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| author | Michael Ploujnikov <michael.ploujnikov@oracle.com> | 2019-01-21 19:04:04 +0000 |
|---|---|---|
| committer | Michael Ploujnikov <plouj@gcc.gnu.org> | 2019-01-21 19:04:04 +0000 |
| commit | 3b1f091c4b6881cd60f6f37c31b0054e04d137cc (patch) | |
| tree | 0dae35d7f9650ce70726e092cb7b4e781f5a1406 /gcc/hash-map-tests.c | |
| parent | 9011fa06de952258f7e514bd37c5265a73d15781 (diff) | |
| download | gcc-3b1f091c4b6881cd60f6f37c31b0054e04d137cc.zip gcc-3b1f091c4b6881cd60f6f37c31b0054e04d137cc.tar.gz gcc-3b1f091c4b6881cd60f6f37c31b0054e04d137cc.tar.bz2 | |
hash-map-tests.c (test_map_of_strings_to_int): Show how to use string contents as hash_map keys.
* hash-map-tests.c (test_map_of_strings_to_int): Show how to use
string contents as hash_map keys.
From-SVN: r268121
Diffstat (limited to 'gcc/hash-map-tests.c')
| -rw-r--r-- | gcc/hash-map-tests.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/hash-map-tests.c b/gcc/hash-map-tests.c index 7b7a1c8..2137464 100644 --- a/gcc/hash-map-tests.c +++ b/gcc/hash-map-tests.c @@ -77,6 +77,26 @@ test_map_of_strings_to_int () m.remove (eric); ASSERT_EQ (5, m.elements ()); ASSERT_EQ (NULL, m.get (eric)); + + /* A plain char * key is hashed based on its value (address), rather + than the string it points to. */ + char *another_ant = static_cast <char *> (xcalloc (4, 1)); + another_ant[0] = 'a'; + another_ant[1] = 'n'; + another_ant[2] = 't'; + another_ant[3] = 0; + ASSERT_NE (ant, another_ant); + unsigned prev_size = m.elements (); + ASSERT_EQ (false, m.put (another_ant, 7)); + ASSERT_EQ (prev_size + 1, m.elements ()); + + /* Need to use string_hash or nofree_string_hash key types to hash + based on the string contents. */ + hash_map <nofree_string_hash, int> string_map; + ASSERT_EQ (false, string_map.put (ant, 1)); + ASSERT_EQ (1, string_map.elements ()); + ASSERT_EQ (true, string_map.put (another_ant, 5)); + ASSERT_EQ (1, string_map.elements ()); } /* Run all of the selftests within this file. */ |