org.jruby.lexer.yacc

Class InputStreamLexerSource

java.lang.Object

org.jruby.lexer.yacc.LexerSource

org.jruby.lexer.yacc.InputStreamLexerSource

public class InputStreamLexerSource
extends LexerSource

Field Summary

Fields

Modifier and Type	Field and Description
static int	DATA_READ_BUFFER_SIZE

Fields inherited from class org.jruby.lexer.yacc.LexerSource

line, lineOffset, offset

Constructor Summary

Constructors

Constructor and Description
InputStreamLexerSource(String sourceName, InputStream in, List<String> list, int line, boolean extraPositionInformation) Create our food-source for the lexer

Method Summary

Methods

Modifier and Type	Method and Description
InputStream	getRemainingAsStream()
boolean	lastWasBeginOfLine()
boolean	matchMarker(org.jruby.util.ByteList match, boolean indent, boolean checkNewline) Match marker against input consumering lexer source as it goes...Unless it does not match then it reverts lexer source back to point when this method was invoked.
boolean	peek(int to) Is the next character equal to 'to'
int	read() Read next character from this source
org.jruby.util.ByteList	readLineBytes()
org.jruby.util.ByteList	readUntil(char marker)
int	skipUntil(int marker)
String	toString()
void	unread(int c) Pushes char back onto this source.
void	unreadMany(CharSequence buffer)
boolean	wasBeginOfLine() Was the last character read from the stream the first character on a line

Methods inherited from class org.jruby.lexer.yacc.LexerSource

captureFeature, getCurrentLine, getFilename, getLine, getOffset, getPosition, getPosition, getSource, getSource, getVirtualLine, makePointer, readCodepoint, uncaptureFeature

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DATA_READ_BUFFER_SIZE

public static final int DATA_READ_BUFFER_SIZE

See Also:

Constant Field Values

Constructor Detail

InputStreamLexerSource

public InputStreamLexerSource(String sourceName,
                      InputStream in,
                      List<String> list,
                      int line,
                      boolean extraPositionInformation)

Create our food-source for the lexer

Parameters:

sourceName - is the file we are reading

reader - is what represents the contents of file sourceName

line - starting line number for source (used by eval)

extraPositionInformation - will gives us extra information that an IDE may want

Method Detail

read

public int read()
         throws IOException

Read next character from this source

Specified by:

read in class LexerSource

Returns:

next character to viewed by the source

Throws:

IOException

unread

public void unread(int c)

Pushes char back onto this source. Note, this also allows us to push whatever is passes back into the source.

Specified by:

unread in class LexerSource

Parameters:

to - be put back onto the source

peek

public boolean peek(int to)
             throws IOException

Is the next character equal to 'to'

Specified by:

peek in class LexerSource

Parameters:

to - character to compare against

Returns:

true if the same

Throws:

IOException

readLineBytes

public org.jruby.util.ByteList readLineBytes()
                                      throws IOException

Specified by:

readLineBytes in class LexerSource

Throws:

IOException

skipUntil

public int skipUntil(int marker)
              throws IOException

Specified by:

skipUntil in class LexerSource

Throws:

IOException

unreadMany

public void unreadMany(CharSequence buffer)

Specified by:

unreadMany in class LexerSource

matchMarker

public boolean matchMarker(org.jruby.util.ByteList match,
                  boolean indent,
                  boolean checkNewline)
                    throws IOException

Description copied from class: LexerSource

Match marker against input consumering lexer source as it goes...Unless it does not match then it reverts lexer source back to point when this method was invoked.

Specified by:

matchMarker in class LexerSource

Parameters:

match - to match against

indent - eat any leading whitespace

checkNewline - includes a check that marker is followed by newline or EOF

Returns:

true if marker matches...false otherwise

Throws:

IOException - if an error occurred reading from underlying IO source

wasBeginOfLine

public boolean wasBeginOfLine()

Was the last character read from the stream the first character on a line

Specified by:

wasBeginOfLine in class LexerSource

Returns:

true if so

lastWasBeginOfLine

public boolean lastWasBeginOfLine()

Specified by:

lastWasBeginOfLine in class LexerSource

toString

public String toString()

Overrides:

toString in class Object

readUntil

public org.jruby.util.ByteList readUntil(char marker)
                                  throws IOException

Specified by:

readUntil in class LexerSource

Throws:

IOException

getRemainingAsStream

public InputStream getRemainingAsStream()
                                 throws IOException

Specified by:

getRemainingAsStream in class LexerSource

Throws:

IOException