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GLSL Preprocessing with the C Preprocessor in Java - based on JCPP

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/*
 * Anarres C Preprocessor
 * Copyright (c) 2007-2015, Shevek
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * Modified by the contributors of glsl-preprocessor.
 */
package io.github.douira.glsl_preprocessor;

/**
 * Features of the Preprocessor, which may be enabled or disabled.
 */
public enum Feature {
	/** Supports ANSI digraphs. */
	DIGRAPHS,

	/** Supports ANSI trigraphs. */
	TRIGRAPHS,

	/** Outputs linemarker tokens. */
	LINEMARKERS,

	/** Reports tokens of type INVALID as errors. */
	CSYNTAX,

	/** Preserves comments in the lexed output. Like cpp -C */
	KEEPCOMMENTS,

	/** Preserves comments in the lexed output, even when inactive. */
	KEEPALLCOMMENTS,

	/** enable debug messages */
	DEBUG,

	INCLUDENEXT,

	/** ?? */
	PRAGMA_ONCE,

	/** GLSL support */
	GLSL_PASSTHROUGH,
	GLSL_CUSTOM_PASSTHROUGH,
	/** arbitrary pragmas */
	ARBITRARY_PRAGMAS,
	/** #custom directive */
	CUSTOM_DIRECTIVE,
}