Define methods once per type

1 files changed, 29 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/couscous/interpreter/Arguments.java b/src/main/java/org/zwobble/couscous/interpreter/Arguments.java
new file mode 100644
index 0000000..d08393d
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/interpreter/Arguments.java
@@ -0,0 +1,29 @@
+package org.zwobble.couscous.interpreter;
+
+import java.util.List;
+
+import org.zwobble.couscous.values.InterpreterValue;
+
+import lombok.val;
+
+public class Arguments {
+    private int index = 0;
+    private List<InterpreterValue> values;
+    
+    public Arguments(List<InterpreterValue> values) {
+        this.values = values;
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T extends InterpreterValue> T pop(Class<T> valueType) {
+        val value = values.get(index);
+        index++;
+        if (valueType.isInstance(value)) {
+            return (T) value;            
+        } else {
+            // TODO: throw a more specific error
+            throw new UnsupportedOperationException();
+        }
+        
+    }
+}