CPNumberRecogniser Class Reference
| Inherits from | NSObject |
| Conforms to | CPTokenRecogniser |
| Declared in | CPNumberRecogniser.h CPNumberRecogniser.m |
Overview
The CPNumberRecogniser class attempts to recognise integers and floating point numbers in the input string.
Number recognisers can be set up to recognise only integers, only floating point numbers, or both.
This recogniser produces CPNumberTokens.
Tasks
Creating and Initialising a Number Recogniser
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+ integerRecogniserCreates a number recogniser that recognises only integers.
-
+ floatRecogniserCreates a number recogniser that recognises only floating point numbers.
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+ numberRecogniserCreates a number recogniser that recognises both integers and floating point numbers.
Configuring a Number Recogniser
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recognisesIntsSpecifies whether the recogniser should recognise integers.
property -
recognisesFloatsSpecifies whether the recogniser should recognise floating point numbers.
property
Other Methods
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– recogniseTokenInString:currentTokenPosition:Attempts to recognise a token at tokenPosition in tokenString.
Properties
recognisesFloats
Specifies whether the recogniser should recognise floating point numbers.
@property (readwrite, assign) BOOL recognisesFloatsDiscussion
Specifies whether the recogniser should recognise floating point numbers.
See Also
Declared In
CPNumberRecogniser.hClass Methods
floatRecogniser
Creates a number recogniser that recognises only floating point numbers.
+ (id)floatRecogniserReturn Value
Returns a CPNumberRecogniser that recognises only floating point numbers.
Discussion
Creates a number recogniser that recognises only floating point numbers.
See Also
Declared In
CPNumberRecogniser.hintegerRecogniser
Creates a number recogniser that recognises only integers.
+ (id)integerRecogniserReturn Value
Returns a CPNumberRecogniser that recognises only integers.
Discussion
Creates a number recogniser that recognises only integers.
See Also
Declared In
CPNumberRecogniser.hnumberRecogniser
Creates a number recogniser that recognises both integers and floating point numbers.
+ (id)numberRecogniserReturn Value
Returns a CPNumberRecogniser that recognises both integers and floating point numbers.
Discussion
Creates a number recogniser that recognises both integers and floating point numbers.
See Also
Declared In
CPNumberRecogniser.hInstance Methods
recogniseTokenInString:currentTokenPosition:
Attempts to recognise a token at tokenPosition in tokenString.
- (CPToken *)recogniseTokenInString:(NSString *)tokenString currentTokenPosition:(NSUInteger *)tokenPositionParameters
- tokenString
The string in which to recognise tokens.
- tokenPosition
The position at which to try to find the token. On output, the position after the recognised token.
Return Value
Returns the token recognised.
Discussion
Attempts to recognise a token at tokenPosition in tokenString.
If a token is successfully recognised, it should be returned, and tokenPosition advanced to after the consumed characters.
If no valid token is found nil must be returned instead, and tokenPosition left unchanged.
Declared In
CPTokenRecogniser.h