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/*******************************************************************************
* Copyright (c) 2004, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Andrew Niefer (IBM Corporation) - initial API and implementation
* Markus Schorn (Wind River Systems)
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;
import org.eclipse.cdt.core.dom.ast.ASTTypeUtil;
import org.eclipse.cdt.core.dom.ast.IPointerType;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.ITypedef;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunctionType;
import org.eclipse.cdt.internal.core.dom.parser.ISerializableType;
import org.eclipse.cdt.internal.core.dom.parser.ITypeMarshalBuffer;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil;
import org.eclipse.core.runtime.CoreException;
/**
* Represents c++ function types. Note that we keep typedefs as part of the function type.
* For safe usage in index bindings, all fields need to be final.
*/
public class CPPFunctionType implements ICPPFunctionType, ISerializableType {
private final IType[] parameters;
private final IType returnType;
private final boolean isConst;
private final boolean isVolatile;
private final boolean hasRefQualifier;
private final boolean isRValueReference;
private final boolean takesVarargs;
public CPPFunctionType(IType returnType, IType[] types) {
this(returnType, types, false, false, false, false, false);
}
public CPPFunctionType(IType returnType, IType[] types, boolean isConst, boolean isVolatile,
boolean hasRefQualifier, boolean isRValueReference, boolean takesVarargs) {
this.returnType = returnType;
this.parameters = types;
this.isConst = isConst;
this.isVolatile= isVolatile;
this.hasRefQualifier = hasRefQualifier;
this.isRValueReference = isRValueReference;
this.takesVarargs= takesVarargs;
}
@Override
public boolean isSameType(IType o) {
if (o instanceof ITypedef)
return o.isSameType(this);
if (o instanceof ICPPFunctionType) {
ICPPFunctionType ft = (ICPPFunctionType) o;
if (isConst() != ft.isConst() || isVolatile() != ft.isVolatile()
|| hasRefQualifier() != ft.hasRefQualifier()
|| isRValueReference() != ft.isRValueReference()
|| takesVarArgs() != ft.takesVarArgs()) {
return false;
}
IType[] fps;
fps = ft.getParameterTypes();
// Constructors & destructors have null return type.
if ((returnType == null) ^ (ft.getReturnType() == null))
return false;
if (returnType != null && !returnType.isSameType(ft.getReturnType()))
return false;
if (parameters.length == fps.length) {
for (int i = 0; i < parameters.length; i++) {
if (parameters[i] == null || !parameters[i].isSameType(fps[i]))
return false;
}
} else {
if (!SemanticUtil.isEmptyParameterList(parameters)
|| !SemanticUtil.isEmptyParameterList(fps)) {
return false;
}
}
return true;
}
return false;
}
@Override
public IType getReturnType() {
return returnType;
}
@Override
public IType[] getParameterTypes() {
return parameters;
}
@Override
public Object clone() {
IType t = null;
try {
t = (IType) super.clone();
} catch (CloneNotSupportedException e) {
//not going to happen
}
return t;
}
@Override
@Deprecated
public IPointerType getThisType() {
return null;
}
@Override
public final boolean isConst() {
return isConst;
}
@Override
public final boolean isVolatile() {
return isVolatile;
}
@Override
public boolean hasRefQualifier() {
return hasRefQualifier;
}
@Override
public boolean isRValueReference() {
return isRValueReference;
}
@Override
public boolean takesVarArgs() {
return takesVarargs;
}
@Override
public String toString() {
return ASTTypeUtil.getType(this);
}
@Override
public void marshal(ITypeMarshalBuffer buffer) throws CoreException {
short firstBytes= ITypeMarshalBuffer.FUNCTION_TYPE;
if (isConst) firstBytes |= ITypeMarshalBuffer.FLAG1;
if (takesVarargs) firstBytes |= ITypeMarshalBuffer.FLAG2;
if (isVolatile) firstBytes |= ITypeMarshalBuffer.FLAG3;
if (hasRefQualifier) firstBytes |= ITypeMarshalBuffer.FLAG4;
if (isRValueReference) firstBytes |= ITypeMarshalBuffer.FLAG5;
buffer.putShort(firstBytes);
buffer.putInt(parameters.length);
buffer.marshalType(returnType);
for (int i = 0; i < parameters.length; i++) {
buffer.marshalType(parameters[i]);
}
}
public static IType unmarshal(short firstBytes, ITypeMarshalBuffer buffer) throws CoreException {
int len= buffer.getInt();
IType rt= buffer.unmarshalType();
IType[] pars= new IType[len];
for (int i = 0; i < pars.length; i++) {
pars[i]= buffer.unmarshalType();
}
boolean isConst = (firstBytes & ITypeMarshalBuffer.FLAG1) != 0;
boolean takesVarargs = (firstBytes & ITypeMarshalBuffer.FLAG2) != 0;
boolean isVolatile = (firstBytes & ITypeMarshalBuffer.FLAG3) != 0;
boolean hasRefQualifier = (firstBytes & ITypeMarshalBuffer.FLAG4) != 0;
boolean isRValueReference = (firstBytes & ITypeMarshalBuffer.FLAG5) != 0;
return new CPPFunctionType(rt, pars, isConst, isVolatile, hasRefQualifier, isRValueReference,
takesVarargs);
}
}
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