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Treepat is a language to recognise patterns in trees in a similar way as regular expressions recognize patterns in strings. Treepat includes analogous operators to regex union, concatenation, and closure, which are extended to the notion of trees.
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// Generated from antlr/treepat/Treepat.g4 by ANTLR 4.1
package antlr.treepat;
import org.antlr.v4.runtime.misc.NotNull;
import org.antlr.v4.runtime.tree.ParseTreeListener;

/**
 * This interface defines a complete listener for a parse tree produced by
 * {@link TreepatParser}.
 */
public interface TreepatListener extends ParseTreeListener {
	/**
	 * Enter a parse tree produced by {@link TreepatParser#indentWrapper}.
	 * @param ctx the parse tree
	 */
	void enterIndentWrapper(@NotNull TreepatParser.IndentWrapperContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#indentWrapper}.
	 * @param ctx the parse tree
	 */
	void exitIndentWrapper(@NotNull TreepatParser.IndentWrapperContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#depthClosure}.
	 * @param ctx the parse tree
	 */
	void enterDepthClosure(@NotNull TreepatParser.DepthClosureContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#depthClosure}.
	 * @param ctx the parse tree
	 */
	void exitDepthClosure(@NotNull TreepatParser.DepthClosureContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#indent}.
	 * @param ctx the parse tree
	 */
	void enterIndent(@NotNull TreepatParser.IndentContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#indent}.
	 * @param ctx the parse tree
	 */
	void exitIndent(@NotNull TreepatParser.IndentContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#breadthClosure}.
	 * @param ctx the parse tree
	 */
	void enterBreadthClosure(@NotNull TreepatParser.BreadthClosureContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#breadthClosure}.
	 * @param ctx the parse tree
	 */
	void exitBreadthClosure(@NotNull TreepatParser.BreadthClosureContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#nestedIndent}.
	 * @param ctx the parse tree
	 */
	void enterNestedIndent(@NotNull TreepatParser.NestedIndentContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#nestedIndent}.
	 * @param ctx the parse tree
	 */
	void exitNestedIndent(@NotNull TreepatParser.NestedIndentContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#dot}.
	 * @param ctx the parse tree
	 */
	void enterDot(@NotNull TreepatParser.DotContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#dot}.
	 * @param ctx the parse tree
	 */
	void exitDot(@NotNull TreepatParser.DotContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#union}.
	 * @param ctx the parse tree
	 */
	void enterUnion(@NotNull TreepatParser.UnionContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#union}.
	 * @param ctx the parse tree
	 */
	void exitUnion(@NotNull TreepatParser.UnionContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#atomTerm}.
	 * @param ctx the parse tree
	 */
	void enterAtomTerm(@NotNull TreepatParser.AtomTermContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#atomTerm}.
	 * @param ctx the parse tree
	 */
	void exitAtomTerm(@NotNull TreepatParser.AtomTermContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#nested}.
	 * @param ctx the parse tree
	 */
	void enterNested(@NotNull TreepatParser.NestedContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#nested}.
	 * @param ctx the parse tree
	 */
	void exitNested(@NotNull TreepatParser.NestedContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#depthTerm}.
	 * @param ctx the parse tree
	 */
	void enterDepthTerm(@NotNull TreepatParser.DepthTermContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#depthTerm}.
	 * @param ctx the parse tree
	 */
	void exitDepthTerm(@NotNull TreepatParser.DepthTermContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#subtree}.
	 * @param ctx the parse tree
	 */
	void enterSubtree(@NotNull TreepatParser.SubtreeContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#subtree}.
	 * @param ctx the parse tree
	 */
	void exitSubtree(@NotNull TreepatParser.SubtreeContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#node}.
	 * @param ctx the parse tree
	 */
	void enterNode(@NotNull TreepatParser.NodeContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#node}.
	 * @param ctx the parse tree
	 */
	void exitNode(@NotNull TreepatParser.NodeContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#sibling}.
	 * @param ctx the parse tree
	 */
	void enterSibling(@NotNull TreepatParser.SiblingContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#sibling}.
	 * @param ctx the parse tree
	 */
	void exitSibling(@NotNull TreepatParser.SiblingContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#atomTermWrapper}.
	 * @param ctx the parse tree
	 */
	void enterAtomTermWrapper(@NotNull TreepatParser.AtomTermWrapperContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#atomTermWrapper}.
	 * @param ctx the parse tree
	 */
	void exitAtomTermWrapper(@NotNull TreepatParser.AtomTermWrapperContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#treepat}.
	 * @param ctx the parse tree
	 */
	void enterTreepat(@NotNull TreepatParser.TreepatContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#treepat}.
	 * @param ctx the parse tree
	 */
	void exitTreepat(@NotNull TreepatParser.TreepatContext ctx);

	/**
	 * Enter a parse tree produced by {@link TreepatParser#child}.
	 * @param ctx the parse tree
	 */
	void enterChild(@NotNull TreepatParser.ChildContext ctx);
	/**
	 * Exit a parse tree produced by {@link TreepatParser#child}.
	 * @param ctx the parse tree
	 */
	void exitChild(@NotNull TreepatParser.ChildContext ctx);
}