Loyc.Syntax.Lexing.LexerSourceWorkaround< CharSrc > Class Template Reference

This class only exists to work around a limitation of the C# language: "cannot change access modifiers when overriding 'protected' inherited member Error(...)". More...

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Source file:

• /Core/Loyc.Syntax/Lexing/LexerSource.cs

Inheritance diagram for Loyc.Syntax.Lexing.LexerSourceWorkaround< CharSrc >:

Remarks

This class only exists to work around a limitation of the C# language: "cannot change access modifiers when overriding 'protected' inherited member Error(...)".

Type Constraints

CharSrc

:

ICharSource

Public Member Functions
	LexerSourceWorkaround (CharSrc source, string fileName="", int inputPosition=0, bool newSourceFile=true)
Public Member Functions inherited from Loyc.Syntax.Lexing.BaseLexer< CharSrc >
	BaseLexer (CharSrc chars, string fileName="", int inputPosition=0, bool newSourceFile=true)
	Initializes BaseLexer. More...
virtual void	Reset (CharSrc chars, string fileName="", int inputPosition=0, bool newSourceFile=true)
	Reinitializes the object. This method is called by the constructor. More...
SourcePos	IndexToLine (int index)
	Returns the position in a source file of the specified index. More...

Protected Member Functions
abstract void	Error_Renamed (int lookaheadIndex, string format)
override void	Error (int lookaheadIndex, string format)
	This method is called to handle errors that occur during lexing. More...
abstract void	Error_Renamed (int lookaheadIndex, string format, params object[] args)
override void	Error (int lookaheadIndex, string format, params object[] args)
	This method is called to format and handle errors that occur during lexing. The default implementation sends errors to ErrorSink, which, by default, throws a FormatException. More...
Protected Member Functions inherited from Loyc.Syntax.Lexing.BaseLexer< CharSrc >
void	Reset ()
int	LA (int i)
void	Skip ()
	Increments InputPosition. Called by LLLPG when prediction already verified the input (and caller doesn't save LA(0)) More...
virtual void	AfterNewline ()
	The lexer must call this method exactly once after it advances past each newline, even inside comments and strings. This method keeps the LineNumber and LineStartAt properties updated. More...
void	Newline ()
	Default newline parser that matches ' ' or '' unconditionally. More...
void	Spaces ()
	Skips past any spaces at the current position. Equivalent to rule Spaces @[ (' '|'')* ] in LLLPG. More...
int	MatchAny ()
int	Match (HashSet< int > set)
int	Match (int a)
int	Match (int a, int b)
int	Match (int a, int b, int c)
int	Match (int a, int b, int c, int d)
int	MatchRange (int aLo, int aHi)
int	MatchRange (int aLo, int aHi, int bLo, int bHi)
int	MatchExcept ()
int	MatchExcept (HashSet< int > set)
int	MatchExcept (int a)
int	MatchExcept (int a, int b)
int	MatchExcept (int a, int b, int c)
int	MatchExcept (int a, int b, int c, int d)
int	MatchExceptRange (int aLo, int aHi)
int	MatchExceptRange (int aLo, int aHi, int bLo, int bHi)
bool	TryMatch (HashSet< int > set)
bool	TryMatch (int a)
bool	TryMatch (int a, int b)
bool	TryMatch (int a, int b, int c)
bool	TryMatch (int a, int b, int c, int d)
bool	TryMatchRange (int aLo, int aHi)
bool	TryMatchRange (int aLo, int aHi, int bLo, int bHi)
bool	TryMatchExcept ()
bool	TryMatchExcept (HashSet< int > set)
bool	TryMatchExcept (int a)
bool	TryMatchExcept (int a, int b)
bool	TryMatchExcept (int a, int b, int c)
bool	TryMatchExcept (int a, int b, int c, int d)
bool	TryMatchExceptRange (int aLo, int aHi)
bool	TryMatchExceptRange (int aLo, int aHi, int bLo, int bHi)
virtual void	Check (bool expectation, string expectedDescr="")
virtual void	Error (bool inverted, int range0lo, int range0hi)
virtual void	Error (bool inverted, params int[] ranges)
virtual void	Error (bool inverted, IList< int > ranges)
virtual void	Error (bool inverted, HashSet< int > set)
string	RangesToString (IList< int > ranges)
	Converts a list of character ranges to a string, e.g. for input list {'*','*','a','z'}, the output is "'*' 'a'..'z'". More...
void	PrintChar (int c, StringBuilder sb)
	Prints a character as a string, e.g. 'a' -> "'a'", with the special value -1 representing EOF, so PrintChar(-1, ...) == "EOF". More...

Additional Inherited Members
Public static fields inherited from Loyc.Syntax.Lexing.BaseLexer< CharSrc >
static readonly IMessageSink	FormatExceptionErrorSink
	Throws FormatException when it receives an error. Non-errors are sent to MessageSink.Current. More...
Properties inherited from Loyc.Syntax.Lexing.BaseLexer< CharSrc >
IMessageSink	ErrorSink [get, set]
	Gets or sets the object to which error messages are sent. The default object is FormatExceptionErrorSink, which throws FormatException if an error occurs. More...
int	LA0 [get, set]
CharSrc	CharSource [get]
string	FileName [get]
int	InputPosition [get, set]
LexerSourceFile< CharSrc >	SourceFile [get]
int	LineNumber [get]
	Current line number. Starts at 1 for the first line, unless derived class changes it. More...
int	LineStartAt [get]
	Index at which the current line started. More...
Static Protected Member Functions inherited from Loyc.Syntax.Lexing.BaseLexer< CharSrc >
static HashSet< int >	NewSet (params int[] items)
static HashSet< int >	NewSetOfRanges (params int[] ranges)
Protected fields inherited from Loyc.Syntax.Lexing.BaseLexer< CharSrc >
int	CachedBlockSize = 128
int	_lineStartAt
int	_lineNumber = 1

Member Function Documentation

override void Loyc.Syntax.Lexing.LexerSourceWorkaround< CharSrc >.Error ( int  lookaheadIndex, string  message  )

inlineprotectedvirtual

This method is called to handle errors that occur during lexing.

Parameters

lookaheadIndex	Index where the error occurred, relative to the current InputPosition (i.e. InputPosition + lookaheadIndex is the position of the error).
message	An error message, not including the error location.

Reimplemented from Loyc.Syntax.Lexing.BaseLexer< CharSrc >.

override void Loyc.Syntax.Lexing.LexerSourceWorkaround< CharSrc >.Error ( int  lookaheadIndex, string  format, params object[]  args  )

inlineprotectedvirtual

This method is called to format and handle errors that occur during lexing. The default implementation sends errors to ErrorSink, which, by default, throws a FormatException.

Parameters

lookaheadIndex	Index where the error occurred, relative to the current InputPosition (i.e. InputPosition + lookaheadIndex is the position of the error).
format	An error description with argument placeholders.
args	Arguments to insert into the error message.

Reimplemented from Loyc.Syntax.Lexing.BaseLexer< CharSrc >.