General update

1 files changed, 96 insertions, 0 deletions

diff --git a/base/src/bjc/dicelang/expr/ExprREPL.java b/base/src/bjc/dicelang/expr/ExprREPL.java
new file mode 100644
index 0000000..84149a0
--- /dev/null
+++ b/base/src/bjc/dicelang/expr/ExprREPL.java
@@ -0,0 +1,96 @@
+package bjc.dicelang.expr;
+
+import java.util.Scanner;
+
+import bjc.utils.data.ITree;
+import bjc.utils.funcdata.IList;
+import bjc.utils.parserutils.TreeConstructor;
+
+public class ExprREPL {
+
+	/*
+	 * @TODO 10/08/17 Ben Culkin :MainSeperation
+	 * 
+	 * This main method should be moved to its own class.
+	 */
+	/**
+	 * Main method.
+	 *
+	 * @param args
+	 *        Unused CLI args.
+	 */
+	public static void main(final String[] args) {
+		/* Create our objects. */
+		final Tokens toks = new Tokens();
+		final Lexer lex = new Lexer();
+
+		/* Prepare our input source. */
+		final Scanner scan = new Scanner(System.in);
+
+		/* Read initial command. */
+		System.out.print("Enter a math expression (blank line to quit): ");
+		String ln = scan.nextLine().trim();
+
+		/* Enter REPL loop. */
+		while (!ln.equals("")) {
+			/* Print raw command. */
+			System.out.println("Raw command: " + ln);
+			System.out.println();
+
+			/* Lex command to infix tokens. */
+			final Token[] infixTokens = lex.lexString(ln, toks);
+			System.out.println("Lexed tokens: ");
+			for (final Token tok : infixTokens) {
+				System.out.println("\t" + tok);
+			}
+
+			/* Print out infix expression. */
+			System.out.print("Lexed expression: ");
+			for (final Token tok : infixTokens) {
+				System.out.print(tok.toExpr() + " ");
+			}
+
+			/* Space stages. */
+			System.out.println();
+			System.out.println();
+
+			/* Shunt infix tokens to postfix tokens. */
+			final IList<Token> postfixTokens = Shunter.shuntTokens(infixTokens);
+			System.out.println("Lexed tokens: ");
+			for (final Token tok : postfixTokens) {
+				System.out.println("\t" + tok);
+			}
+
+			/* Print out postfix tokens. */
+			System.out.print("Shunted expression: ");
+			for (final Token tok : postfixTokens) {
+				System.out.print(tok.toExpr() + " ");
+			}
+
+			/* Space stages. */
+			System.out.println();
+			System.out.println();
+
+			/* Construct a tree from the list of postfixed tokens. */
+			final ITree<Token> ast = TreeConstructor.constructTree(postfixTokens, tok -> tok.typ.isOperator);
+
+			/* Print the tree, then the canonical expression for it. */
+			System.out.println("Parsed tree");
+			System.out.println(ast.toString());
+			System.out.println("\nCanonical expr: " + Parser.toCanonicalExpr(ast));
+
+			/* Space stages. */
+			System.out.println();
+			System.out.println();
+
+			/* Prompt for a new expression. */
+			System.out.print("Enter a math expression (blank line to quit): ");
+			/* Read it. */
+			ln = scan.nextLine().trim();
+		}
+
+		/* Cleanup after ourselves. */
+		scan.close();
+	}
+
+}