From f394306a4b65a3328551f9f6b8d4abff8bfd5b27 Mon Sep 17 00:00:00 2001
From: bjculkin <bjculkin@WIT-136XG42.wvu-ad.wvu.edu>
Date: Wed, 12 Apr 2017 10:46:51 -0400
Subject: Package reorganization

---
 .../bjc/pratt/commands/impls/ChainCommand.java     | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 JPratt/src/main/java/bjc/pratt/commands/impls/ChainCommand.java

(limited to 'JPratt/src/main/java/bjc/pratt/commands/impls/ChainCommand.java')

diff --git a/JPratt/src/main/java/bjc/pratt/commands/impls/ChainCommand.java b/JPratt/src/main/java/bjc/pratt/commands/impls/ChainCommand.java
new file mode 100644
index 0000000..2a9bf35
--- /dev/null
+++ b/JPratt/src/main/java/bjc/pratt/commands/impls/ChainCommand.java
@@ -0,0 +1,75 @@
+package bjc.pratt.commands.impls;
+
+import java.util.Set;
+
+import bjc.pratt.ParserContext;
+import bjc.pratt.commands.BinaryPostCommand;
+import bjc.pratt.tokens.Token;
+import bjc.utils.data.ITree;
+import bjc.utils.data.Tree;
+import bjc.utils.parserutils.ParserException;
+
+/**
+ * Create a new chained operator.
+ *
+ * @author bjculkin
+ *
+ * @param <K>
+ *                The key type of the tokens.
+ *
+ * @param <V>
+ *                The value type of the tokens.
+ *
+ * @param <C>
+ *                The state type of the parser.
+ */
+public class ChainCommand<K, V, C> extends BinaryPostCommand<K, V, C> {
+	private final Set<K> chainWith;
+
+	private final Token<K, V> chain;
+
+	/**
+	 * Create a new chained operator.
+	 *
+	 * @param precedence
+	 *                The precedence of this operator.
+	 *
+	 * @param chainSet
+	 *                The operators to chain with.
+	 *
+	 * @param chainMarker
+	 *                The token to use as the node in the AST.
+	 */
+	public ChainCommand(final int precedence, final Set<K> chainSet, final Token<K, V> chainMarker) {
+		super(precedence);
+
+		chainWith = chainSet;
+		chain = chainMarker;
+	}
+
+	@Override
+	public ITree<Token<K, V>> denote(final ITree<Token<K, V>> operand, final Token<K, V> operator,
+			final ParserContext<K, V, C> ctx) throws ParserException {
+		final ITree<Token<K, V>> tree = ctx.parse.parseExpression(1 + leftBinding(), ctx.tokens, ctx.state,
+				false);
+
+		final ITree<Token<K, V>> res = new Tree<>(operator, operand, tree);
+
+		if (chainWith.contains(ctx.tokens.current().getKey())) {
+			final Token<K, V> tok = ctx.tokens.current();
+			ctx.tokens.next();
+
+			final ITree<Token<K, V>> other = denote(tree, tok,
+					new ParserContext<>(ctx.tokens, ctx.parse, ctx.state));
+
+			return new Tree<>(chain, res, other);
+		}
+
+		return res;
+	}
+
+	@Override
+	public int nextBinding() {
+		return leftBinding() - 1;
+	}
+}
\ No newline at end of file
-- 
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