Add builtin function 'in'

2 files changed, 39 insertions, 0 deletions

diff --git a/main/core/runtime/builtins/BuiltinManager.java b/main/core/runtime/builtins/BuiltinManager.java
index 21027a6..e001cda 100644
--- a/main/core/runtime/builtins/BuiltinManager.java
+++ b/main/core/runtime/builtins/BuiltinManager.java
@@ -19,6 +19,7 @@ public class BuiltinManager {
 
     private BuiltinManager() {
         builtins.add(new OutBuiltinFunction());
+        builtins.add(new InBuiltinFunction());
     }
 
     public List<Function> getBuiltins() {
diff --git a/main/core/runtime/builtins/InBuiltinFunction.java b/main/core/runtime/builtins/InBuiltinFunction.java
new file mode 100644
index 0000000..32d6b72
--- /dev/null
+++ b/main/core/runtime/builtins/InBuiltinFunction.java
@@ -0,0 +1,38 @@
+package com.jantuomi.interpreter.main.core.runtime.builtins;
+
+import com.jantuomi.interpreter.main.core.parser.datatype.DataContainer;
+import com.jantuomi.interpreter.main.core.parser.datatype.StringDataContainer;
+import com.jantuomi.interpreter.main.core.runtime.Function;
+import com.jantuomi.interpreter.main.exception.InterpreterException;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Scanner;
+
+/**
+ * Created by jan on 21.6.2016.
+ */
+public class InBuiltinFunction extends Function {
+    public InBuiltinFunction() {
+        super(
+                Arrays.asList("expression"),
+                null
+        );
+    }
+
+    @Override
+    public String getName() {
+        return "in";
+    }
+
+    @Override
+    public DataContainer evaluate(List<DataContainer> params) throws InterpreterException {
+        if (params.size() > 0) {
+            DataContainer param = params.get(0);
+            System.out.print(param.getData().toString());
+        }
+        Scanner in = new Scanner(System.in);
+        String userInput = in.nextLine();
+        return new StringDataContainer(userInput);
+    }
+}