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1 files changed, 37 insertions, 0 deletions

diff --git a/Homework/cs5300/p4-formatter/submit/ast/Expression.java b/Homework/cs5300/p4-formatter/submit/ast/Expression.java
new file mode 100644
index 0000000..1c2ba9b
--- /dev/null
+++ b/Homework/cs5300/p4-formatter/submit/ast/Expression.java
@@ -0,0 +1,37 @@
+/*
+ * Code formatter project
+ * CS 4481
+ */
+package submit.ast;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ *
+ * @author edwajohn, simponic :3
+ */
+public interface Expression extends Node {
+    public static void joinExpressionOperatorLists(List<BinaryOperatorType> binaryOperatorTypes, List<Expression> exprs,
+            StringBuilder builder) {
+        int numExpr = exprs.size();
+        Expression lhs = exprs.get(0);
+        if (numExpr == 1)
+            lhs.toCminus(builder, "");
+        if (numExpr > 1) {
+            BinaryOperator binOp = null;
+            for (int i = 0; i < binaryOperatorTypes.size(); i++) {
+                binOp = new BinaryOperator(lhs, binaryOperatorTypes.get(i), exprs.get(i + 1));
+                lhs = binOp;
+            }
+            binOp.toCminus(builder, "");
+        }
+    }
+
+    public static void joinExpressions(BinaryOperatorType binaryOperatorType, List<Expression> exprs,
+            StringBuilder builder) {
+        Expression.joinExpressionOperatorLists(Arrays.asList(new BinaryOperatorType[exprs.size() - 1]).stream()
+                .map(e -> binaryOperatorType).collect(Collectors.toList()), exprs, builder);
+    }
+}