/*******************************************************************************
 * Copyright (c) 2008, 2015 Wind River Systems, Inc. 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:
 *    Markus Schorn - initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser;

/**
 * Configures the parsing of a declaration in various contexts.
 */
public class DeclarationOptions {
	final public static int ALLOW_EMPTY_SPECIFIER = 0x01;
	final public static int ALLOW_ABSTRACT = 0x02;
	final public static int REQUIRE_ABSTRACT = 0x04;
	final public static int ALLOW_BITFIELD = 0x08;
	final public static int NO_INITIALIZER = 0x10;
	final public static int NO_CTOR_STYLE_INITIALIZER = 0x20;
	final public static int NO_BRACED_INITIALIZER = 0x40;
	final public static int NO_FUNCTIONS = 0x80;
	final public static int NO_ARRAYS = 0x100;
	final public static int NO_NESTED = 0x200;
	final public static int ALLOW_PARAMETER_PACKS = 0x400;
	final public static int REQUIRE_SIMPLE_NAME = 0x800;
	final public static int ALLOW_FOLLOWED_BY_BRACE = 0x1000;
	final public static int ALLOW_OPAQUE_ENUM = 0x2000;
	final public static int SINGLE_DTOR = 0x4000;
	final public static int ALLOW_FUNCTION_DEFINITION = 0x8000;
	final public static int NO_COMPOSITE_SPECIFIER = 0x10000;

	public static final DeclarationOptions GLOBAL = new DeclarationOptions(
			ALLOW_EMPTY_SPECIFIER | ALLOW_OPAQUE_ENUM | ALLOW_FUNCTION_DEFINITION),
			FUNCTION_STYLE_ASM = new DeclarationOptions(
					ALLOW_EMPTY_SPECIFIER | NO_INITIALIZER | ALLOW_ABSTRACT | ALLOW_FUNCTION_DEFINITION),
			C_MEMBER = new DeclarationOptions(ALLOW_BITFIELD | ALLOW_ABSTRACT),
			CPP_MEMBER = new DeclarationOptions(ALLOW_EMPTY_SPECIFIER | ALLOW_BITFIELD | ALLOW_OPAQUE_ENUM
					| NO_CTOR_STYLE_INITIALIZER | ALLOW_FUNCTION_DEFINITION),
			LOCAL = new DeclarationOptions(ALLOW_OPAQUE_ENUM),
			PARAMETER = new DeclarationOptions(ALLOW_ABSTRACT | ALLOW_PARAMETER_PACKS | REQUIRE_SIMPLE_NAME
					| NO_BRACED_INITIALIZER | NO_CTOR_STYLE_INITIALIZER),
			TYPEID = new DeclarationOptions(REQUIRE_ABSTRACT | NO_INITIALIZER),
			TYPEID_TRAILING_RETURN_TYPE = new DeclarationOptions(REQUIRE_ABSTRACT | NO_INITIALIZER
					| ALLOW_FOLLOWED_BY_BRACE | ALLOW_FUNCTION_DEFINITION | NO_COMPOSITE_SPECIFIER),
			TYPEID_NEW = new DeclarationOptions(
					REQUIRE_ABSTRACT | NO_INITIALIZER | NO_FUNCTIONS | NO_NESTED | ALLOW_FOLLOWED_BY_BRACE),
			TYPEID_CONVERSION = new DeclarationOptions(REQUIRE_ABSTRACT | NO_INITIALIZER | NO_FUNCTIONS | NO_NESTED),
			EXCEPTION = new DeclarationOptions(ALLOW_ABSTRACT | NO_INITIALIZER),
			CONDITION = new DeclarationOptions(NO_CTOR_STYLE_INITIALIZER),
			C_PARAMETER_NON_ABSTRACT = new DeclarationOptions(ALLOW_ABSTRACT | ALLOW_EMPTY_SPECIFIER),
			RANGE_BASED_FOR = new DeclarationOptions(NO_INITIALIZER | REQUIRE_SIMPLE_NAME | SINGLE_DTOR);

	final public boolean fAllowEmptySpecifier;
	final public boolean fAllowAbstract;
	final public boolean fRequireAbstract;
	final public boolean fAllowBitField;
	final public boolean fAllowInitializer;
	final public boolean fAllowBracedInitializer;
	final public boolean fCanBeFollowedByBrace;
	final public boolean fAllowCtorStyleInitializer;
	final public boolean fAllowFunctions;
	final public boolean fAllowNested;
	final public boolean fAllowParameterPacks;
	final public boolean fRequireSimpleName;
	final public boolean fAllowOpaqueEnum;
	final public boolean fSingleDtor;
	final public boolean fAllowFunctionDefinition;
	final public boolean fAllowCompositeSpecifier;

	public DeclarationOptions(int options) {
		fAllowEmptySpecifier = (options & ALLOW_EMPTY_SPECIFIER) != 0;
		fRequireAbstract = (options & REQUIRE_ABSTRACT) != 0;
		fAllowAbstract = fRequireAbstract || (options & ALLOW_ABSTRACT) != 0;
		fAllowBitField = (options & ALLOW_BITFIELD) != 0;
		fAllowInitializer = (options & NO_INITIALIZER) == 0;
		fAllowBracedInitializer = fAllowInitializer && (options & NO_BRACED_INITIALIZER) == 0;
		fAllowCtorStyleInitializer = fAllowInitializer && (options & NO_CTOR_STYLE_INITIALIZER) == 0;
		fAllowFunctions = (options & NO_FUNCTIONS) == 0;
		fAllowNested = (options & NO_NESTED) == 0;
		fAllowParameterPacks = (options & ALLOW_PARAMETER_PACKS) != 0;
		fRequireSimpleName = (options & REQUIRE_SIMPLE_NAME) != 0;
		fCanBeFollowedByBrace = fAllowBracedInitializer || (options & ALLOW_FOLLOWED_BY_BRACE) != 0;
		fAllowOpaqueEnum = (options & ALLOW_OPAQUE_ENUM) != 0;
		fSingleDtor = (options & SINGLE_DTOR) != 0;
		fAllowFunctionDefinition = (options & ALLOW_FUNCTION_DEFINITION) != 0;
		fAllowCompositeSpecifier = (options & NO_COMPOSITE_SPECIFIER) == 0;
	}
}
