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diff --git a/Master/texmf-dist/source/support/arara/src/main/java/com/github/cereda/arara/utils/DirectiveResolver.java b/Master/texmf-dist/source/support/arara/src/main/java/com/github/cereda/arara/utils/DirectiveResolver.java
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+/**
+ * Arara, the cool TeX automation tool
+ * Copyright (c) 2012 -- 2018, Paulo Roberto Massa Cereda
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the project's author nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+ * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.github.cereda.arara.utils;
+
+import org.yaml.snakeyaml.nodes.Tag;
+import org.yaml.snakeyaml.resolver.Resolver;
+
+/**
+ * This class implements a directive resolver.
+ * @author Paulo Roberto Massa Cereda
+ * @version 4.0
+ * @since 4.0
+ */
+public class DirectiveResolver extends Resolver {
+
+ /**
+ * Adds implicit resolvers to the YAML model. For arara, I disabled
+ * boolean and numeric values to be automatically parsed. They still can
+ * be used through an explicit conversion in the rule context.
+ */
+ @Override
+ protected void addImplicitResolvers() {
+ addImplicitResolver(Tag.MERGE, MERGE, "<");
+ addImplicitResolver(Tag.NULL, NULL, "~nN\0");
+ addImplicitResolver(Tag.NULL, EMPTY, null);
+ }
+
+}