cons?
  line := conPageFastPath UPCASE a => kPage(line,form) --upper case an abbr?
  ySearch a       --slow search (include default packages)

conPageFastPath x == --called by conPage and constructorSearch
--gets line quickly for constructor name or abbreviation
  s := STRINGIMAGE x
  charPosition(char "*",s,0) < #s => nil     --quit if name has * in it
  name := (string? x => makeSymbol x; x)
  entry := tableValue($lowerCaseConTb,name) or return nil
  lineNumber := symbolTarget('dbLineNumber,CDDR entry) =>
    --'dbLineNumbers property is set by function dbAugmentConstructorDataTable
    dbRead lineNumber --read record for constructor from libdb.text
  conPageConEntry first entry

conPageConEntry entry ==
  $conname: local := nil
  $conform: local := nil
  $exposed?:local := nil
  $doc:     local := nil
  $kind:    local := nil
  buildLibdbConEntry entry

--=======================================================================
--                    Constructor Page
--=======================================================================
conform2String u ==
  x := form2String u
  x isnt [.,:.] => STRINGIMAGE x
  strconc/[STRINGIMAGE y for y in x]

kxPage(htPage,name) == downlink name

kdPageInfo(name,abbrev,nargs,conform,signature,file?) ==
  htSay("{\sf ",name,'"}")
  if abbrev ~= name then bcHt [" has abbreviation ",abbrev]
  if file? then bcHt ['" is a source file."]
  if nargs = 0 then (if abbrev ~= name then bcHt '".")
    else
      if abbrev ~= name then bcHt '" and"
      bcHt
        nargs = 1 => '" takes one argument:"
        [" takes ",toString nargs," arguments:"]
  htSaturnBreak()
  htSayStandard '"\indentrel{2}"
  if nargs > 0 then kPageArgs(conform,signature)
  htSayStandard '"\indentrel{-2}"
  if isDefautPackageName makeSymbol name then
    name := subSequence(name, 0, #name-1)
  sourceFileName := getConstructorSourceFileFromDB makeSymbol name
  filename := extractFileNameFromPath sourceFileName
  if filename ~= '"" then
    htSayStandard '"\newline{}"
    htSay('"The source code for the constructor is found in ")
  htMakePage [['text,'"\unixcommand{",filename,'"}{",textEditor(), '" ",
              sourceFileName, '" ", name, '"}"]]
  if nargs ~= 0 then htSay '"."
  htSaturnBreak()

kArgPage(htPage,arg) ==
  [op,:args] := conform := htpProperty(htPage,'conform)
  domname := htpProperty(htPage,'domname)
  heading := htpProperty(htPage,'heading)
  source := getConstructorModemap(op).mmSource
  n := position(arg,args)
  typeForm := sublisFormal(args,source . n)
  domTypeForm := mkDomTypeForm(typeForm,conform,domname)
  descendants := domainDescendantsOf(typeForm,domTypeForm)
  htpSetProperty(htPage,'cAlist,descendants)
  rank :=
    n > 4 => nil
    ('(First Second Third Fourth Fifth)).n
  htpSetProperty(htPage,'rank,rank)
  htpSetProperty(htPage,'thing,'"argument")
--htpSetProperty(htPage,'specialMessage,['reportCategory,conform,typeForm,arg])
  dbShowCons(htPage,'names)

reportCategory(conform,typeForm,arg) ==
  htSay('"Argument {\em ",arg,'"}")
  [conlist,attrlist,:oplist] := categoryParts(conform,typeForm,true)
  htSay '" must "
  if conlist then
    htSay '"belong to "
    if conlist is [u] then
       htSay('"category ")
       bcConform first u
       bcPred rest u
    else
       htSay('"categories:")
       bcConPredTable(conlist,opOf conform)
       htSay '"\newline "
  if attrlist then
    if conlist then htSay '" and "
    reportAO('"attribute",attrlist)
    htSay '"\newline "
  if oplist then
    if conlist or attrlist then htSay '" and "
    reportAO('"operation",oplist)

reportAO(kind,oplist) ==
  htSay('"have ",kind,'":")
  for [op,sig,:pred] in oplist repeat
    htSay '"\newline "
    if #oplist = 1 then htSay '"\centerline{"
    if kind = '"attribute" then
      attr := form2String [op,:sig]
      satDownLink(attr,['"(|attrPage| '|",attr,'"|)"])
    else
      ops  := escapeSpecialChars STRINGIMAGE op
      sigs := form2HtString ['Mapping,:sig]
      satDownLink(ops,['"(|opPage| '|",ops,'"| |",sigs,'"|)"])
      htSay '": "
      bcConform ['Mapping,:sig]
    if #oplist = 1 then htSay '"}"
  htSay '"\newline "

mkDomTypeForm(typeForm,conform,domname) == --called by kargPage
  domname => applySubst(pairList(conform.args,domname.args),typeForm)
  typeForm is ['Join,:r] => ['Join,:[mkDomTypeForm(t,conform,domname) for t in r]]
  null hasIdent typeForm => typeForm
  nil

domainDescendantsOf(conform,domform) == main where --called by kargPage
  main() ==
    conform is [op,:r] =>
      op is 'Join => jfn(remove(r,'Object),remove(IFCDR domform,'Object))
      op is 'CATEGORY => nil
      domainsOf(conform,domform)
    domainsOf(conform,domform)
  jfn([y,:r],domlist) ==  --keep only those domains that appear in ALL parts of Join
    alist := domainsOf(y,IFCAR domlist)
    for x in r repeat
      domlist := IFCDR domlist
      x is ['CATEGORY,.,:r] => alist := catScreen(r,alist)
      keepList := nil
      for [item,:pred] in domainsOf(x,IFCAR domlist) repeat
        u := assoc(item,alist) =>
          keepList := [[item,:quickAnd(rest u,pred)],:keepList]
      alist := keepList
    for pair in alist repeat 
      pair.rest := simpHasPred rest pair
    listSort(function GLESSEQP, alist)
  catScreen(r,alist) ==
    for x in r repeat
      x isnt [op1,:.] and op1 in '(ATTRIBUTE SIGNATURE) => systemError x
      alist := [[item,:npred] for [item,:pred] in alist |
        (pred1 := simpHasPred ["has",item,x]) and (npred := quickAnd(pred1,pred))]
    alist

--=======================================================================
--                   Branches of Constructor Page
--=======================================================================

kiPage(htPage,junk) ==
  [kind,name,nargs,xflag,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  conform         := mkConform(kind,name,args)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  heading := ['"Description of ", capitalize kind,'" {\sf ",name,args,'"}"]
  page := htInitPage(heading,htCopyProplist htPage)
  $conformsAreDomains := domname
  dbShowConsDoc1(htPage,conform,nil)
  htShowPage()

kePage(htPage,junk) ==
  [kind,name,nargs,xflag,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  constring       := strconc(name,args)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  htpSetProperty(htPage,'domname,domname)
  $conformsAreDomains: local := domname
  conform         := mkConform(kind,name,args)
  conname         := opOf conform
  heading := [capitalize kind,'" {\sf ",
               (domname => form2HtString(domname,nil,true); constring),'"}"]
  data := sublisFormal(IFCDR domname or rest conform,
                       getConstructorExports((domname or conform),true))
  [conlist,attrlist,:oplist] := data
  if domname then
    for x in conlist repeat  x.rest := simpHasPred rest x
    for x in attrlist repeat x.rest.rest := simpHasPred CDDR x
    for x in oplist   repeat x.rest.rest := simpHasPred CDDR x
  prefix := pluralSay(#conlist + #attrlist + #oplist,'"Export",'"Exports")
  page := htInitPage([:prefix,'" of ",:heading],htCopyProplist htPage)
  htSayStandard '"\beginmenu "
  htpSetProperty(page,'data,data)
  if conlist then
    htMakePage [['bcLinks,[menuButton(),'"",'dbShowCons1,conlist,'names]]]
    htSayStandard '"\tab{2}"
    htSay  '"All attributes and operations from:"
    bcConPredTable(conlist,opOf conform,rest conform)
  if attrlist then
    if conlist then htBigSkip()
    kePageDisplay(page,'"attribute",kePageOpAlist attrlist)
  if oplist then
    if conlist or attrlist then htBigSkip()
    kePageDisplay(page,'"operation",kePageOpAlist oplist)
  htSayStandard '" \endmenu "
  htShowPage()

kePageOpAlist oplist ==
  opAlist := nil
  for [op,sig,:pred] in oplist repeat
    u := LASSOC(op,opAlist)
--was 
--    opAlist := insertAlist(op,[[sig,pred],:u],opAlist)
    opAlist := insertAlist(zeroOneConvert op,[[sig,pred],:u],opAlist)
  opAlist

kePageDisplay(htPage,which,opAlist) ==
  count := #opAlist
  total := +/[#(rest entry) for entry in opAlist]
  count = 0 => nil
  if which = '"operation"
    then htpSetProperty(htPage,'opAlist,opAlist)
    else htpSetProperty(htPage,'attrAlist,opAlist)
  expandProperty :=
    which = '"operation" => 'expandOperations
    'expandAttributes
  htpSetProperty(htPage,expandProperty,'lists)  --mark as unexpanded
  htMakePage [['bcLinks,[menuButton(),'"",'dbShowOps,which,'names]]]
  htSayStandard '"\tab{2}"
  if count ~= total then
    if count = 1
    then htSay('"1 name for ")
    else htSay(toString count,'" names for ")
  if total > 1
    then htSay(toString total,'" ",pluralize which,'" are explicitly exported:")
    else htSay('"1 ",which,'" is explicitly exported:")
  htSaySaturn '"\\"
  data := dbGatherData(htPage,opAlist,which,'names)
  dbShowOpItems(which,data,false)

ksPage(htPage,junk) ==
  [kind,name,nargs,xpart,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  heading :=
    null domname => htpProperty(htPage,'heading)
    ['"{\sf ",form2HtString(domname,nil,true),'"}"]
  if domname then
    htpSetProperty(htPage,'domname,domname)
    htpSetProperty(htPage,'heading,heading)
  domain  := (kind = '"category" => nil; eval domname)
  conform:= htpProperty(htPage,'conform)
  page := htInitPageNoScroll(htCopyProplist htPage,
                             ['"Search order for ",:heading])
  htSay '"When an operation is not defined by the domain, the following domains are searched in order for a _"default definition"
  htSayStandard '"\beginscroll "
  u := dbSearchOrder(conform,domname,domain)
  htpSetProperty(htPage,'cAlist,u)
  htpSetProperty(htPage,'thing,'"constructor")
  dbShowCons(htPage,'names)

dbSearchOrder(conform,domname,$domain) ==  --domain = nil or set to live domain
  conform := domname or conform
  name:= opOf conform
  $infovec: local := dbInfovec name or return nil  --exit for categories
  u := $infovec.3
  $predvec:=
    $domain => $domain . 3
    getConstructorPredicates name
  catpredvec := first u
  catinfo    := second u
  catvec     := third u
  catforms := [[pakform,:pred] for i in 0..maxIndex catvec | test ] where
    test() ==
      pred := simpCatPredicate
        p := applySubst(pairList($FormalMapVariableList,conform.args),kTestPred catpredvec.i)
        $domain => eval p
        p
      if domname and CONTAINED('$,pred) then
        pred := substitute(domname,'$,pred)
--    which = '"attribute" => pred    --all categories
      (pak := catinfo . i) and pred   --only those with default packages
    pakform() ==
      pak and not ident? pak => devaluate pak --in case it has been instantiated
      catform := kFormatSlotDomain catvec . i
--    which = '"attribute" => dbSubConform(rest conform,catform)
      res := dbSubConform(rest conform,[pak,"$",:rest catform])
      if domname then res := substitute(domname,'$,res)
      res
  [:dbAddChain conform,:catforms]

kcPage(htPage,junk) ==
  [kind,name,nargs,xpart,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
--  domain          := (kind = '"category" => nil; eval domname)
  conform := htpProperty(htPage,'conform)
  conname := opOf conform
  heading :=
    null domname => htpProperty(htPage,'heading)
    ['"{\sf ",form2HtString(domname,nil,true),'"}"]
  page := htInitPage(['"Cross Reference for ",:heading],htCopyProplist htPage)
  if domname then
    htpSetProperty(htPage,'domname,domname)
    htpSetProperty(htPage,'heading,heading)
  if kind = '"category" and dbpHasDefaultCategory? xpart then
    htSay '"This category has default package "
    bcCon(symbolName makeDefaultPackageName name,'"")
  htSayStandard '"\newline"
  htBeginMenu(3)
  htSayStandard '"\item "
  message :=
    kind = '"category" => ['"Categories it directly extends"]
    ['"Categories the ",(kind = '"default package" => '"package"; kind),'" belongs to by assertion"]
  htMakePage [['bcLinks,['"\menuitemstyle{Parents}",
    [['text,'"\tab{12}",:message]],'kcpPage,nil]]]
  satBreak()
  message :=
    kind = '"category" => ['"All categories it is an extension of"]
    ['"All categories the ",kind,'" belongs to"]
  htMakePage [['bcLinks,['"\menuitemstyle{Ancestors}",
    [['text,'"\tab{12}",:message]],'kcaPage,nil]]]
  if kind = '"category" then
    satBreak()
    htMakePage [['bcLinks,['"\menuitemstyle{Children}",[['text,'"\tab{12}",
      '"Categories which directly extend this category"]],'kccPage,nil]]]

    satBreak()
    htMakePage [['bcLinks,['"\menuitemstyle{Descendants}",[['text,'"\tab{12}",
      '"All categories which extend this category"]],'kcdPage,nil]]]
  satBreak()
  message := '"Constructors mentioning this as an argument type"
  htMakePage [['bcLinks,['"\menuitemstyle{Dependents}",
    [['text,'"\tab{12}",message]],'kcdePage,nil]]]
  satBreak()
  htMakePage [['bcLinks,['"\menuitemstyle{Lineage}",
    '"\tab{12}Constructor hierarchy used for operation lookup",'ksPage,nil]]]
  if kind = '"category" then
   satBreak()
   htMakePage [['bcLinks,['"\menuitemstyle{Domains}",[['text,'"\tab{12}",
     '"All domains which are of this category"]],'kcdoPage,nil]]]
  if kind ~= '"category" then
   satBreak()
   htMakePage [['bcLinks,['"\menuitemstyle{Clients}",'"\tab{12}Constructors",'kcuPage,nil]]]
   if tableValue($defaultPackageNamesHT,conname)
     then htSay('" which {\em may use} this default package")
--  htMakePage [['bcLinks,['"files",'"",'kcuPage,true]]]
     else htSay('" which {\em use} this ",kind)
  if kind ~= '"category" or dbpHasDefaultCategory? xpart then
    satBreak()
    message :=
      kind = '"category" => ['"Constructors {\em used by} its default package"]
      ['"Constructors {\em used by} the ",kind]
    htMakePage [['bcLinks,['"\menuitemstyle{Benefactors}",
      [['text,'"\tab{12}",:message]],'kcnPage,nil]]]
  --to remove "Capsule Information", comment out the next 5 lines
  satBreak()
  message := ['"Cross reference for capsule implementation"]
  htMakePage [['bcLinks,['"\menuitemstyle{CapsuleInfo}",
    [['text,'"\tab{12}",:message]],'kciPage,nil]]]
  htEndMenu(3)
  htShowPage()

kcpPage(htPage,junk) ==
  [kind,name,nargs,xpart,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  heading :=
    null domname => htpProperty(htPage,'heading)
    ['"{\sf ",form2HtString(domname,nil,true),'"}"]
  if domname then
    htpSetProperty(htPage,'domname,domname)
    htpSetProperty(htPage,'heading,heading)
  conform := htpProperty(htPage,'conform)
  conname := opOf conform
  page := htInitPage(['"Parents of ",:heading],htCopyProplist htPage)
  parents := parentsOf conname --was listSort(function GLESSEQP, =this)
  if domname then
    parents := applySubst(pairList(conform.args,domname.args),parents)
  htpSetProperty(htPage,'cAlist,parents)
  htpSetProperty(htPage,'thing,'"parent")
  choice :=
    domname => 'parameters
    'names
  dbShowCons(htPage,choice)

reduceAlistForDomain(alist,domform,conform) == --called from kccPage
  alist := applySubst(pairList(conform.args,domform.args),alist)
  for pair in alist repeat 
    pair.rest := simpHasPred(rest pair,domform)
  [pair for (pair := [.,:pred]) in alist | pred]

kcaPage(htPage,junk) ==
  kcaPage1(htPage,'"category",'" an ",'"ancestor",function ancestorsOf, false)

kcdPage(htPage,junk) ==
  kcaPage1(htPage,'"category",'" a ",'"descendant",function descendantsOf,true)

kcdoPage(htPage,junk)==
  kcaPage1(htPage,'"domain",'" a ",'"descendant",function domainsOf, false)

kcaPage1(htPage,kind,article,whichever,fn, isCatDescendants?) ==
  [kind,name,nargs,xpart,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  heading :=
    null domname => htpProperty(htPage,'heading)
    ['"{\sf ",form2HtString(domname,nil,true),'"}"]
  if domname and not isCatDescendants? then
    htpSetProperty(htPage,'domname,domname)
    htpSetProperty(htPage,'heading,heading)
  conform := htpProperty(htPage,'conform)
  conname := opOf conform
  ancestors := FUNCALL(fn, conform, domname)
  if whichever ~= '"ancestor" then
    ancestors := augmentHasArgs(ancestors,conform)
  ancestors := listSort(function GLESSEQP,ancestors)
--if domname then ancestors := substitute(domname,'$,ancestors)
  htpSetProperty(htPage,'cAlist,ancestors)
  htpSetProperty(htPage,'thing,whichever)
  choice :=
--  domname => 'parameters
    'names
  dbShowCons(htPage,choice)

kccPage(htPage,junk) ==
  [kind,name,nargs,xpart,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  heading :=
    null domname => htpProperty(htPage,'heading)
    ['"{\sf ",form2HtString(domname,nil,true),'"}"]
  if domname then
    htpSetProperty(htPage,'domname,domname)
    htpSetProperty(htPage,'heading,heading)
  conform := htpProperty(htPage,'conform)
  conname := opOf conform
  page := htInitPage(['"Children of ",:heading],htCopyProplist htPage)
  children:= augmentHasArgs(childrenOf conform,conform)
  if domname then children := reduceAlistForDomain(children,domname,conform)
  htpSetProperty(htPage,'cAlist,children)
  htpSetProperty(htPage,'thing,'"child")
  dbShowCons(htPage,'names)

augmentHasArgs(alist,conform) ==
  conname := opOf conform
  args    := KDR conform or return alist
  n       := #args
  [[name,:pred] for [name,:p] in alist] where pred() ==
     extractHasArgs p is [a,:b] => p
     quickAnd(p,['hasArgs,:take(n,KDR getConstructorForm opOf name)])

kcdePage(htPage,junk) ==
  [kind,name,nargs,xflag,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  conname         := makeSymbol name
  constring       := strconc(name,args)
  conform         :=
    kind ~= '"default package" => ncParseFromString constring
    [makeSymbol name,:rest ncParseFromString strconc('"d",args)]  --because of &
  pakname         :=
--  kind = '"category" => makeDefaultPackageName name
    opOf conform
  domList := getDependentsOfConstructor pakname
  cAlist := [[getConstructorForm x,:true] for x in domList]
  htpSetProperty(htPage,'cAlist,cAlist)
  htpSetProperty(htPage,'thing,'"dependent")
  dbShowCons(htPage,'names)

kcuPage(htPage,junk) ==
  [kind,name,nargs,xflag,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  conname         := makeSymbol name
  constring       := strconc(name,args)
  conform         :=
    kind ~= '"default package" => ncParseFromString constring
    [makeSymbol name,:rest ncParseFromString strconc('"d",args)]  --because of &
  pakname         :=
    kind = '"category" => makeDefaultPackageName name
    opOf conform
  domList := getUsersOfConstructor pakname
  cAlist := [[getConstructorForm x,:true] for x in domList]
  htpSetProperty(htPage,'cAlist,cAlist)
  htpSetProperty(htPage,'thing,'"user")
  dbShowCons(htPage,'names)

kcnPage(htPage,junk) ==
--if reached by a category, that category has a default package
  [kind,name,nargs,xpart,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  domname         := kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  heading :=
    null domname => htpProperty(htPage,'heading)
    ['"{\sf ",form2HtString(domname,nil,true),'"}"]
  if domname then
    htpSetProperty(htPage,'domname,domname)
    htpSetProperty(htPage,'heading,heading)
  conform:= htpProperty(htPage,'conform)
  pakname         :=
    kind = '"category" => makeDefaultPackageName symbolName name
    opOf conform
  domList := getImports pakname
  if domname then
    domList := applySubst(pairList(['$,:conform.args],[domname,:domname.args]),domList)
  cAlist := [[x,:true] for x in domList]
  htpSetProperty(htPage,'cAlist,cAlist)
  htpSetProperty(htPage,'thing,'"benefactor")
  dbShowCons(htPage,'names)

koPageInputAreaUnchanged?(htPage, nargs) ==
  [htpLabelInputString(htPage,makeSymbol strconc('"*",toString i)) for i in 1..nargs]
      = htpProperty(htPage,'inputAreaList)

kDomainName(htPage,kind,name,nargs) ==
  htpSetProperty(htPage,'domname,nil)
  inputAreaList :=
    [htpLabelInputString(htPage,var) for i in 1..nargs for var in $PatternVariableList]
  htpSetProperty(htPage,'inputAreaList,inputAreaList)
  conname := makeSymbol name
  args := [kArgumentCheck(domain?,x) or nil for x in inputAreaList
              for domain? in rest getDualSignature conname]
  or/[null x for x in args] =>
    (n := +/[1 for x in args | x]) > 0 =>
      ['error,nil,'"\centerline{You gave values for only {\em ",n,'" } of the {\em ",#args,'"}}",'"\centerline{parameters of {\sf ",name,'"}}\vspace{1}\centerline{Please enter either {\em all} or {\em none} of the type parameters}"]
    nil
  argString :=
    null args => '"()"
    argTailPart :=
      strconc/[strconc/ ['",",:x] for x in KDR args]
    strconc/['"(",:first args,argTailPart,'")"]
  typeForm := CATCH($SpadReaderTag, unabbrev mkConform(kind,name,argString)) or
    ['error,'invalidType,strconc(name,argString)]
  null (evaluatedTypeForm := kisValidType typeForm) =>
    ['error,'invalidType,strconc(name,argString)]
  dbMkEvalable evaluatedTypeForm

kArgumentCheck(domain?,s) ==
  s = '"" => nil
  domain? and (form := conSpecialString? s) =>
    null KDR form => [STRINGIMAGE opOf form]
    form2String form
  [s]

dbMkEvalable form ==
--like mkEvalable except that it does NOT quote domains
--does not do "loadIfNecessary"
  [op,:.] := form
  kind := getConstructorKindFromDB op
  kind = 'category => form
  mkEvalable form

topLevelInterpEval x ==
  $ProcessInteractiveValue: local := true
  $noEvalTypeMsg: local := true
  processInteractive(x,nil)

kisValidType typeForm ==
  $ProcessInteractiveValue: local := true
  $noEvalTypeMsg: local := true
  CATCH($SpadReaderTag, processInteractive(typeForm,nil))
    is [m,:t] and member(m,$LangSupportTypes) =>
      kCheckArgumentNumbers t and t
  false

kCheckArgumentNumbers t ==
  [conname,:args] := t
  cosig := KDR getDualSignature conname
  #cosig ~= #args => false
  and/[foo for domain? in cosig for x in args] where foo() ==
    domain? => kCheckArgumentNumbers x
    true

parseNoMacroFromString(s) ==
   s := next(function ncloopParse,
        next(function lineoftoks,incString s))
   StreamNull s => nil
   pf2Sex second first s
 


mkConform(kind,name,argString) ==
  kind ~= '"default package" =>
    form := strconc(name,argString)
    parse := parseNoMacroFromString form
    null parse =>
      sayBrightlyNT '"Won't parse: "
      pp form
      systemError '"Keywords in argument list?"
    parse isnt [.,:.] => [parse]
    parse
  [makeSymbol name,:rest ncParseFromString strconc('"d",argString)]  --& case

--=======================================================================
--           Operation Page for a Domain Form from Scratch
--=======================================================================
conOpPage(htPage,conform) ==
  updown := dbCompositeWithMap htPage
  updown = '"DOWN" =>
    domname := htpProperty(htPage,'domname)
    conOpPage1(dbExtractUnderlyingDomain domname,[['updomain,:domname]])
  domname := htpProperty(htPage,'updomain)
  conOpPage1(domname,nil)

dbCompositeWithMap htPage ==
  htpProperty(htPage,'updomain) => '"UP"
  domain := htpProperty(htPage,'domname)
  null domain => false
  opAlist := htpProperty(htPage,'opAlist)
--not LASSOC('map,opAlist) => false
  dbExtractUnderlyingDomain htpProperty(htPage,'domname) => '"DOWN"
  false

dbExtractUnderlyingDomain domain == or/[x for x in KDR domain | isValidType x]

--conform is atomic if no parameters, otherwise must be valid domain form
conOpPage1(conform,:options) ==
--constructors    Cname\#\E\sig \args   \abb \comments (C is C, D, P, X)
  bindingsAlist := IFCAR options
  conname       := opOf conform
  builtinFunctorName? conname =>
     dbSpecialOperations conname
  domname         :=                        --> !!note!! <--
    cons? conform => conform
    nil
  line := conPageFastPath conname
  [kind,name,nargs,xflag,sig,args,abbrev,comments]:=parts:= dbXParts(line,7,1)
  isFile := null kind
  kind := kind or '"package"
  parts.first := kind
  constring       := strconc(name,args)
  conform         := mkConform(kind,name,args)
  capitalKind     := capitalize kind
  signature       := ncParseFromString sig
  sourceFileName  := getConstructorSourceFileFromDB makeSymbol name
  emString        := ['"{\sf ",constring,'"}"]
  heading := [capitalKind,'" ",:emString]
  if not isExposedConstructor conname then heading := ['"Unexposed ",:heading]
  page := htInitPage(heading,nil)
  htpSetProperty(page,'isFile,true)
  htpSetProperty(page,'fromConOpPage1,true)
  htpSetProperty(page,'parts,parts)
  htpSetProperty(page,'heading,heading)
  htpSetProperty(page,'kind,kind)
  htpSetProperty(page,'domname,domname)         --> !!note!! <--
  htpSetProperty(page,'conform,conform)
  htpSetProperty(page,'signature,signature)
  if selectedOperation := symbolTarget('selectedOperation,IFCDR options) then
    htpSetProperty(page,'selectedOperation,selectedOperation)
  for [a,:b] in bindingsAlist repeat htpSetProperty(page,a,b)
  koPage(page,'"operation")

--=======================================================================
--           Operation Page from Main Page
--=======================================================================
koPage(htPage,which) ==
  [kind,name,nargs,xflag,sig,args,abbrev,comments] := htpProperty(htPage,'parts)
  constring       := strconc(name,args)
  conname         := makeSymbol name
  domname         :=
    (u := htpProperty(htPage,'domname)) is [=conname,:.]
      and  (htpProperty(htPage,'fromConOpPage1) = true or
             koPageInputAreaUnchanged?(htPage,nargs)) => u
    kDomainName(htPage,kind,name,nargs)
  domname is ['error,:.] => errorPage(htPage,domname)
  htpSetProperty(htPage,'domname,domname)
  headingString :=
    domname => form2HtString(domname,nil,true)
    constring
  heading := [capitalize kind,'" {\sf ",headingString,'"}"]
  htpSetProperty(htPage,'which,which)
  htpSetProperty(htPage,'heading,heading)
  koPageAux(htPage,which,domname,heading)

koPageFromKKPage(htPage,ao) ==
  koPageAux(htPage,ao,htpProperty(htPage,'domname),htpProperty(htPage,'heading))

koPageAux(htPage,which,domname,heading) == --from koPage, koPageFromKKPage
  htpSetProperty(htPage,'which,which)
  domname := htpProperty(htPage,'domname)
  conform := htpProperty(htPage,'conform)
  heading := htpProperty(htPage,'heading)
  opAlist          :=
    which = '"attribute" => koAttrs(conform,domname)
    which = '"general operation" => koOps(conform,domname,true)
    koOps(conform,domname)
  if selectedOperation := htpProperty(htPage,'selectedOperation) then
    opAlist := [assoc(selectedOperation,opAlist) or systemError()]
  dbShowOperationsFromConform(htPage,which,opAlist)

koPageAux1(htPage,opAlist) ==
  which   := htpProperty(htPage,'which)
  dbShowOperationsFromConform(htPage,which,opAlist)

koaPageFilterByName(htPage,functionToCall) ==
  htpLabelInputString(htPage,'filter) = '"" =>
    koaPageFilterByCategory(htPage,functionToCall)
  filter := pmTransFilter(dbGetInputString htPage)
--WARNING: this call should check for ['error,:.] returned
  which   := htpProperty(htPage,'which)
  opAlist :=
      [x for x in htpProperty(htPage,'opAlist) | superMatch?(filter,DOWNCASE STRINGIMAGE first x)]
  htpSetProperty(htPage,'opAlist,opAlist)
  FUNCALL(functionToCall,htPage,nil)

--=======================================================================
--                  Get Constructor Documentation
--=======================================================================

dbConstructorDoc(conform,$op,$sig) == fn conform where
  fn (conform := [conname,:$args]) ==
    or/[gn y for y in getConstructorDocumentationFromDB conname]
  gn([op,:alist]) ==
    op = $op and "or"/[doc or '("") for [sig,:doc] in alist | hn sig]
  hn sig ==
    #$sig = #sig and $sig = applySubst(pairList($FormalMapVariableList,$args),sig)

dbDocTable conform ==
--assumes $docTableHash bound --see dbExpandOpAlistIfNecessary
  table := tableValue($docTableHash,conform) => table
  $docTable : local := hashTable 'EQ
  --process in reverse order so that closest cover up farthest
  for x in originsInOrder conform repeat dbAddDocTable x
  dbAddDocTable conform
  tableValue($docTableHash,conform) := $docTable
  $docTable

originsInOrder conform ==  --domain = nil or set to live domain
--from dcCats
  [con,:argl] := conform
  getConstructorKindFromDB con = "category" =>
      ASSOCLEFT ancestorsOf(conform,nil)
  acc := ASSOCLEFT parentsOfForm conform
  for x in acc repeat
    for y in originsInOrder x repeat acc := insert(y,acc)
  acc

dbAddDocTable conform ==
  conname := opOf conform
  storedArgs := getConstructorForm(conname).args
  for [op,:alist] in applySubst(pairList(["%",:storedArgs],["$",:conform.args]),
    getConstructorDocumentationFromDB opOf conform)
      repeat
       op1 :=
         op = '(Zero) => 0
         op = '(One) => 1
         op
       for [sig,doc] in alist repeat
         tableValue($docTable,op1) := [[conform,:alist],:tableValue($docTable,op1)]
    --note opOf is needed!!! for some reason, One and Zero appear within prens

dbGetDocTable(op,$sig,docTable,$which,aux) == main where
--docTable is [[origin,entry1,...,:code] ...] where
--  each entry is [sig,doc] and code is NIL or else a topic code for op
  main() ==
    if not integer? op and
      digit?((s := STRINGIMAGE op).0) then op := string2Integer s
    -- the above hack should be removed after 3/94 when 0 is not |0|
    aux is [[packageName,:.],:pred] =>
      doc := dbConstructorDoc(first aux,$op,$sig)
      origin :=
        pred => ['ifp,:aux]
        first aux
      [origin,:doc]
    or/[gn x for x in tableValue(docTable,op)]
  gn u ==  --u is [origin,entry1,...,:code]
    $conform := first u              --origin
    if $conform isnt [.,:.] then
      $conform := [$conform]
    code     := LASTATOM u         --optional topic code
    comments := or/[p for entry in rest u | p := hn entry] or return nil
    [$conform,first comments,:code]
  hn [sig,:doc] ==
    $which = '"attribute" => sig is ['attribute,: =$sig] and doc
    pred := #$sig = #sig and
      alteredSig := applySubst(pairList($FormalMapVariableList,KDR $conform),sig)
      alteredSig = $sig
    pred =>
      doc =>
        doc is ['constant,:r] => r
        doc
      '("")
    false

kTestPred n ==
  n = 0 => true
  $domain => testBitVector($predvec,n)
  simpHasPred $predvec.(n - 1)

dbAddChainDomain conform ==
  [name,:args] := conform
  $infovec := dbInfovec name or return nil  --exit for categories
  template := $infovec . 0
  null (form := template . 5) => nil
  dbSubConform(args,kFormatSlotDomain devaluate form)

dbSubConform(args,u) ==
  u isnt [.,:.] =>
    (n := position(u,$FormalMapVariableList)) >= 0 => args . n
    u
  u is ['local,y] => dbSubConform(args,y)
  [dbSubConform(args,x) for x in u]

dbAddChain conform ==
  u := dbAddChainDomain conform =>
    u isnt [.,:.] => nil
    [[u,:true],:dbAddChain u]
  nil

--=======================================================================
--                Constructor Page Menu
--=======================================================================

dbShowCons(htPage,key,:options) ==
  cAlist  := htpProperty(htPage,'cAlist)
  key = 'filter =>
    --if $saturn, IFCAR options is the filter string
    filter := pmTransFilter(IFCAR options or dbGetInputString htPage)
    filter is ['error,:.] => bcErrorPage filter
    abbrev? := htpProperty(htPage,'exclusion) = 'abbrs
    u := [x for x in cAlist | test] where test() ==
      conname := CAAR x
      subject := (abbrev? => getConstructorAbbreviationFromDB conname; conname)
      superMatch?(filter,DOWNCASE STRINGIMAGE subject)
    null u => emptySearchPage('"constructor",filter)
    htPage := htInitPageNoScroll(htCopyProplist htPage)
    htpSetProperty(htPage,'cAlist,u)
    dbShowCons(htPage,htpProperty(htPage,'exclusion))
  if key in '(exposureOn exposureOff) then
    $exposedOnlyIfTrue :=
      key = 'exposureOn => 'T
      nil
    key := htpProperty(htPage,'exclusion)
  dbShowCons1(htPage,cAlist,key)

conPageChoose conname ==
  cAlist := [[getConstructorForm conname,:true]]
  dbShowCons1(nil,cAlist,'names)

dbShowCons1(htPage,cAlist,key) ==
  conlist := removeDuplicates [item for x in cAlist | pred] where
    pred() ==
      item := first x
      $exposedOnlyIfTrue => isExposedConstructor opOf item
      item
--$searchFirstTime and (conlist is [.]) => conPage first conlist
--$searchFirstTime := false
  conlist is [.] => conPage
    htPage and htpProperty(htPage,'domname) => first conlist
    opOf first conlist
  conlist := [opOf x for x in conlist]
  kinds := [dbConstructorKind constructorDB x for x in conlist]
  kind :=
    kinds is [a] => a
    'constructor
  proplist :=
    htPage => htCopyProplist htPage
    nil
  page := htInitPageNoScroll(proplist,dbConsHeading(htPage,conlist,key,kind))
  if u := htpProperty(page,'specialMessage) then apply(first u,rest u)
  htSayStandard('"\beginscroll ")
  htpSetProperty(page,'cAlist,cAlist)
  $conformsAreDomains: local := htpProperty(page,'domname)
  do
  --key = 'catfilter => dbShowCatFilter(page,key)
    key = 'names => bcNameConTable conlist
    key = 'abbrs =>
      bcAbbTable [getCDTEntry(con,true) for con in conlist]
    key = 'files =>
      flist :=
        [y for con in conlist |
          y := (fn := getConstructorSourceFileFromDB con)]
      bcUnixTable(listSort(function GLESSEQP,removeDuplicates flist))
    key = 'documentation   => dbShowConsDoc(page,conlist)
    if $exposedOnlyIfTrue then
      cAlist := [x for x in cAlist | isExposedConstructor opOf first x]
    key = 'conditions =>     dbShowConditions(page,cAlist,kind)
    key = 'parameters => bcConTable removeDuplicates ASSOCLEFT cAlist
    key = 'kinds => dbShowConsKinds cAlist
  dbConsExposureMessage()
  htSayStandard("\endscroll ")
  dbPresentCons(page,kind,key)
  htShowPageNoScroll()


dbConsExposureMessage() ==
  $atLeastOneUnexposed =>
      htSay '"\newline{}-------------\newline{}{\em *} = unexposed"

dbShowConsKindsFilter(htPage,[kind,cAlist]) ==
  htpSetProperty(htPage,'cAlist,cAlist)
  dbShowCons(htPage,htpProperty(htPage,'exclusion))

dbShowConsDoc(htPage,conlist) ==
  null rest conlist => dbShowConsDoc1(htPage,getConstructorForm opOf first conlist,nil)
  cAlist := htpProperty(htPage,'cAlist)
  --the following code is necessary to skip over duplicates on cAlist
  index := 0
  for x in removeDuplicates conlist repeat
  -- for x in conlist repeat
    dbShowConsDoc1(htPage,getConstructorForm x,i) where i() ==
      while CAAAR cAlist ~= x repeat
        index := index + 1
        cAlist := rest cAlist
        null cAlist => systemError ()
      index

dbShowConsDoc1(htPage,conform,indexOrNil) ==
  [conname,:conargs] := conform
  builtinFunctorName? conname =>
    conname := htpProperty(htPage,'conname)
    [["constructor",["NIL",doc]],:.] := property(conname,'documentation)
    sig := '((CATEGORY domain) (SetCategory) (SetCategory))
    displayDomainOp(htPage,'"constructor",conform,conname,sig,true,doc,indexOrNil,'dbSelectCon,nil,nil)
  exposeFlag := isExposedConstructor conname
  doc := getConstructorDocumentation conname
  signature := getConstructorSignature conname
  sig :=
    getConstructorKindFromDB conname = "category" =>
      applySubst(pairList($TriangleVariableList,conargs),signature)
    sublisFormal(conargs,signature)
  htSaySaturn '"\begin{description}"
  displayDomainOp(htPage,'"constructor",conform,conname,sig,true,doc,indexOrNil,'dbSelectCon,null exposeFlag,nil)
  htSaySaturn '"\end{description}"
  --NOTE that we pass conform is as "origin"

getConstructorDocumentation conname ==
  symbolTarget('constructor,getConstructorDocumentationFromDB conname)
    is [[nil,line,:.],:.] and line or '""

dbSelectCon(htPage,which,index) ==
  conPage opOf first htpProperty(htPage,'cAlist).index

dbShowConditions(htPage,cAlist,kind) ==
  conform := htpProperty(htPage,'conform)
  conname := opOf conform
  article := htpProperty(htPage,'article)
  whichever := htpProperty(htPage,'whichever)
  [consNoPred,:consPred] := splitConTable cAlist
  singular := [kind,'" is"]
  plural   := [pluralize STRINGIMAGE kind,'" are"]
  dbSayItems(#consNoPred,singular,plural,'" unconditional")
  htSaySaturn '"\\"
  bcConPredTable(consNoPred,conname)
  htSayHrule()
  dbSayItems(#consPred,singular,plural,'" conditional")
  htSaySaturn '"\\"
  bcConPredTable(consPred,conname)

dbConsHeading(htPage,conlist,view,kind) ==
  thing := htPage and htpProperty(htPage,'thing) or '"constructor"
  place :=
    htPage => htpProperty(htPage,'domname) or htpProperty(htPage,'conform)
    nil
  count := #(removeDuplicates conlist)
  -- count := #conlist
  thing = '"benefactor" =>
    [toString count,'" Constructors Used by ",form2HtString(place,nil,true)]
  modifier :=
    thing = '"argument" =>
      rank := htPage and htpProperty(htPage,'rank)
      ['" Possible ",rank,'" "]
    kind = 'constructor => ['" "]
    ['" ",capitalize STRINGIMAGE kind,'" "]
--  count = 1 =>
--    ['"Select name or a {\em view} at the bottom"]
  exposureWord :=
    $exposedOnlyIfTrue => '(" Exposed ")
    nil
  prefix :=
    count = 1 => [toString count,:modifier,capitalize thing]
    firstWord := (count = 0 => '"No "; toString count)
    [firstWord,:exposureWord, :modifier,capitalize pluralize thing]
  placepart :=
    place => ['" of {\em ",form2HtString(place,nil,true),"}"]
    nil
  heading := [:prefix,:placepart]
  connective :=
    view in '(abbrs files kinds) => '" as "
    '" with "
  if count ~= 0 and view in '(abbrs files parameters conditions) then heading:= [:heading,'" viewed",connective,'"{\em ",STRINGIMAGE view,'"}"]
  heading

dbShowConstructorLines lines ==
  cAlist := [[getConstructorForm intern dbName line,:true] for line in lines]
  dbShowCons1(nil,listSort(function GLESSEQP,cAlist),'names)

bcUnixTable(u) ==
  htSay '"\newline"
  htBeginTable()
  firstTime := true
  for x in u repeat
    if firstTime then firstTime := false
    else htSaySaturn '"&"
    htSay '"{"
    ft := '("SPAD")
    filename := NAMESTRING findFile(STRINGIMAGE x, ft)
    htMakePage [['text, '"\unixcommand{",PATHNAME_-NAME x, '"}{",
                   textEditor(), '" ", filename, '"} "]]
    htSay '"}"
  htEndTable()

--=======================================================================
--             Special Code for Union, Mapping, and Record
--=======================================================================

dbSpecialDescription(conname) ==
  conform := getConstructorForm conname
  heading := ['"Description of Domain {\sf ",form2HtString conform,'"}"]
  page := htInitPage(heading,nil)
  htpSetProperty(page,'conname,conname)
  $conformsAreDomains := nil
  dbShowConsDoc1(page,conform,nil)
  htShowPage()

dbSpecialOperations(conname) ==
  page := htInitPage(nil,nil)
  conform := getConstructorForm conname
  opAlist := dbSpecialExpandIfNecessary(conform,rest property(conname,'documentation))
  fromHeading := ['" from domain {\sf ",form2HtString conform,'"}"]
  htpSetProperty(page,'fromHeading,fromHeading)
  htpSetProperty(page,'conform,conform)
  htpSetProperty(page,'opAlist,opAlist)
  htpSetProperty(page,'noUsage,true)
  htpSetProperty(page,'condition?,'no)
  dbShowOp1(page,opAlist,'"operation",'names)

dbSpecialExports(conname) ==
  conform := getConstructorForm conname
  page := htInitPage(['"Exports of {\sf ",form2HtString conform,'"}"],nil)
  opAlist := dbSpecialExpandIfNecessary(conform,rest property(conname,'documentation))
  kePageDisplay(page,'"operation",opAlist)
  htShowPage()

dbSpecialExpandIfNecessary(conform,opAlist) ==
  opAlist is [[op,[sig,:r],:.],:.] and rest r => opAlist
  for [op,:u] in opAlist repeat
    for pair in u repeat
      [sig,comments] := pair
      pair.rest := ['T,conform,'T,comments] --[sig,pred,origin,exposeFg,doc]
  opAlist

X := '"{\sf Record(a:A,b:B)} is used to create the class of pairs of objects made up of a value of type {\em A} selected by the symbol {\em a} and a value of type {\em B} selected by the symbol {\em b}. "

Y := '"In general, the {\sf Record} constructor can take any number of arguments and thus can be used to create aggregates of heterogeneous components of arbitrary size selectable by name. "

Z := '"{\sf Record} is a primitive domain of \Language{} which cannot be defined in the \Language{} language."

MESSAGE := strconc(X,Y,Z)

PUT('Record,'documentation,substitute(MESSAGE,'MESSAGE,'(
  (constructor (NIL MESSAGE))
 (_=  (((Boolean) _$ _$)
   "\spad{r = s} tests for equality of two records \spad{r} and \spad{s}"))
 (coerce (((OutputForm) _$)
   "\spad{coerce(r)} returns an representation of \spad{r} as an output form")
         ((_$ (List (Any)))
   "\spad{coerce(u)}, where \spad{u} is the list \spad{[x,y]} for \spad{x} of type \spad{A} and \spad{y} of type \spad{B}, returns the record \spad{[a:x,b:y]}"))
 (elt ((A $ "a")
   "\spad{r . a} returns the value stored in record \spad{r} under selector \spad{a}.")
      ((B $ "b")
   "\spad{r . b} returns the value stored in record \spad{r} under selector \spad{b}."))
 (setelt ((A $ "a" A)
   "\spad{r . a := x} destructively replaces the value stored in record \spad{r} under selector \spad{a} by the value of \spad{x}. Error: if \spad{r} has not been previously assigned a value.")
         ((B $ "b" B)
   "\spad{r . b := y} destructively replaces the value stored in record \spad{r} under selector \spad{b} by the value of \spad{y}. Error: if \spad{r} has not been previously assigned a value."))
   )))

X := '"{\sf Union(A,B)} denotes the class of objects which are which are either members of domain {\em A} or of domain {\em B}. The {\sf Union} constructor can take any number of arguments. "

Y := '"For an alternate form of {\sf Union} with _"tags_", see \downlink{Union(a:A,b:B)}{DomainUnion}. {\sf Union} is a primitive domain of \Language{} which cannot be defined in the \Language{} language."

MESSAGE := strconc(X,Y)

PUT('UntaggedUnion,'documentation,substitute(MESSAGE,'MESSAGE,'(
  (constructor (NIL MESSAGE))
  (_=  (((Boolean) $ $)
    "\spad{u = v} tests if two objects of the union are equal, that is, u and v are hold objects of same branch which are equal."))
  (case (((Boolean) $ "A")
    "\spad{u case A} tests if \spad{u} is of the type \spad{A} branch of the union.")
        (((Boolean) $ "B")
    "\spad{u case B} tests if \spad{u} is of the \spad{B} branch of the union."))
  (coerce ((A $)
    "\spad{coerce(u)} returns \spad{x} of type \spad{A} if \spad{x} is of the \spad{A} branch of the union. Error: if \spad{u} is of the \spad{B} branch of the union.")
          ((B $)
    "\spad{coerce(u)} returns \spad{x} of type \spad{B} if \spad{x} is of the \spad{B} branch of the union. Error: if \spad{u} is of the \spad{A} branch of the union.")
          (($ A)
    "\spad{coerce(x)}, where \spad{x} has type \spad{A}, returns \spad{x} as a union type.")
          (($ B)
    "\spad{coerce(y)}, where \spad{y} has type \spad{B}, returns \spad{y} as a union type."))
  )))

X := '"{\sf Union(a:A,b:B)} denotes the class of objects which are either members of domain {\em A} or of domain {\em B}. "

Y := '"The symbols {\em a} and {\em b} are called _"tags_" and are used to identify the two _"branches_" of the union. "

Z := '"The {\sf Union} constructor can take any number of arguments and has an alternate form without {\em tags} (see \downlink{Union(A,B)}{UntaggedUnion}). "

W := '"This tagged {\sf Union} type is necessary, for example, to disambiguate two branches of a union where {\em A} and {\em B} denote the same type. "

A := '"{\sf Union} is a primitive domain of \Language{} which cannot be defined in the \Language{} language."

MESSAGE := strconc(X,Y,Z,W,A)

PUT('Union,'documentation,substitute(MESSAGE,'MESSAGE,'(
  (constructor (NIL MESSAGE))
  (_=  (((Boolean) $ $)
    "\spad{u = v} tests if two objects of the union are equal, that is, \spad{u} and \spad{v} are objects of same branch which are equal."))
  (case (((Boolean) $ "A")
    "\spad{u case a} tests if \spad{u} is of branch \spad{a} of the union.")
                (((Boolean) $ "B")
    "\spad{u case b} tests if \spad{u} is of branch \spad{b} of the union."))
  (coerce ((A $)
    "\spad{coerce(u)} returns \spad{x} of type \spad{A} if \spad{x} is of branch \spad{a} of the union. Error: if \spad{u} is of branch \spad{b} of the union.")
          ((B $)
    "\spad{coerce(u)} returns \spad{x} of type \spad{B} if \spad{x} is of branch \spad{b} branch of the union. Error: if \spad{u} is of the \spad{a} branch of the union.")
          (($ A)
    "\spad{coerce(x)}, where \spad{x} has type \spad{A}, returns \spad{x} as a union type.")
          (($ B)
    "\spad{coerce(y)}, where \spad{y} has type \spad{B}, returns \spad{y} as a union type."))
  )))

X := '"{\sf Mapping(T,S,...)} denotes the class of objects which are mappings from a source domain ({\em S,...}) into a target domain {\em T}. The {\sf Mapping} constructor can take any number of arguments."

Y := '" All but the first argument is regarded as part of a source tuple for the mapping. For example, {\sf Mapping(T,A,B)} denotes the class of mappings from {\em (A,B)} into {\em T}. "

Z := '"{\sf Mapping} is a primitive domain of \Language{} which cannot be defined in the \Language{} language."

MESSAGE := strconc(X,Y,Z)

PUT('Mapping,'documentation, substitute(MESSAGE,'MESSAGE,'(
  (constructor (NIL MESSAGE))
  (_=  (((Boolean) $ $)
    "\spad{u = v} tests if mapping objects are equal."))
   )))

X := '"{\em Enumeration(a1, a2 ,..., aN)} creates an object which is exactly one of the N symbols {\em a1}, {\em a2}, ..., or {\em aN}, N > 0. "

Y := '" The {\em Enumeration} can constructor can take any number of symbols as arguments."

MESSAGE := strconc(X, Y)

PUT('Enumeration, 'documentation, substitute(MESSAGE, 'MESSAGE, '(
  (constructor (NIL MESSAGE))
  (_= (((Boolean) _$ _$)
    "\spad{e = f} tests for equality of two enumerations \spad{e} and \spad{f}"))
  (_~_= (((Boolean) _$ _$)
    "\spad{e ~= f} tests that two enumerations \spad{e} and \spad{f} are nont equal"))
  (coerce (((OutputForm) _$)
     "\spad{coerce(e)} returns a representation of enumeration \spad{r} as an output form")
          ((_$ (Symbol))
     "\spad{coerce(s)} converts a symbol \spad{s} into an enumeration which has \spad{s} as a member symbol"))
  )))


mkConArgSublis args ==
  [[arg,:makeSymbol digits2Names PNAME arg] for arg in args
     | (s := PNAME arg) and
         "or"/[digit? stringChar(s,i) for i in 0..maxIndex s]]

digits2Names s ==
--This is necessary since arguments of conforms CANNOT have digits in TechExplorer
  str := '""
  for i in 0..maxIndex s repeat
    c := stringChar(s,i)
    segment :=
      n := digit? c =>
        ('("Zero" "One" "Two" "Three" "Four" "Five" "Six" "Seven" "Eight" "Nine")).n
      c
    strconc(str, segment)
  str