string operations including concatenation work

boa/code/method.py

@@ -65,7 +65,6 @@ class Method():
 
     tokenizer = None
 
-
     local_stores = None
 
     start_line_no = None
@@ -219,10 +218,10 @@ def process_block_groups(self):
 
 
     def tokenize(self):
-
+        prevtoken = None
         for t in self.tokens:
-            t.to_vm(self.tokenizer)
-
+            t.to_vm(self.tokenizer, prevtoken)
+            prevtoken = t
 
     def convert_jumps(self):
         for key,vm_token in self.tokenizer.vm_tokens.items():

boa/code/token.py

@@ -69,7 +69,7 @@ def __str__(self):
         return '%s      %s   %s' % (self.line_no, self.addr, self.op_name)
 
 
-    def to_vm(self, tokenizer):
+    def to_vm(self, tokenizer, prev_token=None):
 
         self.tokenizer = tokenizer
         token = None
@@ -132,7 +132,13 @@ def to_vm(self, tokenizer):
 
             #math
             elif op == pyop.BINARY_ADD:
-                token = tokenizer.convert1(OpCode.ADD, self)
+                print('prevtoken %s ' % prev_token, type(prev_token.args))
+
+                if prev_token and type(prev_token.args) is str:
+                    print("adding cat!!!")
+                    token = tokenizer.convert1(OpCode.CAT, self)
+                else:
+                    token = tokenizer.convert1(OpCode.ADD, self)
 
             elif op == pyop.BINARY_SUBTRACT:
                 token = tokenizer.convert1(OpCode.SUB, self)
@@ -162,12 +168,8 @@ def to_vm(self, tokenizer):
                 elif self.args == '==':
                     token = tokenizer.convert1(OpCode.EQUAL, self)
 
-#                tokn = tokenizer.convert1(Op)
+        return token
 
-#        print("created vm token %s " % token)
-#
-#        if token is None:
-#            print("did not get token for %s %s" % (self, self.op_name))
 
 class VMToken():
 
@@ -244,7 +246,7 @@ def to_s(self):
 
                 lno = "{:<10}".format(pt.line_no if do_print_line_no or pstart else '')
                 addr = "{:<4}".format(key)
-                op = "{:<20}".format(str(pt.op_name))
+                op = "{:<20}".format(str(pt.py_op))
                 arg = "{:<50}".format(to_label if to_label is not None else pt.arg_s)
 
                 print("%s%s%s%s" % (lno,addr,op,arg))

boa/tests/src/StringTest1.py

@@ -4,12 +4,13 @@
 class SCTest(FunctionCode):
 
     @staticmethod
-    def Main(a):
+    def Main(a, b):
 
+        c = a + b
 
-        if a == 'hello':
+        if c == 'hellogoodbye':
 
-            return 2
+            return a + b + a + b
 
 
         return 1