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Fixed numbered parameter check

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* parse.y (struct local_vars): moved numbered parameter NODEs for
  nesting check to separate per local variable scopes, as numbered
  parameters should belong to local variable scopes.  [Bug #16248]
This commit is contained in:
Nobuyoshi Nakada 2019-10-10 13:50:13 +09:00
parent a23b639050
commit c2065c64cb
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GPG key ID: 4BC7D6DF58D8DF60
2 changed files with 30 additions and 23 deletions
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49
parse.y
View file

@ -165,6 +165,11 @@ struct local_vars {
struct vtable *past;
# endif
struct local_vars *prev;
# ifndef RIPPER
struct {
NODE *outer, *inner, *current;
} numparam;
# endif
};
enum {
@ -295,10 +300,6 @@ struct parser_params {
VALUE error_buffer;
VALUE debug_lines;
const struct rb_iseq_struct *parent_iseq;
struct {
NODE *outer, *inner, *current;
} numparam;
#else
/* Ripper only */
@ -9828,8 +9829,9 @@ past_dvar_p(struct parser_params *p, ID id)
static int
numparam_nested_p(struct parser_params *p)
{
NODE *outer = p->numparam.outer;
NODE *inner = p->numparam.inner;
struct local_vars *local = p->lvtbl;
NODE *outer = local->numparam.outer;
NODE *inner = local->numparam.inner;
if (outer || inner) {
NODE *used = outer ? outer : inner;
compile_error(p, "numbered parameter is already used in\n"
@ -9906,7 +9908,8 @@ gettable(struct parser_params *p, ID id, const YYLTYPE *loc)
parser_numbered_param(p, NUMPARAM_ID_TO_IDX(id))) {
if (numparam_nested_p(p)) return 0;
node = NEW_DVAR(id, loc);
if (!p->numparam.current) p->numparam.current = node;
struct local_vars *local = p->lvtbl;
if (!local->numparam.current) local->numparam.current = node;
return node;
}
# if WARN_PAST_SCOPE
@ -11660,6 +11663,9 @@ local_push(struct parser_params *p, int toplevel_scope)
#ifndef RIPPER
if (toplevel_scope && compile_for_eval) warn_unused_vars = 0;
if (toplevel_scope && e_option_supplied(p)) warn_unused_vars = 0;
local->numparam.outer = 0;
local->numparam.inner = 0;
local->numparam.current = 0;
#endif
local->used = warn_unused_vars ? vtable_alloc(0) : 0;
@ -11692,11 +11698,6 @@ local_pop(struct parser_params *p)
COND_POP();
ruby_sized_xfree(p->lvtbl, sizeof(*p->lvtbl));
p->lvtbl = local;
# ifndef RIPPER
p->numparam.outer = 0;
p->numparam.inner = 0;
p->numparam.current = 0;
# endif
}
#ifndef RIPPER
@ -11803,12 +11804,13 @@ static NODE *
numparam_push(struct parser_params *p)
{
#ifndef RIPPER
NODE *inner = p->numparam.inner;
if (!p->numparam.outer) {
p->numparam.outer = p->numparam.current;
struct local_vars *local = p->lvtbl;
NODE *inner = local->numparam.inner;
if (!local->numparam.outer) {
local->numparam.outer = local->numparam.current;
}
p->numparam.inner = 0;
p->numparam.current = 0;
local->numparam.inner = 0;
local->numparam.current = 0;
return inner;
#else
return 0;
@ -11819,22 +11821,23 @@ static void
numparam_pop(struct parser_params *p, NODE *prev_inner)
{
#ifndef RIPPER
struct local_vars *local = p->lvtbl;
if (prev_inner) {
/* prefer first one */
p->numparam.inner = prev_inner;
local->numparam.inner = prev_inner;
}
else if (p->numparam.current) {
else if (local->numparam.current) {
/* current and inner are exclusive */
p->numparam.inner = p->numparam.current;
local->numparam.inner = local->numparam.current;
}
if (p->max_numparam > NO_PARAM) {
/* current and outer are exclusive */
p->numparam.current = p->numparam.outer;
p->numparam.outer = 0;
local->numparam.current = local->numparam.outer;
local->numparam.outer = 0;
}
else {
/* no numbered parameter */
p->numparam.current = 0;
local->numparam.current = 0;
}
#endif
}

4
test/ruby/test_syntax.rb
View file

@ -1465,6 +1465,10 @@ eom
assert_syntax_error('-> {-> {_1}; _2}', /numbered parameter is already used/)
assert_warn(/`_1' is used as numbered parameter/) {eval('proc {_1 = nil}')}
assert_warn(/`_2' is used as numbered parameter/) {eval('_2=1')}
['class C', 'class << C', 'module M', 'def m', 'def o.m'].each do |c|
assert_valid_syntax("->{#{c};->{_1};end;_1}\n")
assert_valid_syntax("->{_1;#{c};->{_1};end}\n")
end
end
def test_value_expr_in_condition