More work on parse blocks

1 files changed, 74 insertions, 0 deletions

diff --git a/JPratt/src/main/java/bjc/pratt/commands/BlockNonInitialCommand.java b/JPratt/src/main/java/bjc/pratt/commands/BlockNonInitialCommand.java
new file mode 100644
index 0000000..9a5ffc9
--- /dev/null
+++ b/JPratt/src/main/java/bjc/pratt/commands/BlockNonInitialCommand.java
@@ -0,0 +1,74 @@
+package bjc.pratt.commands;
+
+import bjc.pratt.NonInitialCommand;
+import bjc.pratt.ParseBlock;
+import bjc.pratt.ParserContext;
+import bjc.pratt.Token;
+import bjc.utils.data.ITree;
+import bjc.utils.data.Tree;
+import bjc.utils.parserutils.ParserException;
+
+/**
+ * A non-initial command that delegates all of the work to a {@link ParseBlock}
+ * 
+ * @author bjculkin
+ *
+ * @param <K>
+ *                The token key type.
+ * 
+ * @param <V>
+ *                The token value type.
+ * 
+ * @param <C>
+ *                The parser state type.
+ */
+public class BlockNonInitialCommand<K, V, C> extends NonInitialCommand<K, V, C> {
+	private ParseBlock<K, V, C> innr;
+
+	private int	lftBind;
+	private int	nxtBind;
+
+	private Token<K, V> trm;
+
+	/**
+	 * Create a new non-initial command that delegates to a parse block.
+	 * 
+	 * @param inner
+	 *                The parse block to delegate to.
+	 * 
+	 * @param leftBind
+	 *                The left binding power (precedence).
+	 * 
+	 * @param rightBind
+	 *                The right binding power (associativity control).
+	 * 
+	 * @param term
+	 *                The token to use as the node in the AST.
+	 */
+	public BlockNonInitialCommand(ParseBlock<K, V, C> inner, int leftBind, int rightBind, Token<K, V> term) {
+		innr = inner;
+
+		lftBind = leftBind;
+		nxtBind = rightBind;
+
+		trm = term;
+	}
+
+	@Override
+	public ITree<Token<K, V>> denote(ITree<Token<K, V>> operand, Token<K, V> operator, ParserContext<K, V, C> ctx)
+			throws ParserException {
+		ITree<Token<K, V>> expression = innr.parse(ctx);
+
+		return new Tree<>(trm, expression);
+	}
+
+	@Override
+	public int leftBinding() {
+		return lftBind;
+	}
+
+	@Override
+	public int nextBinding() {
+		return nxtBind;
+	}
+}
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