1 files changed, 26 insertions, 0 deletions
diff --git a/psi/interpreter.py b/psi/interpreter.py
index e69de29..f98a777 100644
--- a/psi/interpreter.py
+++ b/psi/interpreter.py
@@ -0,0 +1,26 @@
+from psi.lexer import Token
+
+
+__all__ = ['Interpreter']
+
+class Interpreter:
+    def __init__(self, ast):
+        self.ast = ast
+
+    def interpret(self):
+        return self.interpret_expr(self.ast)
+
+    def interpret_expr(self, node):
+        if isinstance(node, Token):
+            return node.value
+        elif isinstance(node, list):
+            for expr in node:
+                result = self.interpret_expr(expr)
+                if result is not None:
+                    return result
+
+    def interpret_condition(self, node):
+        variable = self.interpret_expr(node[0])
+        value = self.interpret_expr(node[2])
+
+        return variable == value