From 42a897dae1bfa58ab665f5012c2ac160316bcb75 Mon Sep 17 00:00:00 2001
From: bjculkin <bjculkin@mix.wvu.edu>
Date: Fri, 24 Mar 2017 18:28:34 -0400
Subject: Update Pratt Parser

---
 .../pratt/commands/InitialInterleaveCommand.java   | 29 +++++++++++++++++++++
 .../pratt/commands/InterleaveSpecifier.java        | 30 ++++++++++++++++++++++
 .../parserutils/splitter/TwoLevelSplitter.java     | 14 ++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InitialInterleaveCommand.java
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InterleaveSpecifier.java

(limited to 'BJC-Utils2/src/main/java')

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InitialInterleaveCommand.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InitialInterleaveCommand.java
new file mode 100644
index 0000000..554cf30
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InitialInterleaveCommand.java
@@ -0,0 +1,29 @@
+package bjc.utils.parserutils.pratt.commands;
+
+import bjc.utils.data.ITree;
+import bjc.utils.parserutils.ParserException;
+import bjc.utils.parserutils.pratt.ParserContext;
+import bjc.utils.parserutils.pratt.Token;
+
+/**
+ * Represents a configurable initial command.
+ * 
+ * @author EVE
+ *
+ * @param <K>
+ *                The token key type.
+ * 
+ * @param <V>
+ *                The token value type.
+ * 
+ * @param <C>
+ *                The parser state type.
+ */
+public class InitialInterleaveCommand<K, V, C> extends AbstractInitialCommand<K, V, C> {
+	@Override
+	protected ITree<Token<K, V>> intNullDenotation(Token<K, V> operator, ParserContext<K, V, C> ctx)
+			throws ParserException {
+		return null;
+	}
+
+}
diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InterleaveSpecifier.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InterleaveSpecifier.java
new file mode 100644
index 0000000..fa2c592
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/commands/InterleaveSpecifier.java
@@ -0,0 +1,30 @@
+package bjc.utils.parserutils.pratt.commands;
+
+/**
+ * The specifier for what to do for each element of a command.
+ * 
+ * @author EVE
+ *
+ */
+public class InterleaveSpecifier {
+	/**
+	 * The type of this specifier.
+	 * 
+	 * @author EVE
+	 *
+	 */
+	public static enum Type {
+		/**
+		 * Parse an expression with the given priority.
+		 */
+		EXPRESSION,
+		/**
+		 * Parse a statement with the given priority.
+		 */
+		STATEMENT,
+		/**
+		 * Expect a token of a certain type to be present.
+		 */
+		EXPECT, LITERAL;
+	}
+}
\ No newline at end of file
diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/splitter/TwoLevelSplitter.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/splitter/TwoLevelSplitter.java
index 38f303d..d65b06a 100644
--- a/BJC-Utils2/src/main/java/bjc/utils/parserutils/splitter/TwoLevelSplitter.java
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/splitter/TwoLevelSplitter.java
@@ -99,6 +99,20 @@ public class TwoLevelSplitter implements TokenSplitter {
 		}
 	}
 
+	/**
+	 * Exclude strings matching a regex from both splits.
+	 *
+	 * @param exclusions
+	 *                The regexes to exclude matches for.
+	 */
+	public void exclude(String... exclusions) {
+		for(String exclusion : exclusions) {
+			high.addNonMatcher(exclusion);
+
+			low.addNonMatcher(exclusion);
+		}
+	}
+
 	/**
 	 * Ready the splitter for use.
 	 */
-- 
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