C# Class Crisis.CommandLine.Lexer

Provides tokenization of command lines. Used by the CommandLineParser.

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Private Properties

Property	Type	Description
FillCharacterBuffer	int
GetNextValueToken	ValueToken
IsAssignmentCharacter	bool
IsEscapeCharacter	bool
IsWhiteSpace	bool
LA	int
MatchAssignmentCharacter	Token
MatchEndOption	Token
MatchFileOption	Token
MatchGroupedOptionNames	Token
MatchLongOptionName	Token
MatchLongUnixOption	Token
MatchPlusOption	Token
MatchQuotedValue	Token
MatchShortUnixOption	Token
MatchUnquotedValue	Token
MatchValue	Token
MatchWindowsOption	Token
ReadCharacter	int
ReadPossiblyEscapedCharacter	int
SkipCharacters	bool

Public Methods

Method	Description
GetNextToken ( ) : Token	Gets the next token from the input.
Lexer ( TextReader input, ICollection escapeCharacters, QuotationInfo>.IDictionary quotations, OptionStyles>.IDictionary assignmentCharacters ) : System	Initializes a new instance of the Lexer class.
Lexer ( TextReader input, Lexer parent ) : System

Private Methods

Method	Description
FillCharacterBuffer ( ) : int	Fills up the character buffer with as many character as fits or are available, whichever is the least.
GetNextValueToken ( ) : ValueToken
IsAssignmentCharacter ( int ch ) : bool	Determines whether the specified character is an assignment character for the OptionStyles currently being parsed.
IsEscapeCharacter ( int ch ) : bool	Determines whether the specified character is a character used to escape other characters, such as the backslash '\' in C# strings. The escape character in use is not context sensitive.
IsWhiteSpace ( int ch ) : bool	Determines whether the specified character is a white space character.
LA ( int offset ) : int	Returns the lookahead character for the specified offset. This is the last character that will be read by ReadCharacter if it is called offset number of times.
MatchAssignmentCharacter ( ) : Token	Matches an assignment character within the current context.
MatchEndOption ( ) : Token	Matches the end of options token, represented by a double-dash ('--'). This method does not make the lexer stop parsing options. The calling application needs to set EnabledOptionStyles to OptionStyles.None for that to happen, which can be done in response to this token being returned.
MatchFileOption ( ) : Token
MatchGroupedOptionNames ( ) : Token	Matches one or more options in sequence with a one-character name. This method is called by the other methods that start with "MatchShort". Even though this method only returns the first option read, the mTokenQueue is filled up with the rest of them.
MatchLongOptionName ( ) : Token	Matches a long option name with the current option style.
MatchLongUnixOption ( ) : Token	Matches a long option name with the OptionStyles.LongUnix style. This may be preceeded by either a single ('-') or a double ('--') dash.
MatchPlusOption ( ) : Token	Matches an option name (or names depending on the option styles enabled) preceeded by the '+' sign. This method calls MatchGroupedOptionNames if the OptionStyles.Group style is enabled, otherwise MatchLongOptionName.
MatchQuotedValue ( ) : Token	Matches a quoted value. A quoted value is any string that starts with a quote character
MatchShortUnixOption ( ) : Token	Matches an option name (or names depending on the option styles enabled) preceeded by the '-' sign. This method calls MatchGroupedOptionNames if the OptionStyles.Group style is enabled, otherwise MatchLongOptionName.
MatchUnquotedValue ( ) : Token	Matches an unquoted value. An unquoted value is any string that is terminated by an unescaped white space or the end of input.
MatchValue ( ) : Token	Matches a value. This method determines whether the value to be read is quoted or not and calls the appropriate method to do the parsing.
MatchWindowsOption ( ) : Token	Matches a long option name with the OptionStyles.Windows style. This must be preceeded a single slash ('/').
ReadCharacter ( ) : int	Reads the next character from the input and moves the position of the input stream (or buffer depending on from where the character was read) one step forward.
ReadPossiblyEscapedCharacter ( char currentQuote ) : int	Reads a character from the input stream which may be escaped within the specified context. The context is determined by the currentQuote argument, which indicates the type of quotes that were used for quoting the value currently being parsed. The special value of -1 indicates that no quotes were used. If an escape character is found this method will actually read two characters and convert it to the replacement specified.
SkipCharacters ( int count ) : bool	Skips ahead the specified number of characters in the input stream (or buffer). This has the same effect as calling ReadCharacter count number of times.

Method Details

GetNextToken() public method

Gets the next token from the input.

public GetNextToken ( ) : Token
return	Token

Lexer() public method

Initializes a new instance of the Lexer class.

public Lexer ( TextReader input, ICollection escapeCharacters, QuotationInfo>.IDictionary quotations, OptionStyles>.IDictionary assignmentCharacters ) : System
input	TextReader	The to use for input. This need not be seekable.
escapeCharacters	ICollection	The escape characters that should be recognized.
quotations	QuotationInfo>.IDictionary	The quotations that should be recognized.
assignmentCharacters	OptionStyles>.IDictionary	The assignment characters that should be recognized.
return	System

Lexer() public method

public Lexer ( TextReader input, Lexer parent ) : System
input	TextReader
parent	Lexer
return	System