Implement Pratt parser.

1 files changed, 47 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/ParserContext.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/ParserContext.java
new file mode 100644
index 0000000..55b5e98
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/ParserContext.java
@@ -0,0 +1,47 @@
+package bjc.utils.parserutils.pratt;
+
+/**
+ * Represents the contextual state passed to a command.
+ * 
+ * @author EVE
+ *
+ * @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 ParserContext<K, V, C> {
+	/**
+	 * The source of tokens.
+	 */
+	public TokenStream<K, V>	tokens;
+	/**
+	 * The parser for sub-expressions.
+	 */
+	public PrattParser<K, V, C>	parse;
+	/**
+	 * The state of the parser.
+	 */
+	public C			state;
+
+	/**
+	 * Create a new parser context.
+	 * 
+	 * @param tokens
+	 *                The source of tokens.
+	 * 
+	 * @param parse
+	 *                The parser to call for sub expressions.
+	 * 
+	 * @param state
+	 *                Any state needing to be kept during parsing.
+	 */
+	public ParserContext(TokenStream<K, V> tokens, PrattParser<K, V, C> parse, C state) {
+		this.tokens = tokens;
+		this.parse = parse;
+		this.state = state;
+	}
+}
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