defchild

Overview
Syntax
Examples
Argument Types
AIS Component Systems

Overview

The defchild Macro creates a new Lambda object and assigns it to the specified persistent variable name {child} of the parent Lambda {parent}. The defchild Macro always returns the newly created Lambda object. Following the defchild Macro, the new Lambda will be invoked whenever the child member of the parent Lambda is referenced.

For instance below we define a math Lambda, use the defchild macro to add a child Lambda, and then invoke the math Lambda and a few of its child Lambdas.


        (defun math(Number:z)

           pvars:((myX 100.0))

           (defun add(Number:z)

              (+ myX z)) ;; end of add function

        

           ;;.... other child functions here

        

           (- myX z)) ;; end of math function

        

        (defchild math:mul(Number:z)

            (* myX z)) ;; end of mul function

        

        ;; Invoking the various child functions of the math Lambda

        (math 22.0) ;; returns 88.0

        (math.add 10.0) ;; returns 110.0

        (math.mul 10.0) ;; returns 1000.0

Usage

Use the defchild when the parent Lambda and all its children are too large for one source file, or when you wish each child Lambda to be defined in a separate source file from the parent.

Syntax

Expression:	(defchild parent:child(arg...) faces:(var...) pvars:(var...) cvars:(var...) regs:(var...) vars:(var...) exp...) (defchild parent child(arg...) faces:(var...) pvars:(var...) cvars:(var...) regs:(var...) vars:(var...) exp...) (defchild parent.mem child(arg...) faces:(var...) pvars:(var...) cvars:(var...) regs:(var...) vars:(var...) exp...)

Arguments	Name	Type	Description
Argument:	parent:	Symbol	The Parent Lambda that the child will be associated with.
Argument:	child:	Symbol	The name of the new Lambda object (the Child Lambda).
Argument:	(arg...)	---	Optional Argument. Argument list for the Lambda.
Argument:	faces:(var...)	Symbol	Optional Argument. If present, must be followed by a interfaces feature list.
Argument:	vars:(var...)	Symbol	Optional Argument. If present, must be followed by a local variable list.
Argument:	pvars:(var...)	Symbol	Optional Argument. If present, must be followed by a persistent variable list.
Argument:	cvars:(var...)	Symbol	Optional Argument. If present, must be followed by a persistent class variable list.
Argument:	regs:(var...)	Symbol	Optional Argument. If present, must be followed by a register variable list (up to fifty register variables are allowed).
Argument:	exp...	---	The Lisp statements that forms the Lambdas

Returns:	An Lambda that will be assigned the name {child}.

Examples

Here are a number of links to Lambda coding examples which contain this instruction in various use cases.

Argument Types

Here are the links to the data types of the function arguments.

Lambda

Symbol

Here are also a number of links to functions having arguments with any of these data types.

++	+=	/=	*=
--	-=	addMethod	append
apply	argCount	argFetch	attachLibrarian
balance	binaryInsert	binarySearch	boolean
callcc	cdr	character	class
compareEQ	compareGE	compareGT	compareLE
compareLT	compareNE	compare	comparison
compile	compress	cons	copy
count	debugBrowsableProcs	debug	defchild
defclass	define(macro)	define	defmacro
defmethod	deforphan	defriend	defun
delete	detachLibrarian	dimension	disassemble
display	downcase	encode	evalInSyncLocalContext
eval	exportCsv	exportSbf	exportTab
gc	getGlobalValue	getSymbolTable	globalBinding
importCsv	importSbf	importTab	insert
inside	inspect	integer	isAtom
isBitVector	isBoolean	isByteVector	isCharAlphabetic
isCharAlphanumeric	isCharLowercase	isCharName	isCharNumeric
isCharUppercase	isCharWhitespace	isChar	isCharacter
isClass	isComplex	isDate	isDictionary
isDirectory	isEqual	isError	isFloatVector
isIdentical	isInside	isIntegerVector	isInteger
isLambda	isMatrix	isMember	isMoney
isNumberMatrix	isNumberVector	isNumber	isObjectVector
isObject	isPair	isPcodeVector	isString
isStructure	isSymbol	isText	isType
isVector	lambda	length	lisp
list	lock	macroReplace	makeLambda
makeQuotedList	makeQuotedSymbol	member	methodsOf
money	myself	new	number
offset	onError	openLog	pair
parent	parse	pointer	proplist
proprecord	putprop	qt	refLibrarian
ref	remProp	remove	rename
saveObject	saveRepository	send	setCar
setCdr	setLastCdr	set	setf
setq	sizeof	sql	string
super	svmRegression	symbolToTypeCode	symbol
type	uniqueInsert	unlock	vectorFill
writelg	writeln

Analytic Information Server (AIS)

AIS Component Systems

Smartbase Engine

QT C++ Libraries

MySQL Relational Database

AIS Lisp Libraries

Rapid Analytic Demo IDE