| /******************************************************************************* |
| * Copyright (c) 2017 Nathan Ridge. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| *******************************************************************************/ |
| package org.eclipse.cdt.internal.core.dom.parser.cpp.semantics; |
| |
| import org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory; |
| import org.eclipse.cdt.core.dom.ast.IASTNode; |
| import org.eclipse.cdt.core.dom.ast.IBinding; |
| import org.eclipse.cdt.core.dom.ast.IType; |
| import org.eclipse.cdt.core.dom.ast.IValue; |
| import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTNaryTypeIdExpression.Operator; |
| import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateParameterMap; |
| import org.eclipse.cdt.internal.core.dom.parser.DependentValue; |
| import org.eclipse.cdt.internal.core.dom.parser.ITypeMarshalBuffer; |
| import org.eclipse.cdt.internal.core.dom.parser.ProblemType; |
| import org.eclipse.cdt.internal.core.dom.parser.ValueFactory; |
| import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPBasicType; |
| import org.eclipse.cdt.internal.core.dom.parser.cpp.ICPPEvaluation; |
| import org.eclipse.cdt.internal.core.dom.parser.cpp.InstantiationContext; |
| import org.eclipse.core.runtime.CoreException; |
| |
| /** |
| * Evaluation for a n-ary type-id expression. |
| */ |
| public class EvalNaryTypeId extends CPPDependentEvaluation { |
| private final Operator fOperator; |
| private final IType[] fOperands; |
| |
| private boolean fCheckedValueDependent; |
| private boolean fIsValueDependent; |
| |
| public EvalNaryTypeId(Operator operator, IType[] operands, IASTNode pointOfDefinition) { |
| this(operator, operands, findEnclosingTemplate(pointOfDefinition)); |
| } |
| |
| public EvalNaryTypeId(Operator operator, IType[] operands, IBinding templateDefinition) { |
| super(templateDefinition); |
| fOperator = operator; |
| fOperands = operands; |
| } |
| |
| public Operator getOperator() { |
| return fOperator; |
| } |
| |
| public IType[] getOperands() { |
| return fOperands; |
| } |
| |
| @Override |
| public boolean isInitializerList() { |
| return false; |
| } |
| |
| @Override |
| public boolean isFunctionSet() { |
| return false; |
| } |
| |
| @Override |
| public boolean isTypeDependent() { |
| return false; |
| } |
| |
| @Override |
| public boolean isValueDependent() { |
| if (!fCheckedValueDependent) { |
| for (IType operand : fOperands) { |
| if (CPPTemplates.isDependentType(operand)) { |
| fIsValueDependent = true; |
| } |
| } |
| fCheckedValueDependent = true; |
| } |
| return fIsValueDependent; |
| } |
| |
| @Override |
| public boolean isConstantExpression() { |
| return true; |
| } |
| |
| @Override |
| public IType getType() { |
| switch (fOperator) { |
| case __is_trivially_constructible: |
| case __is_constructible: |
| return CPPBasicType.BOOLEAN; |
| } |
| return ProblemType.UNKNOWN_FOR_EXPRESSION; |
| } |
| |
| @Override |
| public IValue getValue() { |
| if (isValueDependent()) { |
| return DependentValue.create(this); |
| } |
| |
| return ValueFactory.evaluateNaryTypeIdExpression(fOperator, fOperands, getTemplateDefinition()); |
| } |
| |
| @Override |
| public ValueCategory getValueCategory() { |
| return ValueCategory.PRVALUE; |
| } |
| |
| @Override |
| public ICPPEvaluation instantiate(InstantiationContext context, int maxDepth) { |
| IType[] operands = CPPTemplates.instantiateTypes(fOperands, context); |
| if (operands == fOperands) { |
| return this; |
| } |
| return new EvalNaryTypeId(fOperator, operands, getTemplateDefinition()); |
| } |
| |
| @Override |
| public ICPPEvaluation computeForFunctionCall(ActivationRecord record, |
| ConstexprEvaluationContext context) { |
| return this; |
| } |
| |
| @Override |
| public int determinePackSize(ICPPTemplateParameterMap tpMap) { |
| int result = 0; |
| for (int i = 0; i < fOperands.length; i++) { |
| result = CPPTemplates.combinePackSize(result, |
| CPPTemplates.determinePackSize(fOperands[i], tpMap)); |
| } |
| return result; |
| } |
| |
| @Override |
| public boolean referencesTemplateParameter() { |
| return isValueDependent(); |
| } |
| |
| @Override |
| public void marshal(ITypeMarshalBuffer buffer, boolean includeValue) throws CoreException { |
| buffer.putShort(ITypeMarshalBuffer.EVAL_NARY_TYPE_ID); |
| buffer.putByte((byte) fOperator.ordinal()); |
| buffer.putInt(fOperands.length); |
| for (IType operand : fOperands) { |
| buffer.marshalType(operand); |
| } |
| marshalTemplateDefinition(buffer); |
| } |
| |
| public static ICPPEvaluation unmarshal(short firstBytes, ITypeMarshalBuffer buffer) throws CoreException { |
| int op = buffer.getByte(); |
| int len = buffer.getInt(); |
| IType[] operands = new IType[len]; |
| for (int i = 0; i < len; i++) { |
| operands[i] = buffer.unmarshalType(); |
| } |
| IBinding templateDefinition = buffer.unmarshalBinding(); |
| return new EvalNaryTypeId(Operator.values()[op], operands, templateDefinition); |
| } |
| } |