org.fife.ui.rsyntaxtextarea.modes.RubyTokenMaker.flex Maven / Gradle / Ivy
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/* * 09/11/2008 * * RubyTokenMaker.java - Scanner for Ruby * * This library is distributed under a modified BSD license. See the included * RSyntaxTextArea.License.txt file for details. */ package org.fife.ui.rsyntaxtextarea.modes; import java.io.*; import javax.swing.text.Segment; import org.fife.ui.rsyntaxtextarea.*; /** * Scanner for Ruby.file will contain two * definitions of both* * This implementation was created using * JFlex 1.4.1; however, the generated file * was modified for performance. Memory allocation needs to be almost * completely removed to be competitive with the handwritten lexers (subclasses * of
AbstractTokenMaker, so this class has been modified so that * Strings are never allocated (via yytext()), and the scanner never has to * worry about refilling its buffer (needlessly copying chars around). * We can achieve this because RText always scans exactly 1 line of tokens at a * time, and hands the scanner this line as an array of characters (a Segment * really). Since tokens contain pointers to char arrays instead of Strings * holding their contents, there is no need for allocating new memory for * Strings.* * The actual algorithm generated for scanning has, of course, not been * modified.
* * If you wish to regenerate this file yourself, keep in mind the following: *
*
- The generated RubyTokenMaker.java
zzRefillandyyreset. * You should hand-delete the second of each definition (the ones * generated by the lexer), as these generated methods modify the input * buffer, which we'll never have to do. *
yylex() on the generated scanner
* directly; rather, you should use getTokenList as you would
* with any other TokenMaker instance.zzMarkedPos.
*
* @param tokenType The token's type.
*/
private void addEndToken(int tokenType) {
addToken(zzMarkedPos,zzMarkedPos, tokenType);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
*/
private void addToken(int tokenType) {
addToken(zzStartRead, zzMarkedPos-1, tokenType);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
*/
private void addToken(int start, int end, int tokenType) {
int so = start + offsetShift;
addToken(zzBuffer, start,end, tokenType, so);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param array The character array.
* @param start The starting offset in the array.
* @param end The ending offset in the array.
* @param tokenType The token's type.
* @param startOffset The offset in the document at which this token
* occurs.
*/
@Override
public void addToken(char[] array, int start, int end, int tokenType, int startOffset) {
super.addToken(array, start,end, tokenType, startOffset);
zzStartRead = zzMarkedPos;
}
/**
* {@inheritDoc}
*/
@Override
public String[] getLineCommentStartAndEnd(int languageIndex) {
return new String[] { "#", null };
}
/**
* Returns whether tokens of the specified type should have "mark
* occurrences" enabled for the current programming language.
*
* @param type The token type.
* @return Whether tokens of this type should have "mark occurrences"
* enabled.
*/
public boolean getMarkOccurrencesOfTokenType(int type) {
return type==Token.IDENTIFIER || type==Token.VARIABLE;
}
/**
* Returns the first token in the linked list of tokens generated
* from text. This method must be implemented by
* subclasses so they can correctly implement syntax highlighting.
*
* @param text The text from which to get tokens.
* @param initialTokenType The token type we should start with.
* @param startOffset The offset into the document at which
* text starts.
* @return The first Token in a linked list representing
* the syntax highlighted text.
*/
public Token getTokenList(Segment text, int initialTokenType, int startOffset) {
resetTokenList();
this.offsetShift = -text.offset + startOffset;
// Start off in the proper state.
int state = Token.NULL;
switch (initialTokenType) {
case Token.COMMENT_DOCUMENTATION:
state = DOCCOMMENT;
start = text.offset;
break;
case Token.LITERAL_STRING_DOUBLE_QUOTE:
state = STRING;
start = text.offset;
break;
case Token.LITERAL_CHAR:
state = CHAR_LITERAL;
start = text.offset;
break;
case Token.LITERAL_BACKQUOTE:
state = BACKTICKS;
start = text.offset;
break;
case INTERNAL_HEREDOC_EOF_UNQUOTED:
state = HEREDOC_EOF_UNQUOTED;
start = text.offset;
break;
case INTERNAL_HEREDOC_EOF_SINGLE_QUOTED:
state = HEREDOC_EOF_SINGLE_QUOTED;
start = text.offset;
break;
case INTERNAL_HEREDOC_EOF_DOUBLE_QUOTED:
state = HEREDOC_EOF_DOUBLE_QUOTED;
start = text.offset;
break;
case INTERNAL_HEREDOC_EOT_UNQUOTED:
state = HEREDOC_EOT_UNQUOTED;
start = text.offset;
break;
case INTERNAL_HEREDOC_EOT_SINGLE_QUOTED:
state = HEREDOC_EOT_SINGLE_QUOTED;
start = text.offset;
break;
case INTERNAL_HEREDOC_EOT_DOUBLE_QUOTED:
state = HEREDOC_EOT_DOUBLE_QUOTED;
start = text.offset;
break;
case INTERNAL_STRING_Q_BANG:
state = STRING_Q_BANG;
start = text.offset;
break;
case INTERNAL_STRING_Q_CURLY_BRACE:
state = STRING_Q_CURLY_BRACE;
start = text.offset;
break;
case INTERNAL_STRING_Q_LT:
state = STRING_Q_LT;
start = text.offset;
break;
case INTERNAL_STRING_Q_PAREN:
state = STRING_Q_PAREN;
start = text.offset;
break;
case INTERNAL_STRING_Q_SLASH:
state = STRING_Q_SLASH;
start = text.offset;
break;
case INTERNAL_STRING_Q_SQUARE_BRACKET:
state = STRING_Q_SQUARE_BRACKET;
start = text.offset;
break;
default:
state = Token.NULL;
}
s = text;
try {
yyreset(zzReader);
yybegin(state);
return yylex();
} catch (IOException ioe) {
ioe.printStackTrace();
return new TokenImpl();
}
}
/**
* Refills the input buffer.
*
* @return true if EOF was reached, otherwise
* false.
* @exception IOException if any I/O-Error occurs.
*/
private boolean zzRefill() throws java.io.IOException {
return zzCurrentPos>=s.offset+s.count;
}
/**
* Resets the scanner to read from a new input stream.
* Does not close the old reader.
*
* All internal variables are reset, the old input stream
* cannot be reused (internal buffer is discarded and lost).
* Lexical state is set to YY_INITIAL.
*
* @param reader the new input stream
*/
public final void yyreset(java.io.Reader reader) throws java.io.IOException {
// 's' has been updated.
zzBuffer = s.array;
/*
* We replaced the line below with the two below it because zzRefill
* no longer "refills" the buffer (since the way we do it, it's always
* "full" the first time through, since it points to the segment's
* array). So, we assign zzEndRead here.
*/
//zzStartRead = zzEndRead = s.offset;
zzStartRead = s.offset;
zzEndRead = zzStartRead + s.count - 1;
zzCurrentPos = zzMarkedPos = zzPushbackPos = s.offset;
zzLexicalState = YYINITIAL;
zzReader = reader;
zzAtBOL = true;
zzAtEOF = false;
}
%}
Letter = [A-Za-z]
NonzeroDigit = [1-9]
Digit = ("0"|{NonzeroDigit})
BinaryDigit = ([01])
HexDigit = ({Digit}|[A-Fa-f])
OctalDigit = ([0-7])
NonSeparator = ([^\t\f\r\n\ \(\)\{\}\[\]\;\,\.\=\>\<\!\~\?\:\+\-\*\/\&\|\^\%\"\'\`]|"#"|"\\")
IdentifierStart = ({Letter}|"_")
IdentifierPart = ({IdentifierStart}|{Digit})
BooleanLiteral = ("true"|"false")
LineTerminator = (\n)
WhiteSpace = ([ \t\f])
LineCommentBegin = "#"
DocCommentBegin = "=begin"
DocCommentEnd = "=end"
DigitOrUnderscore = ({Digit}|[_])
BinaryIntLiteral = ("0b"{BinaryDigit}([01_]*{BinaryDigit})?)
OctalLiteral = ("0"([0-7_]*{OctalDigit})?)
DecimalLiteral1 = ("0d"{Digit}({DigitOrUnderscore}*{Digit})?)
DecimalLiteral2 = ({NonzeroDigit}({DigitOrUnderscore}*{Digit})?)
DecimalLiteral = ({BinaryIntLiteral}|{OctalLiteral}|{DecimalLiteral1}|{DecimalLiteral2})
HexLiteral = ("0x"{HexDigit}([0-9a-zA-Z_]*{HexDigit})?)
FloatLiteral = ({NonzeroDigit}({DigitOrUnderscore}*{Digit})?[Ee]({Digit}({DigitOrUnderscore}*{Digit})?)?)
Separator = ([\(\)\{\}])
Operator1 = ("::"|"."|"["|"]"|"-"|"+"|"!"|"~"|"*"|"/"|"%"|"<<"|">>"|"&"|"|"|"^")
Operator2 = (">"|">="|"<"|"<="|"<=>"|"=="|"==="|"!="|"=~"|"!~"|"&&"|"||")
Operator3 = (".."|"..."|"="|"+="|"-="|"*="|"/="|"%=")
Operator = ({Operator1}|{Operator2}|{Operator3})
Identifier = ({IdentifierStart}{IdentifierPart}*)
Symbol = ([:]{Identifier})
ErrorIdentifier = ({NonSeparator}+)
PreDefinedVariable = ("$"([!@&`\'+0-9~=/\,;.<>_*$?:\"]|"DEBUG"|"FILENAME"|"LOAD_PATH"|"stderr"|"stdin"|"stdout"|"VERBOSE"|([\-][0adFiIlpwv])))
Variable = ({PreDefinedVariable}|([@][@]?|[$]){Identifier})
%state STRING
%state STRING_Q_BANG
%state STRING_Q_CURLY_BRACE
%state STRING_Q_PAREN
%state STRING_Q_SLASH
%state STRING_Q_SQUARE_BRACKET
%state STRING_Q_LT
%state CHAR_LITERAL
%state BACKTICKS
%state HEREDOC_EOF_UNQUOTED
%state HEREDOC_EOF_SINGLE_QUOTED
%state HEREDOC_EOF_DOUBLE_QUOTED
%state HEREDOC_EOT_UNQUOTED
%state HEREDOC_EOT_SINGLE_QUOTED
%state HEREDOC_EOT_DOUBLE_QUOTED
%state DOCCOMMENT
%%