fixes 151

test/simple_source/bug27+/05_while_if_continue.py

@@ -0,0 +1,11 @@
+# Issue 151 for Python 2.7
+# Bug was two-fold. Not having a rile for a while loop with an ending return statement
+# and allowing iflastsmtl to have an optional c_stmt which allowed the "if" to get
+# comined into the "while". A separate analysis for control flow should make this
+# simpiler.
+def func(a, b, c):
+    while a:
+        if b:
+            continue
+        return False
+    return True

uncompyle6/parser.py

@@ -323,7 +323,7 @@ class PythonParser(GenericASTBuilder):
         stmt   ::= return
         return ::= ret_expr RETURN_VALUE
 
-        # returns are a sequence of statements that ends in a RETURN statement.
+        # "returns" nonterminal is a sequence of statements that ends in a RETURN statement.
         # In later Python versions with jump optimization, this can cause JUMPs
         # that would normally appear to be omitted.
 

uncompyle6/parsers/parse27.py

@@ -64,7 +64,7 @@ class Python27Parser(Python2Parser):
 
     def p_jump27(self, args):
         """
-        iflaststmtl ::= testexpr c_stmts_opt
+        iflaststmtl     ::= testexpr c_stmts
 
         _ifstmts_jump   ::= c_stmts_opt JUMP_FORWARD come_froms
         bp_come_from    ::= POP_BLOCK COME_FROM
@@ -119,6 +119,8 @@ class Python27Parser(Python2Parser):
                 POP_BLOCK LOAD_CONST COME_FROM_WITH
                 WITH_CLEANUP END_FINALLY
 
+        whilestmt         ::= SETUP_LOOP testexpr returns POP_BLOCK COME_FROM
+
         while1stmt        ::= SETUP_LOOP returns bp_come_from
         while1stmt        ::= SETUP_LOOP l_stmts_opt JUMP_BACK POP_BLOCK COME_FROM
         whilestmt         ::= SETUP_LOOP testexpr l_stmts_opt JUMP_BACK POP_BLOCK _come_froms