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

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


Source file:
Inheritance diagram for Loyc.Syntax.Lexing.LexerSourceWorkaround< CharSrc >:
Loyc.Syntax.Lexing.BaseLexer< CharSrc > Loyc.Syntax.IIndexToLine Loyc.Syntax.Lexing.LexerSource< 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 charIndex)
 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...
 
 BaseLexer (ICharSource source, string fileName="", int inputPosition=0, bool newSourceFile=true)
 
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 object IndexToPositionObject (int charIndex)
 
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 LogExceptionErrorSink
 Throws LogException when it receives an error. Non-errors are sent to MessageSink.Current. More...
 
static readonly IMessageSink FormatExceptionErrorSink
 
- 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 LogExceptionErrorSink, which throws an exception if an error occurs. More...
 
int LA0 [get]
 
CharSrc CharSource [get]
 
string FileName [get]
 
int InputPosition [get, protected 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...
 
- Properties inherited from Loyc.Syntax.IIndexToLine
string FileName [get]
 Gets the file name used in results returned by IndexToLine(int). 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
lookaheadIndexIndex where the error occurred, relative to the current InputPosition (i.e. InputPosition + lookaheadIndex is the position of the error).
messageAn 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
lookaheadIndexIndex where the error occurred, relative to the current InputPosition (i.e. InputPosition + lookaheadIndex is the position of the error).
formatAn error description with argument placeholders.
argsArguments to insert into the error message.

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