Bug 33629 Double-quote as character value broken in RC1
There is a series of related bugs under the category of it's really hard to enter a character value containing a double-quote character and when you try it strange things can happen. 1. Single-quote balancing seems not to work at all. When you type a single quote you get a single quote. 2. When you type the character sequence '" the result is '"" (!) 3. When you try to backspace over the extra unwanted " (either the first or the second) both are erased. The only way to get the desired result seems to be to copy and paste the " character. 4. If you try to cut and paste in the ", you can get in some weird mode where the editor thinks a string exists where there is none. I'm still trying to figure out the sequence that produced the following lines: if (c == ''' || c == '"') {" + "} (Leading tabs removed for sake of example.) I only know that the last two " characters were not typed. No doubt another illustration why editor modes are a bad idea.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/FastJavaPartitionScanner.java
}
	private final IToken preFix(int state, int newState, int last, int prefixLength) {
		
		if (fgEmulate && state == JAVA && (fTokenLength - getLastLength(fLast) > 0)) {
			fTokenLength -= getLastLength(fLast);
			fJavaOffset= fTokenOffset;
			fJavaLength= fTokenLength;
			fTokenLength= 1;
			fState= newState;
			fPrefixLength= prefixLength;
			fLast= last;
			return fTokens[state];
		} else {
			fTokenLength -= getLastLength(fLast);
			fLast= last;
			fPrefixLength= prefixLength;
			IToken token= fTokens[state];		
			fState= newState;
			return token;
		}
	}
	private static int getState(String contentType) {
		if (contentType == null)
			return JAVA;
		else if (contentType.equals(JAVA_SINGLE_LINE_COMMENT))
			return SINGLE_LINE_COMMENT;
		else if (contentType.equals(JAVA_MULTI_LINE_COMMENT))
			return MULTI_LINE_COMMENT;
		else if (contentType.equals(JAVA_DOC))
			return JAVADOC;