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parse.y: set used flag in gettable

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* parse.y (dvar_defined_ref, dvar_defined): rename macros.  only
  gettable uses the former.  assignable should not set LVAR_USED
  flag.

* parse.y (gettable_gen): set used flag on local/dynamic variables
  instead of setting in lexer.  [ruby-core:82368] [Bug #13809]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59585 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-08-13 13:34:26 +00:00
parent 2bbc30520f
commit 29b114a1ea
2 changed files with 23 additions and 16 deletions
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36
parse.y
View file

@ -586,8 +586,9 @@ static void local_var_gen(struct parser_params*, ID);
#define local_var(id) local_var_gen(parser, (id))
static void arg_var_gen(struct parser_params*, ID);
#define arg_var(id) arg_var_gen(parser, (id))
static int local_id_gen(struct parser_params*, ID);
#define local_id(id) local_id_gen(parser, (id))
static int local_id_gen(struct parser_params*, ID, ID **);
#define local_id_ref(id, vidp) local_id_gen(parser, (id), &(vidp))
#define local_id(id) local_id_gen(parser, (id), NULL)
static ID internal_id_gen(struct parser_params*);
#define internal_id() internal_id_gen(parser)
@ -598,9 +599,9 @@ static void dyna_pop_gen(struct parser_params*, const struct vtable *);
static int dyna_in_block_gen(struct parser_params*);
#define dyna_in_block() dyna_in_block_gen(parser)
#define dyna_var(id) local_var(id)
static int dvar_defined_gen(struct parser_params*,ID,int);
#define dvar_defined(id) dvar_defined_gen(parser, (id), 0)
#define dvar_defined_get(id) dvar_defined_gen(parser, (id), 1)
static int dvar_defined_gen(struct parser_params*, ID, ID**);
#define dvar_defined_ref(id, vidp) dvar_defined_gen(parser, (id), &(vidp))
#define dvar_defined(id) dvar_defined_gen(parser, (id), NULL)
static int dvar_curr_gen(struct parser_params*,ID);
#define dvar_curr(id) dvar_curr_gen(parser, (id))
@ -6791,7 +6792,7 @@ formal_argument_gen(struct parser_params *parser, ID lhs)
static int
lvar_defined_gen(struct parser_params *parser, ID id)
{
return (dyna_in_block() && dvar_defined_get(id)) || local_id(id);
return (dyna_in_block() && dvar_defined(id)) || local_id(id);
}
/* emacsen -*- hack */
@ -8578,6 +8579,8 @@ yylex(YYSTYPE *lval, struct parser_params *parser)
return t;
}
#define LVAR_USED ((ID)1 << (sizeof(ID) * CHAR_BIT - 1))
#ifndef RIPPER
static NODE*
node_newnode(struct parser_params *parser, enum node_type type, VALUE a0, VALUE a1, VALUE a2)
@ -8932,6 +8935,7 @@ past_dvar_p(struct parser_params *parser, ID id)
static NODE*
gettable_gen(struct parser_params *parser, ID id)
{
ID *vidp = NULL;
switch (id) {
case keyword_self:
return NEW_SELF();
@ -8950,16 +8954,18 @@ gettable_gen(struct parser_params *parser, ID id)
}
switch (id_type(id)) {
case ID_LOCAL:
if (dyna_in_block() && dvar_defined(id)) {
if (dyna_in_block() && dvar_defined_ref(id, vidp)) {
if (id == current_arg) {
rb_warn1("circular argument reference - %"PRIsWARN, rb_id2str(id));
}
if (vidp) *vidp |= LVAR_USED;
return NEW_DVAR(id);
}
if (local_id(id)) {
if (local_id_ref(id, vidp)) {
if (id == current_arg) {
rb_warn1("circular argument reference - %"PRIsWARN, rb_id2str(id));
}
if (vidp) *vidp |= LVAR_USED;
return NEW_LVAR(id);
}
# if WARN_PAST_SCOPE
@ -9325,8 +9331,6 @@ is_private_local_id(ID name)
return RSTRING_PTR(s)[0] == '_';
}
#define LVAR_USED ((ID)1 << (sizeof(ID) * CHAR_BIT - 1))
static int
shadowing_lvar_0(struct parser_params *parser, ID name)
{
@ -9335,7 +9339,7 @@ shadowing_lvar_0(struct parser_params *parser, ID name)
if (dvar_curr(name)) {
yyerror("duplicated argument name");
}
else if (dvar_defined_get(name) || local_id(name)) {
else if (dvar_defined(name) || local_id(name)) {
rb_warning1("shadowing outer local variable - %"PRIsWARN, rb_id2str(name));
vtable_add(lvtbl->vars, name);
if (lvtbl->used) {
@ -10389,7 +10393,7 @@ local_var_gen(struct parser_params *parser, ID id)
}
static int
local_id_gen(struct parser_params *parser, ID id)
local_id_gen(struct parser_params *parser, ID id, ID **vidrefp)
{
struct vtable *vars, *args, *used;
@ -10411,7 +10415,7 @@ local_id_gen(struct parser_params *parser, ID id)
}
else {
int i = vtable_included(vars, id);
if (i && used) used->tbl[i-1] |= LVAR_USED;
if (i && used && vidrefp) *vidrefp = &used->tbl[i-1];
return i != 0;
}
}
@ -10477,7 +10481,7 @@ dyna_in_block_gen(struct parser_params *parser)
}
static int
dvar_defined_gen(struct parser_params *parser, ID id, int get)
dvar_defined_gen(struct parser_params *parser, ID id, ID **vidrefp)
{
struct vtable *vars, *args, *used;
int i;
@ -10491,12 +10495,12 @@ dvar_defined_gen(struct parser_params *parser, ID id, int get)
return 1;
}
if ((i = vtable_included(vars, id)) != 0) {
if (used) used->tbl[i-1] |= LVAR_USED;
if (used && vidrefp) *vidrefp = &used->tbl[i-1];
return 1;
}
args = args->prev;
vars = vars->prev;
if (get) used = 0;
if (!vidrefp) used = 0;
if (used) used = used->prev;
}

3
test/ruby/test_parse.rb
View file

@ -881,8 +881,11 @@ x = __ENCODING__
def test_unused_variable
o = Object.new
assert_warning(/assigned but unused variable/) {o.instance_eval("def foo; a=1; nil; end")}
assert_warning(/assigned but unused variable/) {o.instance_eval("def bar; a=1; a(); end")}
a = "\u{3042}"
assert_warning(/#{a}/) {o.instance_eval("def foo; #{a}=1; nil; end")}
o = Object.new
assert_warning(/assigned but unused variable/) {o.instance_eval("def foo; tap {a=1; a()}; end")}
end
def test_named_capture_conflict