From 6b881e8833596d669fdee9525e064aea0c8946dc Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Tue, 11 Apr 2017 23:12:34 -0400
Subject: Add exceptions to sample lang.

---
 .../bjc/pratt/examples/lang/PrattParserTest.java   | 22 ++++++++++++++----
 .../java/bjc/pratt/examples/lang/Tokenizer.java    | 26 ++++++++--------------
 2 files changed, 27 insertions(+), 21 deletions(-)

(limited to 'JPratt/src/examples/java/bjc')

diff --git a/JPratt/src/examples/java/bjc/pratt/examples/lang/PrattParserTest.java b/JPratt/src/examples/java/bjc/pratt/examples/lang/PrattParserTest.java
index 20450a1..3686a84 100644
--- a/JPratt/src/examples/java/bjc/pratt/examples/lang/PrattParserTest.java
+++ b/JPratt/src/examples/java/bjc/pratt/examples/lang/PrattParserTest.java
@@ -33,10 +33,12 @@ import bjc.pratt.tokens.StringToken;
 import bjc.pratt.tokens.StringTokenStream;
 import bjc.utils.data.ITree;
 import bjc.utils.data.TransformIterator;
+import bjc.utils.funcdata.IList;
 import bjc.utils.parserutils.ParserException;
 import bjc.utils.parserutils.splitter.ChainTokenSplitter;
 import bjc.utils.parserutils.splitter.ConfigurableTokenSplitter;
 import bjc.utils.parserutils.splitter.ExcludingTokenSplitter;
+import bjc.utils.parserutils.splitter.FilteredTokenSplitter;
 import bjc.utils.parserutils.splitter.TokenSplitter;
 
 /**
@@ -83,6 +85,7 @@ public class PrattParserTest {
 		reserved.addAll(Arrays.asList("begin", "end"));
 		reserved.addAll(Arrays.asList("switch", "case"));
 		reserved.addAll(Arrays.asList("sqrt", "cbrt", "root"));
+		reserved.addAll(Arrays.asList("try", "catch", "finally"));
 		reserved.add("var");
 
 		final ChainTokenSplitter nsplit = new ChainTokenSplitter();
@@ -115,6 +118,8 @@ public class PrattParserTest {
 
 		excluder.addLiteralExclusions(reserved.toArray(new String[0]));
 
+		final FilteredTokenSplitter filtered = new FilteredTokenSplitter(excluder, (tok) -> !tok.equals(""));
+
 		final PrattParser<String, String, TestContext> parser = createParser();
 
 		final TestContext ctx = new TestContext();
@@ -125,7 +130,7 @@ public class PrattParserTest {
 		String ln = scn.nextLine();
 
 		while (!ln.trim().equals("")) {
-			final Iterator<Token<String, String>> tokens = preprocessInput(ops, excluder, ln, reserved,
+			final Iterator<Token<String, String>> tokens = preprocessInput(ops, filtered, ln, reserved,
 					ctx);
 
 			try {
@@ -165,6 +170,8 @@ public class PrattParserTest {
 		final List<String> splitTokens = new LinkedList<>();
 
 		for (final String raw : rawTokens) {
+			if (raw.equals("")) continue;
+
 			boolean doSplit = false;
 
 			for (final String op : ops) {
@@ -175,9 +182,10 @@ public class PrattParserTest {
 			}
 
 			if (doSplit) {
-				final String[] strangs = split.split(raw).toArray(new String[0]);
+				IList<String> splitStrangs = split.split(raw);
+				splitStrangs.removeMatching("");
 
-				splitTokens.addAll(Arrays.asList(strangs));
+				splitStrangs.forEach(splitTokens::add);
 			} else {
 				splitTokens.add(raw);
 			}
@@ -217,7 +225,11 @@ public class PrattParserTest {
 
 		parser.addNonInitialCommand(":", infixNon(3));
 
-		final NonInitialCommand<String, String, TestContext> ifElse = ternary(5, 0, "else", litToken("cond"),
+		parser.addNonInitialCommand("finally", infixLeft(4));
+
+		parser.addNonInitialCommand("catch", infixLeft(5));
+
+		final NonInitialCommand<String, String, TestContext> ifElse = ternary(6, 0, "else", litToken("cond"),
 				false);
 		parser.addNonInitialCommand("if", ifElse);
 
@@ -283,6 +295,8 @@ public class PrattParserTest {
 				idfun, idfun, idfun, false);
 		parser.addInitialCommand("{", jsonLiteral);
 
+		parser.addInitialCommand("try", unary(3));
+
 		parser.addInitialCommand("case", unary(5));
 
 		parser.addInitialCommand("-", unary(30));
diff --git a/JPratt/src/examples/java/bjc/pratt/examples/lang/Tokenizer.java b/JPratt/src/examples/java/bjc/pratt/examples/lang/Tokenizer.java
index ea162be..800a4ec 100644
--- a/JPratt/src/examples/java/bjc/pratt/examples/lang/Tokenizer.java
+++ b/JPratt/src/examples/java/bjc/pratt/examples/lang/Tokenizer.java
@@ -25,22 +25,14 @@ final class Tokenizer implements Function<String, Token<String, String>> {
 	public Token<String, String> apply(final String strang) {
 		if (ops.contains(strang) || reserved.contains(strang))
 			return litToken(strang);
-		else if (strang.matches("(?:[\\u00B2\\u00B3\\u00B9\\u2070]|[\\u2074-\\u2079])+")) /*
-													 * This
-													 * regular
-													 * expression
-													 * matches
-													 * series
-													 * of
-													 * unicode
-													 * super
-													 * -
-													 * scripts
-													 * 1
-													 * -
-													 * 9.
-													 */
-			return new StringToken("(superexp)", strang);
-		else return new StringToken("(literal)", strang);
+		else if (strang.matches("(?:[\\u00B2\\u00B3\\u00B9\\u2070]|[\\u2074-\\u2079])+")) {
+			/*
+			 * This regular expression matches series of unicode
+			 * super - scripts 1 - 9.
+			 */
+			String subscript = strang;
+
+			return new StringToken("(superexp)", subscript);
+		} else return new StringToken("(literal)", strang);
 	}
 }
-- 
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