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hash literal deduplicates like Hash#[]=

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From: Eric Wong <e@80x24.org>

* hash.c (rb_hash_key_str): new function
  (hash_aset_str): use rb_hash_key_str
* internal.h: add rb_hash_key_str
* st.c (st_stringify): use rb_hash_key_str
* test/ruby/test_hash.rb (test_NEWHASH_fstring_key): dynamic key
  [ruby-core:84554] [Feature #14258]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
normal 2017-12-30 00:00:23 +00:00
parent 634a48c5c1
commit fc939f6697
4 changed files with 21 additions and 11 deletions
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24
hash.c
View file

@ -1582,19 +1582,25 @@ fstring_existing_str(VALUE str)
}
}
VALUE
rb_hash_key_str(VALUE key)
{
VALUE k;
if (!RB_OBJ_TAINTED(key) &&
(k = fstring_existing_str(key)) != Qnil) {
return k;
}
else {
return rb_str_new_frozen(key);
}
}
static int
hash_aset_str(st_data_t *key, st_data_t *val, struct update_arg *arg, int existing)
{
if (!existing && !RB_OBJ_FROZEN(*key)) {
VALUE k;
if (!RB_OBJ_TAINTED(*key) &&
(k = fstring_existing_str(*key)) != Qnil) {
*key = k;
}
else {
*key = rb_str_new_frozen(*key);
}
*key = rb_hash_key_str(*key);
}
return hash_aset(key, val, arg, existing);
}

1
internal.h
View file

@ -1284,6 +1284,7 @@ st_table *rb_init_identtable(void);
st_table *rb_init_identtable_with_size(st_index_t size);
VALUE rb_hash_compare_by_id_p(VALUE hash);
VALUE rb_to_hash_type(VALUE obj);
VALUE rb_hash_key_str(VALUE);
#define RHASH_TBL_RAW(h) rb_hash_tbl_raw(h)
VALUE rb_hash_keys(VALUE hash);

4
st.c
View file

@ -2114,8 +2114,8 @@ st_rehash(st_table *tab)
static st_data_t
st_stringify(VALUE key)
{
return (rb_obj_class(key) == rb_cString) ?
rb_str_new_frozen(key) : key;
return (rb_obj_class(key) == rb_cString && !RB_OBJ_FROZEN(key)) ?
rb_hash_key_str(key) : key;
}
static void

3
test/ruby/test_hash.rb
View file

@ -298,6 +298,9 @@ class TestHash < Test::Unit::TestCase
b = {"ABC" => :t}
assert_same a.keys[0], b.keys[0]
assert_same "ABC".freeze, a.keys[0]
var = +'ABC'
c = { var => :t }
assert_same "ABC".freeze, c.keys[0]
end
def test_tainted_string_key