Adding list accessor and for loop

spf.py

@@ -16,10 +16,18 @@ class SPFInterpreter(lark.visitors.Interpreter):
 
     def while_loop(self, el):
         while self.visit_children(el.children[0])[0]:
-            [self.visit_children(i) for i in el.children[1:]]
+            self.visit_children(el.children[1])
 
     def for_loop(self, el):
-        print("TODO: for")
+        type = el.children[0].value
+        name = el.children[1].value
+        self.variables.declare(type, name)
+
+        target = self.visit_children(el.children[2])[0]
+        for i in target:
+            self.variables.assign(name, i)
+            self.visit_children(el.children[3])
+        # TODO: delete the variable out of scope
 
     def afficher(self, el):
         ligne = ""
@@ -101,6 +109,10 @@ class SPFInterpreter(lark.visitors.Interpreter):
 
     sizeof = lambda self, el:len(self.visit_children(el)[1])
 
+    def list_get(self, el):
+        (left, right) = self.visit_children(el)
+        return left[right]
+
 
     def expression(self, el):
         return self.visit_children(el)[0]
@@ -111,6 +123,13 @@ class SPFInterpreter(lark.visitors.Interpreter):
     def variable(self, el):
         return self.variables.get(el.children[0].value)
 
+    def test(self,el):
+        if self.visit_children(el.children[0])[0]:
+            self.visit_children(el.children[1])
+        elif len(el.children) >= 3:
+            self.visit_children(el.children[2])
+
+
     # Literals
     string = lambda self, el: el.children[0][1:-1]
     entier = lambda self, el: int(el.children[0])