Example Function addMethod 018

 

 

Description

This example defines a method named evalFun that is invoked when the Number 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. In this example, the {proc} argument is coded inline using a lambda statement.

 

Details

First Define the evalFun method:

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

This syntax of the addMethod statement will install the eval message and the corresponding Lambda defined by the lambda expression to the Function Methods Dictionary. If a eval message is sent to the Function native type, the Lambda created by the lambda expression is invoked to evaluate the function after coercing 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 addMethod function, you can use the method name to access the dictionary entry by

#<Dictionary 123456>[methodName:] or

To determine the number of assigned methods:

(length (methodsOf Date: ))

To access the nth method name:

(methodsOf Function: )[n 0]

 

Related Examples

Here are examples of the addMethod function at work.

BitVector addMethod 023 Boolean addMethod 011 Boolean addMethod 012 Boolean send 010
Brick addMethod 008 Brick send 027 Character addMethod 013 CpxVector addMethod 028
Date addMethod 015 Date addMethod 016 Dictionary addMethod 005 Directory addMethod 006
FltVector addMethod 019 Function addMethod 017 Function addMethod 018 IntVector addMethod 020
List addMethod 025 List send 020 Matrix addMethod 008 NumMatrix addMethod 027
NumMatrix defmethod 024 NumVector addMethod 021 Number addMethod 014 ObjVector addMethod 022
ObjectRepository addMethod 026 ObjectRepository send 026 Pair addMethod 024 ShortVector addMethod 021
String addMethod 001 Structure addMethod 003 Structure addMethod 004 Symbol addMethod 002
Vector addMethod 007 Void addMethod 009 Void addMethod 010 Void defmethod 010

 

Function Links

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

addMethod

Here are a number of links to other related functions.

defmethod(Function) send(Function) methodsOf(Function)

 

Argument Types

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

Function 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 compare 013 Function compareEQ 013 Function compareGE 013
Function compareGT 013 Function compareLE 013 Function compareLT 013 Function compareNE 013
Function comparison functions 012 Function defmethod 016 Function isEqual 012 Function isIdentical 011
Function methodsOf 016 Function send 014 Function type 015 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 quote 001 List quote 002 List quote 003 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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