Added scopes, variables and functions

1 files changed, 41 insertions, 0 deletions

diff --git a/main/core/runtime/Function.java b/main/core/runtime/Function.java
new file mode 100644
index 0000000..cf6422f
--- /dev/null
+++ b/main/core/runtime/Function.java
@@ -0,0 +1,41 @@
+package com.jantuomi.interpreter.main.core.runtime;
+
+import com.jantuomi.interpreter.main.core.parser.ast.FunctionBodyNode;
+import com.jantuomi.interpreter.main.core.parser.datatype.DataContainer;
+
+import java.util.List;
+
+/**
+ * Created by jan on 20.6.2016.
+ */
+public class Function {
+
+    private List<String> argumentNames;
+
+    private FunctionBodyNode body;
+
+    public Function(List<String> argumentNames, FunctionBodyNode body) {
+        this.argumentNames = argumentNames;
+        this.body = body;
+    }
+
+    public DataContainer evaluate(List<DataContainer> params) {
+        State.getInstance().createScope();
+
+        if (params.size() != argumentNames.size()) {
+            return null;
+        }
+
+        for (int i = 0; i < argumentNames.size(); i++) {
+            State.getInstance().addSymbolToScope(argumentNames.get(i));
+            State.getInstance().setSymbolValueToScope(argumentNames.get(i), params.get(i));
+        }
+
+        DataContainer returnValue = body.evaluate();
+
+        State.getInstance().popScope();
+
+        return returnValue;
+    }
+
+}