Update Pratt parser

1 files changed, 51 insertions, 21 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/PreTernaryCommand.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/PreTernaryCommand.java
index 04604be..42d1a6e 100644
--- a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/PreTernaryCommand.java
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/PreTernaryCommand.java
@@ -3,43 +3,73 @@ package bjc.utils.parserutils.pratt.commands;
 import bjc.utils.data.ITree;
 import bjc.utils.data.Tree;
 import bjc.utils.parserutils.ParserException;
+import bjc.utils.parserutils.pratt.ParseBlock;
 import bjc.utils.parserutils.pratt.ParserContext;
 import bjc.utils.parserutils.pratt.Token;
 
+/**
+ * A prefix ternary operator, like an if/then/else group.
+ * 
+ * @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 PreTernaryCommand<K, V, C> extends AbstractInitialCommand<K, V, C> {
-	private int	cond1;
-	private int	block1;
-	private int	block2;
+	private Token<K, V> term;
 
-	private K	mark1;
-	private K	mark2;
+	private ParseBlock<K, V, C> condBlock;
 
-	private Token<K, V> term;
+	private ParseBlock<K, V, C>	opblock1;
+	private ParseBlock<K, V, C>	opblock2;
 
-	public PreTernaryCommand(int cond1, int block1, int block2, K mark1, K mark2, Token<K, V> term) {
+	/**
+	 * Create a new ternary statement.
+	 * 
+	 * @param cond
+	 *                The block for handling the condition.
+	 * 
+	 * @param op1
+	 *                The block for handling the first operator.
+	 * 
+	 * @param op2
+	 *                The block for handling the second operator.
+	 * 
+	 * @param term
+	 *                The token to use as the node for the AST.
+	 */
+	public PreTernaryCommand(ParseBlock<K, V, C> cond, ParseBlock<K, V, C> op1, ParseBlock<K, V, C> op2,
+			Token<K, V> term) {
 		super();
-		this.cond1 = cond1;
-		this.block1 = block1;
-		this.block2 = block2;
-		this.mark1 = mark1;
-		this.mark2 = mark2;
+
+		if (cond == null)
+			throw new NullPointerException("Cond block must not be null");
+		else if (op1 == null)
+			throw new NullPointerException("Op block #1 must not be null");
+		else if (op2 == null) throw new NullPointerException("Op block #2 must not be null");
+
+		this.condBlock = cond;
+		this.opblock1 = op1;
+		this.opblock2 = op2;
+
 		this.term = term;
 	}
 
-	@SuppressWarnings("unchecked")
 	@Override
 	protected ITree<Token<K, V>> intNullDenotation(Token<K, V> operator, ParserContext<K, V, C> ctx)
 			throws ParserException {
-		ITree<Token<K, V>> cond = ctx.parse.parseExpression(cond1, ctx.tokens, ctx.state, false);
-
-		ctx.tokens.expect(mark1);
-
-		ITree<Token<K, V>> fstBlock = ctx.parse.parseExpression(block1, ctx.tokens, ctx.state, false);
+		ITree<Token<K, V>> cond = condBlock.parse(ctx);
 
-		ctx.tokens.expect(mark2);
+		ITree<Token<K, V>> op1 = opblock1.parse(ctx);
 
-		ITree<Token<K, V>> sndBlock = ctx.parse.parseExpression(block2, ctx.tokens, ctx.state, false);
+		ITree<Token<K, V>> op2 = opblock2.parse(ctx);
 
-		return new Tree<>(term, cond, fstBlock, sndBlock);
+		return new Tree<>(term, cond, op1, op2);
 	}
 }
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