Enum to int conversion. Bug 285368.

3 files changed, 102 insertions, 6 deletions

diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
index 593a7e7d426..6eb4aebb988 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
@@ -7144,7 +7144,7 @@ public class AST2CPPTests extends AST2BaseTest {
 	//		foo(L'a');
 	//	}
 	public void testWideCharacterLiteralTypes_Bug270892() throws Exception {
-		IASTTranslationUnit tu = parse( getAboveComment(), ParserLanguage.CPP ); 
+		IASTTranslationUnit tu = parse(getAboveComment(), ParserLanguage.CPP); 
 		CPPNameCollector col = new CPPNameCollector();
 		tu.accept(col);
 		
@@ -7202,4 +7202,47 @@ public class AST2CPPTests extends AST2BaseTest {
     	parseAndCheckBindings(code, ParserLanguage.CPP);
 	}
 
+	//	class A {
+	//	  friend inline void m(A p) {}
+	//	};
+	//
+	//	void test(A a) {
+	//	  m(a);
+	//	}
+	public void _testInlineFriendFunction_284690() throws Exception {
+		final String code = getAboveComment();
+		parseAndCheckBindings(code, ParserLanguage.CPP);
+	}
+
+	//	void f(int t);
+	//	void f(unsigned int t);
+	//	void f(long t);
+	//
+	//	enum IntEnum { i1 };
+	//	enum UnsignedEnum { u1 = 0x7FFFFFFF, u2 };
+	//	enum LongEnum { l1 = -1, l2 = 0x7FFFFFFF, l3 };
+	//
+	//	void test() {
+	//	  f(i1);
+	//	  f(u1);
+	//	  f(l1);
+	//	}
+	public void testEnumToIntConversion_285368() throws Exception {
+		BindingAssertionHelper ba= new BindingAssertionHelper(getAboveComment(), true);
+    	ICPPFunction f1 = ba.assertNonProblem("f(i1)", 1, ICPPFunction.class);
+    	IType t1 = f1.getType().getParameterTypes()[0];
+    	assertTrue(t1 instanceof ICPPBasicType);
+    	assertEquals(IBasicType.t_int, ((ICPPBasicType) t1).getType());
+    	assertEquals(0, ((ICPPBasicType) t1).getQualifierBits());
+    	ICPPFunction f2 = ba.assertNonProblem("f(u1)", 1, ICPPFunction.class);
+    	IType t2 = f2.getType().getParameterTypes()[0];
+    	assertTrue(t2 instanceof ICPPBasicType);
+    	assertEquals(IBasicType.t_int, ((ICPPBasicType) t2).getType());
+    	assertEquals(ICPPBasicType.IS_UNSIGNED, ((ICPPBasicType) t2).getQualifierBits());
+    	ICPPFunction f3 = ba.assertNonProblem("f(l1)", 1, ICPPFunction.class);
+    	IType t3 = f3.getType().getParameterTypes()[0];
+    	assertTrue(t3 instanceof ICPPBasicType);
+    	assertEquals(IBasicType.t_int, ((ICPPBasicType) t3).getType());
+    	assertEquals(ICPPBasicType.IS_LONG, ((ICPPBasicType) t3).getQualifierBits());
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/ASTEnumerator.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/ASTEnumerator.java
index d774d55cbf3..cd3a25b91ef 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/ASTEnumerator.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/ASTEnumerator.java
@@ -123,7 +123,7 @@ public abstract class ASTEnumerator extends ASTNode implements IASTEnumerator, I
 
 	private void createEnumValues(IASTEnumerationSpecifier parent) {
 		IASTEnumerator[] etors= parent.getEnumerators();
-		int cv= -1;
+		long cv= -1;
 		boolean isknown= true;
 		for (IASTEnumerator etor : etors) {
 			cv++;
@@ -134,7 +134,7 @@ public abstract class ASTEnumerator extends ASTNode implements IASTEnumerator, I
 				isknown= false;
 				if (nv != null) {
 					isknown= true;
-					cv= nv.intValue();
+					cv= nv.longValue();
 				}
 			}
 			if (etor instanceof ASTEnumerator) {
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/Conversions.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/Conversions.java
index c6cdc8ad0b9..bfadd7b1814 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/Conversions.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/Conversions.java
@@ -24,11 +24,13 @@ import org.eclipse.cdt.core.dom.ast.IArrayType;
 import org.eclipse.cdt.core.dom.ast.IBasicType;
 import org.eclipse.cdt.core.dom.ast.IBinding;
 import org.eclipse.cdt.core.dom.ast.IEnumeration;
+import org.eclipse.cdt.core.dom.ast.IEnumerator;
 import org.eclipse.cdt.core.dom.ast.IFunctionType;
 import org.eclipse.cdt.core.dom.ast.IPointerType;
 import org.eclipse.cdt.core.dom.ast.IProblemBinding;
 import org.eclipse.cdt.core.dom.ast.IQualifierType;
 import org.eclipse.cdt.core.dom.ast.IType;
+import org.eclipse.cdt.core.dom.ast.IValue;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPBase;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPBasicType;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
@@ -52,7 +54,9 @@ import org.eclipse.core.runtime.CoreException;
  */
 public class Conversions {
 	enum UDCMode {allowUDC, noUDC, deferUDC}
-
+	private static final int IS_LONG = ICPPBasicType.IS_LONG;
+	private static final int IS_UNSIGNED = ICPPBasicType.IS_UNSIGNED;
+	
 	/**
 	 * Computes the cost of an implicit conversion sequence
 	 * [over.best.ics] 13.3.3.1
@@ -669,7 +673,14 @@ public class Conversions {
 				}
 			} else if (src instanceof IEnumeration) {
 				if (tType == IBasicType.t_int || tType == IBasicType.t_unspecified) {
-					canPromote= true;
+					if (trg instanceof ICPPBasicType) {
+						int qualifiers = getEnumIntType((IEnumeration) src);
+						if (qualifiers == ((ICPPBasicType) trg).getQualifierBits()) {
+							canPromote = true;
+						}
+					} else {
+						canPromote = true;
+					}
 				}
 			}
 		}
@@ -679,7 +690,7 @@ public class Conversions {
 		}
 		return false;
 	}
-	
+
 	/**
 	 * Attempts conversions and returns whether the conversion succeeded.
 	 * [4.7]  Integral conversions
@@ -815,4 +826,46 @@ public class Conversions {
 		
 		return true;
 	}
+
+	/**
+	 * Returns IS_LONG, IS_UNSIGNED qualifiers of the first of the following types that can represent
+	 * all the values of an enumeration: int, unsigned int, long, or unsigned long.
+	 * @param enumeration
+	 * @return qualifiers of the corresponding integer type.
+	 */
+	private static int getEnumIntType(IEnumeration enumeration) {
+		long minValue = 0;
+		long maxValue = 0;
+		try {
+			IEnumerator[] enumerators = enumeration.getEnumerators();
+			for (IEnumerator enumerator : enumerators) {
+				IValue value = enumerator.getValue();
+				if (value != null) {
+					Long val = value.numericalValue();
+					if (val != null) {
+						long v = val.longValue();
+						if (minValue > v) {
+							minValue = v;
+						}
+						if (maxValue < v) {
+							maxValue = v;
+						}
+					}
+				}
+			}
+		} catch (DOMException e) {
+			return 0;
+		}
+		// TODO(sprigogin): Use values of __INT_MAX__ and __LONG_MAX__ macros
+		if (minValue >= Integer.MIN_VALUE && maxValue <= Integer.MAX_VALUE) {
+			return 0;
+		} else if (minValue >= 0 && maxValue <= 0xFFFFFFFFL) {
+			return IS_UNSIGNED;
+		} else if (minValue >= Long.MIN_VALUE && maxValue <= Long.MAX_VALUE) {
+			return IS_LONG;
+		} else {
+			// This branch is unreachable due to limitations of Java long type. 
+			return IS_UNSIGNED | IS_LONG;
+		}
+	}
 }