| java.lang.Object
 org.jruby.lexer.yacc.LexerSource
| LexerSource | | public class LexerSource (Code) | | This class is what feeds the lexer. It is primarily a wrapper around a
Reader that can unread() data back onto the source. Originally, I thought
about using the PushBackReader to handle read/unread, but I realized that
some extremely pathological case could overflow the pushback buffer. Better
safe than sorry. I could have combined this implementation with a
PushbackBuffer, but the added complexity did not seem worth it.
author:
enebo |
| Constructor Summary | |
| public | LexerSource(String sourceName, Reader reader, int line, boolean extraPositionInformation)
|
| LexerSource | | public LexerSource(String sourceName, Reader reader, int line, boolean extraPositionInformation)(Code) | | Create our food-source for the lexer
Parameters:
sourceName - is the file we are reading
Parameters:
reader - is what represents the contents of file sourceName
Parameters:
line - starting line number for source (used by eval)
Parameters:
extraPositionInformation - will gives us extra information that an IDE may want |
| chompReadAhead | | public int chompReadAhead()(Code) | | |
| getCharAt | | public char getCharAt(int anOffset) throws IOException(Code) | | Get character ahead of current position by offset positions.
Parameters:
anOffset - is location past current position to get char at character index positions ahead of source location or EOF |
| getFilename | | public String getFilename()(Code) | | What file are we lexing?
the files name |
| getLine | | public int getLine()(Code) | | What line are we at?
the line number 0...line_size-1 |
| getOffset | | public int getOffset()(Code) | | The location of the last byte we read from the source.
current location of source |
| getPosition | | public ISourcePosition getPosition(ISourcePosition startPosition, boolean inclusive)(Code) | | Where is the reader within the source {filename,row}
the current position |
| getPosition | | public ISourcePosition getPosition()(Code) | | Where is the reader within the source {filename,row}
the current position |
| getPositionFactory | | public ISourcePositionFactory getPositionFactory()(Code) | | |
| getSource | | public static LexerSource getSource(String name, Reader content, int line, boolean extraPositionInformation)(Code) | | Create a source.
Parameters:
name - the name of the source (e.g a filename: foo.rb)
Parameters:
content - the data of the source the new source |
| isANewLine | | public boolean isANewLine()(Code) | | |
| read | | public char read() throws IOException(Code) | | Read next character from this source
next character to viewed by the source |
| setIsANewLine | | public void setIsANewLine(boolean nextCharIsOnANewLine)(Code) | | |
| setOffset | | public void setOffset(int offset)(Code) | | |
| unread | | public void unread(char c)(Code) | | Pushes char back onto this source. Note, this also
allows us to push whatever is passes back into the source.
Parameters:
c - to be put back onto the source |
| wasBeginOfLine | | public boolean wasBeginOfLine()(Code) | | |
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