| java.lang.Object
 java.io.Reader
gnu.text.Lexer
All known Subclasses: gnu.kawa.xslt.XslTranslator, gnu.xquery.lang.XQParser, gnu.kawa.lispexpr.LispReader, gnu.ecmascript.Lexer,
| Lexer | | public class Lexer extends Reader (Code) | | Framework for implementing lexical scanners and parsers.
author:
Per Bothner |
| Method Summary | |
| public boolean | checkErrors(PrintWriter out, int max)
Returns true if any error were seen. | | public boolean | checkNext(char ch)
Check if the next character matches a given character.
Parameters:
ch - The character to match against. | | public void | clearErrors()
| | public void | close()
| | public void | eofError(String msg)
| | public void | eofError(String message, int startLine, int startColumn)
| | public void | error(char severity, String filename, int line, int column, String message)
| | public void | error(char severity, String message)
| | public void | error(String message)
| | public void | fatal(String message)
| | public int | getColumnNumber()
| | public SourceError | getErrors()
| | public int | getLineNumber()
| | public SourceMessages | getMessages()
| | public String | getName()
| | final public LineBufferedReader | getPort()
| | public boolean | isInteractive()
| | public void | mark()
Start tentative parsing. | | public int | peek()
| | public void | popNesting(char save)
| | public char | pushNesting(char promptChar)
Enter a nested expression.
This is used in interactive mode to control whether to continue
past end of line, depending on whether the expression is incomplete.
Parameters:
promptChar - Used in prompt string to indicate type of nesting. | | public int | read()
| | public int | read(char[] buf, int offset, int length)
| | public static long | readDigitsInBuffer(LineBufferedReader port, int radix)
| | public int | readOptionalExponent()
Read an optional signed integer. | | public void | reset()
Stop tentative parsing. | | public boolean | seenErrors()
| | public void | setInteractive(boolean v)
| | public void | setMessages(SourceMessages messages)
| | public void | skip()
| | protected void | skip_quick()
| | public void | tokenBufferAppend(int ch)
Append one character to tokenBuffer, resizing it if need be. | | public void | unread(int ch)
| | protected void | unread()
| | protected void | unread_quick()
|
| interactive | | protected boolean interactive(Code) | | |
| nesting | | protected int nesting(Code) | | |
| tokenBuffer | | public char[] tokenBuffer(Code) | | For building tokens of various kinds.
|
| tokenBufferLength | | public int tokenBufferLength(Code) | | The number of chars of tokenBuffer that are used.
|
| checkErrors | | public boolean checkErrors(PrintWriter out, int max)(Code) | | Returns true if any error were seen. Prints and clears the errors.
Parameters:
out - where to write the error message to
Parameters:
max - maximum number of messages to print (can be 0) |
| checkNext | | public boolean checkNext(char ch) throws java.io.IOException(Code) | | Check if the next character matches a given character.
Parameters:
ch - The character to match against. if the character read matchesOn a match, the position is advanced following that character. |
| clearErrors | | public void clearErrors()(Code) | | |
| error | | public void error(char severity, String filename, int line, int column, String message)(Code) | | |
| getColumnNumber | | public int getColumnNumber()(Code) | | |
| getLineNumber | | public int getLineNumber()(Code) | | |
| isInteractive | | public boolean isInteractive()(Code) | | |
| popNesting | | public void popNesting(char save)(Code) | | Exit a nested expression, reversing pushNesting
Parameters:
save - Saved values return by prior pushNesting |
| pushNesting | | public char pushNesting(char promptChar)(Code) | | Enter a nested expression.
This is used in interactive mode to control whether to continue
past end of line, depending on whether the expression is incomplete.
Parameters:
promptChar - Used in prompt string to indicate type of nesting. The previous value of promptChar, to be passed to popNesting. |
| readDigitsInBuffer | | public static long readDigitsInBuffer(LineBufferedReader port, int radix)(Code) | | Read digits, up to the first non-digit or the buffer limit
the digits seen as a non-negative long, or -1 on overflow |
| readOptionalExponent | | public int readOptionalExponent() throws java.io.IOException(Code) | | Read an optional signed integer.
If there is no integer in the input stream, return 1.
For excessively large exponents, return Integer.MIN_VALUE
or Integer.MAX_VALUE.
|
| seenErrors | | public boolean seenErrors()(Code) | | |
| setInteractive | | public void setInteractive(boolean v)(Code) | | |
| tokenBufferAppend | | public void tokenBufferAppend(int ch)(Code) | | Append one character to tokenBuffer, resizing it if need be.
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