diff --git a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CIndenterTest.java b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CIndenterTest.java
index 17e3b6e18ac..f66a63dbd13 100644
--- a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CIndenterTest.java
+++ b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CIndenterTest.java
@@ -850,4 +850,70 @@ public class CIndenterTest extends BaseUITestCase {
 	public void testIndentationOfConstructorBodyWithFieldInitializer_Bug298282() throws Exception {
 		assertIndenterResult();
 	}
+
+	//class A {
+	//	enum E1 {
+	//			a=1,
+	//	b=2,
+	//	c=3
+	//	};
+	//	enum E2 {
+	//	x=1,
+	//			y=2,
+	//	z=3
+	//	};
+	//};
+	
+	//class A {
+	//	enum E1 {
+	//		a=1,
+	//		b=2,
+	//		c=3
+	//	};
+	//	enum E2 {
+	//		x=1,
+	//		y=2,
+	//		z=3
+	//	};
+	//};
+	public void testIndentationOfEnumeratorDeclWithInitializer_Bug303175() throws Exception {
+		assertIndenterResult();
+	}
+
+	//void f() {
+	//switch(i) {
+	//case -2:
+	//f();
+	//break;
+	//case -1:
+	//f();
+	//break;
+	//case 0:
+	//f();
+	//break;
+	//case +1:
+	//f();
+	//break;
+	//}
+	//}
+
+	//void f() {
+	//	switch(i) {
+	//	case -2:
+	//		f();
+	//		break;
+	//	case -1:
+	//		f();
+	//		break;
+	//	case 0:
+	//		f();
+	//		break;
+	//	case +1:
+	//		f();
+	//		break;
+	//	}
+	//}
+	public void testIndentationOfCaseWithSignedConstant_Bug304150() throws Exception {
+		assertIndenterResult();
+	}
 }
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CHeuristicScanner.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CHeuristicScanner.java
index 09f80650249..e6d4d18cc92 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CHeuristicScanner.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CHeuristicScanner.java
@@ -60,6 +60,7 @@ public final class CHeuristicScanner implements Symbols {
 	private static final char RANGLE= '>';
 	private static final char DOT= '.';
 	private static final char MINUS= '-';
+	private static final char PLUS= '+';
 	private static final char TILDE= '~';
 
 	/**
@@ -385,6 +386,8 @@ public final class CHeuristicScanner implements Symbols {
 					return TokenARROW;
 				}
 				return TokenMINUS;
+			case PLUS:
+				return TokenPLUS;
 			case TILDE:
 				return TokenTILDE;
 		}
@@ -486,6 +489,8 @@ public final class CHeuristicScanner implements Symbols {
 				return TokenDOT;
 			case MINUS:
 				return TokenMINUS;
+			case PLUS:
+				return TokenPLUS;
 			case TILDE:
 				return TokenTILDE;
 		}
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CIndenter.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CIndenter.java
index d57a5c6de76..46f88bd562d 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CIndenter.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CIndenter.java
@@ -1121,8 +1121,7 @@ public final class CIndenter {
 			}
 			if (fToken == Symbols.TokenCLASS
 					|| fToken == Symbols.TokenSTRUCT
-					|| fToken == Symbols.TokenUNION
-					|| fToken == Symbols.TokenENUM) {
+					|| fToken == Symbols.TokenUNION) {
 				// inside a type declaration?  Only so if not preceded by '(' or ',' as in
 				// a parameter list.  To be safe, only accept ';' or EOF
 				int pos= fPosition;
@@ -1154,6 +1153,9 @@ public final class CIndenter {
 			while (skipQualifiers()) {
 				nextToken();
 			}
+			while (fToken == Symbols.TokenMINUS || fToken == Symbols.TokenPLUS) {
+				nextToken();
+			}
 			if (fToken == Symbols.TokenCASE) {
 				return true;
 			}
@@ -1242,6 +1244,32 @@ public final class CIndenter {
 		return false;
 	}
 
+	/**
+	 * Test whether the left brace at the current position marks an enum decl.
+	 * 
+	 * @return <code>true</code> if this looks like an enum decl.
+	 */
+	private boolean looksLikeEnumDeclaration() {
+		int pos = fPosition;
+		nextToken();
+		switch (fToken) {
+		case Symbols.TokenIDENT:
+			nextToken();
+			while (skipQualifiers()) {
+				nextToken();
+			}
+			switch (fToken) {
+			case Symbols.TokenENUM:
+				fPosition = pos;
+				return true;
+			}
+			break;
+		}
+		fPosition = pos;
+		return false;
+	}
+
+
 	/**
 	 * Test whether the colon at the current position marks an access specifier.
 	 * 
@@ -1294,7 +1322,6 @@ public final class CIndenter {
 					return fPosition;
 
 				case Symbols.TokenCLASS:
-				case Symbols.TokenENUM:
 				case Symbols.TokenSTRUCT:
 				case Symbols.TokenUNION:
 					isTypeBody= true;
@@ -1445,6 +1472,8 @@ public final class CIndenter {
 				continue;
 			case Symbols.TokenDOUBLECOLON:
 			case Symbols.TokenOTHER:
+			case Symbols.TokenMINUS:
+			case Symbols.TokenPLUS:
 				continue;
 				
 			case Symbols.TokenQUESTIONMARK:
@@ -1589,7 +1618,7 @@ public final class CIndenter {
 					int lineOffset= fDocument.getLineOffset(startLine);
 					int bound= Math.min(fDocument.getLength(), startPosition + 1);
 					if ((fToken == Symbols.TokenSEMICOLON || fToken == Symbols.TokenRBRACE ||
-							fToken == Symbols.TokenLBRACE && !looksLikeArrayInitializerIntro()) &&
+							fToken == Symbols.TokenLBRACE && !looksLikeArrayInitializerIntro() && !looksLikeEnumDeclaration()) &&
 							(seenEqual || seenShiftLeft || seenRightParen)) {
 						fIndent = fPrefs.prefContinuationIndent;
 					} else {
@@ -1765,6 +1794,8 @@ public final class CIndenter {
 					fIndent= fPrefs.prefArrayIndent;
 			} else if (isNamespace() || isLinkageSpec()) {
 				fIndent= fPrefs.prefNamespaceBodyIndent;
+			} else if (looksLikeEnumDeclaration()) {
+				fIndent = fPrefs.prefTypeIndent;
 			} else {
 				int typeDeclPos = matchTypeDeclaration();
 				if (typeDeclPos == CHeuristicScanner.NOT_FOUND) {
@@ -1853,6 +1884,7 @@ public final class CIndenter {
 			fPosition= pos;
 			return true;
 		}
+		fPosition= pos;
 		return false;
 	}
 
@@ -1863,18 +1895,19 @@ public final class CIndenter {
 	 * @return <code>true</code> if the next elements look like the start of a namespace declaration.
 	 */
 	private boolean isNamespace() {
+		int pos = fPosition;
+		nextToken();
 		if (fToken == Symbols.TokenNAMESPACE) {
+			fPosition = pos;
 			return true;		// Anonymous namespace
 		} else if (fToken == Symbols.TokenIDENT) {
-			int pos = fPosition;
-			int token = fToken;
 			nextToken();		// Get previous token
 			if (fToken == Symbols.TokenNAMESPACE) {
+				fPosition = pos;
 				return true;	// Named namespace
 			}
-			fToken = token;
-			fPosition = pos;
 		}
+		fPosition = pos;
 		return false;
 	}
 
@@ -1884,9 +1917,13 @@ public final class CIndenter {
 	 * @return <code>true</code> if the next elements look like the start of a linkage spec.
 	 */
 	private boolean isLinkageSpec() {
+		int pos = fPosition;
+		nextToken();
 		if (fToken == Symbols.TokenEXTERN) {
+			fPosition = pos;
 			return true;
 		}
+		fPosition = pos;
 		return false;
 	}
 
@@ -2126,6 +2163,7 @@ public final class CIndenter {
 		case Symbols.TokenGREATERTHAN:
 		case Symbols.TokenLESSTHAN:
 		case Symbols.TokenMINUS:
+		case Symbols.TokenPLUS:
 		case Symbols.TokenSHIFTRIGHT:
 		case Symbols.TokenSHIFTLEFT:
 		case Symbols.TokenDELETE:
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/Symbols.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/Symbols.java
index 2e5b432f436..786d737992f 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/Symbols.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/Symbols.java
@@ -38,6 +38,7 @@ public interface Symbols {
 	int TokenARROW= 19;
 	int TokenDOUBLECOLON= 20;
 	int TokenSHIFTLEFT= 21;
+	int TokenPLUS= 22;
 	int TokenIF= 109;
 	int TokenDO= 1010;
 	int TokenFOR= 1011;