(* decl.def declaration nodes used to create the AST.

Copyright (C) 2015-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius@glam.ac.uk>.

This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Modula-2; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

DEFINITION MODULE decl ; (*!m2pim*)

FROM nameKey IMPORT Name ;
FROM symbolKey IMPORT performOperation ;
FROM mcReserved IMPORT toktype ;
FROM mcComment IMPORT commentDesc ;

TYPE
   node ;
   isNodeF = PROCEDURE (node) : BOOLEAN ;


(*
   getDeclaredMod - returns the token number associated with the nodes declaration
                    in the implementation or program module.
*)

PROCEDURE getDeclaredMod (n: node) : CARDINAL ;


(*
   getDeclaredDef - returns the token number associated with the nodes declaration
                    in the definition module.
*)

PROCEDURE getDeclaredDef (n: node) : CARDINAL ;


(*
   getFirstUsed - returns the token number associated with the first use of
                  node, n.
*)

PROCEDURE getFirstUsed (n: node) : CARDINAL ;


(*
   isDef - return TRUE if node, n, is a definition module.
*)

PROCEDURE isDef (n: node) : BOOLEAN ;


(*
   isImp - return TRUE if node, n, is an implementation module.
*)

PROCEDURE isImp (n: node) : BOOLEAN ;


(*
   isImpOrModule - returns TRUE if, n, is a program module or implementation module.
*)

PROCEDURE isImpOrModule (n: node) : BOOLEAN ;


(*
   isVisited - returns TRUE if the node was visited.
*)

PROCEDURE isVisited (n: node) : BOOLEAN ;


(*
   unsetVisited - unset the visited flag on a def/imp/module node.
*)

PROCEDURE unsetVisited (n: node) ;


(*
   setVisited - set the visited flag on a def/imp/module node.
*)

PROCEDURE setVisited (n: node) ;


(*
   setEnumsComplete - sets the field inside the def or imp or module, n.
*)

PROCEDURE setEnumsComplete (n: node) ;


(*
   getEnumsComplete - gets the field from the def or imp or module, n.
*)

PROCEDURE getEnumsComplete (n: node) : BOOLEAN ;


(*
   resetEnumPos - resets the index into the saved list of enums inside
                  module, n.
*)

PROCEDURE resetEnumPos (n: node) ;


(*
   getNextEnum - returns the next enumeration node.
*)

PROCEDURE getNextEnum () : node ;


(*
   isModule - return TRUE if node, n, is a program module.
*)

PROCEDURE isModule (n: node) : BOOLEAN ;


(*
   isMainModule - return TRUE if node, n, is the main module specified
                  by the source file.  This might be a definition,
                  implementation or program module.
*)

PROCEDURE isMainModule (n: node) : BOOLEAN ;


(*
   setMainModule - sets node, n, as the main module to be compiled.
*)

PROCEDURE setMainModule (n: node) ;


(*
   setCurrentModule - sets node, n, as the current module being compiled.
*)

PROCEDURE setCurrentModule (n: node) ;


(*
   lookupDef - returns a definition module node named, n.
*)

PROCEDURE lookupDef (n: Name) : node ;


(*
   lookupImp - returns an implementation module node named, n.
*)

PROCEDURE lookupImp (n: Name) : node ;


(*
   lookupModule - returns a module node named, n.
*)

PROCEDURE lookupModule (n: Name) : node ;


(*
   putDefForC - the definition module was defined FOR "C".
*)

PROCEDURE putDefForC (n: node) ;


(*
   lookupInScope - looks up a symbol named, n, from, scope.
*)

PROCEDURE lookupInScope (scope: node; n: Name) : node ;


(*
   isConst - returns TRUE if node, n, is a const.
*)

PROCEDURE isConst (n: node) : BOOLEAN ;


(*
   isType - returns TRUE if node, n, is a type.
*)

PROCEDURE isType (n: node) : BOOLEAN ;


(*
   putType - places, exp, as the type alias to des.
             TYPE des = exp ;
*)

PROCEDURE putType (des, exp: node) ;


(*
   getType - returns the type associated with node, n.
*)

PROCEDURE getType (n: node) : node ;


(*
   skipType - skips over type aliases.
*)

PROCEDURE skipType (n: node) : node ;


(*
   putTypeHidden - marks type, des, as being a hidden type.
                   TYPE des ;
*)

PROCEDURE putTypeHidden (des: node) ;


(*
   isTypeHidden - returns TRUE if type, n, is hidden.
*)

PROCEDURE isTypeHidden (n: node) : BOOLEAN ;


(*
   hasHidden - returns TRUE if module, n, has a hidden type.
*)

PROCEDURE hasHidden (n: node) : BOOLEAN ;


(*
   isVar - returns TRUE if node, n, is a type.
*)

PROCEDURE isVar (n: node) : BOOLEAN ;


(*
   isTemporary - returns TRUE if node, n, is a variable and temporary.
*)

PROCEDURE isTemporary (n: node) : BOOLEAN ;


(*
   isExported - returns TRUE if symbol, n, is exported from
                the definition module.
*)

PROCEDURE isExported (n: node) : BOOLEAN ;


(*
   getDeclScope - returns the node representing the
                  current declaration scope.
*)

PROCEDURE getDeclScope () : node ;


(*
   getScope - returns the scope associated with node, n.
*)

PROCEDURE getScope (n: node) : node ;


(*
   isLiteral - returns TRUE if, n, is a literal.
*)

PROCEDURE isLiteral (n: node) : BOOLEAN ;


(*
   isConstSet - returns TRUE if, n, is a constant set.
*)

PROCEDURE isConstSet (n: node) : BOOLEAN ;


(*
   isEnumerationField - returns TRUE if, n, is an enumeration field.
*)

PROCEDURE isEnumerationField (n: node) : BOOLEAN ;


(*
   isEnumeration - returns TRUE if node, n, is an enumeration type.
*)

PROCEDURE isEnumeration (n: node) : BOOLEAN ;


(*
   isUnbounded - returns TRUE if, n, is an unbounded array.
*)

PROCEDURE isUnbounded (n: node) : BOOLEAN ;


(*
   isParameter - returns TRUE if, n, is a parameter.
*)

PROCEDURE isParameter (n: node) : BOOLEAN ;


(*
   isVarParam - returns TRUE if, n, is a var parameter.
*)

PROCEDURE isVarParam (n: node) : BOOLEAN ;


(*
   isParam - returns TRUE if, n, is a non var parameter.
*)

PROCEDURE isParam (n: node) : BOOLEAN ;


(*
   isNonVarParam - is an alias to isParam.
*)

PROCEDURE isNonVarParam (n: node) : BOOLEAN ;


(*
   addOptParameter - returns an optarg which has been created and added to
                     procedure node, proc.  It has a name, id, and, type,
                     and an initial value, init.
*)

PROCEDURE addOptParameter (proc: node; id: Name; type, init: node) : node ;


(*
   isOptarg - returns TRUE if, n, is an optarg.
*)

PROCEDURE isOptarg (n: node) : BOOLEAN ;


(*
   isRecord - returns TRUE if, n, is a record.
*)

PROCEDURE isRecord (n: node) : BOOLEAN ;


(*
   isRecordField - returns TRUE if, n, is a record field.
*)

PROCEDURE isRecordField (n: node) : BOOLEAN ;


(*
   isVarientField - returns TRUE if, n, is a varient field.
*)

PROCEDURE isVarientField (n: node) : BOOLEAN ;


(*
   isArray - returns TRUE if, n, is an array.
*)

PROCEDURE isArray (n: node) : BOOLEAN ;


(*
   isProcType - returns TRUE if, n, is a procedure type.
*)

PROCEDURE isProcType (n: node) : BOOLEAN ;


(*
   isPointer - returns TRUE if, n, is a pointer.
*)

PROCEDURE isPointer (n: node) : BOOLEAN ;


(*
   isProcedure - returns TRUE if, n, is a procedure.
*)

PROCEDURE isProcedure (n: node) : BOOLEAN ;


(*
   isVarient - returns TRUE if, n, is a varient record.
*)

PROCEDURE isVarient (n: node) : BOOLEAN ;


(*
   isSet - returns TRUE if, n, is a set type.
*)

PROCEDURE isSet (n: node) : BOOLEAN ;


(*
   isSubrange - returns TRUE if, n, is a subrange type.
*)

PROCEDURE isSubrange (n: node) : BOOLEAN ;


(*
   isZtype - returns TRUE if, n, is the Z type.
*)

PROCEDURE isZtype (n: node) : BOOLEAN ;


(*
   isRtype - returns TRUE if, n, is the R type.
*)

PROCEDURE isRtype (n: node) : BOOLEAN ;


(*
   makeConst - create, initialise and return a const node.
*)

PROCEDURE makeConst (n: Name) : node ;


(*
   putConst - places value, v, into node, n.
*)

PROCEDURE putConst (n: node; v: node) ;


(*
   makeType - create, initialise and return a type node.
*)

PROCEDURE makeType (n: Name) : node ;


(*
   makeTypeImp - lookup a type in the definition module
                 and return it.  Otherwise create a new type.
*)

PROCEDURE makeTypeImp (n: Name) : node ;


(*
   makeVar - create, initialise and return a var node.
*)

PROCEDURE makeVar (n: Name) : node ;


(*
   putVar - places, type, as the type for var.
*)

PROCEDURE putVar (var, type, decl: node) ;


(*
   makeVarDecl - creates a variable declaration list from
                 identlist, i, and, type, in the current scope.
*)

PROCEDURE makeVarDecl (i: node; type: node) : node ;


(*
   makeEnum - creates an enumerated type and returns the node.
*)

PROCEDURE makeEnum () : node ;


(*
   makeEnumField - returns an enumeration field, named, n.
*)

PROCEDURE makeEnumField (e: node; n: Name) : node ;


(*
   makeSubrange - returns a subrange node, built from range: low..high.
*)

PROCEDURE makeSubrange (low, high: node) : node ;


(*
   putSubrangeType - assigns, type, to the subrange type, sub.
*)

PROCEDURE putSubrangeType (sub, type: node) ;


(*
   makePointer - returns a pointer of, type, node.
*)

PROCEDURE makePointer (type: node) : node ;


(*
   makeSet - returns a set of, type, node.
*)

PROCEDURE makeSet (type: node) : node ;


(*
   makeArray - returns a node representing ARRAY subrange OF type.
*)

PROCEDURE makeArray (subr, type: node) : node ;


(*
   putUnbounded - sets array, n, as unbounded.
*)

PROCEDURE putUnbounded (n: node) ;


(*
   makeRecord - creates and returns a record node.
*)

PROCEDURE makeRecord () : node ;


(*
   makeVarient - creates a new symbol, a varient symbol for record or varient field
                 symbol, r.
*)

PROCEDURE makeVarient (r: node) : node ;


(*
   addFieldsToRecord - adds fields, i, of type, t, into a record, r.
                       It returns, r.
*)

PROCEDURE addFieldsToRecord (r, v, i, t: node) : node ;


(*
   buildVarientSelector - builds a field of name, tag, of, type, t, varient, r.
*)

PROCEDURE buildVarientSelector (r, v: node; tag: Name; type: node) ;


(*
   buildVarientFieldRecord - builds a varient field into a varient symbol, v.
                             The varient field is returned.
*)

PROCEDURE buildVarientFieldRecord (v: node; p: node) : node ;


(*
   getSymName - returns the name of symbol, n.
*)

PROCEDURE getSymName (n: node) : Name ;


(*
   import - attempts to add node, n, into the scope of module, m.
            It might fail due to a name clash in which case the
            previous named symbol is returned.  On success, n,
            is returned.
*)

PROCEDURE import (m, n: node) : node ;


(*
   lookupExported - attempts to lookup a node named, i, from definition
                    module, n.  The node is returned if found.
                    NIL is returned if not found.
*)

PROCEDURE lookupExported (n: node; i: Name) : node ;


(*
   lookupSym - returns the symbol named, n, from the scope stack.
*)

PROCEDURE lookupSym (n: Name) : node ;


(*
   addImportedModule - add module, i, to be imported by, m.
                       If scoped then module, i, is added to the
                       module, m, scope.
*)

PROCEDURE addImportedModule (m, i: node; scoped: BOOLEAN) ;


(*
   setSource - sets the source filename for module, n, to s.
*)

PROCEDURE setSource (n: node; s: Name) ;


(*
   getSource - returns the source filename for module, n.
*)

PROCEDURE getSource (n: node) : Name ;


(*
   getMainModule - returns the main module node.
*)

PROCEDURE getMainModule () : node ;


(*
   getCurrentModule - returns the current module being compiled.
*)

PROCEDURE getCurrentModule () : node ;


(*
   foreachDefModuleDo - foreach definition node, n, in the module universe,
                        call p (n).
*)

PROCEDURE foreachDefModuleDo (p: performOperation) ;


(*
   foreachModModuleDo - foreach implementation or module node, n, in the module universe,
                        call p (n).
*)

PROCEDURE foreachModModuleDo (p: performOperation) ;


(*
   enterScope - pushes symbol, n, to the scope stack.
*)

PROCEDURE enterScope (n: node) ;


(*
   leaveScope - removes the top level scope and all enumeration transparent scopes.
*)

PROCEDURE leaveScope ;


(*
   makeProcedure - create, initialise and return a procedure node.
*)

PROCEDURE makeProcedure (n: Name) : node ;


(*
   putCommentDefProcedure - remembers the procedure comment (if it exists) as a
                            definition module procedure heading.  NIL is placed
                            if there is no procedure comment available.
*)

PROCEDURE putCommentDefProcedure (n: node) ;


(*
   putCommentModProcedure - remembers the procedure comment (if it exists) as an
                            implementation/program module procedure heading.  NIL is placed
                            if there is no procedure comment available.
*)

PROCEDURE putCommentModProcedure (n: node) ;


(*
   makeProcType - returns a proctype node.
*)

PROCEDURE makeProcType () : node ;


(*
   putReturnType - sets the return type of procedure or proctype, proc, to, type.
*)

PROCEDURE putReturnType (proc, type: node) ;


(*
   putOptReturn - sets, proctype or procedure, proc, to have an optional return type.
*)

PROCEDURE putOptReturn (proc: node) ;


(*
   makeVarParameter - returns a var parameter node with namelist and type.
                      Where the parameters are declared as l: type.
*)

PROCEDURE makeVarParameter (l: node; type, proc: node; isused: BOOLEAN) : node ;


(*
   makeNonVarParameter - returns a non var parameter node with namelist and type.
                         Where the parameters are declared as l: type.
*)

PROCEDURE makeNonVarParameter (l: node; type, proc: node; isused: BOOLEAN) : node ;


(*
   paramEnter - reset the parameter count.
*)

PROCEDURE paramEnter (n: node) ;


(*
   paramLeave - set paramater checking to TRUE from now onwards.
*)

PROCEDURE paramLeave (n: node) ;


(*
   makeIdentList - returns a node which will be used to maintain an ident list.
*)

PROCEDURE makeIdentList () : node ;


(*
   putIdent - places ident, i, into identlist, n.
*)

PROCEDURE putIdent (n: node; i: Name) : BOOLEAN ;


(*
   addVarParameters - adds the identlist, i, of, type, to be VAR parameters
                      in procedure, n.
*)

PROCEDURE addVarParameters (n: node; i: node; type: node; isused: BOOLEAN) ;


(*
   addNonVarParameters - adds the identlist, i, of, type, to be parameters
                         in procedure, n.
*)

PROCEDURE addNonVarParameters (n: node; i: node; type: node; isused: BOOLEAN) ;


(*
   makeVarargs - returns a varargs node.
*)

PROCEDURE makeVarargs () : node ;


(*
   isVarargs - returns TRUE if, n, is a varargs node.
*)

PROCEDURE isVarargs (n: node) : BOOLEAN ;


(*
   addParameter - adds a parameter, param, to procedure or proctype, proc.
*)

PROCEDURE addParameter (proc, param: node) ;


(*
   makeBinaryTok - creates and returns a boolean type node with,
                   l, and, r, nodes.
*)

PROCEDURE makeBinaryTok (op: toktype; l, r: node) : node ;


(*
   makeUnaryTok - creates and returns a boolean type node with,
                  e, node.
*)

PROCEDURE makeUnaryTok (op: toktype; e: node) : node ;


(*
   makeComponentRef - build a componentref node which accesses, field,
                      within, record, rec.
*)

PROCEDURE makeComponentRef (rec, field: node) : node ;


(*
   makePointerRef - build a pointerref node which accesses, field,
                    within, pointer to record, ptr.
*)

PROCEDURE makePointerRef (ptr, field: node) : node ;


(*
   isPointerRef - returns TRUE if, n, is a pointerref node.
*)

PROCEDURE isPointerRef (n: node) : BOOLEAN ;


(*
   makeDeRef - dereferences the pointer defined by, n.
*)

PROCEDURE makeDeRef (n: node) : node ;


(*
   makeArrayRef - build an arrayref node which access element,
                  index, in, array.  array is a variable/expression/constant
                  which has a type array.
*)

PROCEDURE makeArrayRef (array, index: node) : node ;


(*
   getLastOp - return the right most non leaf node.
*)

PROCEDURE getLastOp (n: node) : node ;


(*
   getCardinal - returns the cardinal type node.
*)

PROCEDURE getCardinal () : node ;


(*
   makeLiteralInt - creates and returns a literal node based on an integer type.
*)

PROCEDURE makeLiteralInt (n: Name) : node ;


(*
   makeLiteralReal - creates and returns a literal node based on a real type.
*)

PROCEDURE makeLiteralReal (n: Name) : node ;


(*
   makeString - creates and returns a node containing string, n.
*)

PROCEDURE makeString (n: Name) : node ;


(*
   makeSetValue - creates and returns a setvalue node.
*)

PROCEDURE makeSetValue () : node ;


(*
   isSetValue - returns TRUE if, n, is a setvalue node.
*)

PROCEDURE isSetValue (n: node) : BOOLEAN ;


(*
   putSetValue - assigns the type, t, to the set value, n.  The
                 node, n, is returned.
*)

PROCEDURE putSetValue (n, t: node) : node ;


(*
   includeSetValue - includes the range l..h into the setvalue.
                     h might be NIL indicating that a single element
                       is to be included into the set.
                     n is returned.
*)

PROCEDURE includeSetValue (n: node; l, h: node) : node ;


(*
   getBuiltinConst - creates and returns a builtin const if available.
*)

PROCEDURE getBuiltinConst (n: Name) : node ;


(*
   makeExpList - creates and returns an expList node.
*)

PROCEDURE makeExpList () : node ;


(*
   isExpList - returns TRUE if, n, is an explist node.
*)

PROCEDURE isExpList (n: node) : BOOLEAN ;


(*
   putExpList - places, expression, e, within the explist, n.
*)

PROCEDURE putExpList (n: node; e: node) ;


(*
   makeConstExp - returns a constexp node.
*)

PROCEDURE makeConstExp () : node ;


(*
   getNextConstExp - returns the next constexp node.
*)

PROCEDURE getNextConstExp () : node ;


(*
   setConstExpComplete - sets the field inside the def or imp or module, n.
*)

PROCEDURE setConstExpComplete (n: node) ;


(*
   fixupConstExp - assign fixup expression, e, into the argument of, c.
*)

PROCEDURE fixupConstExp (c, e: node) : node ;


(*
   resetConstExpPos - resets the index into the saved list of constexps inside
                      module, n.
*)

PROCEDURE resetConstExpPos (n: node) ;


(*
   makeFuncCall - builds a function call to c with param list, n.
*)

PROCEDURE makeFuncCall (c, n: node) : node ;


(*
   makeStatementSequence - create and return a statement sequence node.
*)

PROCEDURE makeStatementSequence () : node ;


(*
   isStatementSequence - returns TRUE if node, n, is a statement sequence.
*)

PROCEDURE isStatementSequence (n: node) : BOOLEAN ;


(*
   addStatement - adds node, n, as a statement to statememt sequence, s.
*)

PROCEDURE addStatement (s: node; n: node) ;


(*
   addCommentBody - adds a body comment to a statement sequence node.
*)

PROCEDURE addCommentBody (n: node) ;


(*
   addCommentAfter - adds an after comment to a statement sequence node.
*)

PROCEDURE addCommentAfter (n: node) ;


(*
   addIfComments - adds the, body, and, after, comments to if node, n.
*)

PROCEDURE addIfComments (n: node; body, after: node) ;


(*
   addElseComments - adds the, body, and, after, comments to an, if, or an elsif, node, n.
*)

PROCEDURE addElseComments (n: node; body, after: node) ;


(*
   addIfEndComments - adds the, body, and, after, comments to an, if, node, n.
*)

PROCEDURE addIfEndComments (n: node; body, after: node) ;


(*
   makeReturn - creates and returns a return node.
*)

PROCEDURE makeReturn () : node ;


(*
   isReturn - returns TRUE if node, n, is a return.
*)

PROCEDURE isReturn (n: node) : BOOLEAN ;


(*
   putReturn - assigns node, e, as the expression on the return node.
*)

PROCEDURE putReturn (n: node; e: node) ;


(*
   makeWhile - creates and returns a while node.
*)

PROCEDURE makeWhile () : node ;


(*
   putWhile - places an expression, e, and statement sequence, s, into the while
              node, n.
*)

PROCEDURE putWhile (n: node; e, s: node) ;


(*
   isWhile - returns TRUE if node, n, is a while.
*)

PROCEDURE isWhile (n: node) : BOOLEAN ;


(*
   addWhileDoComment - adds body and after comments to while node, w.
*)

PROCEDURE addWhileDoComment (w: node; body, after: node) ;


(*
   addWhileEndComment - adds body and after comments to the end of a while node, w.
*)

PROCEDURE addWhileEndComment (w: node; body, after: node) ;


(*
   makeAssignment - creates and returns an assignment node.
                    The designator is, d, and expression, e.
*)

PROCEDURE makeAssignment (d, e: node) : node ;


(*
   putBegin - assigns statements, s, to be the normal part in
              block, b.  The block may be a procedure or module,
              or implementation node.
*)

PROCEDURE putBegin (b: node; s: node) ;


(*
   putFinally - assigns statements, s, to be the final part in
                block, b.  The block may be a module
                or implementation node.
*)

PROCEDURE putFinally (b: node; s: node) ;


(*
   makeExit - creates and returns an exit node.
*)

PROCEDURE makeExit (l: node; n: CARDINAL) : node ;


(*
   isExit - returns TRUE if node, n, is an exit.
*)

PROCEDURE isExit (n: node) : BOOLEAN ;


(*
   makeLoop - creates and returns a loop node.
*)

PROCEDURE makeLoop () : node ;


(*
   isLoop - returns TRUE if, n, is a loop node.
*)

PROCEDURE isLoop (n: node) : BOOLEAN ;


(*
   putLoop - places statement sequence, s, into loop, l.
*)

PROCEDURE putLoop (l, s: node) ;


(*
   makeComment - creates and returns a comment node.
*)

PROCEDURE makeComment (a: ARRAY OF CHAR) : node ;


(*
   makeCommentS - creates and returns a comment node.
*)

PROCEDURE makeCommentS (c: commentDesc) : node ;


(*
   makeIf - creates and returns an if node.  The if node
            will have expression, e, and statement sequence, s,
            as the then component.
*)

PROCEDURE makeIf (e, s: node) : node ;


(*
   isIf - returns TRUE if, n, is an if node.
*)

PROCEDURE isIf (n: node) : BOOLEAN ;


(*
   makeElsif - creates and returns an elsif node.
               This node has an expression, e, and statement
               sequence, s.
*)

PROCEDURE makeElsif (i, e, s: node) : node ;


(*
   isElsif - returns TRUE if node, n, is an elsif node.
*)

PROCEDURE isElsif (n: node) : BOOLEAN ;


(*
   putElse - the else is grafted onto the if/elsif node, i,
             and the statement sequence will be, s.
*)

PROCEDURE putElse (i, s: node) ;


(*
   makeFor - creates and returns a for node.
*)

PROCEDURE makeFor () : node ;


(*
   isFor - returns TRUE if node, n, is a for node.
*)

PROCEDURE isFor (n: node) : BOOLEAN ;


(*
   putFor - assigns the fields of the for node with
            ident, i,
            start, s,
            end, e,
            increment, i,
            statements, sq.
*)

PROCEDURE putFor (f, i, s, e, b, sq: node) ;


(*
   makeRepeat - creates and returns a repeat node.
*)

PROCEDURE makeRepeat () : node ;


(*
   isRepeat - returns TRUE if node, n, is a repeat node.
*)

PROCEDURE isRepeat (n: node) : BOOLEAN ;


(*
   putRepeat - places statements, s, and expression, e, into
               repeat statement, n.
*)

PROCEDURE putRepeat (n, s, e: node) ;


(*
   addRepeatComment - adds body and after comments to repeat node, r.
*)

PROCEDURE addRepeatComment (r: node; body, after: node) ;


(*
   addUntilComment - adds body and after comments to the until section of a repeat node, r.
*)

PROCEDURE addUntilComment (r: node; body, after: node) ;


(*
   makeCase - builds and returns a case statement node.
*)

PROCEDURE makeCase () : node ;


(*
   isCase - returns TRUE if node, n, is a case statement.
*)

PROCEDURE isCase (n: node) : BOOLEAN ;


(*
   putCaseExpression - places expression, e, into case statement, n.
                       n is returned.
*)

PROCEDURE putCaseExpression (n: node; e: node) : node ;


(*
   putCaseElse - places else statement, e, into case statement, n.
                 n is returned.
*)

PROCEDURE putCaseElse (n: node; e: node) : node ;


(*
   putCaseStatement - places a caselist, l, and associated
                      statement sequence, s, into case statement, n.
                      n is returned.
*)

PROCEDURE putCaseStatement (n: node; l: node; s: node) : node ;


(*
   makeCaseLabelList - creates and returns a caselabellist node.
*)

PROCEDURE makeCaseLabelList (l, s: node) : node ;


(*
   isCaseLabelList - returns TRUE if, n, is a caselabellist.
*)

PROCEDURE isCaseLabelList (n: node) : BOOLEAN ;


(*
   makeCaseList - creates and returns a case statement node.
*)

PROCEDURE makeCaseList () : node ;


(*
   isCaseList - returns TRUE if, n, is a case list.
*)

PROCEDURE isCaseList (n: node) : BOOLEAN ;


(*
   putCaseRange - places the case range lo..hi into caselist, n.
*)

PROCEDURE putCaseRange (n: node; lo, hi: node) : node ;


(*
   makeRange - creates and returns a case range.
*)

PROCEDURE makeRange (lo, hi: node) : node ;


(*
   isRange - returns TRUE if node, n, is a range.
*)

PROCEDURE isRange (n: node) : BOOLEAN ;


(*
   setNoReturn - sets noreturn field inside procedure.
*)

PROCEDURE setNoReturn (n: node; value: BOOLEAN) ;


(*
   dupExpr - duplicate the expression nodes, it does not duplicate
             variables, literals, constants but only the expression
             operators (including function calls and parameter lists).
*)

PROCEDURE dupExpr (n: node) : node ;


(*
   setLangC - set the target language as ansi C.
*)

PROCEDURE setLangC ;


(*
   setLangCP - set the target language as C++.
*)

PROCEDURE setLangCP ;


(*
   setLangM2 - set the target language as Modula-2.
*)

PROCEDURE setLangM2 ;


(*
   out - walks the tree of node declarations for the main module
         and writes the output to the outputFile specified in
         mcOptions.  It outputs the declarations in the language
         specified above.
*)

PROCEDURE out ;


END decl.