1 files changed, 57 insertions, 0 deletions
diff --git a/source/app.d b/source/app.d
new file mode 100644
index 0000000..7d25f7f
--- /dev/null
+++ b/source/app.d
@@ -0,0 +1,57 @@
+import std.stdio;
+import std.string;
+import std.variant;
+
+import std.container.util : make;
+
+import base.stack;
+
+import definition = base.definition;
+import primitives = primitives.eval;
+
+Stack!Token resolve(Token token) {
+	try {
+		if ( primitives.evaluate(token) ) {
+			return primitives.result;
+		} else {
+			return token.visit!(
+				(int    value) => Stack!Token(Token(value)),
+				(bool   value) => Stack!Token(Token(value)),
+				(string word ) => definition.get(word)
+			);
+		}
+	}
+	catch (Exception ex) {
+		writeln("Error: ", ex.msg);
+		return Stack!Token();
+	}
+}
+
+void process(string value) {
+	auto buffer = make!(Stack!Token)(toToken(value));
+
+	do {
+		Token current = buffer.pop;
+
+		if ( !definition.handle(current) ) {
+			Stack!Token resolved = resolve(current);
+
+			if ( !resolved.empty ) {
+				if ( resolved.front == current ) {
+					stack.push(current);
+				} else {
+					buffer.insertFront(resolved[]);
+				}
+			}
+		}
+	}
+	while ( !buffer.empty );
+}
+
+void main() {
+	while ( !stdin.eof ) {
+		foreach ( token; stdin.readln.split ) {
+			process(token);
+		}
+	}
+}