Mercurial > cpython-lru_cache-weakref

diff Modules/parsermodule.c @ 23538:9e67a0d5705f legacy-trunk

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Disambiguate the grammar for backtick. The old syntax suggested that a trailing comma was OK inside backticks, but in fact (due to ideosyncrasies of pgen) it was not. Fix the grammar to avoid the ambiguity. Fred: you may want to update the refman.
author Guido van Rossum <guido@python.org>
date Fri, 24 May 2002 15:47:06 +0000
parents 91dd223829c6
children ed1ba37a46b7
line wrap: on
line diff
--- a/Modules/parsermodule.c	Fri May 24 15:24:38 2002 +0000
+++ b/Modules/parsermodule.c	Fri May 24 15:47:06 2002 +0000
@@ -844,6 +844,7 @@
 VALIDATER(exprlist);            VALIDATER(dictmaker);
 VALIDATER(arglist);             VALIDATER(argument);
 VALIDATER(listmaker);           VALIDATER(yield_stmt);
+VALIDATER(testlist1);
 
 #undef VALIDATER
 
@@ -1057,6 +1058,14 @@
 
 
 static int
+validate_testlist1(node *tree)
+{
+    return (validate_repeating_list(tree, testlist1,
+                                    validate_test, "testlist1"));
+}
+
+
+static int
 validate_testlist_safe(node *tree)
 {
     return (validate_repeating_list(tree, testlist_safe,
@@ -2185,7 +2194,7 @@
             break;
           case BACKQUOTE:
             res = ((nch == 3)
-                   && validate_testlist(CHILD(tree, 1))
+                   && validate_testlist1(CHILD(tree, 1))
                    && validate_ntype(CHILD(tree, 2), BACKQUOTE));
             break;
           case NAME:
@@ -2671,6 +2680,9 @@
           case testlist:
             res = validate_testlist(tree);
             break;
+          case testlist1:
+            res = validate_testlist1(tree);
+            break;
           case test:
             res = validate_test(tree);
             break;