Example Function defmethod 016

 

 

Description

This example defines a method named evalFun that is invoked when the Function type receives a eval message. The evalFun method takes function with a single parameter, coerces the parameter to an integer and returns the result after evaluating the function.

 

Details

First Define the evalFun method:

(defmethod Function: eval (fname arg) (fname (integer arg) ) ) Returns: #<Lambda 123456>

If the Function type is sent the eval message, the Lambda created by the defmethod macro is invoked to return evaluate the function after it converts the argument to an Integer. To invoke the Lambda that responds to the eval message, issue the following statement:

(send eval: add1 96.1 ) Returns: 97

Alternatively, the Lambda may be invoked using the following syntax:

(eval: add1 96.1 ) Returns: 97

Notes and Hints

To view the entry in the methods Dictionary created by the defmethod function, you can use the method name to access the directory entry by

#<Dictionary 123456>[methodName:] or

To determine the number of assigned methods:

(length (methodsOf Function: ))

To access the nth method name:

(methodsOf Function: )[n 0]

 

Related Examples

Here are examples of the defmethod function at work.

BitVector defmethod 020 Boolean defmethod 012 Character defmethod 013 Date defmethod 015
FltVector defmethod 017 Function defmethod 016 IntVector defmethod 018 List defmethod 022
NumVector defmethod 019 Number defmethod 014 ObjectRepository defmethod 023 Pair defmethod 021
ShortVector defmethod 019 Structure defmethod 004 Structure defmethod 005 Vector defmethod 008
Void defmethod 011

 

Function Links

Here is the link to the current function used in this example.

defmethod

Here are a number of links to other related functions.

addMethod(Function) send(Function) methodsOf(Function)

 

Argument Types

Here are the links to the data types of the arguments used in this example.

Symbol Dictionary

Here are a number of links to examples having similar argument types.

BitVector addMethod 023 BitVector defmethod 020 BitVector methodsOf 021 BitVector send 018
Boolean addMethod 011 Boolean addMethod 012 Boolean defmethod 012 Boolean methodsOf 012
Boolean send 010 Brick addMethod 008 Brick defmethod 025 Brick methodsOf 024
Brick send 027 ByteVector isCharAlphabetic 003 ByteVector isCharAlphanumeric 003 ByteVector isCharLowercase 003
ByteVector isCharName 003 ByteVector isCharNumeric 003 ByteVector isCharUppercase 003 ByteVector isCharWhitespace 003
Character addMethod 013 Character defmethod 013 Character methodsOf 013 Character send 011
Context debug 001 Context getGlobalValue 001 Context getSymbolTable 001 Context globalBinding 001
CpxVector addMethod 028 CpxVector send 028 Date addMethod 015 Date addMethod 016
Date defmethod 015 Date methodsOf 015 Date send 013 Dictionary addMethod 005
Dictionary binarySearch 002 Dictionary cdr 003 Dictionary compare 004 Dictionary compareEQ 004
Dictionary compareGE 004 Dictionary compareGT 004 Dictionary compareLE 004 Dictionary compareLT 004
Dictionary compareNE 004 Dictionary comparison functions 004 Dictionary copy 002 Dictionary count 002
Dictionary defMethod 006 Dictionary delete 003 Dictionary delete 004 Dictionary insert 002
Dictionary inside 002 Dictionary isAtom 002 Dictionary isBound 002 Dictionary isDictionary 001
Dictionary isEqual 002 Dictionary isIdentical 002 Dictionary isInside 002 Dictionary isMember 002
Dictionary isObject 004 Dictionary isType 006 Dictionary length 005 Dictionary makeDictionary 001
Dictionary map 002 Dictionary mapc 002 Dictionary member 002 Dictionary methodsOf 007
Dictionary new 004 Dictionary objectToDictionary 001 Dictionary objectToDictionary 002 Dictionary objectToDictionary 003
Dictionary objectToDictionary 004 Dictionary ref 007 Dictionary ref 008 Dictionary ref 009
Dictionary refAttributes 002 Dictionary refValues 002 Dictionary remove 002 Dictionary resize 002
Dictionary send 004 Dictionary setAttributes 002 Dictionary setCdr 001 Dictionary setCdr 002
Dictionary setq 007 Dictionary setq 008 Dictionary setq 009 Dictionary sizeof 004
Dictionary sort 003 Dictionary sort 004 Dictionary sort 005 Dictionary type 007
Directory addMethod 006 Directory defMethod 007 Directory delete 006 Directory insert 003
Directory inside 003 Directory isBound 003 Directory isDirectory 001 Directory isInside 003
Directory isMember 003 Directory member 002 Directory methodsOf 008 Directory new 005
Directory new 006 Directory ref 010 Directory ref 011 Directory ref 012
Directory refAttributes 003 Directory refValues 003 Directory remove 003 Directory send 005
Directory setAttributes 003 Directory setq 010 Directory setq 011 Directory sort 008
Directory sort 009 FltVector addMethod 019 FltVector defmethod 017 FltVector delete 009
FltVector insert 005 FltVector methodsOf 017 FltVector send 015 Function addMethod 017
Function addMethod 018 Function defmethod 016 Function methodsOf 016 Function send 014
IntVector addMethod 020 IntVector defmethod 018 IntVector delete 010 IntVector insert 006
IntVector methodsOf 018 IntVector send 016 List addMethod 025 List defmethod 022
List methodsOf 022 List send 020 Matrix addMethod 008 Matrix defMethod 009
Matrix delete 009 Matrix insert 005 Matrix methodsOf 010 Matrix send 008
NumMatrix addMethod 027 NumMatrix defmethod 024 NumMatrix delete 014 NumMatrix insert 009
NumMatrix methodsOf 024 NumMatrix send 027 NumVector addMethod 021 NumVector defmethod 019
NumVector delete 011 NumVector insert 007 NumVector methodsOf 019 NumVector send 017
Number addMethod 014 Number defmethod 014 Number methodsOf 014 Number send 012
ObjVector addMethod 022 ObjVector delete 012 ObjVector insert 008 ObjectRepository addMethod 026
ObjectRepository defmethod 023 ObjectRepository delete 013 ObjectRepository methodsOf 023 ObjectRepository send 026
Pair addMethod 024 Pair defmethod 021 Pair methodsOf 021 Pair send 019
PcodeVector methodsOf 020 ShortVector addMethod 021 ShortVector defmethod 019 ShortVector delete 011
ShortVector insert 007 ShortVector methodsOf 019 ShortVector send 017 String addMethod 001
String defMethod 001 String defMethod 002 String isChar 001 String isCharAlphabetic 001
String isCharAlphanumeric 001 String isCharLowercase 001 String isCharName 001 String isCharNumeric 001
String isCharUppercase 001 String isCharWhitespace 001 String isEqual 001 String isEqual 002
String isObject 001 String isString 001 String isText 001 String isType 001
String isType 002 String isType 003 String methodsOf 001 String methodsOf 002
String methodsOf 003 String parse 001 String send 001 String setq 001
String sizeof 001 String string 001 String string 002 String string 003
String type 001 Structure addMethod 003 Structure addMethod 004 Structure binaryInsert 001
Structure binarySearch 001 Structure defmethod 004 Structure defmethod 005 Structure delete 001
Structure delete 002 Structure insert 001 Structure inside 001 Structure isBound 001
Structure isInside 001 Structure isMember 001 Structure member 001 Structure methodsOf 005
Structure new 003 Structure ref 004 Structure ref 006 Structure refAttributes 001
Structure refValues 001 Structure remove 001 Structure send 003 Structure setAttributes 001
Structure setq 003 Structure setq 004 Structure setq 005 Structure setq 006
Structure uniqueInsert 001 Structure uniqueInsert 002 Symbol *< 001 Symbol ++ 001
Symbol +< 001 Symbol -- 001 Symbol -< 001 Symbol /< 001
Symbol addMethod 002 Symbol append 003 Symbol compare 002 Symbol compareEQ 002
Symbol compareGE 002 Symbol compareGT 002 Symbol compareLE 002 Symbol compareLT 002
Symbol compareNE 002 Symbol comparison functions 002 Symbol defMethod 003 Symbol downcase 002
Symbol getGlobalValue 001 Symbol getGlobalValue 002 Symbol getSymbolTable 001 Symbol getSymbolTable 002
Symbol hashString 002 Symbol isCharAlphabetic 002 Symbol isCharAlphanumeric 002 Symbol isCharLowercase 002
Symbol isCharName 002 Symbol isCharNumeric 002 Symbol isCharUppercase 002 Symbol isCharWhitespace 002
Symbol isObject 002 Symbol isSymbol 001 Symbol isType 004 Symbol methodsOf 004
Symbol new 002 Symbol proplist 001 Symbol proprecord 001 Symbol putprop 001
Symbol ref 003 Symbol remProp 001 Symbol send 002 Symbol setq 001
Symbol setq 002 Symbol sizeof 002 Symbol symbol 001 Symbol symbol 002
Symbol type 002 Symbol upcase 004 Vector addMethod 007 Vector defmethod 008
Vector delete 007 Vector delete 008 Vector insert 004 Vector methodsOf 009
Vector send 006 Vector setAttributes 004 Vector setAttributes 005 Void addMethod 009
Void addMethod 010 Void defmethod 010 Void defmethod 011 Void methodsOf 011
Void send 009

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