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Disambiguate the grammar for backtick.

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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.
This commit is contained in:
Guido van Rossum 2002-05-24 15:47:06 +00:00
parent a0a6c5a042
commit 2d3b986480
5 changed files with 93 additions and 59 deletions
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5
Python/compile.c
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@ -2474,6 +2474,7 @@ com_assign(struct compiling *c, node *n, int assigning, node *augn)
case exprlist:
case testlist:
case testlist1:
if (NCH(n) > 1) {
if (assigning > OP_APPLY) {
com_error(c, PyExc_SyntaxError,
@ -2955,6 +2956,7 @@ is_constant_false(struct compiling *c, node *n)
case expr_stmt:
case testlist:
case testlist1:
case test:
case and_test:
case not_test:
@ -3356,6 +3358,7 @@ get_rawdocstring(node *n)
case expr_stmt:
case testlist:
case testlist1:
case test:
case and_test:
case not_test:
@ -3704,6 +3707,7 @@ com_node(struct compiling *c, node *n)
/* Expression nodes */
case testlist:
case testlist1:
case testlist_safe:
com_list(c, n, 0);
break;
@ -5447,6 +5451,7 @@ symtable_assign(struct symtable *st, node *n, int def_flag)
return;
case exprlist:
case testlist:
case testlist1:
if (NCH(n) == 1) {
n = CHILD(n, 0);
goto loop;