C# Class CK.Core.StringMatcher

This class supports "Match and Forward" pattern. On a failed match, the SetError method sets the ErrorMessage. On a successful match, the StartIndex is updated by a call to Forward so that the Head is positioned after the match (and any existing error is cleared).

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Public Properties

Property	Type	Description
RegexDouble	System.Text.RegularExpressions.Regex

Public Methods

Method	Description
BackwardSetError ( int savedStartIndex, object expectedMessage = null, [ callerName = null ) : bool	Moves back the head at a previously index and sets an error. The message starts with the caller's method name.
Forward ( int charCount ) : bool	Increments the StartIndex (and decrements Length) with the specified character count and clears any existing error.
MatchChar ( char c ) : bool	Matches an exact single character. If match fails, SetError is called.
MatchWhiteSpaces ( int minCount = 1 ) : bool	Matches a sequence of white spaces.
SetError ( object expectedMessage = null, [ callerName = null ) : bool	Sets an error. The message starts with the caller's method name.
SetSuccess ( ) : bool	Clears any error and returns true.
StringMatcher ( string text, int startIndex ) : System	Initializes a new instance of the StringMatcher class.
StringMatcher ( string text, int startIndex, int length ) : System	Initializes a new instance of the StringMatcher class on a substring.
ToString ( ) : string	Overridden to return a detailed string with ErrorMessage (if any), the Head character, StartIndex position and whole Text.
TryMatchChar ( char c ) : bool	Attempts to match an exact single character.
TryMatchDoubleValue ( ) : bool	Matches a double without getting its value nor setting an error if match fails. This uses RegexDouble.
TryMatchJSONQuotedString ( bool allowNull = false ) : bool	Matches a quoted string without extracting its content.
TryMatchJSONQuotedString ( string &content, bool allowNull = false ) : bool	Matches a quoted string without setting an error if match fails.
TryMatchText ( string s, System.StringComparison comparisonType = StringComparison.OrdinalIgnoreCase ) : bool	Matches a string without setting an error if match fails.
UncheckedMove ( int delta ) : bool	Moves the head without any check and returns always true: typically called by successful TryMatch methods.

Private Methods

Method	Description
FormatMessage ( object expectedMessage, string callerName ) : string
ReadHexDigit ( char c ) : int

Method Details

BackwardSetError() public method

Moves back the head at a previously index and sets an error. The message starts with the caller's method name.

public BackwardSetError ( int savedStartIndex, object expectedMessage = null, [ callerName = null ) : bool
savedStartIndex	int	Index to reset.
expectedMessage	object	/// Optional object. Its will be used to generate an "expected '...'" message. ///
callerName	[	Name of the caller (automatically injected by the compiler).
return	bool

Forward() public method

Increments the StartIndex (and decrements Length) with the specified character count and clears any existing error.

public Forward ( int charCount ) : bool
charCount	int	The successfully matched character count. /// Must be positive and should not move head past the end of the substring.
return	bool

MatchChar() public method

Matches an exact single character. If match fails, SetError is called.

public MatchChar ( char c ) : bool
c	char	The character that must match.
return	bool

MatchWhiteSpaces() public method

Matches a sequence of white spaces.

public MatchWhiteSpaces ( int minCount = 1 ) : bool
minCount	int	Minimal number of white spaces to match.
return	bool

SetError() public method

Sets an error. The message starts with the caller's method name.

public SetError ( object expectedMessage = null, [ callerName = null ) : bool
expectedMessage	object	/// Optional object. Its will be used to generate an "expected '...'" message. ///
callerName	[	Name of the caller (automatically injected by the compiler).
return	bool

SetSuccess() public method

Clears any error and returns true.

public SetSuccess ( ) : bool
return	bool

StringMatcher() public method

Initializes a new instance of the StringMatcher class.

public StringMatcher ( string text, int startIndex ) : System
text	string	The string to parse.
startIndex	int	Index where the match must start in .
return	System

StringMatcher() public method

Initializes a new instance of the StringMatcher class on a substring.

public StringMatcher ( string text, int startIndex, int length ) : System
text	string	The string to parse.
startIndex	int	/// Index where the match must start in . ///
length	int	/// Number of characters to consider in the string. /// If + length is greater than the length of the string, an is thrown. ///
return	System

ToString() public method

Overridden to return a detailed string with ErrorMessage (if any), the Head character, StartIndex position and whole Text.

public ToString ( ) : string
return	string

TryMatchChar() public method

Attempts to match an exact single character.

public TryMatchChar ( char c ) : bool
c	char	The character that must match.
return	bool

TryMatchDoubleValue() public method

Matches a double without getting its value nor setting an error if match fails. This uses RegexDouble.

public TryMatchDoubleValue ( ) : bool
return	bool

TryMatchJSONQuotedString() public method

Matches a quoted string without extracting its content.

public TryMatchJSONQuotedString ( bool allowNull = false ) : bool
allowNull	bool	True to allow 'null'.
return	bool

TryMatchJSONQuotedString() public method

Matches a quoted string without setting an error if match fails.

public TryMatchJSONQuotedString ( string &content, bool allowNull = false ) : bool
content	string	Extracted content.
allowNull	bool	True to allow 'null'.
return	bool

TryMatchText() public method

Matches a string without setting an error if match fails.

public TryMatchText ( string s, System.StringComparison comparisonType = StringComparison.OrdinalIgnoreCase ) : bool
s	string	The string that must match. Can not be null nor empty.
comparisonType	System.StringComparison	Specifies the culture, case, and sort rules.
return	bool

UncheckedMove() public method

Moves the head without any check and returns always true: typically called by successful TryMatch methods.

public UncheckedMove ( int delta ) : bool
delta	int	Number of characters.
return	bool

Property Details

RegexDouble public_oe static_oe property

The Regex that TryMatchDoubleValue() uses to avoid calling double.TryParse(string, out double) when resolving the value is useless.

public static Regex,System.Text.RegularExpressions RegexDouble
return	System.Text.RegularExpressions.Regex