From 12fd9362751871711fad12fea01f39a38c2f32e8 Mon Sep 17 00:00:00 2001
From: "Benjamin J. Culkin" <bjculkin@mix.wvu.edu>
Date: Sun, 23 Jul 2017 20:10:44 -0300
Subject: Simplify parser.

The parser no longer uses a modal builder, so grammar blocks could now
be done in a parallel manner
---
 .../java/bjc/rgens/newparser/RGrammarBuilder.java  | 99 +++-------------------
 1 file changed, 12 insertions(+), 87 deletions(-)

(limited to 'RGens/src/main/java/bjc/rgens/newparser/RGrammarBuilder.java')

diff --git a/RGens/src/main/java/bjc/rgens/newparser/RGrammarBuilder.java b/RGens/src/main/java/bjc/rgens/newparser/RGrammarBuilder.java
index b4f9f45..bd8ba84 100644
--- a/RGens/src/main/java/bjc/rgens/newparser/RGrammarBuilder.java
+++ b/RGens/src/main/java/bjc/rgens/newparser/RGrammarBuilder.java
@@ -17,10 +17,6 @@ import static bjc.rgens.newparser.RuleCase.CaseType.*;
  *
  */
 public class RGrammarBuilder {
-	private IList<CaseElement> currentCase;
-
-	private Rule currRule;
-
 	private Map<String, Rule> rules;
 
 	private Set<String> exportedRules;
@@ -34,30 +30,23 @@ public class RGrammarBuilder {
 		rules = new HashMap<>();
 
 		exportedRules = new HashSet<>();
-
-		currentCase = new FunctionalList<>();
 	}
 
-	/**
-	 * Starts a rule with the provided name.
-	 *
-	 * If the rule already exists, it will be opened for adding additional
-	 * cases instead.
-	 *
-	 * @param rName
-	 *                The name of the rule currently being built.
-	 *
-	 * @throws IllegalArgumentException
-	 *                 If the rule name is the empty string.
-	 */
-	public void startRule(String rName) {
-		if (rName == null) {
+	public Rule getOrCreateRule(String rName) {
+		if(rName == null)
 			throw new NullPointerException("Rule name must not be null");
-		} else if (rName.equals("")) {
+		else if(rName.equals(""))
 			throw new IllegalArgumentException("The empty string is not a valid rule name");
-		}
 
-		currRule = new Rule(rName);
+		if(rules.containsKey(rName))
+			return rules.get(rName);
+		else {
+			Rule ret = new Rule(rName);
+
+			rules.put(rName, ret);
+
+			return ret;
+		}
 	}
 
 	/**
@@ -75,70 +64,6 @@ public class RGrammarBuilder {
 		return grammar;
 	}
 
-	/**
-	 * Adds a case part to this rule.
-	 *
-	 * <h2>Case part formatting</h2>
-	 * <dl>
-	 * <dt>Rule Reference</dt>
-	 * <dd>Rule references are marked by being surrounded with square
-	 * brackets (the square brackets are part of the rule's name)</dd>
-	 * <dt>Literal Strings</dt>
-	 * <dd>Literal strings are the default case part type.</dd>
-	 * </dl>
-	 *
-	 * @param csepart
-	 */
-	public void addCasePart(String csepart) {
-		CaseElement element = CaseElement.createElement(csepart);
-
-		currentCase.add(element);
-	}
-
-	/**
-	 * Finalizes editing a rule.
-	 *
-	 * Saves the rule to the rule map.
-	 *
-	 * @throws IllegalStateException
-	 *                 Must be invoked while a rule is being edited.
-	 */
-	public void finishRule() {
-		if (currRule == null) {
-			throw new IllegalStateException("Must start a rule before finishing one");
-		}
-
-		rules.put(currRule.name, currRule);
-	}
-
-	/**
-	 * Finishes the current case being edited.
-	 *
-	 * @throws IllegalStateException
-	 *                 Must be invoked while a rule is being edited.
-	 */
-	public void finishCase() {
-		if (currRule == null) {
-			throw new IllegalStateException("Must start a rule before finishing a case");
-		}
-
-		currRule.addCase(new RuleCase(NORMAL, currentCase));
-
-		currentCase = new FunctionalList<>();
-	}
-
-	/**
-	 * Begins a case for the current rule.
-	 *
-	 * @throws IllegalStateException
-	 *                 Must be invoked while a rule is being edited.
-	 */
-	public void beginCase() {
-		if (currRule == null) {
-			throw new IllegalStateException("Must start a rule before adding cases");
-		}
-	}
-
 	/**
 	 * Set the initial rule of the grammar.
 	 *
-- 
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