1 files changed, 64 insertions, 0 deletions
diff --git a/JPratt/src/main/java/com/ashardalon/pratt/commands/impls/PostCircumfixCommand.java b/JPratt/src/main/java/com/ashardalon/pratt/commands/impls/PostCircumfixCommand.java
new file mode 100644
index 0000000..c5b60a1
--- /dev/null
+++ b/JPratt/src/main/java/com/ashardalon/pratt/commands/impls/PostCircumfixCommand.java
@@ -0,0 +1,64 @@
+package com.ashardalon.pratt.commands.impls;
+
+import bjc.data.Tree;
+
+import com.ashardalon.pratt.ParserContext;
+import com.ashardalon.pratt.blocks.ParseBlock;
+import com.ashardalon.pratt.commands.BinaryPostCommand;
+import com.ashardalon.pratt.commands.CommandResult;
+import com.ashardalon.pratt.commands.CommandResult.Status;
+import com.ashardalon.pratt.tokens.Token;
+
+import bjc.data.SimpleTree;
+import bjc.utils.parserutils.ParserException;
+
+/**
+ * A post-circumfix operator, like array indexing.
+ *
+ * @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 PostCircumfixCommand<K, V, C> extends BinaryPostCommand<K, V, C> {
+	private final ParseBlock<K, V, C> innerBlock;
+
+	private final Token<K, V> mark;
+
+	/**
+	 * Create a new post-circumfix operator.
+	 *
+	 * @param precedence
+	 *        The precedence of the operator.
+	 *
+	 * @param inner
+	 *        The block inside the expression.
+	 *
+	 * @param marker
+	 *        The token to use as the node for the AST.
+	 */
+	public PostCircumfixCommand(final int precedence, final ParseBlock<K, V, C> inner, final Token<K, V> marker) {
+		super(precedence);
+
+		if(inner == null) throw new NullPointerException("Inner block must not be null");
+
+		innerBlock = inner;
+
+		mark = marker;
+	}
+
+	@Override
+	public CommandResult<K, V> denote(final Tree<Token<K, V>> operand, final Token<K, V> operator,
+			final ParserContext<K, V, C> ctx) throws ParserException {
+		final CommandResult<K,V> insideRes = innerBlock.parse(ctx);
+		if (insideRes.status != Status.SUCCESS) return insideRes;
+		Tree<Token<K, V>> inside = insideRes.success();
+		return CommandResult.success(new SimpleTree<>(mark, operand, inside));
+	}
+}
+\ No newline at end of file