Exhaustion pt. 2

There is now syntax for rule references. Use @ instead of $, and use :=
to indicate you want exhaustion enabled

Use @ to refer to it

1 files changed, 47 insertions, 0 deletions

diff --git a/src/main/java/bjc/rgens/parser/elements/RuleVarRefCaseElement.java b/src/main/java/bjc/rgens/parser/elements/RuleVarRefCaseElement.java
new file mode 100644
index 0000000..a7be1bb
--- /dev/null
+++ b/src/main/java/bjc/rgens/parser/elements/RuleVarRefCaseElement.java
@@ -0,0 +1,47 @@
+package bjc.rgens.parser.elements;
+
+import bjc.utils.data.IPair;
+
+import bjc.rgens.parser.GenerationState;
+import bjc.rgens.parser.GrammarException;
+import bjc.rgens.parser.RecurLimitException;
+import bjc.rgens.parser.RGrammar;
+import bjc.rgens.parser.Rule;
+import bjc.rgens.parser.RuleCase;
+
+public class RuleVarRefCaseElement extends StringCaseElement {
+	public RuleVarRefCaseElement(String vl) {
+		super(vl, false);
+	}
+
+	public void generate(GenerationState state) {
+		if(!state.rlVars.containsKey(val)) {
+			throw new GrammarException("No rule variable named " + val);
+		}
+
+		IPair<RGrammar, Rule> par = state.rlVars.get(val);
+
+		GenerationState newState = state.newBuf();
+		newState.swapGrammar(par.getLeft());
+
+		if(par.getRight().doRecur()) {
+			RuleCase cse = par.getRight().getCase(state.rnd);
+			System.err.printf("\tFINE: Generating %s (from %s)\n", cse, par.getRight().name);
+
+			par.getLeft().generateCase(cse, newState);
+
+			par.getRight().endRecur();
+		} else {
+			throw new RecurLimitException("Rule recurrence limit exceeded");
+		}
+
+		String res = newState.contents.toString();
+
+		if (par.getRight().name.contains("+")) {
+			/* Rule names with pluses in them get space-flattened */
+			state.contents.append(res.replaceAll("\\s+", ""));
+		} else {
+			state.contents.append(res);
+		}
+	}
+}